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/*propierties from obj*/  canvas_item_signals[BUTTON_PRESS_EVENT] =          g_signal_new ("item_button_press_event",		        G_TYPE_FROM_CLASS (klass),		        G_SIGNAL_RUN_LAST,		        NULL,//G_STRUCT_OFFSET(DiaCanvasItemClass, button_press_event),		        NULL, NULL,		        dia_marshal_VOID__VOID,		        G_TYPE_NONE, 0);/*the signal is emited ..*/void dia_canvas_item_button_press_event(DiaCanvasItem* item,void* event){   //gboolean result = FALSE;   g_signal_emit (item, canvas_item_signals[BUTTON_PRESS_EVENT],0);   //return result; }/*---------------------*//*signal catched*/g_signal_connect (item3, "item_button_press_event", G_CALLBACK (todos_eventos),item3 );