mouseeventmanager.h

00001 /*
00002  * Orca-Robotics Project: Components for robotics 
00003  *               http://orca-robotics.sf.net/
00004  * Copyright (c) 2004-2009 Alex Brooks, Alexei Makarenko, Tobias Kaupp
00005  *
00006  * This copy of Orca is licensed to you under the terms described in
00007  * the LICENSE file included in this distribution.
00008  *
00009  */
00010 
00011 #ifndef HYDROQGUI_MOUSEEVENTMANAGER_H
00012 #define HYDROQGUI_MOUSEEVENTMANAGER_H
00013 
00014 #include <hydroutil/uncopyable.h>
00015 
00016 namespace hydroqguielementutil {
00017 
00018 class GuiElement;
00019 
00027 class MouseEventManager : public hydroutil::Uncopyable
00028 {
00029 
00030 public: 
00031 
00032     MouseEventManager()
00033         : mouseEventReceiver_(NULL)
00034         {}
00035 
00036     bool mouseEventReceiverIsSet() const { return mouseEventReceiver_!=NULL; }
00037 
00038     GuiElement *mouseEventReceiver() const { return mouseEventReceiver_; }
00039 
00040     bool requestBecomeMouseEventReceiver( GuiElement *requester );
00041 
00042     void relinquishMouseEventReceiver( GuiElement *relinquisher );
00043 
00044 private: 
00045 
00046     // NULL means no-one is receiving mouse events
00047     GuiElement *mouseEventReceiver_;
00048 
00049 };
00050 
00051 }
00052 
00053 #endif