1 // Manage event handling inside a Canvas similar to the DOM Level 3 Event Model
3 // Copyright (C) 2012 Thomas Geymayer <tomgey@gmail.com>
5 // This library is free software; you can redistribute it and/or
6 // modify it under the terms of the GNU Library General Public
7 // License as published by the Free Software Foundation; either
8 // version 2 of the License, or (at your option) any later version.
10 // This library 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 GNU
13 // Library General Public License for more details.
15 // You should have received a copy of the GNU Library General Public
16 // License along with this library; if not, write to the Free Software
17 // Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
19 #ifndef CANVAS_EVENT_MANAGER_HXX_
20 #define CANVAS_EVENT_MANAGER_HXX_
22 #include "canvas_fwd.hxx"
32 ElementWeakPtr element;
36 typedef std::deque<EventTarget> EventPropagationPath;
37 inline bool operator==(const EventTarget& t1, const EventTarget& t2)
39 return t1.element.lock() == t2.element.lock();
47 bool handleEvent( const MouseEventPtr& event,
48 const EventPropagationPath& path );
51 struct StampedPropagationPath
53 StampedPropagationPath();
54 StampedPropagationPath(const EventPropagationPath& path, double time);
59 EventPropagationPath path;
63 // TODO if we really need the paths modify to not copy around the paths
65 StampedPropagationPath _last_mouse_down,
68 size_t _current_click_count;
71 * Propagate click event and handle multi-click (eg. create dblclick)
73 bool handleClick( const MouseEventPtr& event,
74 const EventPropagationPath& path );
77 * Handle mouseover/enter/out/leave
79 bool handleMove( const MouseEventPtr& event,
80 const EventPropagationPath& path );
82 bool propagateEvent( const EventPtr& event,
83 const EventPropagationPath& path );
86 * Check if two click events (either mousedown/up or two consecutive
87 * clicks) are inside a maximum distance to still create a click or
88 * dblclick event respectively.
90 bool checkClickDistance( const EventPropagationPath& path1,
91 const EventPropagationPath& path2 ) const;
93 getCommonAncestor( const EventPropagationPath& path1,
94 const EventPropagationPath& path2 ) const;
98 } // namespace simgear
100 #endif /* CANVAS_EVENT_MANAGER_HXX_ */