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GtkStyleContext

GtkStyleContext — Rendering UI elements

Functions

GtkStyleContext * gtk_style_context_new ()
void gtk_style_context_add_provider ()
void gtk_style_context_add_provider_for_screen ()
void gtk_style_context_get ()
GtkTextDirection gtk_style_context_get_direction ()
GtkJunctionSides gtk_style_context_get_junction_sides ()
GtkStyleContext * gtk_style_context_get_parent ()
const GtkWidgetPath * gtk_style_context_get_path ()
void gtk_style_context_get_property ()
GdkScreen * gtk_style_context_get_screen ()
GdkFrameClock * gtk_style_context_get_frame_clock ()
GtkStateFlags gtk_style_context_get_state ()
void gtk_style_context_get_style ()
void gtk_style_context_get_style_property ()
void gtk_style_context_get_style_valist ()
void gtk_style_context_get_valist ()
GtkCssSection * gtk_style_context_get_section ()
void gtk_style_context_get_color ()
void gtk_style_context_get_background_color ()
void gtk_style_context_get_border_color ()
void gtk_style_context_get_border ()
void gtk_style_context_get_padding ()
void gtk_style_context_get_margin ()
const PangoFontDescription * gtk_style_context_get_font ()
void gtk_style_context_invalidate ()
gboolean gtk_style_context_state_is_running ()
gboolean gtk_style_context_lookup_color ()
GtkIconSet * gtk_style_context_lookup_icon_set ()
void gtk_style_context_notify_state_change ()
void gtk_style_context_pop_animatable_region ()
void gtk_style_context_push_animatable_region ()
void gtk_style_context_cancel_animations ()
void gtk_style_context_scroll_animations ()
void gtk_style_context_remove_provider ()
void gtk_style_context_remove_provider_for_screen ()
void gtk_style_context_reset_widgets ()
void gtk_style_context_set_background ()
void gtk_style_context_restore ()
void gtk_style_context_save ()
void gtk_style_context_set_direction ()
void gtk_style_context_set_junction_sides ()
void gtk_style_context_set_parent ()
void gtk_style_context_set_path ()
void gtk_style_context_add_class ()
void gtk_style_context_remove_class ()
gboolean gtk_style_context_has_class ()
GList * gtk_style_context_list_classes ()
void gtk_style_context_add_region ()
void gtk_style_context_remove_region ()
gboolean gtk_style_context_has_region ()
GList * gtk_style_context_list_regions ()
void gtk_style_context_set_screen ()
void gtk_style_context_set_frame_clock ()
void gtk_style_context_set_state ()
void gtk_style_context_set_scale ()
gint gtk_style_context_get_scale ()
GtkBorder * gtk_border_new ()
GtkBorder * gtk_border_copy ()
void gtk_border_free ()
void gtk_render_arrow ()
void gtk_render_background ()
void gtk_render_check ()
void gtk_render_expander ()
void gtk_render_extension ()
void gtk_render_focus ()
void gtk_render_frame ()
void gtk_render_frame_gap ()
void gtk_render_handle ()
void gtk_render_layout ()
void gtk_render_line ()
void gtk_render_option ()
void gtk_render_slider ()
void gtk_render_activity ()
GdkPixbuf * gtk_render_icon_pixbuf ()
void gtk_render_icon_surface ()
void gtk_render_icon ()
void gtk_render_insertion_cursor ()

Properties

GtkTextDirection direction Read / Write
GdkFrameClock * paint-clock Read / Write
GtkStyleContext * parent Read / Write
GdkScreen * screen Read / Write

Signals

void changed Run First

Types and Values

#define GTK_STYLE_PROPERTY_BACKGROUND_COLOR
#define GTK_STYLE_PROPERTY_COLOR
#define GTK_STYLE_PROPERTY_FONT
#define GTK_STYLE_PROPERTY_MARGIN
#define GTK_STYLE_PROPERTY_PADDING
#define GTK_STYLE_PROPERTY_BORDER_WIDTH
#define GTK_STYLE_PROPERTY_BORDER_RADIUS
#define GTK_STYLE_PROPERTY_BORDER_STYLE
#define GTK_STYLE_PROPERTY_BORDER_COLOR
#define GTK_STYLE_PROPERTY_BACKGROUND_IMAGE
#define GTK_STYLE_CLASS_BACKGROUND
#define GTK_STYLE_CLASS_BUTTON
#define GTK_STYLE_CLASS_CALENDAR
#define GTK_STYLE_CLASS_CELL
#define GTK_STYLE_CLASS_COMBOBOX_ENTRY
#define GTK_STYLE_CLASS_CHECK
#define GTK_STYLE_CLASS_DEFAULT
#define GTK_STYLE_CLASS_ENTRY
#define GTK_STYLE_CLASS_HEADER
#define GTK_STYLE_CLASS_MENU
#define GTK_STYLE_CLASS_RADIO
#define GTK_STYLE_CLASS_RUBBERBAND
#define GTK_STYLE_CLASS_SCROLLBAR
#define GTK_STYLE_CLASS_SCROLLBARS_JUNCTION
#define GTK_STYLE_CLASS_SLIDER
#define GTK_STYLE_CLASS_TOOLTIP
#define GTK_STYLE_CLASS_TROUGH
#define GTK_STYLE_CLASS_ACCELERATOR
#define GTK_STYLE_CLASS_DOCK
#define GTK_STYLE_CLASS_GRIP
#define GTK_STYLE_CLASS_MENUBAR
#define GTK_STYLE_CLASS_MENUITEM
#define GTK_STYLE_CLASS_PROGRESSBAR
#define GTK_STYLE_CLASS_SPINNER
#define GTK_STYLE_CLASS_TOOLBAR
#define GTK_STYLE_CLASS_PRIMARY_TOOLBAR
#define GTK_STYLE_CLASS_INLINE_TOOLBAR
#define GTK_STYLE_CLASS_PANE_SEPARATOR
#define GTK_STYLE_CLASS_SEPARATOR
#define GTK_STYLE_CLASS_SIDEBAR
#define GTK_STYLE_CLASS_DND
#define GTK_STYLE_CLASS_ERROR
#define GTK_STYLE_CLASS_EXPANDER
#define GTK_STYLE_CLASS_FRAME
#define GTK_STYLE_CLASS_HIGHLIGHT
#define GTK_STYLE_CLASS_IMAGE
#define GTK_STYLE_CLASS_INFO
#define GTK_STYLE_CLASS_MARK
#define GTK_STYLE_CLASS_NOTEBOOK
#define GTK_STYLE_CLASS_QUESTION
#define GTK_STYLE_CLASS_SCALE
#define GTK_STYLE_CLASS_SCALE_HAS_MARKS_ABOVE
#define GTK_STYLE_CLASS_SCALE_HAS_MARKS_BELOW
#define GTK_STYLE_CLASS_SPINBUTTON
#define GTK_STYLE_CLASS_VIEW
#define GTK_STYLE_CLASS_WARNING
#define GTK_STYLE_CLASS_HORIZONTAL
#define GTK_STYLE_CLASS_VERTICAL
#define GTK_STYLE_CLASS_TOP
#define GTK_STYLE_CLASS_BOTTOM
#define GTK_STYLE_CLASS_LEFT
#define GTK_STYLE_CLASS_RIGHT
#define GTK_STYLE_CLASS_LINKED
#define GTK_STYLE_CLASS_ARROW
#define GTK_STYLE_CLASS_OSD
#define GTK_STYLE_CLASS_LEVEL_BAR
#define GTK_STYLE_CLASS_CURSOR_HANDLE
#define GTK_STYLE_CLASS_INSERTION_CURSOR
#define GTK_STYLE_CLASS_TITLEBAR
#define GTK_STYLE_REGION_COLUMN
#define GTK_STYLE_REGION_COLUMN_HEADER
#define GTK_STYLE_REGION_ROW
#define GTK_STYLE_REGION_TAB
  GtkStyleContext
struct GtkBorder

Object Hierarchy

    GBoxed
    ╰── GtkBorder
    GObject
    ╰── GtkStyleContext

Includes

#include <gtk/gtk.h>

Description

GtkStyleContext is an object that stores styling information affecting a widget defined by GtkWidgetPath.

In order to construct the final style information, GtkStyleContext queries information from all attached GtkStyleProviders. Style providers can be either attached explicitly to the context through gtk_style_context_add_provider(), or to the screen through gtk_style_context_add_provider_for_screen(). The resulting style is a combination of all providers’ information in priority order.

