goc_item_bounds_changed ()

void
goc_item_bounds_changed (GocItem *item);

This function needs to be called each time the bounds of item change. It is normally called from inside the implementation of items derived classes.

goc_item_destroy ()

void
goc_item_destroy (GocItem *item);

Destroys item , removes it from its parent group and updates the canvas accordingly.

goc_item_distance ()

double
goc_item_distance (GocItem *item,
                   double x,
                   double y,
                   GocItem **near_item);

Evaluates the distance between the point with canvas coordinates x ,y and the nearest point of item . near_item is set with either item or its appropriate child.

goc_item_draw ()

void
goc_item_draw (GocItem const *item,
               cairo_t *cr);

Renders item using cr . There is no need to call this function directly. Invalidating the item is the way to go.

goc_item_draw_region ()

gboolean
goc_item_draw_region (GocItem const *item,
                      cairo_t *cr,
                      double x0,
                      double y0,
                      double x1,
                      double y1);

Renders item using cr , limiting all drawings to the region limited by x0 , y0 , x1 , and y1 . If this function returns FALSE, goc_item_draw should be called. There is no need to call this function directly. Invalidating the item is the way to go.

goc_item_get_bounds ()

void
goc_item_get_bounds (GocItem const *item,
                     double *x0,
                     double *y0,
                     double *x1,
                     double *y1);

Retrieves the bounds of item in canvas coordinates.

goc_item_get_operator ()

cairo_operator_t
goc_item_get_operator (GocItem *item);

goc_item_get_parent ()

GocGroup *
goc_item_get_parent (GocItem *item);

goc_item_get_style_context ()

GtkStyleContext *
goc_item_get_style_context (const GocItem *item);

goc_item_get_window ()

GdkWindow *
goc_item_get_window (GocItem *item);

goc_item_grab ()

void
goc_item_grab (GocItem *item);

Grabs the item. This function will fail if another item is grabbed.

goc_item_hide ()

void
goc_item_hide (GocItem *item);

Hides item .

goc_item_invalidate ()

void
goc_item_invalidate (GocItem *item);

Force a redraw of item bounding region.

goc_item_is_visible ()

gboolean
goc_item_is_visible (GocItem *item);

goc_item_lower ()

void
goc_item_lower (GocItem *item,
                int n);

Lowers item by n steps inside its parent GocGroup (or less if the list is too short) in the item list so that it is displayed more deeply in the items stack.

goc_item_lower_to_bottom ()

void
goc_item_lower_to_bottom (GocItem *item);

Lowers item to bottom inside its parent GocGroup so that it will be at least partly hidden by any overlapping item.

goc_item_new ()

GocItem *
goc_item_new (GocGroup *parent,
              GType type,
              const gchar *first_arg_name,
              ...);

Creates a new item of type type in group group . Properties can be set just the same way they are in g_object_new.

goc_item_raise ()

void
goc_item_raise (GocItem *item,
                int n);

Raises item by n steps inside its parent GocGroup (or less if the list is too short) in the item list so that it is displayed nearer the top of the items stack.

goc_item_raise_to_top ()

void
goc_item_raise_to_top (GocItem *item);

Raises item to front so that it becomes the toplevel item inside its parent GocGroup.

goc_item_set ()

void
goc_item_set (GocItem *item,
              const gchar *first_arg_name,
              ...);

Set properties and updates the canvas. Using g_object_set instead would set the properties, but not update the canvas.

goc_item_set_operator ()

void
goc_item_set_operator (GocItem *item,
                       cairo_operator_t op);

Set the operator used when drawing the item.

goc_item_set_transform ()

void
goc_item_set_transform (GocItem *item,
                        cairo_matrix_t *m);

Set the matrix used to transform the item.

goc_item_set_visible ()

void
goc_item_set_visible (GocItem *item,
                      gboolean visible);

Either hides or shows item as appropriate..

goc_item_show ()

void
goc_item_show (GocItem *item);

Makes item visible.

goc_item_ungrab ()

void
goc_item_ungrab (GocItem *item);

Ungrabs the item. This function will fail if item is not grabbed.

GocItem

typedef struct _GocItem GocItem;

struct GocItemClass

struct GocItemClass {
	GObjectClass	 base;

	double			(*distance) (GocItem *item,
					     double x, double y, GocItem **near_item);
	void			(*draw) (GocItem const *item, cairo_t *cr);
	gboolean		(*draw_region) (GocItem const *item, cairo_t *cr,
						double x0, double y0, double x1, double y1);
	void			(*update_bounds) (GocItem *item);
	/* events related functions */
	gboolean		(*button_pressed) (GocItem *item, int button, double x, double y);
	gboolean		(*button2_pressed) (GocItem *item, int button, double x, double y);
	gboolean		(*button_released) (GocItem *item, int button, double x, double y);
	gboolean		(*motion) (GocItem *item, double x, double y);
	gboolean		(*enter_notify) (GocItem *item, double x, double y);
	gboolean		(*leave_notify) (GocItem *item, double x, double y);
	void			(*realize) (GocItem *item);
	void			(*unrealize) (GocItem *item);
	void			(*notify_scrolled) (GocItem *item);
#ifdef GOFFICE_WITH_GTK
	gboolean		(*key_pressed) (GocItem *item, GdkEventKey* ev);
	gboolean		(*key_released) (GocItem *item, GdkEventKey* ev);
	GdkWindow*		(*get_window) (GocItem *item);
#endif
};

The base class for all canvas items.

The “canvas” property

  “canvas”                   GocCanvas *

The canvas object on which the item resides.

Flags: Read

The “parent” property

  “parent”                   GocGroup *

The group in which the item resides.

Flags: Read