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GooCanvas Reference Manual |  |
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| Top | Description | Object Hierarchy | Implemented Interfaces | Properties | ||||
Synopsis
GooCanvasPathModel; GooCanvasItemModel* goo_canvas_path_model_new (GooCanvasItemModel *parent,const gchar *path_data,...);
Properties
"data" gchar* : Write "height" gdouble : Read / Write "width" gdouble : Read / Write "x" gdouble : Read / Write "y" gdouble : Read / Write
Description
GooCanvasPathModel represents a model for path items, which are a series of one or more lines, bezier curves, or elliptical arcs.
It is a subclass of GooCanvasItemModelSimple and so inherits all of the style properties such as "stroke-color", "fill-color" and "line-width".
It also implements the GooCanvasItemModel interface, so you can use the
GooCanvasItemModel functions such as goo_canvas_item_model_raise() and
goo_canvas_item_model_rotate().
GooCanvasPathModel uses the same path specification strings as the Scalable Vector Graphics (SVG) path element. For details see the SVG specification.
To create a GooCanvasPathModel use goo_canvas_path_model_new().
To get or set the properties of an existing GooCanvasPathModel, use
g_object_get() and g_object_set().
To respond to events such as mouse clicks on the path you must connect
to the signal handlers of the corresponding GooCanvasPath objects.
(See goo_canvas_get_item() and "item-created".)
Details
GooCanvasPathModel
typedef struct _GooCanvasPathModel GooCanvasPathModel;
The GooCanvasPathModel struct contains private data only.
goo_canvas_path_model_new ()
GooCanvasItemModel* goo_canvas_path_model_new (GooCanvasItemModel *parent,const gchar *path_data,...);
Creates a new path model.
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the parent model, 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.
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the sequence of path commands, specified as a string using the same syntax as in the Scalable Vector Graphics (SVG) path element. |
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optional pairs of property names and values, and a terminating NULL.
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Returns : |
a new path model. |
Here's an example showing how to create a red line from (20,20) to (40,40):
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GooCanvasItemModel *path = goo_canvas_path_model_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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GooCanvasItemModel *path = goo_canvas_path_model_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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GooCanvasItemModel *path = goo_canvas_path_model_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); |