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GooCanvasPath

GooCanvasPath — a path item (a series of lines and curves).

Synopsis

                    GooCanvasPath;
GooCanvasItem*      goo_canvas_path_new                 (GooCanvasItem *parent,
                                                         const gchar *path_data,
                                                         ...);

Object Hierarchy

  GObject
   +----GooCanvasItemSimple
         +----GooCanvasPath

Implemented Interfaces

GooCanvasPath implements GooCanvasItem.

Properties

  "data"                     gchar*                : Write
  "height"                   gdouble               : Read / Write
  "width"                    gdouble               : Read / Write
  "x"                        gdouble               : Read / Write
  "y"                        gdouble               : Read / Write

Description

GooCanvasPath represents a path item, which is a series of one or more lines, bezier curves, or elliptical arcs.

It is a subclass of GooCanvasItemSimple and so inherits all of the style properties such as "stroke-color", "fill-color" and "line-width".

It also implements the GooCanvasItem interface, so you can use the GooCanvasItem functions such as goo_canvas_item_raise() and goo_canvas_item_rotate().

GooCanvasPath uses the same path specification strings as the Scalable Vector Graphics (SVG) path element. For details see the SVG specification.

To create a GooCanvasPath use goo_canvas_path_new().

To get or set the properties of an existing GooCanvasPath, use g_object_get() and g_object_set().

Details

GooCanvasPath

typedef struct _GooCanvasPath GooCanvasPath;

The GooCanvasPath struct contains private data only.


goo_canvas_path_new ()

GooCanvasItem*      goo_canvas_path_new                 (GooCanvasItem *parent,
                                                         const gchar *path_data,
                                                         ...);

Creates a new path item.

parent :

the parent item, or NULL. If a parent is specified, it will assume ownership of the item, and the item will automatically be freed when it is removed from the parent. Otherwise call g_object_unref() to free it.

path_data :

the sequence of path commands, specified as a string using the same syntax as in the Scalable Vector Graphics (SVG) path element.

... :

optional pairs of property names and values, and a terminating NULL.

Returns :

a new path item.

Here's an example showing how to create a red line from (20,20) to (40,40):

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GooCanvasItem *path = goo_canvas_path_new (mygroup,
                                           "M 20 20 L 40 40",
                                           "stroke-color", "red",
                                           NULL);

This example creates a cubic bezier curve from (20,100) to (100,100) with the control points at (20,50) and (100,50):

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GooCanvasItem *path = goo_canvas_path_new (mygroup,
                                           "M20,100 C20,50 100,50 100,100",
                                           "stroke-color", "blue",
                                           NULL);

This example uses an elliptical arc to create a filled circle with one quarter missing:

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GooCanvasItem *path = goo_canvas_path_new (mygroup,
                                           "M200,500 h-150 a150,150 0 1,0 150,-150 z",
                                           "fill-color", "red",
                                           "stroke-color", "blue",
                                           "line-width", 5.0,
                                           NULL);

Property Details

The "data" property

  "data"                     gchar*                : Write

The sequence of path commands, specified as a string using the same syntax as in the Scalable Vector Graphics (SVG) path element.

Default value: NULL


The "height" property

  "height"                   gdouble               : Read / Write

The height of the path.

Allowed values: >= 0

Default value: 0


The "width" property

  "width"                    gdouble               : Read / Write

The width of the path.

Allowed values: >= 0

Default value: 0


The "x" property

  "x"                        gdouble               : Read / Write

The x coordinate of the path.

Default value: 0


The "y" property

  "y"                        gdouble               : Read / Write

The y coordinate of the path.

Default value: 0

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