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Windows — Onscreen display areas in the target window system

Functions

GdkWindow * gdk_window_new ()
void gdk_window_destroy ()
GdkDisplay * gdk_window_get_display ()
GdkScreen * gdk_window_get_screen ()
GdkVisual * gdk_window_get_visual ()
int gdk_window_get_width ()
int gdk_window_get_height ()
GdkWindowType gdk_window_get_window_type ()
GdkWindow * gdk_window_at_pointer ()
void gdk_window_show ()
void gdk_window_show_unraised ()
void gdk_window_hide ()
gboolean gdk_window_is_destroyed ()
gboolean gdk_window_is_visible ()
gboolean gdk_window_is_viewable ()
gboolean gdk_window_is_shaped ()
gboolean gdk_window_is_input_only ()
GdkWindowState gdk_window_get_state ()
void gdk_window_withdraw ()
void gdk_window_iconify ()
void gdk_window_deiconify ()
void gdk_window_stick ()
void gdk_window_unstick ()
void gdk_window_maximize ()
void gdk_window_unmaximize ()
void gdk_window_fullscreen ()
void gdk_window_unfullscreen ()
void gdk_window_set_keep_above ()
void gdk_window_set_keep_below ()
void gdk_window_set_opacity ()
void gdk_window_set_composited ()
gboolean gdk_window_get_composited ()
void gdk_window_move ()
void gdk_window_resize ()
void gdk_window_move_resize ()
void gdk_window_scroll ()
void gdk_window_move_region ()
void gdk_window_flush ()
gboolean gdk_window_has_native ()
gboolean gdk_window_ensure_native ()
void gdk_window_reparent ()
void gdk_window_clear ()
void gdk_window_clear_area ()
void gdk_window_clear_area_e ()
#define gdk_window_copy_area()
void gdk_window_raise ()
void gdk_window_lower ()
void gdk_window_restack ()
void gdk_window_focus ()
void gdk_window_register_dnd ()
void gdk_window_begin_resize_drag ()
void gdk_window_begin_move_drag ()
void gdk_window_constrain_size ()
void gdk_window_beep ()
void gdk_window_begin_paint_rect ()
void gdk_window_begin_paint_region ()
void gdk_window_end_paint ()
void gdk_window_invalidate_rect ()
void gdk_window_invalidate_region ()
void gdk_window_invalidate_maybe_recurse ()
GdkRegion * gdk_window_get_update_area ()
void gdk_window_freeze_updates ()
void gdk_window_thaw_updates ()
void gdk_window_process_all_updates ()
void gdk_window_process_updates ()
void gdk_window_set_debug_updates ()
void gdk_window_get_internal_paint_info ()
void gdk_window_enable_synchronized_configure ()
void gdk_window_configure_finished ()
void gdk_window_set_user_data ()
void gdk_window_set_override_redirect ()
void gdk_window_set_accept_focus ()
gboolean gdk_window_get_accept_focus ()
void gdk_window_set_focus_on_map ()
gboolean gdk_window_get_focus_on_map ()
void gdk_window_add_filter ()
void gdk_window_remove_filter ()
GdkFilterReturn (*GdkFilterFunc) ()
void gdk_window_shape_combine_mask ()
void gdk_window_shape_combine_region ()
void gdk_window_set_child_shapes ()
void gdk_window_merge_child_shapes ()
void gdk_window_input_shape_combine_mask ()
void gdk_window_input_shape_combine_region ()
void gdk_window_set_child_input_shapes ()
void gdk_window_merge_child_input_shapes ()
gboolean gdk_window_set_static_gravities ()
void gdk_window_set_hints ()
void gdk_window_set_title ()
void gdk_window_set_background ()
void gdk_window_set_back_pixmap ()
cairo_pattern_t * gdk_window_get_background_pattern ()
void gdk_window_set_cursor ()
GdkCursor * gdk_window_get_cursor ()
void gdk_window_get_user_data ()
void gdk_window_get_geometry ()
void gdk_window_set_geometry_hints ()
void gdk_window_set_icon_list ()
void gdk_window_set_modal_hint ()
gboolean gdk_window_get_modal_hint ()
void gdk_window_set_type_hint ()
GdkWindowTypeHint gdk_window_get_type_hint ()
void gdk_window_set_skip_taskbar_hint ()
void gdk_window_set_skip_pager_hint ()
void gdk_window_set_urgency_hint ()
void gdk_window_get_position ()
void gdk_window_get_root_origin ()
void gdk_window_get_frame_extents ()
gint gdk_window_get_origin ()
gboolean gdk_window_get_deskrelative_origin ()
void gdk_window_get_root_coords ()
void gdk_window_coords_from_parent ()
void gdk_window_coords_to_parent ()
GdkWindow * gdk_window_get_pointer ()
GdkWindow * gdk_window_get_parent ()
GdkWindow * gdk_window_get_effective_parent ()
GdkWindow * gdk_window_get_toplevel ()
GdkWindow * gdk_window_get_effective_toplevel ()
GList * gdk_window_get_children ()
GList * gdk_window_peek_children ()
GdkEventMask gdk_window_get_events ()
void gdk_window_set_events ()
void gdk_window_set_icon ()
void gdk_window_set_icon_name ()
void gdk_window_set_transient_for ()
void gdk_window_set_role ()
void gdk_window_set_startup_id ()
void gdk_window_set_group ()
GdkWindow * gdk_window_get_group ()
void gdk_window_set_decorations ()
gboolean gdk_window_get_decorations ()
void gdk_window_set_functions ()
GList * gdk_window_get_toplevels ()
GdkWindow * gdk_get_default_root_window ()
GdkPointerHooks * gdk_set_pointer_hooks ()
GdkPixmap * gdk_offscreen_window_get_pixmap ()
void gdk_offscreen_window_set_embedder ()
GdkWindow * gdk_offscreen_window_get_embedder ()
void gdk_window_geometry_changed ()
void gdk_window_redirect_to_drawable ()
void gdk_window_remove_redirection ()

Properties

GdkCursor * cursor Read / Write

Object Hierarchy

    GObject
    ╰── GdkDrawable
        ╰── GdkWindow

Includes

#include <gdk/gdk.h>

Description

A GdkWindow is a rectangular region on the screen. It's a low-level object, used to implement high-level objects such as GtkWidget and GtkWindow on the GTK+ level. A GtkWindow is a toplevel window, the thing a user might think of as a "window" with a titlebar and so on; a GtkWindow may contain many GdkWindow. For example, each GtkButton has a GdkWindow associated with it.

Composited Windows

Normally, the windowing system takes care of rendering the contents of a child window onto its parent window. This mechanism can be intercepted by calling gdk_window_set_composited() on the child window. For a composited window it is the responsibility of the application to render the window contents at the right spot.

Example 7. Composited windows

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#include <gtk/gtk.h>
/* The expose event handler for the event box.
 *
 * This function simply draws a transparency onto a widget on the area
 * for which it receives expose events.  This is intended to give the
 * event box a "transparent" background.
 *
 * In order for this to work properly, the widget must have an RGBA
 * colourmap.  The widget should also be set as app-paintable since it
 * doesn't make sense for GTK+ to draw a background if we are drawing it
 * (and because GTK+ might actually replace our transparency with its
 * default background colour).
 */
static gboolean
transparent_expose (GtkWidget      *widget,
                    GdkEventExpose *event)
{
  cairo_t *cr;
  cr = gdk_cairo_create (widget->window);
  cairo_set_operator (cr, CAIRO_OPERATOR_CLEAR);
  gdk_cairo_region (cr, event->region);
  cairo_fill (cr);
  cairo_destroy (cr);
  return FALSE;
}
/* The expose event handler for the window.
 *
 * This function performs the actual compositing of the event box onto
 * the already-existing background of the window at 50% normal opacity.
 *
 * In this case we do not want app-paintable to be set on the widget
 * since we want it to draw its own (red) background. Because of this,
 * however, we must ensure that we use g_signal_connect_after so that
 * this handler is called after the red has been drawn. If it was
 * called before then GTK would just blindly paint over our work.
 *
 * Note: if the child window has children, then you need a cairo 1.6
 * feature to make this work correctly.
 */
static gboolean
window_expose_event (GtkWidget      *widget,
                     GdkEventExpose *event)
{
  GdkRegion *region;
  GtkWidget *child;
  cairo_t *cr;
  /* get our child (in this case, the event box) */
  child = gtk_bin_get_child (GTK_BIN (widget));
  /* create a cairo context to draw to the window */
  cr = gdk_cairo_create (widget->window);
  /* the source data is the (composited) event box */
  gdk_cairo_set_source_pixmap (cr, child->window,
                               child->allocation.x,
                               child->allocation.y);
  /* draw no more than our expose event intersects our child */
  region = gdk_region_rectangle (&child->allocation);
  gdk_region_intersect (region, event->region);
  gdk_cairo_region (cr, region);
  cairo_clip (cr);
  /* composite, with a 50% opacity */
  cairo_set_operator (cr, CAIRO_OPERATOR_OVER);
  cairo_paint_with_alpha (cr, 0.5);
  /* we're done */
  cairo_destroy (cr);
  return FALSE;
}
int
main (int argc, char **argv)
{
  GtkWidget *window, *event, *button;
  GdkScreen *screen;
  GdkColormap *rgba;
  GdkColor red;
  gtk_init (&argc, &argv);
  /* Make the widgets */
  button = gtk_button_new_with_label ("A Button");
  event = gtk_event_box_new ();
  window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
  /* Put a red background on the window */
  gdk_color_parse ("red", &red);
  gtk_widget_modify_bg (window, GTK_STATE_NORMAL, &red);
  /* Set the colourmap for the event box.
   * Must be done before the event box is realised.
   */
  screen = gtk_widget_get_screen (event);
  rgba = gdk_screen_get_rgba_colormap (screen);
  gtk_widget_set_colormap (event, rgba);
  /* Set our event box to have a fully-transparent background
   * drawn on it. Currently there is no way to simply tell GTK+
   * that "transparency" is the background colour for a widget.
   */
  gtk_widget_set_app_paintable (GTK_WIDGET (event), TRUE);
  g_signal_connect (event, "expose-event",
                    G_CALLBACK (transparent_expose), NULL);
  /* Put them inside one another */
  gtk_container_set_border_width (GTK_CONTAINER (window), 10);
  gtk_container_add (GTK_CONTAINER (window), event);
  gtk_container_add (GTK_CONTAINER (event), button);
  /* Realise and show everything */
  gtk_widget_show_all (window);
  /* Set the event box GdkWindow to be composited.
   * Obviously must be performed after event box is realised.
   */
  gdk_window_set_composited (event->window, TRUE);
  /* Set up the compositing handler.
   * Note that we do _after_ so that the normal (red) background is drawn
   * by gtk before our compositing occurs.
   */
  g_signal_connect_after (window, "expose-event",
                          G_CALLBACK (window_expose_event), NULL);
  gtk_main ();
  return 0;
}

In the example Example 7, “Composited windows”, a button is placed inside of an event box inside of a window. The event box is set as composited and therefore is no longer automatically drawn to the screen.

When the contents of the event box change, an expose event is generated on its parent window (which, in this case, belongs to the toplevel GtkWindow). The expose handler for this widget is responsible for merging the changes back on the screen in the way that it wishes.

In our case, we merge the contents with a 50% transparency. We also set the background colour of the window to red. The effect is that the background shows through the button.


Offscreen Windows

Offscreen windows are more general than composited windows, since they allow not only to modify the rendering of the child window onto its parent, but also to apply coordinate transformations.

To integrate an offscreen window into a window hierarchy, one has to call gdk_offscreen_window_set_embedder() and handle a number of signals. The “pick-embedded-child” signal on the embedder window is used to select an offscreen child at given coordinates, and the “to-embedder” and “from-embedder” signals on the offscreen window are used to translate coordinates between the embedder and the offscreen window.

For rendering an offscreen window onto its embedder, the contents of the offscreen window are available as a pixmap, via gdk_offscreen_window_get_pixmap().

Functions

gdk_window_new ()

GdkWindow *
gdk_window_new (GdkWindow *parent,
                GdkWindowAttr *attributes,
                gint attributes_mask);

Creates a new GdkWindow using the attributes from attributes . See GdkWindowAttr and GdkWindowAttributesType for more details. Note: to use this on displays other than the default display, parent must be specified.

Parameters

parent

a GdkWindow, or NULL to create the window as a child of the default root window for the default display.

[allow-none]

attributes

attributes of the new window

 

attributes_mask

mask indicating which fields in attributes are valid

 

Returns

the new GdkWindow.

[transfer none]


gdk_window_destroy ()

void
gdk_window_destroy (GdkWindow *window);

Destroys the window system resources associated with window and decrements window 's reference count. The window system resources for all children of window are also destroyed, but the children's reference counts are not decremented.

Note that a window will not be destroyed automatically when its reference count reaches zero. You must call this function yourself before that happens.

Parameters

window

a GdkWindow

 

gdk_window_get_display ()

GdkDisplay *
gdk_window_get_display (GdkWindow *window);

Gets the GdkDisplay associated with a GdkWindow.

