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GooCanvasPathModel

GooCanvasPathModel — a model for path items (a series of lines and curves).

Synopsis

                    GooCanvasPathModel;
GooCanvasItemModel* goo_canvas_path_model_new           (GooCanvasItemModel *parent,
                                                         const gchar *path_data,
                                                         ...);

Object Hierarchy

  GObject
   +----GooCanvasItemModelSimple
         +----GooCanvasPathModel

Implemented Interfaces

GooCanvasPathModel implements GooCanvasItemModel.

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.

parent :

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.

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 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);

Property Details

The "data" property

  "data"                     gchar*                : Write

The sequence of path commands.

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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