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 ~InteractiveItem() {}
39 virtual bool on_event(GdkEvent* ev) = 0;
42 /** A canvas text that forwards events to its parent.
44 class InteractiveText : public Text, public InteractiveItem {
46 InteractiveText(Group& parent, InteractiveItem* parent_item, double x, double y, const Glib::ustring& text)
47 : Text(parent, x, y, text)
48 , _parent_item(parent_item)
51 InteractiveText(Group& parent, InteractiveItem* parent_item)
53 , _parent_item(parent_item)
56 bool on_event(GdkEvent* ev) {
58 return _parent_item->on_event(ev);
65 InteractiveItem* _parent_item;
68 class InteractiveRect: public SimpleRect, public InteractiveItem
71 InteractiveRect(Group& parent, InteractiveItem* parent_item,
72 double x1, double y1, double x2, double y2)
73 : SimpleRect(parent, x1, y1, x2, y2)
74 , _parent_item(parent_item)
77 bool on_event(GdkEvent* ev) {
79 return _parent_item->on_event(ev);
87 InteractiveItem* _parent_item;
90 } /* namespace Canvas */
91 } /* namespace Gnome */
93 #endif /* __ardour_interactive_item_h__ */