Parameters

window

a GdkWindow

 

Returns

the GdkDisplay associated with window

Since: 2.24


gdk_window_get_screen ()

GdkScreen *
gdk_window_get_screen (GdkWindow *window);

Gets the GdkScreen associated with a GdkWindow.

Parameters

window

a GdkWindow

 

Returns

the GdkScreen associated with window

Since: 2.24


gdk_window_get_visual ()

GdkVisual *
gdk_window_get_visual (GdkWindow *window);

Gets the GdkVisual describing the pixel format of window .

Parameters

window

a GdkWindow

 

Returns

a GdkVisual

Since: 2.24


gdk_window_get_width ()

int
gdk_window_get_width (GdkWindow *window);

Returns the width of the given window .

On the X11 platform the returned size is the size reported in the most-recently-processed configure event, rather than the current size on the X server.

Parameters

window

a GdkWindow

 

Returns

The width of window

Since: 2.24


gdk_window_get_height ()

int
gdk_window_get_height (GdkWindow *window);

Returns the height of the given window .

On the X11 platform the returned size is the size reported in the most-recently-processed configure event, rather than the current size on the X server.

Parameters

window

a GdkWindow

 

Returns

The height of window

Since: 2.24


gdk_window_get_window_type ()

GdkWindowType
gdk_window_get_window_type (GdkWindow *window);

Gets the type of the window. See GdkWindowType.

Parameters

window

a GdkWindow

 

Returns

type of window


gdk_window_at_pointer ()

GdkWindow *
gdk_window_at_pointer (gint *win_x,
                       gint *win_y);

Obtains the window underneath the mouse pointer, returning the location of that window in win_x , win_y . Returns NULL if the window under the mouse pointer is not known to GDK (if the window belongs to another application and a GdkWindow hasn't been created for it with gdk_window_foreign_new())

NOTE: For multihead-aware widgets or applications use gdk_display_get_window_at_pointer() instead.

Parameters

win_x

return location for origin of the window under the pointer.

[out][allow-none]

win_y

return location for origin of the window under the pointer.

[out][allow-none]

Returns

window under the mouse pointer.

[transfer none]


gdk_window_show ()

void
gdk_window_show (GdkWindow *window);

Like gdk_window_show_unraised(), but also raises the window to the top of the window stack (moves the window to the front of the Z-order).

This function maps a window so it's visible onscreen. Its opposite is gdk_window_hide().

When implementing a GtkWidget, you should call this function on the widget's GdkWindow as part of the "map" method.

Parameters

window

a GdkWindow

 

gdk_window_show_unraised ()

void
gdk_window_show_unraised (GdkWindow *window);

Shows a GdkWindow onscreen, but does not modify its stacking order. In contrast, gdk_window_show() will raise the window to the top of the window stack.

On the X11 platform, in Xlib terms, this function calls XMapWindow() (it also updates some internal GDK state, which means that you can't really use XMapWindow() directly on a GDK window).

Parameters

window

a GdkWindow

 

gdk_window_hide ()

void
gdk_window_hide (GdkWindow *window);

For toplevel windows, withdraws them, so they will no longer be known to the window manager; for all windows, unmaps them, so they won't be displayed. Normally done automatically as part of gtk_widget_hide().

Parameters

window

a GdkWindow

 

gdk_window_is_destroyed ()

gboolean
gdk_window_is_destroyed (GdkWindow *window);

Check to see if a window is destroyed..

Parameters

window

a GdkWindow

 

Returns

TRUE if the window is destroyed

Since: 2.18


gdk_window_is_visible ()

gboolean
gdk_window_is_visible (GdkWindow *window);

Checks whether the window has been mapped (with gdk_window_show() or gdk_window_show_unraised()).

Parameters

window

a GdkWindow

 

Returns

TRUE if the window is mapped


gdk_window_is_viewable ()

gboolean
gdk_window_is_viewable (GdkWindow *window);

Check if the window and all ancestors of the window are mapped. (This is not necessarily "viewable" in the X sense, since we only check as far as we have GDK window parents, not to the root window.)

Parameters

window

a GdkWindow

 

Returns

TRUE if the window is viewable


gdk_window_is_shaped ()

gboolean
gdk_window_is_shaped (GdkWindow *window);

Determines whether or not the window is shaped.

Parameters

window

a toplevel GdkWindow

 

Returns

TRUE if window is shaped

Since: 2.22


gdk_window_is_input_only ()

gboolean
gdk_window_is_input_only (GdkWindow *window);

Determines whether or not the window is an input only window.

Parameters

window

a toplevel GdkWindow

 

Returns

TRUE if window is input only

Since: 2.22


gdk_window_get_state ()

GdkWindowState
gdk_window_get_state (GdkWindow *window);

Gets the bitwise OR of the currently active window state flags, from the GdkWindowState enumeration.

Parameters

window

a GdkWindow

 

Returns

window state bitfield


gdk_window_withdraw ()

void
gdk_window_withdraw (GdkWindow *window);

Withdraws a window (unmaps it and asks the window manager to forget about it). This function is not really useful as gdk_window_hide() automatically withdraws toplevel windows before hiding them.

Parameters

window

a toplevel GdkWindow

 

gdk_window_iconify ()

void
gdk_window_iconify (GdkWindow *window);

Asks to iconify (minimize) window . The window manager may choose to ignore the request, but normally will honor it. Using gtk_window_iconify() is preferred, if you have a GtkWindow widget.

This function only makes sense when window is a toplevel window.

Parameters

window

a toplevel GdkWindow

 

gdk_window_deiconify ()

void
gdk_window_deiconify (GdkWindow *window);

Attempt to deiconify (unminimize) window . On X11 the window manager may choose to ignore the request to deiconify. When using GTK+, use gtk_window_deiconify() instead of the GdkWindow variant. Or better yet, you probably want to use gtk_window_present(), which raises the window, focuses it, unminimizes it, and puts it on the current desktop.

Parameters

window

a toplevel GdkWindow

 

gdk_window_stick ()

void
gdk_window_stick (GdkWindow *window);

"Pins" a window such that it's on all workspaces and does not scroll with viewports, for window managers that have scrollable viewports. (When using GtkWindow, gtk_window_stick() may be more useful.)

On the X11 platform, this function depends on window manager support, so may have no effect with many window managers. However, GDK will do the best it can to convince the window manager to stick the window. For window managers that don't support this operation, there's nothing you can do to force it to happen.

Parameters

window

a toplevel GdkWindow

 

gdk_window_unstick ()

void
gdk_window_unstick (GdkWindow *window);

Reverse operation for gdk_window_stick(); see gdk_window_stick(), and gtk_window_unstick().

Parameters

window

a toplevel GdkWindow

 

gdk_window_maximize ()

void
gdk_window_maximize (GdkWindow *window);

Maximizes the window. If the window was already maximized, then this function does nothing.

On X11, asks the window manager to maximize window , if the window manager supports this operation. Not all window managers support this, and some deliberately ignore it or don't have a concept of "maximized"; so you can't rely on the maximization actually happening. But it will happen with most standard window managers, and GDK makes a best effort to get it to happen.

On Windows, reliably maximizes the window.

Parameters

window

a toplevel GdkWindow

 

gdk_window_unmaximize ()

void
gdk_window_unmaximize (GdkWindow *window);

Unmaximizes the window. If the window wasn't maximized, then this function does nothing.

On X11, asks the window manager to unmaximize window , if the window manager supports this operation. Not all window managers support this, and some deliberately ignore it or don't have a concept of "maximized"; so you can't rely on the unmaximization actually happening. But it will happen with most standard window managers, and GDK makes a best effort to get it to happen.

On Windows, reliably unmaximizes the window.

Parameters

window

a toplevel GdkWindow

 

gdk_window_fullscreen ()

void
gdk_window_fullscreen (GdkWindow *window);

Moves the window into fullscreen mode. This means the window covers the entire screen and is above any panels or task bars.

If the window was already fullscreen, then this function does nothing.

On X11, asks the window manager to put window in a fullscreen state, if the window manager supports this operation. Not all window managers support this, and some deliberately ignore it or don't have a concept of "fullscreen"; so you can't rely on the fullscreenification actually happening. But it will happen with most standard window managers, and GDK makes a best effort to get it to happen.

Parameters

window

a toplevel GdkWindow

 

Since: 2.2


gdk_window_unfullscreen ()

void
gdk_window_unfullscreen (GdkWindow *window);

Moves the window out of fullscreen mode. If the window was not fullscreen, does nothing.

On X11, asks the window manager to move window out of the fullscreen state, if the window manager supports this operation. Not all window managers support this, and some deliberately ignore it or don't have a concept of "fullscreen"; so you can't rely on the unfullscreenification actually happening. But it will happen with most standard window managers, and GDK makes a best effort to get it to happen.

Parameters

window

a toplevel GdkWindow

 

Since: 2.2


gdk_window_set_keep_above ()

void
gdk_window_set_keep_above (GdkWindow *window,
                           gboolean setting);

Set if window must be kept above other windows. If the window was already above, then this function does nothing.

On X11, asks the window manager to keep window above, if the window manager supports this operation. Not all window managers support this, and some deliberately ignore it or don't have a concept of "keep above"; so you can't rely on the window being kept above. But it will happen with most standard window managers, and GDK makes a best effort to get it to happen.

Parameters

window

a toplevel GdkWindow

 

setting

whether to keep window above other windows

 

Since: 2.4


gdk_window_set_keep_below ()

void
gdk_window_set_keep_below (GdkWindow *window,
                           gboolean setting);

Set if window must be kept below other windows. If the window was already below, then this function does nothing.

On X11, asks the window manager to keep window below, if the window manager supports this operation. Not all window managers support this, and some deliberately ignore it or don't have a concept of "keep below"; so you can't rely on the window being kept below. But it will happen with most standard window managers, and GDK makes a best effort to get it to happen.

Parameters

window

a toplevel GdkWindow

 

setting

whether to keep window below other windows

 

Since: 2.4


gdk_window_set_opacity ()

void
gdk_window_set_opacity (GdkWindow *window,
                        gdouble opacity);

Request the windowing system to make window partially transparent, with opacity 0 being fully transparent and 1 fully opaque. (Values of the opacity parameter are clamped to the [0,1] range.)

On X11, this works only on X screens with a compositing manager running.

For setting up per-pixel alpha, see gdk_screen_get_rgba_colormap(). For making non-toplevel windows translucent, see gdk_window_set_composited().

Parameters

window

a top-level GdkWindow

 

opacity

opacity

 

Since: 2.12


gdk_window_set_composited ()

void
gdk_window_set_composited (GdkWindow *window,
                           gboolean composited);

Sets a GdkWindow as composited, or unsets it. Composited windows do not automatically have their contents drawn to the screen. Drawing is redirected to an offscreen buffer and an expose event is emitted on the parent of the composited window. It is the responsibility of the parent's expose handler to manually merge the off-screen content onto the screen in whatever way it sees fit. See Example 7, “Composited windows” for an example.

It only makes sense for child windows to be composited; see gdk_window_set_opacity() if you need translucent toplevel windows.

An additional effect of this call is that the area of this window is no longer clipped from regions marked for invalidation on its parent. Draws done on the parent window are also no longer clipped by the child.

This call is only supported on some systems (currently, only X11 with new enough Xcomposite and Xdamage extensions). You must call gdk_display_supports_composite() to check if setting a window as composited is supported before attempting to do so.

Parameters

window

a GdkWindow

 

composited

TRUE to set the window as composited

 

Since: 2.12


gdk_window_get_composited ()

gboolean
gdk_window_get_composited (GdkWindow *window);

Determines whether window is composited.

See gdk_window_set_composited().

Parameters

window

a GdkWindow

 

Returns

TRUE if the window is composited.

Since: 2.22


gdk_window_move ()

void
gdk_window_move (GdkWindow *window,
                 gint x,
                 gint y);

Repositions a window relative to its parent window. For toplevel windows, window managers may ignore or modify the move; you should probably use gtk_window_move() on a GtkWindow widget anyway, instead of using GDK functions. For child windows, the move will reliably succeed.

If you're also planning to resize the window, use gdk_window_move_resize() to both move and resize simultaneously, for a nicer visual effect.

Parameters

window

a GdkWindow

 

x

X coordinate relative to window's parent

 

y

Y coordinate relative to window's parent

 

gdk_window_resize ()

void
gdk_window_resize (GdkWindow *window,
                   gint width,
                   gint height);

Resizes window ; for toplevel windows, asks the window manager to resize the window. The window manager may not allow the resize. When using GTK+, use gtk_window_resize() instead of this low-level GDK function.

Windows may not be resized below 1x1.

If you're also planning to move the window, use gdk_window_move_resize() to both move and resize simultaneously, for a nicer visual effect.

Parameters

window

a GdkWindow

 

width

new width of the window

 

height

new height of the window

 

gdk_window_move_resize ()

void
gdk_window_move_resize (GdkWindow *window,
                        gint x,
                        gint y,
                        gint width,
                        gint height);

Equivalent to calling gdk_window_move() and gdk_window_resize(), except that both operations are performed at once, avoiding strange visual effects. (i.e. the user may be able to see the window first move, then resize, if you don't use gdk_window_move_resize().)