For GTK+ widgets, any GtkStyleContext returned by gtk_widget_get_style_context() will already have a GtkWidgetPath, a GdkScreen and RTL/LTR information set. The style context will be also updated automatically if any of these settings change on the widget.

If you are using the theming layer standalone, you will need to set a widget path and a screen yourself to the created style context through gtk_style_context_set_path() and gtk_style_context_set_screen(), as well as updating the context yourself using gtk_style_context_invalidate() whenever any of the conditions change, such as a change in the “gtk-theme-name” setting or a hierarchy change in the rendered widget.

Transition Animations

GtkStyleContext has built-in support for state change transitions. Note that these animations respect the “gtk-enable-animations” setting.

For simple widgets where state changes affect the whole widget area, calling gtk_style_context_notify_state_change() with a NULL region is sufficient to trigger the transition animation. And GTK+ already does that when gtk_widget_set_state() or gtk_widget_set_state_flags() are called.

If a widget needs to declare several animatable regions (i.e. not affecting the whole widget area), its “draw” signal handler needs to wrap the render operations for the different regions with calls to gtk_style_context_push_animatable_region() and gtk_style_context_pop_animatable_region(). These functions take an identifier for the region which must be unique within the style context. For simple widgets with a fixed set of animatable regions, using an enumeration works well:

An example for Using an enumeration to identify animatable regions:

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enum {
  REGION_ENTRY,
  REGION_BUTTON_UP,
  REGION_BUTTON_DOWN
};

...

gboolean
spin_button_draw (GtkWidget *widget,
                  cairo_t   *cr)
{
  GtkStyleContext *context;

  context = gtk_widget_get_style_context (widget);

  gtk_style_context_push_animatable_region (context,
                                            GUINT_TO_POINTER (REGION_ENTRY));

  gtk_render_background (cr, 0, 0, 100, 30);
  gtk_render_frame (cr, 0, 0, 100, 30);

  gtk_style_context_pop_animatable_region (context);

  ...
}

For complex widgets with an arbitrary number of animatable regions, it is up to the implementation to come up with a way to uniquely identify each animatable region. Using pointers to internal structs is one way to achieve this:

An example for using struct pointers to identify animatable regions:

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void
notebook_draw_tab (GtkWidget    *widget,
                   NotebookPage *page,
                   cairo_t      *cr)
{
  gtk_style_context_push_animatable_region (context, page);
  gtk_render_extension (cr, page->x, page->y, page->width, page->height);
  gtk_style_context_pop_animatable_region (context);
}

The widget also needs to notify the style context about a state change for a given animatable region so the animation is triggered.

An example for triggering a state change animation on a region:

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gboolean
notebook_motion_notify (GtkWidget      *widget,
                        GdkEventMotion *event)
{
  GtkStyleContext *context;
  NotebookPage *page;

  context = gtk_widget_get_style_context (widget);
  page = find_page_under_pointer (widget, event);
  gtk_style_context_notify_state_change (context,
                                         gtk_widget_get_window (widget),
                                         page,
                                         GTK_STATE_PRELIGHT,
                                         TRUE);
  ...
}

gtk_style_context_notify_state_change() accepts NULL region IDs as a special value, in this case, the whole widget area will be updated by the animation.


Style Classes and Regions

Widgets can add style classes to their context, which can be used to associate different styles by class (see Selectors). Theme engines can also use style classes to vary their rendering.

Widgets can also add regions with flags to their context.

The regions used by GTK+ widgets are:

row

Used by GtkTreeView. Can be used with the flags: even, odd.

column

Used by GtkTreeView. Can be used with the flags: first, last, sorted.

column-header

Used by GtkTreeView.

tab

Used by GtkNotebook. Can be used with the flags: even, odd, first, last.


Custom styling in UI libraries and applications

If you are developing a library with custom GtkWidgets that render differently than standard components, you may need to add a GtkStyleProvider yourself with the GTK_STYLE_PROVIDER_PRIORITY_FALLBACK priority, either a GtkCssProvider or a custom object implementing the GtkStyleProvider interface. This way theming engines may still attempt to style your UI elements in a different way if needed so.

If you are using custom styling on an applications, you probably want then to make your style information prevail to the theme’s, so you must use a GtkStyleProvider with the GTK_STYLE_PROVIDER_PRIORITY_APPLICATION priority, keep in mind that the user settings in XDG_CONFIG_HOME/gtk-3.0/gtk.css will still take precedence over your changes, as it uses the GTK_STYLE_PROVIDER_PRIORITY_USER priority.

If a custom theming engine is needed, you probably want to implement a GtkStyleProvider yourself so it points to your GtkThemingEngine implementation, as GtkCssProvider uses gtk_theming_engine_load() which loads the theming engine module from the standard paths.

Functions

gtk_style_context_new ()

GtkStyleContext *
gtk_style_context_new (void);

Creates a standalone GtkStyleContext, this style context won’t be attached to any widget, so you may want to call gtk_style_context_set_path() yourself.

This function is only useful when using the theming layer separated from GTK+, if you are using GtkStyleContext to theme GtkWidgets, use gtk_widget_get_style_context() in order to get a style context ready to theme the widget.

Returns

A newly created GtkStyleContext.


gtk_style_context_add_provider ()

void
gtk_style_context_add_provider (GtkStyleContext *context,
                                GtkStyleProvider *provider,
                                guint priority);

Adds a style provider to context , to be used in style construction. Note that a style provider added by this function only affects the style of the widget to which context belongs. If you want to affect the style of all widgets, use gtk_style_context_add_provider_for_screen().

Note: If both priorities are the same, a GtkStyleProvider added through this function takes precedence over another added through gtk_style_context_add_provider_for_screen().

Parameters

context

a GtkStyleContext

 

provider

a GtkStyleProvider

 

priority

the priority of the style provider. The lower it is, the earlier it will be used in the style construction. Typically this will be in the range between GTK_STYLE_PROVIDER_PRIORITY_FALLBACK and GTK_STYLE_PROVIDER_PRIORITY_USER

 

Since 3.0


gtk_style_context_add_provider_for_screen ()

void
gtk_style_context_add_provider_for_screen
                               (GdkScreen *screen,
                                GtkStyleProvider *provider,
                                guint priority);

Adds a global style provider to screen , which will be used in style construction for all GtkStyleContexts under screen .

GTK+ uses this to make styling information from GtkSettings available.

Note: If both priorities are the same, A GtkStyleProvider added through gtk_style_context_add_provider() takes precedence over another added through this function.

Parameters

screen

a GdkScreen

 

provider

a GtkStyleProvider

 

priority

the priority of the style provider. The lower it is, the earlier it will be used in the style construction. Typically this will be in the range between GTK_STYLE_PROVIDER_PRIORITY_FALLBACK and GTK_STYLE_PROVIDER_PRIORITY_USER

 

Since 3.0


gtk_style_context_get ()

void
gtk_style_context_get (GtkStyleContext *context,
                       GtkStateFlags state,
                       ...);

Retrieves several style property values from context for a given state.

Parameters

context

a GtkStyleContext

 

state

state to retrieve the property values for

 

...

property name /return value pairs, followed by NULL

 

Since 3.0


gtk_style_context_get_direction ()

GtkTextDirection
gtk_style_context_get_direction (GtkStyleContext *context);

gtk_style_context_get_direction has been deprecated since version 3.8 and should not be used in newly-written code.

Use gtk_style_context_get_state() and check for GTK_STATE_FLAG_DIR_LTR and GTK_STATE_FLAG_DIR_RTL instead.

Returns the widget direction used for rendering.

Parameters

context

a GtkStyleContext

 

Returns

the widget direction

Since 3.0


gtk_style_context_get_junction_sides ()

GtkJunctionSides
gtk_style_context_get_junction_sides (GtkStyleContext *context);

Returns the sides where rendered elements connect visually with others.

Parameters

context

a GtkStyleContext

 

Returns

the junction sides

Since 3.0


gtk_style_context_get_parent ()

GtkStyleContext *
gtk_style_context_get_parent (GtkStyleContext *context);

Gets the parent context set via gtk_style_context_set_parent(). See that function for details.

Parameters

context

a GtkStyleContext

 

Returns

the parent context or NULL.

[transfer none]

Since 3.4


gtk_style_context_get_path ()

const GtkWidgetPath *
gtk_style_context_get_path (GtkStyleContext *context);

Returns the widget path used for style matching.

