70 lines
1.9 KiB
C++
70 lines
1.9 KiB
C++
///@file
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/// Visitor for traversing a canvas element hierarchy similar to the traversal
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/// of the DOM Level 3 Event Model
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//
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// Copyright (C) 2012 Thomas Geymayer <tomgey@gmail.com>
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//
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// This library is free software; you can redistribute it and/or
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// modify it under the terms of the GNU Library General Public
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// License as published by the Free Software Foundation; either
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// version 2 of the License, or (at your option) any later version.
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//
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// This library 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 GNU
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// Library General Public License for more details.
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//
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// You should have received a copy of the GNU Library General Public
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// License along with this library; if not, write to the Free Software
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// Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
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#ifndef CANVAS_EVENT_VISITOR_HXX_
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#define CANVAS_EVENT_VISITOR_HXX_
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#include "canvas_fwd.hxx"
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#include "CanvasEventManager.hxx"
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namespace simgear
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{
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namespace canvas
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{
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class EventVisitor
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{
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public:
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enum TraverseMode
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{
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TRAVERSE_UP,
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TRAVERSE_DOWN
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};
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/**
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*
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* @param mode
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* @param pos Mouse position
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* @param root Element to dispatch events to if no element is hit
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*/
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EventVisitor( TraverseMode mode,
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const osg::Vec2f& pos,
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const ElementPtr& root = ElementPtr() );
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virtual ~EventVisitor();
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virtual bool traverse(Element& el);
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virtual bool apply(Element& el);
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const EventPropagationPath& getPropagationPath() const;
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protected:
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TraverseMode _traverse_mode;
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EventPropagationPath _target_path;
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ElementPtr _root;
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};
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} // namespace canvas
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} // namespace simgear
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#endif /* CANVAS_EVENTVISITOR_HXX_ */
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