Parameters

window

a GdkWindow

 

x

new X position relative to window's parent

 

y

new Y position relative to window's parent

 

width

new width

 

height

new height

 

gdk_window_scroll ()

void
gdk_window_scroll (GdkWindow *window,
                   gint dx,
                   gint dy);

Scroll the contents of its window, both pixels and children, by the given amount. Portions of the window that the scroll operation brings in from offscreen areas are invalidated.

Parameters

window

a GdkWindow

 

dx

Amount to scroll in the X direction

 

dy

Amount to scroll in the Y direction

 

gdk_window_move_region ()

void
gdk_window_move_region (GdkWindow *window,
                        const GdkRegion *region,
                        gint dx,
                        gint dy);

Move the part of window indicated by region by dy pixels in the Y direction and dx pixels in the X direction. The portions of region that not covered by the new position of region are invalidated.

Child windows are not moved.

Parameters

window

a GdkWindow

 

region

The GdkRegion to move

 

dx

Amount to move in the X direction

 

dy

Amount to move in the Y direction

 

Since: 2.8


gdk_window_flush ()

void
gdk_window_flush (GdkWindow *window);

Flush all outstanding cached operations on a window, leaving the window in a state which reflects all that has been drawn before.

Gdk uses multiple kinds of caching to get better performance and nicer drawing. For instance, during exposes all paints to a window using double buffered rendering are keep on a pixmap until the last window has been exposed. It also delays window moves/scrolls until as long as possible until next update to avoid tearing when moving windows.

Normally this should be completely invisible to applications, as we automatically flush the windows when required, but this might be needed if you for instance mix direct native drawing with gdk drawing. For Gtk widgets that don't use double buffering this will be called automatically before sending the expose event.

Parameters

window

a GdkWindow

 

Since: 2.18


gdk_window_has_native ()

gboolean
gdk_window_has_native (GdkWindow *window);

Checks whether the window has a native window or not. Note that you can use gdk_window_ensure_native() if a native window is needed.

Parameters

window

a GdkWindow

 

Returns

TRUE if the window has a native window, FALSE otherwise.

Since: 2.22


gdk_window_ensure_native ()

gboolean
gdk_window_ensure_native (GdkWindow *window);

Tries to ensure that there is a window-system native window for this GdkWindow. This may fail in some situations, returning FALSE.

Offscreen window and children of them can never have native windows.

Some backends may not support native child windows.

Parameters

window

a GdkWindow

 

Returns

TRUE if the window has a native window, FALSE otherwise

Since: 2.18


gdk_window_reparent ()

void
gdk_window_reparent (GdkWindow *window,
                     GdkWindow *new_parent,
                     gint x,
                     gint y);

Reparents window into the given new_parent . The window being reparented will be unmapped as a side effect.

Parameters

window

a GdkWindow

 

new_parent

new parent to move window into

 

x

X location inside the new parent

 

y

Y location inside the new parent

 

gdk_window_clear ()

void
gdk_window_clear (GdkWindow *window);

Clears an entire window to the background color or background pixmap.

Parameters

window

a GdkWindow

 

gdk_window_clear_area ()

void
gdk_window_clear_area (GdkWindow *window,
                       gint x,
                       gint y,
                       gint width,
                       gint height);

Clears an area of window to the background color or background pixmap.

Parameters

window

a GdkWindow

 

x

x coordinate of rectangle to clear

 

y

y coordinate of rectangle to clear

 

width

width of rectangle to clear

 

height

height of rectangle to clear

 

gdk_window_clear_area_e ()

void
gdk_window_clear_area_e (GdkWindow *window,
                         gint x,
                         gint y,
                         gint width,
                         gint height);

Like gdk_window_clear_area(), but also generates an expose event for the cleared area.

This function has a stupid name because it dates back to the mists time, pre-GDK-1.0.

Parameters

window

a GdkWindow

 

x

x coordinate of rectangle to clear

 

y

y coordinate of rectangle to clear

 

width

width of rectangle to clear

 

height

height of rectangle to clear

 

gdk_window_copy_area()

#define             gdk_window_copy_area(drawable,gc,x,y,source_drawable,source_x,source_y,width,height)

gdk_window_copy_area is deprecated and should not be used in newly-written code.

Deprecated equivalent to gdk_draw_drawable(), see that function for docs

Parameters

drawable

a GdkDrawable

 

gc

a GdkGC sharing the drawable's visual and colormap

 

x

X position in drawable where the rectangle should be drawn

 

y

Y position in drawable where the rectangle should be drawn

 

source_drawable

the source GdkDrawable, which may be the same as drawable

 

source_x

X position in src of rectangle to draw

 

source_y

Y position in src of rectangle to draw

 

width

width of rectangle to draw, or -1 for entire src width

 

height

height of rectangle to draw, or -1 for entire src height

 

gdk_window_raise ()

void
gdk_window_raise (GdkWindow *window);

Raises window to the top of the Z-order (stacking order), so that other windows with the same parent window appear below window . This is true whether or not the windows are visible.

If window is a toplevel, the window manager may choose to deny the request to move the window in the Z-order, gdk_window_raise() only requests the restack, does not guarantee it.

Parameters

window

a GdkWindow

 

gdk_window_lower ()

void
gdk_window_lower (GdkWindow *window);

Lowers window to the bottom of the Z-order (stacking order), so that other windows with the same parent window appear above window . This is true whether or not the other windows are visible.

If window is a toplevel, the window manager may choose to deny the request to move the window in the Z-order, gdk_window_lower() only requests the restack, does not guarantee it.

Note that gdk_window_show() raises the window again, so don't call this function before gdk_window_show(). (Try gdk_window_show_unraised().)

Parameters

window

a GdkWindow

 

gdk_window_restack ()

void
gdk_window_restack (GdkWindow *window,
                    GdkWindow *sibling,
                    gboolean above);

Changes the position of window in the Z-order (stacking order), so that it is above sibling (if above is TRUE) or below sibling (if above is FALSE).

If sibling is NULL, then this either raises (if above is TRUE) or lowers the window.

If window is a toplevel, the window manager may choose to deny the request to move the window in the Z-order, gdk_window_restack() only requests the restack, does not guarantee it.

Parameters

window

a GdkWindow

 

sibling

a GdkWindow that is a sibling of window , or NULL.

[allow-none]

above

a boolean

 

Since: 2.18


gdk_window_focus ()

void
gdk_window_focus (GdkWindow *window,
                  guint32 timestamp);

Sets keyboard focus to window . In most cases, gtk_window_present() should be used on a GtkWindow, rather than calling this function.

Parameters

window

a GdkWindow

 

timestamp

timestamp of the event triggering the window focus

 

gdk_window_register_dnd ()

void
gdk_window_register_dnd (GdkWindow *window);

Registers a window as a potential drop destination.

Parameters

window

a GdkWindow.

 

gdk_window_begin_resize_drag ()

void
gdk_window_begin_resize_drag (GdkWindow *window,
                              GdkWindowEdge edge,
                              gint button,
                              gint root_x,
                              gint root_y,
                              guint32 timestamp);

Begins a window resize operation (for a toplevel window). You might use this function to implement a "window resize grip," for example; in fact GtkStatusbar uses it. The function works best with window managers that support the Extended Window Manager Hints, but has a fallback implementation for other window managers.

Parameters

window

a toplevel GdkWindow

 

edge

the edge or corner from which the drag is started

 

button

the button being used to drag

 

root_x

root window X coordinate of mouse click that began the drag

 

root_y

root window Y coordinate of mouse click that began the drag

 

timestamp

timestamp of mouse click that began the drag (use gdk_event_get_time())

 

gdk_window_begin_move_drag ()

void
gdk_window_begin_move_drag (GdkWindow *window,
                            gint button,
                            gint root_x,
                            gint root_y,
                            guint32 timestamp);

Begins a window move operation (for a toplevel window). You might use this function to implement a "window move grip," for example. The function works best with window managers that support the Extended Window Manager Hints, but has a fallback implementation for other window managers.

Parameters

window

a toplevel GdkWindow

 

button

the button being used to drag

 

root_x

root window X coordinate of mouse click that began the drag

 

root_y

root window Y coordinate of mouse click that began the drag

 

timestamp

timestamp of mouse click that began the drag

 

gdk_window_constrain_size ()

void
gdk_window_constrain_size (GdkGeometry *geometry,
                           guint flags,
                           gint width,
                           gint height,
                           gint *new_width,
                           gint *new_height);

Constrains a desired width and height according to a set of geometry hints (such as minimum and maximum size).

Parameters

geometry

a GdkGeometry structure

 

flags

a mask indicating what portions of geometry are set

 

width

desired width of window

 

height

desired height of the window

 

new_width

location to store resulting width.

[out]

new_height

location to store resulting height.

[out]

gdk_window_beep ()

void
gdk_window_beep (GdkWindow *window);

Emits a short beep associated to window in the appropriate display, if supported. Otherwise, emits a short beep on the display just as gdk_display_beep().

Parameters

window

a toplevel GdkWindow

 

Since: 2.12


gdk_window_begin_paint_rect ()

void
gdk_window_begin_paint_rect (GdkWindow *window,
                             const GdkRectangle *rectangle);

A convenience wrapper around gdk_window_begin_paint_region() which creates a rectangular region for you. See gdk_window_begin_paint_region() for details.

Parameters

window

a GdkWindow

 

rectangle

rectangle you intend to draw to

 

gdk_window_begin_paint_region ()

void
gdk_window_begin_paint_region (GdkWindow *window,
                               const GdkRegion *region);

Indicates that you are beginning the process of redrawing region . A backing store (offscreen buffer) large enough to contain region will be created. The backing store will be initialized with the background color or background pixmap for window . Then, all drawing operations performed on window will be diverted to the backing store. When you call gdk_window_end_paint(), the backing store will be copied to window , making it visible onscreen. Only the part of window contained in region will be modified; that is, drawing operations are clipped to region .

The net result of all this is to remove flicker, because the user sees the finished product appear all at once when you call gdk_window_end_paint(). If you draw to window directly without calling gdk_window_begin_paint_region(), the user may see flicker as individual drawing operations are performed in sequence. The clipping and background-initializing features of gdk_window_begin_paint_region() are conveniences for the programmer, so you can avoid doing that work yourself.

When using GTK+, the widget system automatically places calls to gdk_window_begin_paint_region() and gdk_window_end_paint() around emissions of the expose_event signal. That is, if you're writing an expose event handler, you can assume that the exposed area in GdkEventExpose has already been cleared to the window background, is already set as the clip region, and already has a backing store. Therefore in most cases, application code need not call gdk_window_begin_paint_region(). (You can disable the automatic calls around expose events on a widget-by-widget basis by calling gtk_widget_set_double_buffered().)

If you call this function multiple times before calling the matching gdk_window_end_paint(), the backing stores are pushed onto a stack. gdk_window_end_paint() copies the topmost backing store onscreen, subtracts the topmost region from all other regions in the stack, and pops the stack. All drawing operations affect only the topmost backing store in the stack. One matching call to gdk_window_end_paint() is required for each call to gdk_window_begin_paint_region().

Parameters

window

a GdkWindow

 

region

region you intend to draw to

 

gdk_window_end_paint ()

void
gdk_window_end_paint (GdkWindow *window);

Indicates that the backing store created by the most recent call to gdk_window_begin_paint_region() should be copied onscreen and deleted, leaving the next-most-recent backing store or no backing store at all as the active paint region. See gdk_window_begin_paint_region() for full details. It is an error to call this function without a matching gdk_window_begin_paint_region() first.

Parameters

window

a GdkWindow

 

gdk_window_invalidate_rect ()

void
gdk_window_invalidate_rect (GdkWindow *window,
                            const GdkRectangle *rect,
                            gboolean invalidate_children);

A convenience wrapper around gdk_window_invalidate_region() which invalidates a rectangular region. See gdk_window_invalidate_region() for details.

Parameters

window

a GdkWindow

 

rect

rectangle to invalidate or NULL to invalidate the whole window.

[allow-none]

invalidate_children

whether to also invalidate child windows

 

gdk_window_invalidate_region ()

void
gdk_window_invalidate_region (GdkWindow *window,
                              const GdkRegion *region,
                              gboolean invalidate_children);

Adds region to the update area for window . The update area is the region that needs to be redrawn, or "dirty region." The call gdk_window_process_updates() sends one or more expose events to the window, which together cover the entire update area. An application would normally redraw the contents of window in response to those expose events.

GDK will call gdk_window_process_all_updates() on your behalf whenever your program returns to the main loop and becomes idle, so normally there's no need to do that manually, you just need to invalidate regions that you know should be redrawn.

The invalidate_children parameter controls whether the region of each child window that intersects region will also be invalidated. If FALSE, then the update area for child windows will remain unaffected. See gdk_window_invalidate_maybe_recurse if you need fine grained control over which children are invalidated.