Parameters

context

a GtkStyleContext

 

Returns

A GtkWidgetPath.

[transfer none]

Since 3.0


gtk_style_context_get_property ()

void
gtk_style_context_get_property (GtkStyleContext *context,
                                const gchar *property,
                                GtkStateFlags state,
                                GValue *value);

Gets a style property from context for the given state.

When value is no longer needed, g_value_unset() must be called to free any allocated memory.

Parameters

context

a GtkStyleContext

 

property

style property name

 

state

state to retrieve the property value for

 

value

return location for the style property value.

[out][transfer full]

Since 3.0


gtk_style_context_get_screen ()

GdkScreen *
gtk_style_context_get_screen (GtkStyleContext *context);

Returns the GdkScreen to which context is attached.

Parameters

context

a GtkStyleContext

 

Returns

a GdkScreen.

[transfer none]


gtk_style_context_get_frame_clock ()

GdkFrameClock *
gtk_style_context_get_frame_clock (GtkStyleContext *context);

Returns the GdkFrameClock to which context is attached.

Parameters

context

a GtkStyleContext

 

Returns

a GdkFrameClock, or NULL if context does not have an attached frame clock.

[transfer none]

Since 3.8


gtk_style_context_get_state ()

GtkStateFlags
gtk_style_context_get_state (GtkStyleContext *context);

Returns the state used when rendering.

Parameters

context

a GtkStyleContext

 

Returns

the state flags

Since 3.0


gtk_style_context_get_style ()

void
gtk_style_context_get_style (GtkStyleContext *context,
                             ...);

Retrieves several widget style properties from context according to the current style.

Parameters

context

a GtkStyleContext

 

...

property name /return value pairs, followed by NULL

 

Since 3.0


gtk_style_context_get_style_property ()

void
gtk_style_context_get_style_property (GtkStyleContext *context,
                                      const gchar *property_name,
                                      GValue *value);

Gets the value for a widget style property.

When value is no longer needed, g_value_unset() must be called to free any allocated memory.

Parameters

context

a GtkStyleContext

 

property_name

the name of the widget style property

 

value

Return location for the property value

 

gtk_style_context_get_style_valist ()

void
gtk_style_context_get_style_valist (GtkStyleContext *context,
                                    va_list args);

Retrieves several widget style properties from context according to the current style.

Parameters

context

a GtkStyleContext

 

args

va_list of property name/return location pairs, followed by NULL

 

Since 3.0


gtk_style_context_get_valist ()

void
gtk_style_context_get_valist (GtkStyleContext *context,
                              GtkStateFlags state,
                              va_list args);

Retrieves several style property values from context for a given state.

Parameters

context

a GtkStyleContext

 

state

state to retrieve the property values for

 

args

va_list of property name/return location pairs, followed by NULL

 

Since 3.0


gtk_style_context_get_section ()

GtkCssSection *
gtk_style_context_get_section (GtkStyleContext *context,
                               const gchar *property);

Queries the location in the CSS where property was defined for the current context . Note that the state to be queried is taken from gtk_style_context_get_state().

If the location is not available, NULL will be returned. The location might not be available for various reasons, such as the property being overridden, property not naming a supported CSS property or tracking of definitions being disabled for performance reasons.

Shorthand CSS properties cannot be queried for a location and will always return NULL.

Parameters

context

a GtkStyleContext

 

property

style property name

 

Returns

NULL or the section where value was defined


gtk_style_context_get_color ()

void
gtk_style_context_get_color (GtkStyleContext *context,
                             GtkStateFlags state,
                             GdkRGBA *color);

Gets the foreground color for a given state.

Parameters

context

a GtkStyleContext

 

state

state to retrieve the color for

 

color

return value for the foreground color.

[out]

Since 3.0


gtk_style_context_get_background_color ()

void
gtk_style_context_get_background_color
                               (GtkStyleContext *context,
                                GtkStateFlags state,
                                GdkRGBA *color);

Gets the background color for a given state.

Parameters

context

a GtkStyleContext

 

state

state to retrieve the color for

 

color

return value for the background color.

[out]

Since 3.0


gtk_style_context_get_border_color ()

void
gtk_style_context_get_border_color (GtkStyleContext *context,
                                    GtkStateFlags state,
                                    GdkRGBA *color);

Gets the border color for a given state.

Parameters

context

a GtkStyleContext

 

state

state to retrieve the color for

 

color

return value for the border color.

[out]

Since 3.0


gtk_style_context_get_border ()

void
gtk_style_context_get_border (GtkStyleContext *context,
                              GtkStateFlags state,
                              GtkBorder *border);

Gets the border for a given state as a GtkBorder. See GTK_STYLE_PROPERTY_BORDER_WIDTH.

Parameters

context

a GtkStyleContext

 

state

state to retrieve the border for

 

border

return value for the border settings.

[out]

Since 3.0


gtk_style_context_get_padding ()

void
gtk_style_context_get_padding (GtkStyleContext *context,
                               GtkStateFlags state,
                               GtkBorder *padding);

Gets the padding for a given state as a GtkBorder. See GTK_STYLE_PROPERTY_PADDING.

Parameters

context

a GtkStyleContext

 

state

state to retrieve the padding for

 

padding

return value for the padding settings.

[out]

Since 3.0


gtk_style_context_get_margin ()

void
gtk_style_context_get_margin (GtkStyleContext *context,
                              GtkStateFlags state,
                              GtkBorder *margin);

Gets the margin for a given state as a GtkBorder. See GTK_STYLE_PROPERTY_MARGIN.

Parameters

context

a GtkStyleContext

 

state

state to retrieve the border for

 

margin

return value for the margin settings.

[out]

Since 3.0


gtk_style_context_get_font ()

const PangoFontDescription *
gtk_style_context_get_font (GtkStyleContext *context,
                            GtkStateFlags state);

gtk_style_context_get_font has been deprecated since version 3.8 and should not be used in newly-written code.

Use gtk_style_context_get() for "font" or subproperties instead.

Returns the font description for a given state. The returned object is const and will remain valid until the “changed” signal happens.

Parameters

context

a GtkStyleContext

 

state

state to retrieve the font for

 

Returns

the PangoFontDescription for the given state. This object is owned by GTK+ and should not be freed.

[transfer none]

Since 3.0


gtk_style_context_invalidate ()

void
gtk_style_context_invalidate (GtkStyleContext *context);

gtk_style_context_invalidate has been deprecated since version 3.12 and should not be used in newly-written code.

Style contexts are invalidated automatically.

Invalidates context style information, so it will be reconstructed again. It is useful if you modify the context and need the new information immediately.

Parameters

context

a GtkStyleContext.

 

Since 3.0


gtk_style_context_state_is_running ()

gboolean
gtk_style_context_state_is_running (GtkStyleContext *context,
                                    GtkStateType state,
                                    gdouble *progress);

gtk_style_context_state_is_running has been deprecated since version 3.6 and should not be used in newly-written code.

This function always returns FALSE

Returns TRUE if there is a transition animation running for the current region (see gtk_style_context_push_animatable_region()).

If progress is not NULL, the animation progress will be returned there, 0.0 means the state is closest to being unset, while 1.0 means it’s closest to being set. This means transition animation will run from 0 to 1 when state is being set and from 1 to 0 when it’s being unset.

Parameters

context

a GtkStyleContext

 

state

a widget state

 

progress

return location for the transition progress.

[out]

Returns

TRUE if there is a running transition animation for state .

Since 3.0


gtk_style_context_lookup_color ()

gboolean
gtk_style_context_lookup_color (GtkStyleContext *context,
                                const gchar *color_name,
                                GdkRGBA *color);

Looks up and resolves a color name in the context color map.

Parameters

context

a GtkStyleContext

 

color_name

color name to lookup

 

color

Return location for the looked up color.

[out]

Returns

TRUE if color_name was found and resolved, FALSE otherwise


gtk_style_context_lookup_icon_set ()

GtkIconSet *
gtk_style_context_lookup_icon_set (GtkStyleContext *context,
                                   const gchar *stock_id);

gtk_style_context_lookup_icon_set has been deprecated since version 3.10 and should not be used in newly-written code.

Use gtk_icon_theme_lookup_icon() instead.

Looks up stock_id in the icon factories associated to context and the default icon factory, returning an icon set if found, otherwise NULL.

Parameters

context

a GtkStyleContext

 

stock_id

an icon name

 

Returns

The looked up GtkIconSet, or NULL.

