2 Copyright (C) 2008 Paul Davis
5 This program is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published by
7 the Free Software Foundation; either version 2 of the License, or
8 (at your option) any later version.
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with this program; if not, write to the Free Software
17 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
20 #ifndef __ardour_interactive_item_h__
21 #define __ardour_interactive_item_h__
23 #include <libgnomecanvasmm/text.h>
24 #include "simplerect.h"
30 /** A canvas item that handles events.
31 * This is required so ardour can custom deliver events to specific items
32 * (e.g. to delineate scroll events) since Gnome::Canvas::Item::on_event
35 class InteractiveItem {
37 virtual bool on_event(GdkEvent* ev) = 0;
40 /** A canvas text that forwards events to its parent.
42 class InteractiveText : public Text, public InteractiveItem {
44 InteractiveText(Group& parent, InteractiveItem* parent_item, double x, double y, const Glib::ustring& text)
45 : Text(parent, x, y, text)
46 , _parent_item(parent_item)
49 InteractiveText(Group& parent, InteractiveItem* parent_item)
51 , _parent_item(parent_item)
54 bool on_event(GdkEvent* ev) {
56 return _parent_item->on_event(ev);
63 InteractiveItem* _parent_item;
66 class InteractiveRect: public SimpleRect, public InteractiveItem
69 InteractiveRect(Group& parent, InteractiveItem* parent_item,
70 double x1, double y1, double x2, double y2)
71 : SimpleRect(parent, x1, y1, x2, y2)
72 , _parent_item(parent_item)
75 bool on_event(GdkEvent* ev) {
77 return _parent_item->on_event(ev);
85 InteractiveItem* _parent_item;
88 } /* namespace Canvas */
89 } /* namespace Gnome */
91 #endif /* __ardour_interactive_item_h__ */