Parameters

window

a GdkWindow

 

region

a GdkRegion

 

invalidate_children

TRUE to also invalidate child windows

 

gdk_window_invalidate_maybe_recurse ()

void
gdk_window_invalidate_maybe_recurse (GdkWindow *window,
                                     const GdkRegion *region,
                                     gboolean (*child_func) (GdkWindow *, gpointer),
                                     gpointer user_data);

Adds region to the update area for window . The update area is the region that needs to be redrawn, or "dirty region." The call gdk_window_process_updates() sends one or more expose events to the window, which together cover the entire update area. An application would normally redraw the contents of window in response to those expose events.

GDK will call gdk_window_process_all_updates() on your behalf whenever your program returns to the main loop and becomes idle, so normally there's no need to do that manually, you just need to invalidate regions that you know should be redrawn.

The child_func parameter controls whether the region of each child window that intersects region will also be invalidated. Only children for which child_func returns TRUE will have the area invalidated.

Parameters

window

a GdkWindow

 

region

a GdkRegion

 

child_func

function to use to decide if to recurse to a child, NULL means never recurse.

 

user_data

data passed to child_func

 

gdk_window_get_update_area ()

GdkRegion *
gdk_window_get_update_area (GdkWindow *window);

Transfers ownership of the update area from window to the caller of the function. That is, after calling this function, window will no longer have an invalid/dirty region; the update area is removed from window and handed to you. If a window has no update area, gdk_window_get_update_area() returns NULL. You are responsible for calling gdk_region_destroy() on the returned region if it's non-NULL.

Parameters

window

a GdkWindow

 

Returns

the update area for window


gdk_window_freeze_updates ()

void
gdk_window_freeze_updates (GdkWindow *window);

Temporarily freezes a window such that it won't receive expose events. The window will begin receiving expose events again when gdk_window_thaw_updates() is called. If gdk_window_freeze_updates() has been called more than once, gdk_window_thaw_updates() must be called an equal number of times to begin processing exposes.

Parameters

window

a GdkWindow

 

gdk_window_thaw_updates ()

void
gdk_window_thaw_updates (GdkWindow *window);

Thaws a window frozen with gdk_window_freeze_updates().

Parameters

window

a GdkWindow

 

gdk_window_process_all_updates ()

void
gdk_window_process_all_updates (void);

Calls gdk_window_process_updates() for all windows (see GdkWindow) in the application.


gdk_window_process_updates ()

void
gdk_window_process_updates (GdkWindow *window,
                            gboolean update_children);

Sends one or more expose events to window . The areas in each expose event will cover the entire update area for the window (see gdk_window_invalidate_region() for details). Normally GDK calls gdk_window_process_all_updates() on your behalf, so there's no need to call this function unless you want to force expose events to be delivered immediately and synchronously (vs. the usual case, where GDK delivers them in an idle handler). Occasionally this is useful to produce nicer scrolling behavior, for example.

Parameters

window

a GdkWindow

 

update_children

whether to also process updates for child windows

 

gdk_window_set_debug_updates ()

void
gdk_window_set_debug_updates (gboolean setting);

With update debugging enabled, calls to gdk_window_invalidate_region() clear the invalidated region of the screen to a noticeable color, and GDK pauses for a short time before sending exposes to windows during gdk_window_process_updates(). The net effect is that you can see the invalid region for each window and watch redraws as they occur. This allows you to diagnose inefficiencies in your application.

In essence, because the GDK rendering model prevents all flicker, if you are redrawing the same region 400 times you may never notice, aside from noticing a speed problem. Enabling update debugging causes GTK to flicker slowly and noticeably, so you can see exactly what's being redrawn when, in what order.

The --gtk-debug=updates command line option passed to GTK+ programs enables this debug option at application startup time. That's usually more useful than calling gdk_window_set_debug_updates() yourself, though you might want to use this function to enable updates sometime after application startup time.

Parameters

setting

TRUE to turn on update debugging

 

gdk_window_get_internal_paint_info ()

void
gdk_window_get_internal_paint_info (GdkWindow *window,
                                    GdkDrawable **real_drawable,
                                    gint *x_offset,
                                    gint *y_offset);

If you bypass the GDK layer and use windowing system primitives to draw directly onto a GdkWindow, then you need to deal with two details: there may be an offset between GDK coordinates and windowing system coordinates, and GDK may have redirected drawing to a offscreen pixmap as the result of a gdk_window_begin_paint_region() calls. This function allows retrieving the information you need to compensate for these effects.

This function exposes details of the GDK implementation, and is thus likely to change in future releases of GDK.

Parameters

window

a GdkWindow

 

real_drawable

location to store the drawable to which drawing should be done.

[out]

x_offset

location to store the X offset between coordinates in window , and the underlying window system primitive coordinates for *real_drawable .

[out]

y_offset

location to store the Y offset between coordinates in window , and the underlying window system primitive coordinates for *real_drawable .

[out]

gdk_window_enable_synchronized_configure ()

void
gdk_window_enable_synchronized_configure
                               (GdkWindow *window);

Indicates that the application will cooperate with the window system in synchronizing the window repaint with the window manager during resizing operations. After an application calls this function, it must call gdk_window_configure_finished() every time it has finished all processing associated with a set of Configure events. Toplevel GTK+ windows automatically use this protocol.

On X, calling this function makes window participate in the _NET_WM_SYNC_REQUEST window manager protocol.

Parameters

window

a toplevel GdkWindow

 

Since: 2.6


gdk_window_configure_finished ()

void
gdk_window_configure_finished (GdkWindow *window);

Signal to the window system that the application has finished handling Configure events it has received. Window Managers can use this to better synchronize the frame repaint with the application. GTK+ applications will automatically call this function when appropriate.

This function can only be called if gdk_window_enable_synchronized_configure() was called previously.

Parameters

window

a toplevel GdkWindow

 

Since: 2.6


gdk_window_set_user_data ()

void
gdk_window_set_user_data (GdkWindow *window,
                          gpointer user_data);

For most purposes this function is deprecated in favor of g_object_set_data(). However, for historical reasons GTK+ stores the GtkWidget that owns a GdkWindow as user data on the GdkWindow. So, custom widget implementations should use this function for that. If GTK+ receives an event for a GdkWindow, and the user data for the window is non-NULL, GTK+ will assume the user data is a GtkWidget, and forward the event to that widget.

Parameters

window

a GdkWindow

 

user_data

user data

 

gdk_window_set_override_redirect ()

void
gdk_window_set_override_redirect (GdkWindow *window,
                                  gboolean override_redirect);

An override redirect window is not under the control of the window manager. This means it won't have a titlebar, won't be minimizable, etc. - it will be entirely under the control of the application. The window manager can't see the override redirect window at all.

Override redirect should only be used for short-lived temporary windows, such as popup menus. GtkMenu uses an override redirect window in its implementation, for example.

Parameters

window

a toplevel GdkWindow

 

override_redirect

TRUE if window should be override redirect

 

gdk_window_set_accept_focus ()

void
gdk_window_set_accept_focus (GdkWindow *window,
                             gboolean accept_focus);

Setting accept_focus to FALSE hints the desktop environment that the window doesn't want to receive input focus.

On X, it is the responsibility of the window manager to interpret this hint. ICCCM-compliant window manager usually respect it.

Parameters

window

a toplevel GdkWindow

 

accept_focus

TRUE if the window should receive input focus

 

Since: 2.4


gdk_window_get_accept_focus ()

gboolean
gdk_window_get_accept_focus (GdkWindow *window);

Determines whether or not the desktop environment shuld be hinted that the window does not want to receive input focus.

Parameters

window

a toplevel GdkWindow.

 

Returns

whether or not the window should receive input focus.

Since: 2.22


gdk_window_set_focus_on_map ()

void
gdk_window_set_focus_on_map (GdkWindow *window,
                             gboolean focus_on_map);

Setting focus_on_map to FALSE hints the desktop environment that the window doesn't want to receive input focus when it is mapped. focus_on_map should be turned off for windows that aren't triggered interactively (such as popups from network activity).

On X, it is the responsibility of the window manager to interpret this hint. Window managers following the freedesktop.org window manager extension specification should respect it.

Parameters

window

a toplevel GdkWindow

 

focus_on_map

TRUE if the window should receive input focus when mapped

 

Since: 2.6


gdk_window_get_focus_on_map ()

gboolean
gdk_window_get_focus_on_map (GdkWindow *window);

Determines whether or not the desktop environment should be hinted that the window does not want to receive input focus when it is mapped.

Parameters

window

a toplevel GdkWindow.

 

Returns

whether or not the window wants to receive input focus when it is mapped.

Since: 2.22


gdk_window_add_filter ()

void
gdk_window_add_filter (GdkWindow *window,
                       GdkFilterFunc function,
                       gpointer data);

Adds an event filter to window , allowing you to intercept events before they reach GDK. This is a low-level operation and makes it easy to break GDK and/or GTK+, so you have to know what you're doing. Pass NULL for window to get all events for all windows, instead of events for a specific window.

See gdk_display_add_client_message_filter() if you are interested in X ClientMessage events.

Parameters

window

a GdkWindow

 

function

filter callback

 

data

data to pass to filter callback

 

gdk_window_remove_filter ()

void
gdk_window_remove_filter (GdkWindow *window,
                          GdkFilterFunc function,
                          gpointer data);

Remove a filter previously added with gdk_window_add_filter().

Parameters

window

a GdkWindow

 

function

previously-added filter function

 

data

user data for previously-added filter function

 

GdkFilterFunc ()

GdkFilterReturn
(*GdkFilterFunc) (GdkXEvent *xevent,
                  GdkEvent *event,
                  gpointer data);

Specifies the type of function used to filter native events before they are converted to GDK events.

When a filter is called, event is unpopulated, except for event->window. The filter may translate the native event to a GDK event and store the result in event, or handle it without translation. If the filter translates the event and processing should continue, it should return GDK_FILTER_TRANSLATE.

Parameters

xevent

the native event to filter.

 

event

the GDK event to which the X event will be translated.

 

data

user data set when the filter was installed.

 

Returns

a GdkFilterReturn value.


gdk_window_shape_combine_mask ()

void
gdk_window_shape_combine_mask (GdkWindow *window,
                               GdkBitmap *mask,
                               gint x,
                               gint y);

Applies a shape mask to window . Pixels in window corresponding to set bits in the mask will be visible; pixels in window corresponding to unset bits in the mask will be transparent. This gives a non-rectangular window.

If mask is NULL, the shape mask will be unset, and the x /y parameters are not used.

On the X11 platform, this uses an X server extension which is widely available on most common platforms, but not available on very old X servers, and occasionally the implementation will be buggy. On servers without the shape extension, this function will do nothing.

This function works on both toplevel and child windows.

Parameters

window

a GdkWindow

 

mask

shape mask

 

x

X position of shape mask with respect to window

 

y

Y position of shape mask with respect to window

 

gdk_window_shape_combine_region ()

void
gdk_window_shape_combine_region (GdkWindow *window,
                                 const GdkRegion *shape_region,
                                 gint offset_x,
                                 gint offset_y);

Makes pixels in window outside shape_region be transparent, so that the window may be nonrectangular. See also gdk_window_shape_combine_mask() to use a bitmap as the mask.

If shape_region is NULL, the shape will be unset, so the whole window will be opaque again. offset_x and offset_y are ignored if shape_region is NULL.

On the X11 platform, this uses an X server extension which is widely available on most common platforms, but not available on very old X servers, and occasionally the implementation will be buggy. On servers without the shape extension, this function will do nothing.

This function works on both toplevel and child windows.

Parameters

window

a GdkWindow

 

shape_region

region of window to be non-transparent

 

offset_x

X position of shape_region in window coordinates

 

offset_y

Y position of shape_region in window coordinates

 

gdk_window_set_child_shapes ()

void
gdk_window_set_child_shapes (GdkWindow *window);

Sets the shape mask of window to the union of shape masks for all children of window , ignoring the shape mask of window itself. Contrast with gdk_window_merge_child_shapes() which includes the shape mask of window in the masks to be merged.

Parameters

window

a GdkWindow

 

gdk_window_merge_child_shapes ()

void
gdk_window_merge_child_shapes (GdkWindow *window);

Merges the shape masks for any child windows into the shape mask for window . i.e. the union of all masks for window and its children will become the new mask for window . See gdk_window_shape_combine_mask().

This function is distinct from gdk_window_set_child_shapes() because it includes window 's shape mask in the set of shapes to be merged.

Parameters

window

a GdkWindow

 

gdk_window_input_shape_combine_mask ()

void
gdk_window_input_shape_combine_mask (GdkWindow *window,
                                     GdkBitmap *mask,
                                     gint x,
                                     gint y);

Like gdk_window_shape_combine_mask(), but the shape applies only to event handling. Mouse events which happen while the pointer position corresponds to an unset bit in the mask will be passed on the window below window .

An input shape is typically used with RGBA windows. The alpha channel of the window defines which pixels are invisible and allows for nicely antialiased borders, and the input shape controls where the window is "clickable".