[transfer none]


gtk_style_context_notify_state_change ()

void
gtk_style_context_notify_state_change (GtkStyleContext *context,
                                       GdkWindow *window,
                                       gpointer region_id,
                                       GtkStateType state,
                                       gboolean state_value);

gtk_style_context_notify_state_change has been deprecated since version 3.6 and should not be used in newly-written code.

This function does nothing.

Notifies a state change on context , so if the current style makes use of transition animations, one will be started so all rendered elements under region_id are animated for state state being set to value state_value .

The window parameter is used in order to invalidate the rendered area as the animation runs, so make sure it is the same window that is being rendered on by the gtk_render_*() functions.

If region_id is NULL, all rendered elements using context will be affected by this state transition.

As a practical example, a GtkButton notifying a state transition on the prelight state:

1
2
3
4
5
gtk_style_context_notify_state_change (context,
                                       gtk_widget_get_window (widget),
                                       NULL,
                                       GTK_STATE_PRELIGHT,
                                       button->in_button);

Can be handled in the CSS file like this:

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2
3
4
5
6
7
8
GtkButton {
    background-color: #f00
}

GtkButton:hover {
    background-color: #fff;
    transition: 200ms linear
}

This combination will animate the button background from red to white if a pointer enters the button, and back to red if the pointer leaves the button.

Note that state is used when finding the transition parameters, which is why the style places the transition under the :hover pseudo-class.

Parameters

context

a GtkStyleContext

 

window

a GdkWindow

 

region_id

animatable region to notify on, or NULL. See gtk_style_context_push_animatable_region().

[allow-none]

state

state to trigger transition for

 

state_value

TRUE if state is the state we are changing to, FALSE if we are changing away from it

 

Since 3.0


gtk_style_context_pop_animatable_region ()

void
gtk_style_context_pop_animatable_region
                               (GtkStyleContext *context);

gtk_style_context_pop_animatable_region has been deprecated since version 3.6 and should not be used in newly-written code.

This function does nothing.

Pops an animatable region from context . See gtk_style_context_push_animatable_region().

Parameters

context

a GtkStyleContext

 

Since 3.0


gtk_style_context_push_animatable_region ()

void
gtk_style_context_push_animatable_region
                               (GtkStyleContext *context,
                                gpointer region_id);

gtk_style_context_push_animatable_region has been deprecated since version 3.6 and should not be used in newly-written code.

This function does nothing.

Pushes an animatable region, so all further gtk_render_*() calls between this call and the following gtk_style_context_pop_animatable_region() will potentially show transition animations for this region if gtk_style_context_notify_state_change() is called for a given state, and the current theme/style defines transition animations for state changes.

The region_id used must be unique in context so the theming engine can uniquely identify rendered elements subject to a state transition.

Parameters

context

a GtkStyleContext

 

region_id

unique identifier for the animatable region

 

Since 3.0


gtk_style_context_cancel_animations ()

void
gtk_style_context_cancel_animations (GtkStyleContext *context,
                                     gpointer region_id);

gtk_style_context_cancel_animations has been deprecated since version 3.6 and should not be used in newly-written code.

This function does nothing.

Stops all running animations for region_id and all animatable regions underneath.

A NULL region_id will stop all ongoing animations in context , when dealing with a GtkStyleContext obtained through gtk_widget_get_style_context(), this is normally done for you in all circumstances you would expect all widget to be stopped, so this should be only used in complex widgets with different animatable regions.

Parameters

context

a GtkStyleContext

 

region_id

animatable region to stop, or NULL. See gtk_style_context_push_animatable_region().

[allow-none]

Since 3.0


gtk_style_context_scroll_animations ()

void
gtk_style_context_scroll_animations (GtkStyleContext *context,
                                     GdkWindow *window,
                                     gint dx,
                                     gint dy);

gtk_style_context_scroll_animations has been deprecated since version 3.6 and should not be used in newly-written code.

This function does nothing.

This function is analogous to gdk_window_scroll(), and should be called together with it so the invalidation areas for any ongoing animation are scrolled together with it.

Parameters

context

a GtkStyleContext

 

window

a GdkWindow used previously in gtk_style_context_notify_state_change()

 

dx

Amount to scroll in the X axis

 

dy

Amount to scroll in the Y axis

 

Since 3.0


gtk_style_context_remove_provider ()

void
gtk_style_context_remove_provider (GtkStyleContext *context,
                                   GtkStyleProvider *provider);

Removes provider from the style providers list in context .

Parameters

context

a GtkStyleContext

 

provider

a GtkStyleProvider

 

Since 3.0


gtk_style_context_remove_provider_for_screen ()

void
gtk_style_context_remove_provider_for_screen
                               (GdkScreen *screen,
                                GtkStyleProvider *provider);

Removes provider from the global style providers list in screen .

Parameters

screen

a GdkScreen

 

provider

a GtkStyleProvider

 

Since 3.0


gtk_style_context_reset_widgets ()

void
gtk_style_context_reset_widgets (GdkScreen *screen);

This function recomputes the styles for all widgets under a particular GdkScreen. This is useful when some global parameter has changed that affects the appearance of all widgets, because when a widget gets a new style, it will both redraw and recompute any cached information about its appearance. As an example, it is used when the color scheme changes in the related GtkSettings object.

Parameters

screen

a GdkScreen

 

Since 3.0


gtk_style_context_set_background ()

void
gtk_style_context_set_background (GtkStyleContext *context,
                                  GdkWindow *window);

Sets the background of window to the background pattern or color specified in context for its current state.

Parameters

context

a GtkStyleContext

 

window

a GdkWindow

 

Since 3.0


gtk_style_context_restore ()

void
gtk_style_context_restore (GtkStyleContext *context);

Restores context state to a previous stage. See gtk_style_context_save().

Parameters

context

a GtkStyleContext

 

Since 3.0


gtk_style_context_save ()

void
gtk_style_context_save (GtkStyleContext *context);

Saves the context state, so all modifications done through gtk_style_context_add_class(), gtk_style_context_remove_class(), gtk_style_context_add_region(), gtk_style_context_remove_region() or gtk_style_context_set_junction_sides() can be reverted in one go through gtk_style_context_restore().

Parameters

context

a GtkStyleContext

 

Since 3.0


gtk_style_context_set_direction ()

void
gtk_style_context_set_direction (GtkStyleContext *context,
                                 GtkTextDirection direction);

gtk_style_context_set_direction has been deprecated since version 3.8 and should not be used in newly-written code.

Use gtk_style_context_set_state() with GTK_STATE_FLAG_DIR_LTR and GTK_STATE_FLAG_DIR_RTL instead.

Sets the reading direction for rendering purposes.

If you are using a GtkStyleContext returned from gtk_widget_get_style_context(), you do not need to call this yourself.

Parameters

context

a GtkStyleContext

 

direction

the new direction.

 

Since 3.0


gtk_style_context_set_junction_sides ()

void
gtk_style_context_set_junction_sides (GtkStyleContext *context,
                                      GtkJunctionSides sides);

Sets the sides where rendered elements (mostly through gtk_render_frame()) will visually connect with other visual elements.

This is merely a hint that may or may not be honored by theming engines.

Container widgets are expected to set junction hints as appropriate for their children, so it should not normally be necessary to call this function manually.

Parameters

context

a GtkStyleContext

 

sides

sides where rendered elements are visually connected to other elements

 

Since 3.0


gtk_style_context_set_parent ()

void
gtk_style_context_set_parent (GtkStyleContext *context,
                              GtkStyleContext *parent);

Sets the parent style context for context . The parent style context is used to implement inheritance of properties.

If you are using a GtkStyleContext returned from gtk_widget_get_style_context(), the parent will be set for you.

Parameters

context

a GtkStyleContext

 

parent

the new parent or NULL.

[allow-none]

Since 3.4


gtk_style_context_set_path ()

void
gtk_style_context_set_path (GtkStyleContext *context,
                            GtkWidgetPath *path);

Sets the GtkWidgetPath used for style matching. As a consequence, the style will be regenerated to match the new given path.

If you are using a GtkStyleContext returned from gtk_widget_get_style_context(), you do not need to call this yourself.

Parameters

context

a GtkStyleContext

 

path

a GtkWidgetPath

 

Since 3.0


gtk_style_context_add_class ()

void
gtk_style_context_add_class (GtkStyleContext *context,
                             const gchar *class_name);

Adds a style class to context , so posterior calls to gtk_style_context_get() or any of the gtk_render_*() functions will make use of this new class for styling.

