acf19ca513
git-svn-id: svn://localhost/ardour2/branches/3.0@4346 d708f5d6-7413-0410-9779-e7cbd77b26cf
91 lines
2.3 KiB
C++
91 lines
2.3 KiB
C++
/*
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Copyright (C) 2008 Paul Davis
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Author: Dave Robillard
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#ifndef __ardour_interactive_item_h__
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#define __ardour_interactive_item_h__
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#include <libgnomecanvasmm/text.h>
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#include "simplerect.h"
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namespace Gnome {
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namespace Canvas {
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/** A canvas item that handles events.
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* This is required so ardour can custom deliver events to specific items
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* (e.g. to delineate scroll events) since Gnome::Canvas::Item::on_event
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* is protected.
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*/
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class InteractiveItem {
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public:
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virtual bool on_event(GdkEvent* ev) = 0;
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};
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/** A canvas text that forwards events to its parent.
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*/
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class InteractiveText : public Text, public InteractiveItem {
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public:
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InteractiveText(Group& parent, InteractiveItem* parent_item, double x, double y, const Glib::ustring& text)
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: Text(parent, x, y, text)
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, _parent_item(parent_item)
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{}
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InteractiveText(Group& parent, InteractiveItem* parent_item)
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: Text(parent)
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, _parent_item(parent_item)
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{}
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bool on_event(GdkEvent* ev) {
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if(_parent_item) {
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return _parent_item->on_event(ev);
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} else {
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return false;
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}
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}
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protected:
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InteractiveItem* _parent_item;
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};
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class InteractiveRect: public SimpleRect, public InteractiveItem
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{
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public:
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InteractiveRect(Group& parent, InteractiveItem* parent_item, double x1, double y1, double x2, double y2)
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: SimpleRect(parent, x1, y1, x2, y2)
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, _parent_item(parent_item)
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{}
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bool on_event(GdkEvent* ev) {
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if(_parent_item) {
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return _parent_item->on_event(ev);
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} else {
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return false;
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}
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}
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protected:
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InteractiveItem* _parent_item;
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};
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} /* namespace Canvas */
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} /* namespace Gnome */
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#endif /* __ardour_interactive_item_h__ */
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