On the X11 platform, this requires version 1.1 of the shape extension.

On the Win32 platform, this functionality is not present and the function does nothing.

Parameters

window

a GdkWindow

 

mask

shape mask, or NULL.

[allow-none]

x

X position of shape mask with respect to window

 

y

Y position of shape mask with respect to window

 

Since: 2.10


gdk_window_input_shape_combine_region ()

void
gdk_window_input_shape_combine_region (GdkWindow *window,
                                       const GdkRegion *shape_region,
                                       gint offset_x,
                                       gint offset_y);

Like gdk_window_shape_combine_region(), but the shape applies only to event handling. Mouse events which happen while the pointer position corresponds to an unset bit in the mask will be passed on the window below window .

An input shape is typically used with RGBA windows. The alpha channel of the window defines which pixels are invisible and allows for nicely antialiased borders, and the input shape controls where the window is "clickable".

On the X11 platform, this requires version 1.1 of the shape extension.

On the Win32 platform, this functionality is not present and the function does nothing.

Parameters

window

a GdkWindow

 

shape_region

region of window to be non-transparent

 

offset_x

X position of shape_region in window coordinates

 

offset_y

Y position of shape_region in window coordinates

 

Since: 2.10


gdk_window_set_child_input_shapes ()

void
gdk_window_set_child_input_shapes (GdkWindow *window);

Sets the input shape mask of window to the union of input shape masks for all children of window , ignoring the input shape mask of window itself. Contrast with gdk_window_merge_child_input_shapes() which includes the input shape mask of window in the masks to be merged.

Parameters

window

a GdkWindow

 

Since: 2.10


gdk_window_merge_child_input_shapes ()

void
gdk_window_merge_child_input_shapes (GdkWindow *window);

Merges the input shape masks for any child windows into the input shape mask for window . i.e. the union of all input masks for window and its children will become the new input mask for window . See gdk_window_input_shape_combine_mask().

This function is distinct from gdk_window_set_child_input_shapes() because it includes window 's input shape mask in the set of shapes to be merged.

Parameters

window

a GdkWindow

 

Since: 2.10


gdk_window_set_static_gravities ()

gboolean
gdk_window_set_static_gravities (GdkWindow *window,
                                 gboolean use_static);

Set the bit gravity of the given window to static, and flag it so all children get static subwindow gravity. This is used if you are implementing scary features that involve deep knowledge of the windowing system. Don't worry about it unless you have to.

Parameters

window

a GdkWindow

 

use_static

TRUE to turn on static gravity

 

Returns

TRUE if the server supports static gravity


gdk_window_set_hints ()

void
gdk_window_set_hints (GdkWindow *window,
                      gint x,
                      gint y,
                      gint min_width,
                      gint min_height,
                      gint max_width,
                      gint max_height,
                      gint flags);

gdk_window_set_hints is deprecated and should not be used in newly-written code.

This function is broken and useless and you should ignore it. If using GTK+, use functions such as gtk_window_resize(), gtk_window_set_size_request(), gtk_window_move(), gtk_window_parse_geometry(), and gtk_window_set_geometry_hints(), depending on what you're trying to do.

If using GDK directly, use gdk_window_set_geometry_hints().

Parameters

window

a GdkWindow

 

x

ignored field, does not matter

 

y

ignored field, does not matter

 

min_width

minimum width hint

 

min_height

minimum height hint

 

max_width

max width hint

 

max_height

max height hint

 

flags

logical OR of GDK_HINT_POS, GDK_HINT_MIN_SIZE, and/or GDK_HINT_MAX_SIZE

 

gdk_window_set_title ()

void
gdk_window_set_title (GdkWindow *window,
                      const gchar *title);

Sets the title of a toplevel window, to be displayed in the titlebar. If you haven't explicitly set the icon name for the window (using gdk_window_set_icon_name()), the icon name will be set to title as well. title must be in UTF-8 encoding (as with all user-readable strings in GDK/GTK+). title may not be NULL.

Parameters

window

a toplevel GdkWindow

 

title

title of window

 

gdk_window_set_background ()

void
gdk_window_set_background (GdkWindow *window,
                           const GdkColor *color);

Sets the background color of window . (However, when using GTK+, set the background of a widget with gtk_widget_modify_bg() - if you're an application - or gtk_style_set_background() - if you're implementing a custom widget.)

The color must be allocated; gdk_rgb_find_color() is the best way to allocate a color.

See also gdk_window_set_back_pixmap().

Parameters

window

a GdkWindow

 

color

an allocated GdkColor

 

gdk_window_set_back_pixmap ()

void
gdk_window_set_back_pixmap (GdkWindow *window,
                            GdkPixmap *pixmap,
                            gboolean parent_relative);

Sets the background pixmap of window . May also be used to set a background of "None" on window , by setting a background pixmap of NULL.

A background pixmap will be tiled, positioning the first tile at the origin of window , or if parent_relative is TRUE, the tiling will be done based on the origin of the parent window (useful to align tiles in a parent with tiles in a child).

A background pixmap of NULL means that the window will have no background. A window with no background will never have its background filled by the windowing system, instead the window will contain whatever pixels were already in the corresponding area of the display.

The windowing system will normally fill a window with its background when the window is obscured then exposed, and when you call gdk_window_clear().

Parameters

window

a GdkWindow

 

pixmap

a GdkPixmap, or NULL.

[allow-none]

parent_relative

whether the tiling origin is at the origin of window 's parent

 

gdk_window_get_background_pattern ()

cairo_pattern_t *
gdk_window_get_background_pattern (GdkWindow *window);

Gets the pattern used to clear the background on window . If window does not have its own background and reuses the parent's, NULL is returned and you'll have to query it yourself.

Parameters

window

a window

 

Returns

The pattern to use for the background or NULL to use the parent's background.

[transfer none]

Since: 2.22


gdk_window_set_cursor ()

void
gdk_window_set_cursor (GdkWindow *window,
                       GdkCursor *cursor);

Sets the mouse pointer for a GdkWindow. Use gdk_cursor_new_for_display() or gdk_cursor_new_from_pixmap() to create the cursor. To make the cursor invisible, use GDK_BLANK_CURSOR. Passing NULL for the cursor argument to gdk_window_set_cursor() means that window will use the cursor of its parent window. Most windows should use this default.

Parameters

window

a GdkWindow

 

cursor

a cursor.

[allow-none]

gdk_window_get_cursor ()

GdkCursor *
gdk_window_get_cursor (GdkWindow *window);

Retrieves a GdkCursor pointer for the cursor currently set on the specified GdkWindow, or NULL. If the return value is NULL then there is no custom cursor set on the specified window, and it is using the cursor for its parent window.

Parameters

window

a GdkWindow

 

Returns

a GdkCursor, or NULL. The returned object is owned by the GdkWindow and should not be unreferenced directly. Use gdk_window_set_cursor() to unset the cursor of the window.

[transfer none]

Since: 2.18


gdk_window_get_user_data ()

void
gdk_window_get_user_data (GdkWindow *window,
                          gpointer *data);

Retrieves the user data for window , which is normally the widget that window belongs to. See gdk_window_set_user_data().

Parameters

window

a GdkWindow

 

data

return location for user data.

[out]

gdk_window_get_geometry ()

void
gdk_window_get_geometry (GdkWindow *window,
                         gint *x,
                         gint *y,
                         gint *width,
                         gint *height,
                         gint *depth);

Any of the return location arguments to this function may be NULL, if you aren't interested in getting the value of that field.

The X and Y coordinates returned are relative to the parent window of window , which for toplevels usually means relative to the window decorations (titlebar, etc.) rather than relative to the root window (screen-size background window).

On the X11 platform, the geometry is obtained from the X server, so reflects the latest position of window ; this may be out-of-sync with the position of window delivered in the most-recently-processed GdkEventConfigure. gdk_window_get_position() in contrast gets the position from the most recent configure event.

If window is not a toplevel, it is much better to call gdk_window_get_position() and gdk_drawable_get_size() instead, because it avoids the roundtrip to the X server and because gdk_drawable_get_size() supports the full 32-bit coordinate space, whereas gdk_window_get_geometry() is restricted to the 16-bit coordinates of X11.

Parameters

window

a GdkWindow

 

x

return location for X coordinate of window (relative to its parent)

 

y

return location for Y coordinate of window (relative to its parent)

 

width

return location for width of window

 

height

return location for height of window

 

depth

return location for bit depth of window

 

gdk_window_set_geometry_hints ()

void
gdk_window_set_geometry_hints (GdkWindow *window,
                               const GdkGeometry *geometry,
                               GdkWindowHints geom_mask);

Sets the geometry hints for window . Hints flagged in geom_mask are set, hints not flagged in geom_mask are unset. To unset all hints, use a geom_mask of 0 and a geometry of NULL.

This function provides hints to the windowing system about acceptable sizes for a toplevel window. The purpose of this is to constrain user resizing, but the windowing system will typically (but is not required to) also constrain the current size of the window to the provided values and constrain programatic resizing via gdk_window_resize() or gdk_window_move_resize().

Note that on X11, this effect has no effect on windows of type GDK_WINDOW_TEMP or windows where override redirect has been turned on via gdk_window_set_override_redirect() since these windows are not resizable by the user.

Since you can't count on the windowing system doing the constraints for programmatic resizes, you should generally call gdk_window_constrain_size() yourself to determine appropriate sizes.

Parameters

window

a toplevel GdkWindow

 

geometry

geometry hints

 

geom_mask

bitmask indicating fields of geometry to pay attention to

 

gdk_window_set_icon_list ()

void
gdk_window_set_icon_list (GdkWindow *window,
                          GList *pixbufs);

Sets a list of icons for the window. One of these will be used to represent the window when it has been iconified. The icon is usually shown in an icon box or some sort of task bar. Which icon size is shown depends on the window manager. The window manager can scale the icon but setting several size icons can give better image quality since the window manager may only need to scale the icon by a small amount or not at all.

Parameters

window

The GdkWindow toplevel window to set the icon of.

 

pixbufs

A list of pixbufs, of different sizes.

[transfer none][element-type GdkPixbuf]

gdk_window_set_modal_hint ()

void
gdk_window_set_modal_hint (GdkWindow *window,
                           gboolean modal);

The application can use this hint to tell the window manager that a certain window has modal behaviour. The window manager can use this information to handle modal windows in a special way.

You should only use this on windows for which you have previously called gdk_window_set_transient_for()

Parameters

window

A toplevel GdkWindow

 

modal

TRUE if the window is modal, FALSE otherwise.

 

gdk_window_get_modal_hint ()

gboolean
gdk_window_get_modal_hint (GdkWindow *window);

Determines whether or not the window manager is hinted that window has modal behaviour.

Parameters

window

A toplevel GdkWindow.

 

Returns

whether or not the window has the modal hint set.

Since: 2.22


gdk_window_set_type_hint ()

void
gdk_window_set_type_hint (GdkWindow *window,
                          GdkWindowTypeHint hint);

The application can use this call to provide a hint to the window manager about the functionality of a window. The window manager can use this information when determining the decoration and behaviour of the window.

The hint must be set before the window is mapped.

Parameters

window

A toplevel GdkWindow

 

hint

A hint of the function this window will have

 

gdk_window_get_type_hint ()

GdkWindowTypeHint
gdk_window_get_type_hint (GdkWindow *window);

This function returns the type hint set for a window.

Parameters

window

A toplevel GdkWindow

 

Returns

The type hint set for window

Since: 2.10


gdk_window_set_skip_taskbar_hint ()

void
gdk_window_set_skip_taskbar_hint (GdkWindow *window,
                                  gboolean skips_taskbar);

Toggles whether a window should appear in a task list or window list. If a window's semantic type as specified with gdk_window_set_type_hint() already fully describes the window, this function should not be called in addition, instead you should allow the window to be treated according to standard policy for its semantic type.

Parameters

window

a toplevel GdkWindow

 

skips_taskbar

TRUE to skip the taskbar

 

Since: 2.2


gdk_window_set_skip_pager_hint ()

void
gdk_window_set_skip_pager_hint (GdkWindow *window,
                                gboolean skips_pager);

Toggles whether a window should appear in a pager (workspace switcher, or other desktop utility program that displays a small thumbnail representation of the windows on the desktop). If a window's semantic type as specified with gdk_window_set_type_hint() already fully describes the window, this function should not be called in addition, instead you should allow the window to be treated according to standard policy for its semantic type.

Parameters

window

a toplevel GdkWindow

 

skips_pager

TRUE to skip the pager

 

Since: 2.2


gdk_window_set_urgency_hint ()

void
gdk_window_set_urgency_hint (GdkWindow *window,
                             gboolean urgent);

Toggles whether a window needs the user's urgent attention.

Parameters

window

a toplevel GdkWindow

 

urgent

TRUE if the window is urgent

 

Since: 2.8


gdk_window_get_position ()

void
gdk_window_get_position (GdkWindow *window,
                         gint *x,
                         gint *y);

Obtains the position of the window as reported in the most-recently-processed GdkEventConfigure. Contrast with gdk_window_get_geometry() which queries the X server for the current window position, regardless of which events have been received or processed.