In the CSS file format, a GtkEntry defining an “entry” class, would be matched by:

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GtkEntry.entry { ... }

While any widget defining an “entry” class would be matched by:

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.entry { ... }

Parameters

context

a GtkStyleContext

 

class_name

class name to use in styling

 

Since 3.0


gtk_style_context_remove_class ()

void
gtk_style_context_remove_class (GtkStyleContext *context,
                                const gchar *class_name);

Removes class_name from context .

Parameters

context

a GtkStyleContext

 

class_name

class name to remove

 

Since 3.0


gtk_style_context_has_class ()

gboolean
gtk_style_context_has_class (GtkStyleContext *context,
                             const gchar *class_name);

Returns TRUE if context currently has defined the given class name

Parameters

context

a GtkStyleContext

 

class_name

a class name

 

Returns

TRUE if context has class_name defined

Since 3.0


gtk_style_context_list_classes ()

GList *
gtk_style_context_list_classes (GtkStyleContext *context);

Returns the list of classes currently defined in context .

Parameters

context

a GtkStyleContext

 

Returns

a GList of strings with the currently defined classes. The contents of the list are owned by GTK+, but you must free the list itself with g_list_free() when you are done with it.

[transfer container][element-type utf8]

Since 3.0


gtk_style_context_add_region ()

void
gtk_style_context_add_region (GtkStyleContext *context,
                              const gchar *region_name,
                              GtkRegionFlags flags);

Adds a region to context , so posterior calls to gtk_style_context_get() or any of the gtk_render_*() functions will make use of this new region for styling.

In the CSS file format, a GtkTreeView defining a “row” region, would be matched by:

1
GtkTreeView row { ... }

Pseudo-classes are used for matching flags , so the two following rules:

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GtkTreeView row:nth-child(even) { ... }
GtkTreeView row:nth-child(odd) { ... }

would apply to even and odd rows, respectively.

Region names must only contain lowercase letters and “-”, starting always with a lowercase letter.

Parameters

context

a GtkStyleContext

 

region_name

region name to use in styling

 

flags

flags that apply to the region

 

Since 3.0


gtk_style_context_remove_region ()

void
gtk_style_context_remove_region (GtkStyleContext *context,
                                 const gchar *region_name);

Removes a region from context .

Parameters

context

a GtkStyleContext

 

region_name

region name to unset

 

Since 3.0


gtk_style_context_has_region ()

gboolean
gtk_style_context_has_region (GtkStyleContext *context,
                              const gchar *region_name,
                              GtkRegionFlags *flags_return);

Returns TRUE if context has the region defined. If flags_return is not NULL, it is set to the flags affecting the region.

Parameters

context

a GtkStyleContext

 

region_name

a region name

 

flags_return

return location for region flags.

[out][allow-none]

Returns

TRUE if region is defined

Since 3.0


gtk_style_context_list_regions ()

GList *
gtk_style_context_list_regions (GtkStyleContext *context);

Returns the list of regions currently defined in context .

Parameters

context

a GtkStyleContext

 

Returns

a GList of strings with the currently defined regions. The contents of the list are owned by GTK+, but you must free the list itself with g_list_free() when you are done with it.

[transfer container][element-type utf8]

Since 3.0


gtk_style_context_set_screen ()

void
gtk_style_context_set_screen (GtkStyleContext *context,
                              GdkScreen *screen);

Attaches context to the given screen.

The screen is used to add style information from “global” style providers, such as the screens GtkSettings instance.

If you are using a GtkStyleContext returned from gtk_widget_get_style_context(), you do not need to call this yourself.

Parameters

context

a GtkStyleContext

 

screen

a GdkScreen

 

Since 3.0


gtk_style_context_set_frame_clock ()

void
gtk_style_context_set_frame_clock (GtkStyleContext *context,
                                   GdkFrameClock *frame_clock);

Attaches context to the given frame clock.

The frame clock is used for the timing of animations.

If you are using a GtkStyleContext returned from gtk_widget_get_style_context(), you do not need to call this yourself.

Parameters

context

a GdkFrameClock

 

frame_clock

a GdkFrameClock

 

Since 3.8


gtk_style_context_set_state ()

void
gtk_style_context_set_state (GtkStyleContext *context,
                             GtkStateFlags flags);

Sets the state to be used when rendering with any of the gtk_render_*() functions.

Parameters

context

a GtkStyleContext

 

flags

state to represent

 

Since 3.0


gtk_style_context_set_scale ()

void
gtk_style_context_set_scale (GtkStyleContext *context,
                             gint scale);

Sets the scale to use when getting image assets for the style .

Parameters

context

a GtkStyleContext

 

scale

scale

 

Since 3.10


gtk_style_context_get_scale ()

gint
gtk_style_context_get_scale (GtkStyleContext *context);

Returns the scale used for assets.

Parameters

context

a GtkStyleContext

 

Returns

the scale

Since 3.10


gtk_border_new ()

GtkBorder *
gtk_border_new (void);

Allocates a new GtkBorder and initializes its elements to zero.

Returns

a newly allocated GtkBorder. Free with gtk_border_free()

Since 2.14


gtk_border_copy ()

GtkBorder *
gtk_border_copy (const GtkBorder *border_);

Copies a GtkBorder.

Parameters

border_

a GtkBorder

 

Returns

a copy of border_ .


gtk_border_free ()

void
gtk_border_free (GtkBorder *border_);

Frees a GtkBorder.

Parameters

border_

a GtkBorder

 

gtk_render_arrow ()

void
gtk_render_arrow (GtkStyleContext *context,
                  cairo_t *cr,
                  gdouble angle,
                  gdouble x,
                  gdouble y,
                  gdouble size);

Renders an arrow pointing to angle .

Typical arrow rendering at 0, 1⁄2 π, π and 3⁄2 π:

Parameters

context

a GtkStyleContext

 

cr

a cairo_t

 

angle

arrow angle from 0 to 2 * G_PI, being 0 the arrow pointing to the north

 

x

X origin of the render area

 

y

Y origin of the render area

 

size

square side for render area

 

Since 3.0


gtk_render_background ()

void
gtk_render_background (GtkStyleContext *context,
                       cairo_t *cr,
                       gdouble x,
                       gdouble y,
                       gdouble width,
                       gdouble height);

Renders the background of an element.

Typical background rendering, showing the effect of background-image, border-width and border-radius:

Parameters

context

a GtkStyleContext

 

cr

a cairo_t

 

x

X origin of the rectangle

 

y

Y origin of the rectangle

 

width

rectangle width

 

height

rectangle height

 

Since 3.0.


gtk_render_check ()

void
gtk_render_check (GtkStyleContext *context,
                  cairo_t *cr,
                  gdouble x,
                  gdouble y,
                  gdouble width,
                  gdouble height);

Renders a checkmark (as in a GtkCheckButton).

The GTK_STATE_FLAG_ACTIVE state determines whether the check is on or off, and GTK_STATE_FLAG_INCONSISTENT determines whether it should be marked as undefined.

Typical checkmark rendering:

Parameters

context

a GtkStyleContext

 

cr

a cairo_t

 

x

X origin of the rectangle

 

y

Y origin of the rectangle

 

width

rectangle width

 

height

rectangle height

 

Since 3.0


gtk_render_expander ()

void
gtk_render_expander (GtkStyleContext *context,
                     cairo_t *cr,
                     gdouble x,
                     gdouble y,
                     gdouble width,
                     gdouble height);

Renders an expander (as used in GtkTreeView and GtkExpander) in the area defined by x , y , width , height . The state GTK_STATE_FLAG_ACTIVE determines whether the expander is collapsed or expanded.

Typical expander rendering:

Parameters

context

a GtkStyleContext

 

cr

a cairo_t

 

x

X origin of the rectangle

 

y

Y origin of the rectangle

 

width

rectangle width

 

height

rectangle height

 

Since 3.0


gtk_render_extension ()

void
gtk_render_extension (GtkStyleContext *context,
                      cairo_t *cr,
                      gdouble x,
                      gdouble y,
                      gdouble width,
                      gdouble height,
                      GtkPositionType gap_side);

Renders a extension (as in a GtkNotebook tab) in the rectangle defined by x , y , width , height . The side where the extension connects to is defined by gap_side .

