GooCanvasEllipse

GooCanvasEllipse — an ellipse item.

Synopsis


#include <goocanvas.h>


            GooCanvasEllipse;

GooCanvasItem* goo_canvas_ellipse_new       (GooCanvasItem *parent,
                                             gdouble center_x,
                                             gdouble center_y,
                                             gdouble radius_x,
                                             gdouble radius_y,
                                             const gchar *first_property,
                                             ...);

Object Hierarchy


  GObject
   +----GooCanvasItemSimple
         +----GooCanvasEllipse

Implemented Interfaces

GooCanvasEllipse implements GooCanvasItem.

Properties


  "center-x"             gdouble               : Read / Write
  "center-y"             gdouble               : Read / Write
  "radius-x"             gdouble               : Read / Write
  "radius-y"             gdouble               : Read / Write

Description

GooCanvasEllipse represents an ellipse item.

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().

To create a GooCanvasEllipse use goo_canvas_ellipse_new().

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

To respond to events such as mouse clicks on the ellipse you must connect to the signal handlers of the corresponding GooCanvasEllipseView objects. (See goo_canvas_view_get_item_view() and GooCanvasView::item-view-created.)

Details

GooCanvasEllipse

typedef struct _GooCanvasEllipse GooCanvasEllipse;

The GooCanvasEllipse struct contains private data only.

goo_canvas_ellipse_new ()

GooCanvasItem* goo_canvas_ellipse_new       (GooCanvasItem *parent,
                                             gdouble center_x,
                                             gdouble center_y,
                                             gdouble radius_x,
                                             gdouble radius_y,
                                             const gchar *first_property,
                                             ...);

Creates a new ellipse 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.
center_x : the x coordinate of the center of the ellipse.
center_y : the y coordinate of the center of the ellipse.
radius_x : the horizontal radius of the ellipse.
radius_y : the vertical radius of the ellipse.
first_property : the name of the first property to set, or NULL.
... : the remaining property names and values to set, terminated with a NULL.
Returns : a new ellipse item.

Here's an example showing how to create an ellipse centered at (100.0, 100.0), with a horizontal radius of 50.0 and a vertical radius of 30.0. It is drawn with a red outline with a width of 5.0 and filled with blue: 

 GooCanvasItem *ellipse = goo_canvas_ellipse_new (mygroup, 100.0, 100.0, 50.0, 30.0,
                                                  "stroke-color", "red",
                                                  "line-width", 5.0,
                                                  "fill-color", "blue",
                                                  NULL);

Property Details

The "center-x" property

  "center-x"             gdouble               : Read / Write

The x coordinate of the center of the ellipse.

Default value: 0

The "center-y" property

  "center-y"             gdouble               : Read / Write

The y coordinate of the center of the ellipse.

Default value: 0

The "radius-x" property

  "radius-x"             gdouble               : Read / Write

The horizontal radius of the ellipse.

Allowed values: >= 0

Default value: 0

The "radius-y" property

  "radius-y"             gdouble               : Read / Write

The vertical radius of the ellipse.

Allowed values: >= 0

Default value: 0