The position coordinates are relative to the window's parent window.

Parameters

window

a GdkWindow

 

x

X coordinate of window.

[out][allow-none]

y

Y coordinate of window.

[out][allow-none]

gdk_window_get_root_origin ()

void
gdk_window_get_root_origin (GdkWindow *window,
                            gint *x,
                            gint *y);

Obtains the top-left corner of the window manager frame in root window coordinates.

Parameters

window

a toplevel GdkWindow

 

x

return location for X position of window frame

 

y

return location for Y position of window frame

 

gdk_window_get_frame_extents ()

void
gdk_window_get_frame_extents (GdkWindow *window,
                              GdkRectangle *rect);

Obtains the bounding box of the window, including window manager titlebar/borders if any. The frame position is given in root window coordinates. To get the position of the window itself (rather than the frame) in root window coordinates, use gdk_window_get_origin().

Parameters

window

a toplevel GdkWindow

 

rect

rectangle to fill with bounding box of the window frame

 

gdk_window_get_origin ()

gint
gdk_window_get_origin (GdkWindow *window,
                       gint *x,
                       gint *y);

Obtains the position of a window in root window coordinates. (Compare with gdk_window_get_position() and gdk_window_get_geometry() which return the position of a window relative to its parent window.)

Parameters

window

a GdkWindow

 

x

return location for X coordinate

 

y

return location for Y coordinate

 

Returns

not meaningful, ignore


gdk_window_get_deskrelative_origin ()

gboolean
gdk_window_get_deskrelative_origin (GdkWindow *window,
                                    gint *x,
                                    gint *y);

gdk_window_get_deskrelative_origin is deprecated and should not be used in newly-written code.

This gets the origin of a GdkWindow relative to an Enlightenment-window-manager desktop. As long as you don't assume that the user's desktop/workspace covers the entire root window (i.e. you don't assume that the desktop begins at root window coordinate 0,0) this function is not necessary. It's deprecated for that reason.

Parameters

window

a toplevel GdkWindow

 

x

return location for X coordinate

 

y

return location for Y coordinate

 

Returns

not meaningful


gdk_window_get_root_coords ()

void
gdk_window_get_root_coords (GdkWindow *window,
                            gint x,
                            gint y,
                            gint *root_x,
                            gint *root_y);

Obtains the position of a window position in root window coordinates. This is similar to gdk_window_get_origin() but allows you go pass in any position in the window, not just the origin.

Parameters

window

a GdkWindow

 

x

X coordinate in window

 

y

Y coordinate in window

 

root_x

return location for X coordinate.

[out]

root_y

return location for Y coordinate.

[out]

Since: 2.18


gdk_window_coords_from_parent ()

void
gdk_window_coords_from_parent (GdkWindow *window,
                               gdouble parent_x,
                               gdouble parent_y,
                               gdouble *x,
                               gdouble *y);

Transforms window coordinates from a parent window to a child window, where the parent window is the normal parent as returned by gdk_window_get_parent() for normal windows, and the window's embedder as returned by gdk_offscreen_window_get_embedder() for offscreen windows.

For normal windows, calling this function is equivalent to subtracting the return values of gdk_window_get_position() from the parent coordinates. For offscreen windows however (which can be arbitrarily transformed), this function calls the GdkWindow::from-embedder: signal to translate the coordinates.

You should always use this function when writing generic code that walks down a window hierarchy.

See also: gdk_window_coords_to_parent()

Parameters

window

a child window

 

parent_x

X coordinate in parent's coordinate system

 

parent_y

Y coordinate in parent's coordinate system

 

x

return location for X coordinate in child's coordinate system.

[out][allow-none]

y

return location for Y coordinate in child's coordinate system.

[out][allow-none]

Since: 2.22


gdk_window_coords_to_parent ()

void
gdk_window_coords_to_parent (GdkWindow *window,
                             gdouble x,
                             gdouble y,
                             gdouble *parent_x,
                             gdouble *parent_y);

Transforms window coordinates from a child window to its parent window, where the parent window is the normal parent as returned by gdk_window_get_parent() for normal windows, and the window's embedder as returned by gdk_offscreen_window_get_embedder() for offscreen windows.

For normal windows, calling this function is equivalent to adding the return values of gdk_window_get_position() to the child coordinates. For offscreen windows however (which can be arbitrarily transformed), this function calls the GdkWindow::to-embedder: signal to translate the coordinates.

You should always use this function when writing generic code that walks up a window hierarchy.

See also: gdk_window_coords_from_parent()

Parameters

window

a child window

 

x

X coordinate in child's coordinate system

 

y

Y coordinate in child's coordinate system

 

parent_x

return location for X coordinate in parent's coordinate system, or NULL.

[out][allow-none]

parent_y

return location for Y coordinate in parent's coordinate system, or NULL.

[out][allow-none]

Since: 2.22


gdk_window_get_pointer ()

GdkWindow *
gdk_window_get_pointer (GdkWindow *window,
                        gint *x,
                        gint *y,
                        GdkModifierType *mask);

Obtains the current pointer position and modifier state. The position is given in coordinates relative to the upper left corner of window .

Parameters

window

a GdkWindow

 

x

return location for X coordinate of pointer or NULL to not return the X coordinate.

[out][allow-none]

y

return location for Y coordinate of pointer or NULL to not return the Y coordinate.

[out][allow-none]

mask

return location for modifier mask or NULL to not return the modifier mask.

[out][allow-none]

Returns

the window containing the pointer (as with gdk_window_at_pointer()), or NULL if the window containing the pointer isn't known to GDK.

[transfer none]


gdk_window_get_parent ()

GdkWindow *
gdk_window_get_parent (GdkWindow *window);

Obtains the parent of window , as known to GDK. Does not query the X server; thus this returns the parent as passed to gdk_window_new(), not the actual parent. This should never matter unless you're using Xlib calls mixed with GDK calls on the X11 platform. It may also matter for toplevel windows, because the window manager may choose to reparent them.

Note that you should use gdk_window_get_effective_parent() when writing generic code that walks up a window hierarchy, because gdk_window_get_parent() will most likely not do what you expect if there are offscreen windows in the hierarchy.

Parameters

window

a GdkWindow

 

Returns

parent of window


gdk_window_get_effective_parent ()

GdkWindow *
gdk_window_get_effective_parent (GdkWindow *window);

Obtains the parent of window , as known to GDK. Works like gdk_window_get_parent() for normal windows, but returns the window's embedder for offscreen windows.

See also: gdk_offscreen_window_get_embedder()

Parameters

window

a GdkWindow

 

Returns

effective parent of window

Since: 2.22


gdk_window_get_toplevel ()

GdkWindow *
gdk_window_get_toplevel (GdkWindow *window);

Gets the toplevel window that's an ancestor of window .

Any window type but GDK_WINDOW_CHILD is considered a toplevel window, as is a GDK_WINDOW_CHILD window that has a root window as parent.

Note that you should use gdk_window_get_effective_toplevel() when you want to get to a window's toplevel as seen on screen, because gdk_window_get_toplevel() will most likely not do what you expect if there are offscreen windows in the hierarchy.

Parameters

window

a GdkWindow

 

Returns

the toplevel window containing window


gdk_window_get_effective_toplevel ()

GdkWindow *
gdk_window_get_effective_toplevel (GdkWindow *window);

Gets the toplevel window that's an ancestor of window .

Works like gdk_window_get_toplevel(), but treats an offscreen window's embedder as its parent, using gdk_window_get_effective_parent().

See also: gdk_offscreen_window_get_embedder()

Parameters

window

a GdkWindow

 

Returns

the effective toplevel window containing window

Since: 2.22


gdk_window_get_children ()

GList *
gdk_window_get_children (GdkWindow *window);

Gets the list of children of window known to GDK. This function only returns children created via GDK, so for example it's useless when used with the root window; it only returns windows an application created itself.

The returned list must be freed, but the elements in the list need not be.

Parameters

window

a GdkWindow

 

Returns

list of child windows inside window .

[transfer container][element-type GdkWindow]


gdk_window_peek_children ()

GList *
gdk_window_peek_children (GdkWindow *window);

Like gdk_window_get_children(), but does not copy the list of children, so the list does not need to be freed.

Parameters

window

a GdkWindow

 

Returns

a reference to the list of child windows in window .

[transfer none][element-type GdkWindow]


gdk_window_get_events ()

GdkEventMask
gdk_window_get_events (GdkWindow *window);

Gets the event mask for window . See gdk_window_set_events().

Parameters

window

a GdkWindow

 

Returns

event mask for window


gdk_window_set_events ()

void
gdk_window_set_events (GdkWindow *window,
                       GdkEventMask event_mask);

The event mask for a window determines which events will be reported for that window. For example, an event mask including GDK_BUTTON_PRESS_MASK means the window should report button press events. The event mask is the bitwise OR of values from the GdkEventMask enumeration.

Parameters

window

a GdkWindow

 

event_mask

event mask for window

 

gdk_window_set_icon ()

void
gdk_window_set_icon (GdkWindow *window,
                     GdkWindow *icon_window,
                     GdkPixmap *pixmap,
                     GdkBitmap *mask);

Sets the icon of window as a pixmap or window. If using GTK+, investigate gtk_window_set_default_icon_list() first, and then gtk_window_set_icon_list() and gtk_window_set_icon(). If those don't meet your needs, look at gdk_window_set_icon_list(). Only if all those are too high-level do you want to fall back to gdk_window_set_icon().

Parameters

window

a toplevel GdkWindow

 

icon_window

a GdkWindow to use for the icon, or NULL to unset

 

pixmap

a GdkPixmap to use as the icon, or NULL to unset

 

mask

a 1-bit pixmap (GdkBitmap) to use as mask for pixmap , or NULL to have none

 

gdk_window_set_icon_name ()

void
gdk_window_set_icon_name (GdkWindow *window,
                          const gchar *name);

Windows may have a name used while minimized, distinct from the name they display in their titlebar. Most of the time this is a bad idea from a user interface standpoint. But you can set such a name with this function, if you like.

After calling this with a non-NULL name , calls to gdk_window_set_title() will not update the icon title.

Using NULL for name unsets the icon title; further calls to gdk_window_set_title() will again update the icon title as well.

Parameters

window

a toplevel GdkWindow

 

name

name of window while iconified (minimized)

 

gdk_window_set_transient_for ()

void
gdk_window_set_transient_for (GdkWindow *window,
                              GdkWindow *parent);

Indicates to the window manager that window is a transient dialog associated with the application window parent . This allows the window manager to do things like center window on parent and keep window above parent .

See gtk_window_set_transient_for() if you're using GtkWindow or GtkDialog.

Parameters

window

a toplevel GdkWindow

 

parent

another toplevel GdkWindow

 

gdk_window_set_role ()

void
gdk_window_set_role (GdkWindow *window,
                     const gchar *role);

When using GTK+, typically you should use gtk_window_set_role() instead of this low-level function.

The window manager and session manager use a window's role to distinguish it from other kinds of window in the same application. When an application is restarted after being saved in a previous session, all windows with the same title and role are treated as interchangeable. So if you have two windows with the same title that should be distinguished for session management purposes, you should set the role on those windows. It doesn't matter what string you use for the role, as long as you have a different role for each non-interchangeable kind of window.

Parameters

window

a toplevel GdkWindow

 

role

a string indicating its role

 

gdk_window_set_startup_id ()

void
gdk_window_set_startup_id (GdkWindow *window,
                           const gchar *startup_id);

When using GTK+, typically you should use gtk_window_set_startup_id() instead of this low-level function.

Parameters

window

a toplevel GdkWindow

 

startup_id

a string with startup-notification identifier

 

Since: 2.12


gdk_window_set_group ()

void
gdk_window_set_group (GdkWindow *window,
                      GdkWindow *leader);

Sets the group leader window for window . By default, GDK sets the group leader for all toplevel windows to a global window implicitly created by GDK. With this function you can override this default.

The group leader window allows the window manager to distinguish all windows that belong to a single application. It may for example allow users to minimize/unminimize all windows belonging to an application at once. You should only set a non-default group window if your application pretends to be multiple applications.

Parameters

window

a toplevel GdkWindow

 

leader

group leader window, or NULL to restore the default group leader window

 

gdk_window_get_group ()

GdkWindow *
gdk_window_get_group (GdkWindow *window);

Returns the group leader window for window . See gdk_window_set_group().

Parameters

window

a toplevel GdkWindow

 

Returns

the group leader window for window

Since: 2.4


gdk_window_set_decorations ()

void
gdk_window_set_decorations (GdkWindow *window,
                            GdkWMDecoration decorations);

"Decorations" are the features the window manager adds to a toplevel GdkWindow. This function sets the traditional Motif window manager hints that tell the window manager which decorations you would like your window to have. Usually you should use gtk_window_set_decorated() on a GtkWindow instead of using the GDK function directly.

The decorations argument is the logical OR of the fields in the GdkWMDecoration enumeration. If GDK_DECOR_ALL is included in the mask, the other bits indicate which decorations should be turned off. If GDK_DECOR_ALL is not included, then the other bits indicate which decorations should be turned on.

