| Libgnomedb 4.0 Reference Manual | ||||
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GnomeDbCanvasItemGnomeDbCanvasItem — Base class for all the GnomeCanvasItem derived widgets in libgnomedb. |
GnomeDbCanvasItem;
GnomeDbCanvasItemClass;
GnomeDbCanvas* gnome_db_canvas_item_get_canvas (GnomeDbCanvasItem *item);
GnomeDbGraphItem* gnome_db_canvas_item_get_graph_item (GnomeDbCanvasItem *item);
void gnome_db_canvas_item_get_edge_nodes (GnomeDbCanvasItem *item,
GnomeDbCanvasItem **from,
GnomeDbCanvasItem **to);
GObject +----GooCanvasItemSimple +----GooCanvasGroup +----GnomeDbCanvasItem +----GnomeDbCanvasText +----GnomeDbCanvasCursor +----GnomeDbCanvasFkey +----GnomeDbCanvasTable
"allow-drag" gboolean : Read / Write "allow-move" gboolean : Read / Write "graph-item" GnomeDbGraphItem* : Read / Write "tip-text" gchar* : Read / Write
"destroy" : Run First "drag-action" : Run First "moved" : Run First "moving" : Run First "shifted" : Run First
This object adds some functionnalities on top of the GnomeCanvasItem objects such as synchronisation with a GdaGraphItem object (to have a persistent position on the canvas), the ability to be moved on the canvas, and the ability to initiate and report simple drag and drop within the canvas.
typedef struct {
GooCanvasGroupClass parent_class;
/* signals */
void (*moved) (GnomeDbCanvasItem *citem);
void (*moving) (GnomeDbCanvasItem *citem);
void (*shifted) (GnomeDbCanvasItem *citem);
void (*drag_action) (GnomeDbCanvasItem *citem, GnomeDbCanvasItem * dragged_from, GnomeDbCanvasItem * dragged_to);
void (*destroy) (GnomeDbCanvasItem *citem);
/* virtual functions */
void (*extra_event) (GnomeDbCanvasItem *citem, GdkEventType event_type);
void (*get_edge_nodes)(GnomeDbCanvasItem *citem, GnomeDbCanvasItem **from, GnomeDbCanvasItem **to);
} GnomeDbCanvasItemClass;
GnomeDbCanvas* gnome_db_canvas_item_get_canvas (GnomeDbCanvasItem *item);
Get the GnomeDbCanvas on which item is drawn
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a GnomeDbCanvasItem object |
Returns : |
the GnomeDbCanvas widget |
GnomeDbGraphItem* gnome_db_canvas_item_get_graph_item (GnomeDbCanvasItem *item);
Get the associated GnomeDbGraphItem to item.
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a GnomeDbCanvasItem object |
Returns : |
the GnomeDbGraphItem, or NULL
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void gnome_db_canvas_item_get_edge_nodes (GnomeDbCanvasItem *item, GnomeDbCanvasItem **from, GnomeDbCanvasItem **to);
If the item canvas item represents a "link" between two other canvas items (an edge), then
set from and to to those items.
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a GnomeDbCanvasItem object |
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a place to store the FROM part of the edge, or NULL
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a place to store the TO part of the edge, or NULL
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"destroy" signalvoid user_function (GnomeDbCanvasItem *dbcanvasitem, gpointer user_data) : Run First
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the object which received the signal. |
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user data set when the signal handler was connected. |
"drag-action" signalvoid user_function (GnomeDbCanvasItem *dbcanvasitem, gpointer arg1, gpointer arg2, gpointer user_data) : Run First
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the object which received the signal. |
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user data set when the signal handler was connected. |
"moved" signalvoid user_function (GnomeDbCanvasItem *dbcanvasitem, gpointer user_data) : Run First
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the object which received the signal. |
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user data set when the signal handler was connected. |
"moving" signalvoid user_function (GnomeDbCanvasItem *dbcanvasitem, gpointer user_data) : Run First
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the object which received the signal. |
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user data set when the signal handler was connected. |
"shifted" signalvoid user_function (GnomeDbCanvasItem *dbcanvasitem, gpointer user_data) : Run First
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the object which received the signal. |
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user data set when the signal handler was connected. |