Typical extension rendering:

Parameters

context

a GtkStyleContext

 

cr

a cairo_t

 

x

X origin of the rectangle

 

y

Y origin of the rectangle

 

width

rectangle width

 

height

rectangle height

 

gap_side

side where the gap is

 

Since 3.0


gtk_render_focus ()

void
gtk_render_focus (GtkStyleContext *context,
                  cairo_t *cr,
                  gdouble x,
                  gdouble y,
                  gdouble width,
                  gdouble height);

Renders a focus indicator on the rectangle determined by x , y , width , height .

Typical focus rendering:

Parameters

context

a GtkStyleContext

 

cr

a cairo_t

 

x

X origin of the rectangle

 

y

Y origin of the rectangle

 

width

rectangle width

 

height

rectangle height

 

Since 3.0


gtk_render_frame ()

void
gtk_render_frame (GtkStyleContext *context,
                  cairo_t *cr,
                  gdouble x,
                  gdouble y,
                  gdouble width,
                  gdouble height);

Renders a frame around the rectangle defined by x , y , width , height .

Examples of frame rendering, showing the effect of border-image, border-color, border-width, border-radius and junctions:

Parameters

context

a GtkStyleContext

 

cr

a cairo_t

 

x

X origin of the rectangle

 

y

Y origin of the rectangle

 

width

rectangle width

 

height

rectangle height

 

Since 3.0


gtk_render_frame_gap ()

void
gtk_render_frame_gap (GtkStyleContext *context,
                      cairo_t *cr,
                      gdouble x,
                      gdouble y,
                      gdouble width,
                      gdouble height,
                      GtkPositionType gap_side,
                      gdouble xy0_gap,
                      gdouble xy1_gap);

Renders a frame around the rectangle defined by (x , y , width , height ), leaving a gap on one side. xy0_gap and xy1_gap will mean X coordinates for GTK_POS_TOP and GTK_POS_BOTTOM gap sides, and Y coordinates for GTK_POS_LEFT and GTK_POS_RIGHT.

Typical rendering of a frame with a gap:

Parameters

context

a GtkStyleContext

 

cr

a cairo_t

 

x

X origin of the rectangle

 

y

Y origin of the rectangle

 

width

rectangle width

 

height

rectangle height

 

gap_side

side where the gap is

 

xy0_gap

initial coordinate (X or Y depending on gap_side ) for the gap

 

xy1_gap

end coordinate (X or Y depending on gap_side ) for the gap

 

Since 3.0


gtk_render_handle ()

void
gtk_render_handle (GtkStyleContext *context,
                   cairo_t *cr,
                   gdouble x,
                   gdouble y,
                   gdouble width,
                   gdouble height);

Renders a handle (as in GtkHandleBox, GtkPaned and GtkWindow’s resize grip), in the rectangle determined by x , y , width , height .

Handles rendered for the paned and grip classes:

Parameters

context

a GtkStyleContext

 

cr

a cairo_t

 

x

X origin of the rectangle

 

y

Y origin of the rectangle

 

width

rectangle width

 

height

rectangle height

 

Since 3.0


gtk_render_layout ()

void
gtk_render_layout (GtkStyleContext *context,
                   cairo_t *cr,
                   gdouble x,
                   gdouble y,
                   PangoLayout *layout);

Renders layout on the coordinates x , y

Parameters

context

a GtkStyleContext

 

cr

a cairo_t

 

x

X origin

 

y

Y origin

 

layout

the PangoLayout to render

 

Since 3.0


gtk_render_line ()

void
gtk_render_line (GtkStyleContext *context,
                 cairo_t *cr,
                 gdouble x0,
                 gdouble y0,
                 gdouble x1,
                 gdouble y1);

Renders a line from (x0, y0) to (x1, y1).

Parameters

context

a GtkStyleContext

 

cr

a cairo_t

 

x0

X coordinate for the origin of the line

 

y0

Y coordinate for the origin of the line

 

x1

X coordinate for the end of the line

 

y1

Y coordinate for the end of the line

 

Since 3.0


gtk_render_option ()

void
gtk_render_option (GtkStyleContext *context,
                   cairo_t *cr,
                   gdouble x,
                   gdouble y,
                   gdouble width,
                   gdouble height);

Renders an option mark (as in a GtkRadioButton), the GTK_STATE_FLAG_ACTIVE state will determine whether the option is on or off, and GTK_STATE_FLAG_INCONSISTENT whether it should be marked as undefined.

Typical option mark rendering:

Parameters

context

a GtkStyleContext

 

cr

a cairo_t

 

x

X origin of the rectangle

 

y

Y origin of the rectangle

 

width

rectangle width

 

height

rectangle height

 

Since 3.0


gtk_render_slider ()

void
gtk_render_slider (GtkStyleContext *context,
                   cairo_t *cr,
                   gdouble x,
                   gdouble y,
                   gdouble width,
                   gdouble height,
                   GtkOrientation orientation);

Renders a slider (as in GtkScale) in the rectangle defined by x , y , width , height . orientation defines whether the slider is vertical or horizontal.

Typical slider rendering:

Parameters

context

a GtkStyleContext

 

cr

a cairo_t

 

x

X origin of the rectangle

 

y

Y origin of the rectangle

 

width

rectangle width

 

height

rectangle height

 

orientation

orientation of the slider

 

Since 3.0


gtk_render_activity ()

void
gtk_render_activity (GtkStyleContext *context,
                     cairo_t *cr,
                     gdouble x,
                     gdouble y,
                     gdouble width,
                     gdouble height);

Renders an activity area (Such as in GtkSpinner or the fill line in GtkRange), the state GTK_STATE_FLAG_ACTIVE determines whether there is activity going on.

Parameters

context

a GtkStyleContext

 

cr

a cairo_t

 

x

X origin of the rectangle

 

y

Y origin of the rectangle

 

width

rectangle width

 

height

rectangle height

 

Since 3.0


gtk_render_icon_pixbuf ()

GdkPixbuf *
gtk_render_icon_pixbuf (GtkStyleContext *context,
                        const GtkIconSource *source,
                        GtkIconSize size);

gtk_render_icon_pixbuf has been deprecated since version 3.10 and should not be used in newly-written code.

Use gtk_icon_theme_load_icon() instead.

Renders the icon specified by source at the given size , returning the result in a pixbuf.

Parameters

context

a GtkStyleContext

 

source

the GtkIconSource specifying the icon to render

 

size

the size to render the icon at. A size of (GtkIconSize) -1 means render at the size of the source and don’t scale.

[type int]

Returns

a newly-created GdkPixbuf containing the rendered icon.

[transfer full]

Since 3.0


gtk_render_icon_surface ()

void
gtk_render_icon_surface (GtkStyleContext *context,
                         cairo_t *cr,
                         cairo_surface_t *surface,
                         gdouble x,
                         gdouble y);

Renders the icon in surface at the specified x and y coordinates.

Parameters

context

a GtkStyleContext

 

cr

a cairo_t

 

surface

a cairo_surface_t containing the icon to draw

 

x

X position for the icon

 

y

Y position for the incon

 

Since 3.10


gtk_render_icon ()

void
gtk_render_icon (GtkStyleContext *context,
                 cairo_t *cr,
                 GdkPixbuf *pixbuf,
                 gdouble x,
                 gdouble y);

Renders the icon in pixbuf at the specified x and y coordinates.

Parameters

context

a GtkStyleContext

 

cr

a cairo_t

 

pixbuf

a GdkPixbuf containing the icon to draw

 

x

X position for the pixbuf

 

y

Y position for the pixbuf

 

Since 3.2


gtk_render_insertion_cursor ()

void
gtk_render_insertion_cursor (GtkStyleContext *context,
                             cairo_t *cr,
                             gdouble x,
                             gdouble y,
                             PangoLayout *layout,
                             int index,
                             PangoDirection direction);

Draws a text caret on cr at the specified index of layout .

Parameters

context

a GtkStyleContext

 

cr

a cairo_t

 

x

X origin

 

y

Y origin

 

layout

the PangoLayout of the text

 

index

the index in the PangoLayout

 

direction

the PangoDirection of the text

 

Since 3.4

Types and Values

GTK_STYLE_PROPERTY_BACKGROUND_COLOR

#define GTK_STYLE_PROPERTY_BACKGROUND_COLOR "background-color"

A property holding the background color of rendered elements as a GdkRGBA.


GTK_STYLE_PROPERTY_COLOR

#define GTK_STYLE_PROPERTY_COLOR "color"

A property holding the foreground color of rendered elements as a GdkRGBA.