Most window managers honor a decorations hint of 0 to disable all decorations, but very few honor all possible combinations of bits.

Parameters

window

a toplevel GdkWindow

 

decorations

decoration hint mask

 

gdk_window_get_decorations ()

gboolean
gdk_window_get_decorations (GdkWindow *window,
                            GdkWMDecoration *decorations);

Returns the decorations set on the GdkWindow with gdk_window_set_decorations

Parameters

window

The toplevel GdkWindow to get the decorations from

 

decorations

The window decorations will be written here

 

Returns

TRUE if the window has decorations set, FALSE otherwise.


gdk_window_set_functions ()

void
gdk_window_set_functions (GdkWindow *window,
                          GdkWMFunction functions);

Sets hints about the window management functions to make available via buttons on the window frame.

On the X backend, this function sets the traditional Motif window manager hint for this purpose. However, few window managers do anything reliable or interesting with this hint. Many ignore it entirely.

The functions argument is the logical OR of values from the GdkWMFunction enumeration. If the bitmask includes GDK_FUNC_ALL, then the other bits indicate which functions to disable; if it doesn't include GDK_FUNC_ALL, it indicates which functions to enable.

Parameters

window

a toplevel GdkWindow

 

functions

bitmask of operations to allow on window

 

gdk_window_get_toplevels ()

GList *
gdk_window_get_toplevels (void);

gdk_window_get_toplevels has been deprecated since version 2.16 and should not be used in newly-written code.

Use gdk_screen_get_toplevel_windows() instead.

Obtains a list of all toplevel windows known to GDK on the default screen (see gdk_screen_get_toplevel_windows()). A toplevel window is a child of the root window (see gdk_get_default_root_window()).

The returned list should be freed with g_list_free(), but its elements need not be freed.

Returns

list of toplevel windows, free with g_list_free()


gdk_get_default_root_window ()

GdkWindow *
gdk_get_default_root_window (void);

Obtains the root window (parent all other windows are inside) for the default display and screen.

Returns

the default root window


gdk_set_pointer_hooks ()

GdkPointerHooks *
gdk_set_pointer_hooks (const GdkPointerHooks *new_hooks);

gdk_set_pointer_hooks has been deprecated since version 2.24 and should not be used in newly-written code.

This function will go away in GTK 3 for lack of use cases.

This function allows for hooking into the operation of getting the current location of the pointer. This is only useful for such low-level tools as an event recorder. Applications should never have any reason to use this facility.

This function is not multihead safe. For multihead operation, see gdk_display_set_pointer_hooks().

Parameters

new_hooks

a table of pointers to functions for getting quantities related to the current pointer position, or NULL to restore the default table.

 

Returns

the previous pointer hook table


gdk_offscreen_window_get_pixmap ()

GdkPixmap *
gdk_offscreen_window_get_pixmap (GdkWindow *window);

Gets the offscreen pixmap that an offscreen window renders into. If you need to keep this around over window resizes, you need to add a reference to it.

Parameters

window

a GdkWindow

 

Returns

The offscreen pixmap, or NULL if not offscreen

Since: 2.18


gdk_offscreen_window_set_embedder ()

void
gdk_offscreen_window_set_embedder (GdkWindow *window,
                                   GdkWindow *embedder);

Sets window to be embedded in embedder .

To fully embed an offscreen window, in addition to calling this function, it is also necessary to handle the “pick-embedded-child” signal on the embedder and the “to-embedder” and “from-embedder” signals on window .

Parameters

window

a GdkWindow

 

embedder

the GdkWindow that window gets embedded in

 

Since: 2.18


gdk_offscreen_window_get_embedder ()

GdkWindow *
gdk_offscreen_window_get_embedder (GdkWindow *window);

Gets the window that window is embedded in.

Parameters

window

a GdkWindow

 

Returns

the embedding GdkWindow, or NULL if window is not an embedded offscreen window

Since: 2.18


gdk_window_geometry_changed ()

void
gdk_window_geometry_changed (GdkWindow *window);

This function informs GDK that the geometry of an embedded offscreen window has changed. This is necessary for GDK to keep track of which offscreen window the pointer is in.

Parameters

window

an embedded offscreen GdkWindow

 

Since: 2.18


gdk_window_redirect_to_drawable ()

void
gdk_window_redirect_to_drawable (GdkWindow *window,
                                 GdkDrawable *drawable,
                                 gint src_x,
                                 gint src_y,
                                 gint dest_x,
                                 gint dest_y,
                                 gint width,
                                 gint height);

Redirects drawing into window so that drawing to the window in the rectangle specified by src_x , src_y , width and height is also drawn into drawable at dest_x , dest_y .

Only drawing between gdk_window_begin_paint_region() or gdk_window_begin_paint_rect() and gdk_window_end_paint() is redirected.

Redirection is active until gdk_window_remove_redirection() is called.

Parameters

window

a GdkWindow

 

drawable

a GdkDrawable

 

src_x

x position in window

 

src_y

y position in window

 

dest_x

x position in drawable

 

dest_y

y position in drawable

 

width

width of redirection, or -1 to use the width of window

 

height

height of redirection or -1 to use the height of window

 

Since: 2.14


gdk_window_remove_redirection ()

void
gdk_window_remove_redirection (GdkWindow *window);

Removes any active redirection started by gdk_window_redirect_to_drawable().

Parameters

window

a GdkWindow

 

Since: 2.14

Types and Values

GdkWindow

typedef struct _GdkDrawable           GdkWindow;

An opaque structure representing an onscreen drawable. Pointers to structures of type GdkPixmap, GdkBitmap, and GdkWindow, can often be used interchangeably. The type GdkDrawable refers generically to any of these types.


enum GdkWindowType

Describes the kind of window.

Members

GDK_WINDOW_ROOT

root window; this window has no parent, covers the entire screen, and is created by the window system

 

GDK_WINDOW_TOPLEVEL

toplevel window (used to implement GtkWindow)

 

GDK_WINDOW_CHILD

child window (used to implement e.g. GtkEntry)

 

GDK_WINDOW_DIALOG

useless/deprecated compatibility type

 

GDK_WINDOW_TEMP

override redirect temporary window (used to implement GtkMenu)

 

GDK_WINDOW_FOREIGN

foreign window (see gdk_window_foreign_new())

 

GDK_WINDOW_OFFSCREEN

offscreen window (see the section called “Offscreen Windows”). Since 2.18

 

enum GdkWindowClass

GDK_INPUT_OUTPUT windows are the standard kind of window you might expect. GDK_INPUT_ONLY windows are invisible; they are used to trap events, but you can't draw on them.

Members

GDK_INPUT_OUTPUT

window for graphics and events

 

GDK_INPUT_ONLY

window for events only

 

enum GdkWindowHints

Used to indicate which fields of a GdkGeometry struct should be paid attention to. Also, the presence/absence of GDK_HINT_POS, GDK_HINT_USER_POS, and GDK_HINT_USER_SIZE is significant, though they don't directly refer to GdkGeometry fields. GDK_HINT_USER_POS will be set automatically by GtkWindow if you call gtk_window_move(). GDK_HINT_USER_POS and GDK_HINT_USER_SIZE should be set if the user specified a size/position using a --geometry command-line argument; gtk_window_parse_geometry() automatically sets these flags.

Members

GDK_HINT_POS

indicates that the program has positioned the window

 

GDK_HINT_MIN_SIZE

min size fields are set

 

GDK_HINT_MAX_SIZE

max size fields are set

 

GDK_HINT_BASE_SIZE

base size fields are set

 

GDK_HINT_ASPECT

aspect ratio fields are set

 

GDK_HINT_RESIZE_INC

resize increment fields are set

 

GDK_HINT_WIN_GRAVITY

window gravity field is set

 

GDK_HINT_USER_POS

indicates that the window's position was explicitly set by the user

 

GDK_HINT_USER_SIZE

indicates that the window's size was explicitly set by the user

 

struct GdkGeometry

struct GdkGeometry {
  gint min_width;
  gint min_height;
  gint max_width;
  gint max_height;
  gint base_width;
  gint base_height;
  gint width_inc;
  gint height_inc;
  gdouble min_aspect;
  gdouble max_aspect;
  GdkGravity win_gravity;
};

The GdkGeometry struct gives the window manager information about a window's geometry constraints. Normally you would set these on the GTK+ level using gtk_window_set_geometry_hints(). GtkWindow then sets the hints on the GdkWindow it creates.

gdk_window_set_geometry_hints() expects the hints to be fully valid already and simply passes them to the window manager; in contrast, gtk_window_set_geometry_hints() performs some interpretation. For example, GtkWindow will apply the hints to the geometry widget instead of the toplevel window, if you set a geometry widget. Also, the min_width/min_height/max_width/max_height fields may be set to -1, and GtkWindow will substitute the size request of the window or geometry widget. If the minimum size hint is not provided, GtkWindow will use its requisition as the minimum size. If the minimum size is provided and a geometry widget is set, GtkWindow will take the minimum size as the minimum size of the geometry widget rather than the entire window. The base size is treated similarly.

The canonical use-case for gtk_window_set_geometry_hints() is to get a terminal widget to resize properly. Here, the terminal text area should be the geometry widget; GtkWindow will then automatically set the base size to the size of other widgets in the terminal window, such as the menubar and scrollbar. Then, the width_inc and height_inc fields should be set to the size of one character in the terminal. Finally, the base size should be set to the size of one character. The net effect is that the minimum size of the terminal will have a 1x1 character terminal area, and only terminal sizes on the "character grid" will be allowed.

Here's an example of how the terminal example would be implemented, assuming a terminal area widget called "terminal" and a toplevel window "toplevel":

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GdkGeometry hints;
hints.base_width = terminal->char_width;
        hints.base_height = terminal->char_height;
        hints.min_width = terminal->char_width;
        hints.min_height = terminal->char_height;
        hints.width_inc = terminal->char_width;
        hints.height_inc = terminal->char_height;
gtk_window_set_geometry_hints (GTK_WINDOW (toplevel),
                   GTK_WIDGET (terminal),
                       &hints,
                   GDK_HINT_RESIZE_INC |
                                       GDK_HINT_MIN_SIZE |
                                       GDK_HINT_BASE_SIZE);

The other useful fields are the min_aspect and max_aspect fields; these contain a width/height ratio as a floating point number. If a geometry widget is set, the aspect applies to the geometry widget rather than the entire window. The most common use of these hints is probably to set min_aspect and max_aspect to the same value, thus forcing the window to keep a constant aspect ratio.

Members

gint min_width;

minimum width of window (or -1 to use requisition, with GtkWindow only)

 

gint min_height;

minimum height of window (or -1 to use requisition, with GtkWindow only)

 

gint max_width;

maximum width of window (or -1 to use requisition, with GtkWindow only)

 

gint max_height;

maximum height of window (or -1 to use requisition, with GtkWindow only)

 

gint base_width;

allowed window widths are base_width + width_inc * N where N is any integer (-1 allowed with GtkWindow)

 

gint base_height;

allowed window widths are base_height + height_inc * N where N is any integer (-1 allowed with GtkWindow)

 

gint width_inc;

width resize increment

 

gint height_inc;

height resize increment

 

gdouble min_aspect;

minimum width/height ratio

 

gdouble max_aspect;

maximum width/height ratio

 

GdkGravity win_gravity;

window gravity, see gtk_window_set_gravity()

 

enum GdkGravity

Defines the reference point of a window and the meaning of coordinates passed to gtk_window_move(). See gtk_window_move() and the "implementation notes" section of the Extended Window Manager Hints specification for more details.

Members

GDK_GRAVITY_NORTH_WEST

the reference point is at the top left corner.

 

GDK_GRAVITY_NORTH

the reference point is in the middle of the top edge.

 

GDK_GRAVITY_NORTH_EAST

the reference point is at the top right corner.

 

GDK_GRAVITY_WEST

the reference point is at the middle of the left edge.

 

GDK_GRAVITY_CENTER

the reference point is at the center of the window.

 

GDK_GRAVITY_EAST

the reference point is at the middle of the right edge.

 

GDK_GRAVITY_SOUTH_WEST

the reference point is at the lower left corner.

 

GDK_GRAVITY_SOUTH

the reference point is at the middle of the lower edge.

 

GDK_GRAVITY_SOUTH_EAST

the reference point is at the lower right corner.

 

GDK_GRAVITY_STATIC

the reference point is at the top left corner of the window itself, ignoring window manager decorations.

 

enum GdkWindowEdge

Determines a window edge or corner.

Members

GDK_WINDOW_EDGE_NORTH_WEST

the top left corner.

 

GDK_WINDOW_EDGE_NORTH

the top edge.

 

GDK_WINDOW_EDGE_NORTH_EAST

the top right corner.

 

GDK_WINDOW_EDGE_WEST

the left edge.

 

GDK_WINDOW_EDGE_EAST

the right edge.

 

GDK_WINDOW_EDGE_SOUTH_WEST

the lower left corner.

 

GDK_WINDOW_EDGE_SOUTH

the lower edge.

 

GDK_WINDOW_EDGE_SOUTH_EAST

the lower right corner.

 

enum GdkWindowTypeHint

These are hints for the window manager that indicate what type of function the window has. The window manager can use this when determining decoration and behaviour of the window. The hint must be set before mapping the window.

See the Extended Window Manager Hints specification for more details about window types.

Members

GDK_WINDOW_TYPE_HINT_NORMAL

Normal toplevel window.

 

GDK_WINDOW_TYPE_HINT_DIALOG

Dialog window.

 

GDK_WINDOW_TYPE_HINT_MENU

Window used to implement a menu; GTK+ uses this hint only for torn-off menus, see GtkTearoffMenuItem.

 

GDK_WINDOW_TYPE_HINT_TOOLBAR

Window used to implement toolbars.

 

GDK_WINDOW_TYPE_HINT_SPLASHSCREEN

Window used to display a splash screen during application startup.

 

GDK_WINDOW_TYPE_HINT_UTILITY

Utility windows which are not detached toolbars or dialogs.

 

GDK_WINDOW_TYPE_HINT_DOCK

Used for creating dock or panel windows.

 

GDK_WINDOW_TYPE_HINT_DESKTOP

Used for creating the desktop background window.

 

GDK_WINDOW_TYPE_HINT_DROPDOWN_MENU

A menu that belongs to a menubar.

 

GDK_WINDOW_TYPE_HINT_POPUP_MENU

A menu that does not belong to a menubar, e.g. a context menu.

 

GDK_WINDOW_TYPE_HINT_TOOLTIP

A tooltip.

 

GDK_WINDOW_TYPE_HINT_NOTIFICATION

A notification - typically a "bubble" that belongs to a status icon.

 

GDK_WINDOW_TYPE_HINT_COMBO

A popup from a combo box.

 

GDK_WINDOW_TYPE_HINT_DND

A window that is used to implement a DND cursor.

 

struct GdkWindowAttr

struct GdkWindowAttr {
  gchar *title;
  gint event_mask;
  gint x, y;
  gint width;
  gint height;
  GdkWindowClass wclass;
  GdkVisual *visual;
  GdkColormap *colormap;
  GdkWindowType window_type;
  GdkCursor *cursor;
  gchar *wmclass_name;
  gchar *wmclass_class;
  gboolean override_redirect;
  GdkWindowTypeHint type_hint;
};

Attributes to use for a newly-created window.

Members

gchar *title;

title of the window (for toplevel windows)

 

gint event_mask;

event mask (see gdk_window_set_events())

 

gint x;

X coordinate relative to parent window (see gdk_window_move())

 

gint y;

Y coordinate relative to parent window (see gdk_window_move())

 

gint width;

width of window

 

gint height;

height of window

 

GdkWindowClass wclass;

GDK_INPUT_OUTPUT (normal window) or GDK_INPUT_ONLY (invisible window that receives events)

 

GdkVisual *visual;

GdkVisual for window

 

GdkColormap *colormap;

GdkColormap for window

 

GdkWindowType window_type;

type of window

 

GdkCursor *cursor;

cursor for the window (see gdk_window_set_cursor())

 

gchar *wmclass_name;

don't use (see gtk_window_set_wmclass())

 

gchar *wmclass_class;

don't use (see gtk_window_set_wmclass())

 

gboolean override_redirect;

TRUE to bypass the window manager

 

GdkWindowTypeHint type_hint;

a hint of the function of the window

 

enum GdkWindowAttributesType

Used to indicate which fields in the GdkWindowAttr struct should be honored. For example, if you filled in the "cursor" and "x" fields of GdkWindowAttr, pass "GDK_WA_X | GDK_WA_CURSOR" to gdk_window_new(). Fields in GdkWindowAttr not covered by a bit in this enum are required; for example, the width/height, wclass, and window_type fields are required, they have no corresponding flag in GdkWindowAttributesType.

Members

GDK_WA_TITLE

Honor the title field

 

GDK_WA_X

Honor the X coordinate field

 

GDK_WA_Y

Honor the Y coordinate field

 

GDK_WA_CURSOR

Honor the cursor field

 

GDK_WA_COLORMAP

Honor the colormap field

 

GDK_WA_VISUAL

Honor the visual field

 

GDK_WA_WMCLASS

Honor the wmclass_class and wmclass_name fields

 

GDK_WA_NOREDIR

Honor the override_redirect field

 

GDK_WA_TYPE_HINT

Honor the type_hint field

 

gdk_window_ref

#define gdk_window_ref                 g_object_ref

gdk_window_ref is deprecated and should not be used in newly-written code.

Deprecated equivalent of g_object_ref()

Returns

the window


gdk_window_unref

#define gdk_window_unref               g_object_unref

gdk_window_unref is deprecated and should not be used in newly-written code.

Deprecated equivalent of g_object_unref()


enum GdkFilterReturn

Specifies the result of applying a GdkFilterFunc to a native event.

Members

GDK_FILTER_CONTINUE

event not handled, continue processing.

 

GDK_FILTER_TRANSLATE

native event translated into a GDK event and stored in the event structure that was passed in.

 

GDK_FILTER_REMOVE

event handled, terminate processing.

 

GdkXEvent

typedef void GdkXEvent;	  /* Can be cast to window system specific

Used to represent native events (XEvents for the X11 backend, MSGs for Win32).


GDK_PARENT_RELATIVE

#define GDK_PARENT_RELATIVE  1L

A special value for GdkPixmap* variables, indicating that the background pixmap for a window should be inherited from the parent window.


gdk_window_set_colormap

#define gdk_window_set_colormap        gdk_drawable_set_colormap

gdk_window_set_colormap is deprecated and should not be used in newly-written code.

Deprecated equivalent to gdk_drawable_set_colormap()


gdk_window_get_size

#define gdk_window_get_size            gdk_drawable_get_size

gdk_window_get_size is deprecated and should not be used in newly-written code.

Deprecated equivalent of gdk_drawable_get_size().


gdk_window_get_colormap

#define gdk_window_get_colormap        gdk_drawable_get_colormap

gdk_window_get_colormap is deprecated and should not be used in newly-written code.

Deprecated equivalent of gdk_drawable_get_colormap().

Returns

colormap for the window


gdk_window_get_type

#define gdk_window_get_type            gdk_window_get_window_type

gdk_window_get_type is deprecated and should not be used in newly-written code.

Deprecated equivalent of gdk_drawable_get_type().

Returns

type of drawable


enum GdkModifierType

A set of bit-flags to indicate the state of modifier keys and mouse buttons in various event types. Typical modifier keys are Shift, Control, Meta, Super, Hyper, Alt, Compose, Apple, CapsLock or ShiftLock.

Like the X Window System, GDK supports 8 modifier keys and 5 mouse buttons.

Since 2.10, GDK recognizes which of the Meta, Super or Hyper keys are mapped to Mod2 - Mod5, and indicates this by setting GDK_SUPER_MASK, GDK_HYPER_MASK or GDK_META_MASK in the state field of key events.

Members

GDK_SHIFT_MASK

the Shift key.

 

GDK_LOCK_MASK

a Lock key (depending on the modifier mapping of the X server this may either be CapsLock or ShiftLock).

 

GDK_CONTROL_MASK

the Control key.

 

GDK_MOD1_MASK

the fourth modifier key (it depends on the modifier mapping of the X server which key is interpreted as this modifier, but normally it is the Alt key).

 

GDK_MOD2_MASK

the fifth modifier key (it depends on the modifier mapping of the X server which key is interpreted as this modifier).

 

GDK_MOD3_MASK

the sixth modifier key (it depends on the modifier mapping of the X server which key is interpreted as this modifier).

 

GDK_MOD4_MASK

the seventh modifier key (it depends on the modifier mapping of the X server which key is interpreted as this modifier).

 

GDK_MOD5_MASK

the eighth modifier key (it depends on the modifier mapping of the X server which key is interpreted as this modifier).

 

GDK_BUTTON1_MASK

the first mouse button.

 

GDK_BUTTON2_MASK

the second mouse button.

 

GDK_BUTTON3_MASK

the third mouse button.

 

GDK_BUTTON4_MASK

the fourth mouse button.

 

GDK_BUTTON5_MASK

the fifth mouse button.

 

GDK_SUPER_MASK

the Super modifier. Since 2.10

 

GDK_HYPER_MASK

the Hyper modifier. Since 2.10

 

GDK_META_MASK

the Meta modifier. Since 2.10

 

GDK_RELEASE_MASK

not used in GDK itself. GTK+ uses it to differentiate between (keyval, modifiers) pairs from key press and release events.

 

GDK_MODIFIER_MASK

a mask covering all modifier types.

 

enum GdkWMDecoration

These are hints originally defined by the Motif toolkit. The window manager can use them when determining how to decorate the window. The hint must be set before mapping the window.

Members

GDK_DECOR_ALL

all decorations should be applied.

 

GDK_DECOR_BORDER

a frame should be drawn around the window.

 

GDK_DECOR_RESIZEH

the frame should have resize handles.

 

GDK_DECOR_TITLE

a titlebar should be placed above the window.

 

GDK_DECOR_MENU

a button for opening a menu should be included.

 

GDK_DECOR_MINIMIZE

a minimize button should be included.

 

GDK_DECOR_MAXIMIZE

a maximize button should be included.

 

enum GdkWMFunction

These are hints originally defined by the Motif toolkit. The window manager can use them when determining the functions to offer for the window. The hint must be set before mapping the window.

Members

GDK_FUNC_ALL

all functions should be offered.

 

GDK_FUNC_RESIZE

the window should be resizable.

 

GDK_FUNC_MOVE

the window should be movable.

 

GDK_FUNC_MINIMIZE

the window should be minimizable.

 

GDK_FUNC_MAXIMIZE

the window should be maximizable.

 

GDK_FUNC_CLOSE

the window should be closable.

 

struct GdkPointerHooks

struct GdkPointerHooks {
  GdkWindow* (*get_pointer)       (GdkWindow	   *window,
			           gint	           *x,
			           gint   	   *y,
			           GdkModifierType *mask);
  GdkWindow* (*window_at_pointer) (GdkScreen       *screen, /* unused */
                                   gint            *win_x,
                                   gint            *win_y);
};

A table of pointers to functions for getting quantities related to the current pointer position. GDK has one global table of this type, which can be set using gdk_set_pointer_hooks().

This is only useful for such low-level tools as an event recorder. Applications should never have any reason to use this facility

Members

get_pointer ()

Obtains the current pointer position and modifier state. The position is given in coordinates relative to the window containing the pointer, which is returned in window .

 

window_at_pointer ()

Obtains the window underneath the mouse pointer, returning the location of that window in win_x , win_y . Returns NULL if the window under the mouse pointer is not known to GDK (for example, belongs to another application).

 

Property Details

The “cursor” property

  “cursor”                   GdkCursor *

The mouse pointer for a GdkWindow. See gdk_window_set_cursor() and gdk_window_get_cursor() for details.

Flags: Read / Write

Since: 2.18

Signal Details

The “from-embedder” signal

void
user_function (GdkWindow *window,
               gdouble    embedder-x,
               gdouble    embedder-y,
               gpointer   offscreen-x,
               gpointer   offscreen-y,
               gpointer   user_data)

The ::from-embedder signal is emitted to translate coordinates in the embedder of an offscreen window to the offscreen window.

See also “to-embedder”.

Parameters

window

the offscreen window on which the signal is emitted

 

embedder-x

x coordinate in the embedder window

 

embedder-y

y coordinate in the embedder window

 

offscreen-x

return location for the x coordinate in the offscreen window.

[out][type double]

offscreen-y

return location for the y coordinate in the offscreen window.

[out][type double]

user_data

user data set when the signal handler was connected.

 

Flags: Run Last

Since: 2.18


The “pick-embedded-child” signal

GdkWindow*
user_function (GdkWindow *window,
               gdouble    x,
               gdouble    y,
               gpointer   user_data)

The ::pick-embedded-child signal is emitted to find an embedded child at the given position.

Parameters

window

the window on which the signal is emitted

 

x

x coordinate in the window

 

y

y coordinate in the window

 

user_data

user data set when the signal handler was connected.

 

Returns

the GdkWindow of the embedded child at x , y , or NULL.

[transfer none]

Flags: Run Last

Since: 2.18


The “to-embedder” signal

void
user_function (GdkWindow *window,
               gdouble    offscreen-x,
               gdouble    offscreen-y,
               gpointer   embedder-x,
               gpointer   embedder-y,
               gpointer   user_data)

The ::to-embedder signal is emitted to translate coordinates in an offscreen window to its embedder.

See also “from-embedder”.

Parameters

window

the offscreen window on which the signal is emitted

 

offscreen-x

x coordinate in the offscreen window

 

offscreen-y

y coordinate in the offscreen window

 

embedder-x

return location for the x coordinate in the embedder window.

[out][type double]

embedder-y

return location for the y coordinate in the embedder window.

[out][type double]

user_data

user data set when the signal handler was connected.

 

Flags: Run Last

Since: 2.18

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