GTK_STYLE_PROPERTY_FONT

#define GTK_STYLE_PROPERTY_FONT "font"

A property holding the font properties used when rendering text as a PangoFontDescription.


GTK_STYLE_PROPERTY_MARGIN

#define GTK_STYLE_PROPERTY_MARGIN "margin"

A property holding the rendered element’s margin as a GtkBorder. The margin is defined as the spacing between the border of the element and its surrounding elements. It is external to GtkWidget's size allocations, and the most external spacing property of the padding/border/margin series.


GTK_STYLE_PROPERTY_PADDING

#define GTK_STYLE_PROPERTY_PADDING "padding"

A property holding the rendered element’s padding as a GtkBorder. The padding is defined as the spacing between the inner part of the element border and its child. It’s the innermost spacing property of the padding/border/margin series.


GTK_STYLE_PROPERTY_BORDER_WIDTH

#define GTK_STYLE_PROPERTY_BORDER_WIDTH "border-width"

A property holding the rendered element’s border width in pixels as a GtkBorder. The border is the intermediary spacing property of the padding/border/margin series.

gtk_render_frame() uses this property to find out the frame line width, so GtkWidgets rendering frames may need to add up this padding when requesting size


GTK_STYLE_PROPERTY_BORDER_RADIUS

#define GTK_STYLE_PROPERTY_BORDER_RADIUS "border-radius"

A property holding the rendered element’s border radius in pixels as a gint.


GTK_STYLE_PROPERTY_BORDER_STYLE

#define GTK_STYLE_PROPERTY_BORDER_STYLE "border-style"

A property holding the element’s border style as a GtkBorderStyle.


GTK_STYLE_PROPERTY_BORDER_COLOR

#define GTK_STYLE_PROPERTY_BORDER_COLOR "border-color"

A property holding the element’s border color as a GdkRGBA.


GTK_STYLE_PROPERTY_BACKGROUND_IMAGE

#define GTK_STYLE_PROPERTY_BACKGROUND_IMAGE "background-image"

A property holding the element’s background as a cairo_pattern_t.


GTK_STYLE_CLASS_BACKGROUND

#define GTK_STYLE_CLASS_BACKGROUND "background"

A CSS class to match the window background.


GTK_STYLE_CLASS_BUTTON

#define GTK_STYLE_CLASS_BUTTON "button"

A CSS class to match buttons.

This is used by GtkButton and its subclasses, as well as various other widget pieces that appear like buttons, e.g. the arrows in a GtkCalendar.


GTK_STYLE_CLASS_CALENDAR

#define GTK_STYLE_CLASS_CALENDAR "calendar"

A CSS class to match calendars.

This is not used by GTK+ itself, currently.


GTK_STYLE_CLASS_CELL

#define GTK_STYLE_CLASS_CELL "cell"

A CSS class to match content rendered in cell views.

This is used by cell renderers, e.g. in GtkIconView and GtkTreeView.


GTK_STYLE_CLASS_COMBOBOX_ENTRY

#define GTK_STYLE_CLASS_COMBOBOX_ENTRY "combobox-entry"

A CSS class to match combobox entries.

This is used by GtkComboBox.


GTK_STYLE_CLASS_CHECK

#define GTK_STYLE_CLASS_CHECK "check"

A CSS class to match check boxes.

This is used in GtkCheckButton, GtkCheckMenuItem and GtkCellRendererToggle.


GTK_STYLE_CLASS_DEFAULT

#define GTK_STYLE_CLASS_DEFAULT "default"

A CSS class to match the default widget.

This is used by GtkButton.


GTK_STYLE_CLASS_ENTRY

#define GTK_STYLE_CLASS_ENTRY "entry"

A CSS class to match text entries.

This is used by GtkEntry.


GTK_STYLE_CLASS_HEADER

#define GTK_STYLE_CLASS_HEADER "header"

A CSS class to match a header element.

This is used for the header in GtkCalendar.


GTK_STYLE_CLASS_MENU

#define GTK_STYLE_CLASS_MENU "menu"

A CSS class to match menus.

This is used in GtkMenu.


GTK_STYLE_CLASS_RADIO

#define GTK_STYLE_CLASS_RADIO "radio"

A CSS class to match radio buttons.

This is used in GtkRadioButton, GtkRadioMenuItem and GtkCellRendererToggle.


GTK_STYLE_CLASS_RUBBERBAND

#define GTK_STYLE_CLASS_RUBBERBAND "rubberband"

A CSS class to match the rubberband selection rectangle.

This is used in GtkIconView and GtkTreeView.


GTK_STYLE_CLASS_SCROLLBAR

#define GTK_STYLE_CLASS_SCROLLBAR "scrollbar"

A CSS class to match scrollbars.


GTK_STYLE_CLASS_SCROLLBARS_JUNCTION

#define GTK_STYLE_CLASS_SCROLLBARS_JUNCTION "scrollbars-junction"

A CSS class to match the junction area between an horizontal and vertical scrollbar, when they’re both shown.

This is used in GtkScrolledWindow.


GTK_STYLE_CLASS_SLIDER

#define GTK_STYLE_CLASS_SLIDER "slider"

A CSS class to match sliders.

This is used by GtkSwitch and GtkRange and its subclasses.


GTK_STYLE_CLASS_TOOLTIP

#define GTK_STYLE_CLASS_TOOLTIP "tooltip"

A CSS class to match tooltip windows.


GTK_STYLE_CLASS_TROUGH

#define GTK_STYLE_CLASS_TROUGH "trough"

A CSS class to match troughs, as in scrollbars and progressbars.

This is used in GtkRange and its subclasses, GtkProgressBar and GtkSwitch.


GTK_STYLE_CLASS_ACCELERATOR

#define GTK_STYLE_CLASS_ACCELERATOR "accelerator"

A CSS class to match an accelerator.

This is used for the accelerator in GtkAccelLabel.


GTK_STYLE_CLASS_DOCK

#define GTK_STYLE_CLASS_DOCK "dock"

A CSS class defining a dock area.

This is used by GtkHandleBox.


GTK_STYLE_CLASS_GRIP

#define GTK_STYLE_CLASS_GRIP "grip"

A CSS class defining a resize grip.

This is used for the resize grip in GtkWindow.


GTK_STYLE_CLASS_MENUBAR

#define GTK_STYLE_CLASS_MENUBAR "menubar"

A CSS class to menubars.

This is used in GtkMenuBar.


GTK_STYLE_CLASS_MENUITEM

#define GTK_STYLE_CLASS_MENUITEM "menuitem"

A CSS class to match menu items.

This is used in GtkMenuItem and its subclasses.


GTK_STYLE_CLASS_PROGRESSBAR

#define GTK_STYLE_CLASS_PROGRESSBAR "progressbar"

A CSS class to use when rendering activity as a progressbar.

This is used in GtkProgressBar and when drawing progress inside a GtkEntry or in GtkCellRendererProgress.


GTK_STYLE_CLASS_SPINNER

#define GTK_STYLE_CLASS_SPINNER "spinner"

A CSS class to use when rendering activity as a “spinner”.

This is used by GtkSpinner and GtkCellRendererSpinner.


GTK_STYLE_CLASS_TOOLBAR

#define GTK_STYLE_CLASS_TOOLBAR "toolbar"

A CSS class to match toolbars.

This is used in GtkToolbar.


GTK_STYLE_CLASS_PRIMARY_TOOLBAR

#define GTK_STYLE_CLASS_PRIMARY_TOOLBAR "primary-toolbar"

A CSS class to match primary toolbars.

This should be used for the “main” toolbar of an application, right below its menubar.


GTK_STYLE_CLASS_INLINE_TOOLBAR

#define GTK_STYLE_CLASS_INLINE_TOOLBAR "inline-toolbar"

A CSS class to match inline toolbars.

This should be used for toolbars that are used to hold actions below lists, as seen e.g. in the left pane of the file chooser.


GTK_STYLE_CLASS_PANE_SEPARATOR

#define GTK_STYLE_CLASS_PANE_SEPARATOR "pane-separator"

A CSS class for a pane separator, such as those in GtkPaned.

Used in GtkPaned.


GTK_STYLE_CLASS_SEPARATOR

#define GTK_STYLE_CLASS_SEPARATOR "separator"

A CSS class for a separator.

This is used in GtkSeparator, GtkSeparatorMenuItem, GtkSeparatorToolItem, and when drawing separators in GtkTreeView.


GTK_STYLE_CLASS_SIDEBAR

#define GTK_STYLE_CLASS_SIDEBAR "sidebar"

A CSS class defining a sidebar, such as the left side in a file chooser.

This is used in GtkFileChooser and in GtkAssistant.


GTK_STYLE_CLASS_DND

#define GTK_STYLE_CLASS_DND "dnd"

A CSS class for a drag-and-drop indicator.

This is used when drawing an outline around a potential drop target during DND.


GTK_STYLE_CLASS_ERROR

#define GTK_STYLE_CLASS_ERROR "error"

A CSS class for an area displaying an error message, such as those in infobars.

This is used by GtkInfoBar.


GTK_STYLE_CLASS_EXPANDER

#define GTK_STYLE_CLASS_EXPANDER "expander"

A CSS class defining an expander, such as those in treeviews.

Used for drawing expanders in GtkTreeView, GtkExpander and GtkToolItemGroup.


GTK_STYLE_CLASS_FRAME

#define GTK_STYLE_CLASS_FRAME "frame"

A CSS class defining a frame delimiting content, such as GtkFrame or the scrolled window frame around the scrollable area.

This is used in GtkFrame and GtkScrollbar.


GTK_STYLE_CLASS_HIGHLIGHT

#define GTK_STYLE_CLASS_HIGHLIGHT "highlight"

A CSS class defining a highlighted area, such as headings in assistants and calendars.

This is used in GtkAssistant and GtkCalendar.


GTK_STYLE_CLASS_IMAGE

#define GTK_STYLE_CLASS_IMAGE "image"

A CSS class defining an image, such as the icon in an entry.

This is used when rendering icons in GtkEntry.


GTK_STYLE_CLASS_INFO

#define GTK_STYLE_CLASS_INFO "info"

A CSS class for an area displaying an informational message, such as those in infobars.

This is used by GtkInfoBar.


GTK_STYLE_CLASS_MARK

#define GTK_STYLE_CLASS_MARK "mark"

A CSS class defining marks in a widget, such as in scales.

Used in GtkScale.


GTK_STYLE_CLASS_NOTEBOOK

#define GTK_STYLE_CLASS_NOTEBOOK "notebook"

A CSS class defining a notebook.

Used in GtkNotebook.


GTK_STYLE_CLASS_QUESTION

#define GTK_STYLE_CLASS_QUESTION "question"

A CSS class for an area displaying a question to the user, such as those in infobars.

This is used by GtkInfoBar.


GTK_STYLE_CLASS_SCALE

#define GTK_STYLE_CLASS_SCALE "scale"

A CSS class to match scale widgets.

This is used in GtkScale.


GTK_STYLE_CLASS_SCALE_HAS_MARKS_ABOVE

#define GTK_STYLE_CLASS_SCALE_HAS_MARKS_ABOVE "scale-has-marks-above"

A CSS class to match scale widgets with marks attached, all the marks are above for horizontal GtkScale. left for vertical GtkScale.


GTK_STYLE_CLASS_SCALE_HAS_MARKS_BELOW

#define GTK_STYLE_CLASS_SCALE_HAS_MARKS_BELOW "scale-has-marks-below"

A CSS class to match scale widgets with marks attached, all the marks are below for horizontal GtkScale, right for vertical GtkScale.


GTK_STYLE_CLASS_SPINBUTTON

#define GTK_STYLE_CLASS_SPINBUTTON "spinbutton"

A CSS class defining an spinbutton.

This is used in GtkSpinButton.


GTK_STYLE_CLASS_VIEW

#define GTK_STYLE_CLASS_VIEW "view"

A CSS class defining a view, such as iconviews or treeviews.

This is used in GtkTreeView, GtkIconView, GtkTextView, as well as GtkCalendar.


GTK_STYLE_CLASS_WARNING

#define GTK_STYLE_CLASS_WARNING "warning"

A CSS class for an area displaying a warning message, such as those in infobars.

This is used by GtkInfoBar.


GTK_STYLE_CLASS_HORIZONTAL

#define GTK_STYLE_CLASS_HORIZONTAL "horizontal"

A CSS class for horizontally layered widgets.

This is used by widgets implementing GtkOrientable.


GTK_STYLE_CLASS_VERTICAL

#define GTK_STYLE_CLASS_VERTICAL "vertical"

A CSS class for vertically layered widgets.

This is used by widgets implementing GtkOrientable.


GTK_STYLE_CLASS_TOP

#define GTK_STYLE_CLASS_TOP "top"

A CSS class to indicate an area at the top of a widget.

This is used by widgets that can render an area in different positions, such as tabs in a GtkNotebook.


GTK_STYLE_CLASS_BOTTOM

#define GTK_STYLE_CLASS_BOTTOM "bottom"

A CSS class to indicate an area at the bottom of a widget.

This is used by widgets that can render an area in different positions, such as tabs in a GtkNotebook.


GTK_STYLE_CLASS_LEFT

#define GTK_STYLE_CLASS_LEFT "left"

A CSS class to indicate an area at the left of a widget.

This is used by widgets that can render an area in different positions, such as tabs in a GtkNotebook.


GTK_STYLE_CLASS_RIGHT

#define GTK_STYLE_CLASS_RIGHT "right"

A CSS class to indicate an area at the right of a widget.

This is used by widgets that can render an area in different positions, such as tabs in a GtkNotebook.


GTK_STYLE_CLASS_LINKED

#define GTK_STYLE_CLASS_LINKED "linked"

A CSS class to match a linked area, such as a box containing buttons belonging to the same control.


GTK_STYLE_CLASS_ARROW

#define GTK_STYLE_CLASS_ARROW "arrow"

A CSS class used when rendering an arrow element.

Note that gtk_render_arrow automatically adds this style class to the style context when rendering an arrow element.


GTK_STYLE_CLASS_OSD

#define GTK_STYLE_CLASS_OSD "osd"

A CSS class used when rendering an OSD (On Screen Display) element, on top of another container.


GTK_STYLE_CLASS_LEVEL_BAR

#define GTK_STYLE_CLASS_LEVEL_BAR "level-bar"

A CSS class used when rendering a level indicator, such as a battery charge level, or a password strength.

This is used by GtkLevelBar.


GTK_STYLE_CLASS_CURSOR_HANDLE

#define GTK_STYLE_CLASS_CURSOR_HANDLE "cursor-handle"

A CSS class used when rendering a drag handle for text selection.


GTK_STYLE_CLASS_INSERTION_CURSOR

#define GTK_STYLE_CLASS_INSERTION_CURSOR "insertion-cursor"

A CSS class used when rendering a drag handle for the insertion cursor position.


GTK_STYLE_CLASS_TITLEBAR

#define GTK_STYLE_CLASS_TITLEBAR "titlebar"

A CSS class used when rendering a titlebar in a toplevel window.


GTK_STYLE_REGION_COLUMN

#define GTK_STYLE_REGION_COLUMN "column"

A widget region name to define a treeview column.


GTK_STYLE_REGION_COLUMN_HEADER

#define GTK_STYLE_REGION_COLUMN_HEADER "column-header"

A widget region name to define a treeview column header.


GTK_STYLE_REGION_ROW

#define GTK_STYLE_REGION_ROW "row"

A widget region name to define a treeview row.


GTK_STYLE_REGION_TAB

#define GTK_STYLE_REGION_TAB "tab"

A widget region name to define a notebook tab.


GtkStyleContext

typedef struct _GtkStyleContext GtkStyleContext;

struct GtkBorder

struct GtkBorder {
  gint16 left;
  gint16 right;
  gint16 top;
  gint16 bottom;
};

A struct that specifies a border around a rectangular area that can be of different width on each side.

Members

gint16 left;

The width of the left border

 

gint16 right;

The width of the right border

 

gint16 top;

The width of the top border

 

gint16 bottom;

The width of the bottom border

 

Property Details

The “direction” property

  “direction”                GtkTextDirection

Text direction.

Flags: Read / Write

Default value: GTK_TEXT_DIR_LTR


The “paint-clock” property

  “paint-clock”              GdkFrameClock *

The associated GdkFrameClock.

Flags: Read / Write


The “parent” property

  “parent”                   GtkStyleContext *

Sets or gets the style context’s parent. See gtk_style_context_set_parent() for details.

Flags: Read / Write

Since 3.4


The “screen” property

  “screen”                   GdkScreen *

The associated GdkScreen.

Flags: Read / Write

Signal Details

The “changed” signal

void
user_function (GtkStyleContext *stylecontext,
               gpointer         user_data)

Flags: Run First

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