root/OpenSceneGraph/trunk/include/osgWidget/ViewerEventHandlers @ 13041

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1/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2008 Robert Osfield
2 *
3 * This library is open source and may be redistributed and/or modified under
4 * the terms of the OpenSceneGraph Public License (OSGPL) version 0.0 or
5 * (at your option) any later version.  The full license is in LICENSE file
6 * included with this distribution, and on the openscenegraph.org website.
7 *
8 * This library is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
11 * OpenSceneGraph Public License for more details.
12*/
13
14// Code by: Jeremy Moles (cubicool) 2007-2008
15
16#ifndef OSGWIDGET_VIEWER_EVENT_HANDLERS
17#define OSGWIDGET_VIEWER_EVENT_HANDLERS
18
19#include <osgGA/GUIEventAdapter>
20#include <osgGA/GUIEventHandler>
21#include <osgWidget/WindowManager>
22
23// NOTE! These are all just examples of some default event handlers--they are not
24// required. You are more than welcome to provide your own even handlers that
25// communicate with a WindowManager using it's public API.
26
27namespace osgWidget {
28
29// This handles the pressing/moving of mouse buttons, etc.
30class OSGWIDGET_EXPORT MouseHandler: public osgGA::GUIEventHandler
31{
32    public:
33
34        MouseHandler(WindowManager*);
35
36        virtual bool handle(
37            const osgGA::GUIEventAdapter&,
38            osgGA::GUIActionAdapter&,
39            osg::Object*,
40            osg::NodeVisitor*
41        );
42
43
44        typedef bool (MouseHandler::*MouseAction)(float, float, int);
45        typedef bool (WindowManager::*MouseEvent)(float, float);
46
47    protected:
48
49        osg::observer_ptr<WindowManager> _wm;
50
51        bool _handleMousePush        (float, float, int);
52        bool _handleMouseRelease     (float, float, int);
53        bool _handleMouseDoubleClick (float, float, int);
54        bool _handleMouseDrag        (float, float, int);
55        bool _handleMouseMove        (float, float, int);
56        bool _handleMouseScroll      (float, float, int);
57
58        MouseAction _isMouseEvent (osgGA::GUIEventAdapter::EventType) const;
59        bool        _doMouseEvent (float, float, MouseEvent);
60};
61
62// This handles the forwarding of keypress events.
63class OSGWIDGET_EXPORT KeyboardHandler: public osgGA::GUIEventHandler
64{
65    public:
66
67        KeyboardHandler(WindowManager*);
68
69        virtual bool handle(
70            const osgGA::GUIEventAdapter&,
71            osgGA::GUIActionAdapter&,
72            osg::Object*,
73            osg::NodeVisitor*
74        );
75
76    protected:
77        osg::observer_ptr<WindowManager> _wm;
78
79};
80
81// This class offers a default kind of handling for resizing.
82class OSGWIDGET_EXPORT ResizeHandler: public osgGA::GUIEventHandler
83{
84    public:
85
86        ResizeHandler(WindowManager*, osg::Camera* = 0);
87
88        virtual bool handle(
89            const osgGA::GUIEventAdapter&,
90            osgGA::GUIActionAdapter&,
91            osg::Object*,
92            osg::NodeVisitor*
93        );
94
95    protected:
96
97        osg::observer_ptr<WindowManager> _wm;
98        osg::observer_ptr<osg::Camera>   _camera;
99};
100
101// This class provides a hotkey that lets you toggle back and forth between
102// a camera and setting the CameraManipulator's home point.
103class OSGWIDGET_EXPORT CameraSwitchHandler: public osgGA::GUIEventHandler
104{
105    public:
106
107        CameraSwitchHandler(WindowManager*, osg::Camera*);
108
109        virtual bool handle(
110            const osgGA::GUIEventAdapter&,
111            osgGA::GUIActionAdapter&,
112            osg::Object*,
113            osg::NodeVisitor*
114        );
115
116    protected:
117
118        osg::observer_ptr<WindowManager> _wm;
119        osg::observer_ptr<osg::Camera>   _camera;
120        osg::ref_ptr<osg::Node>          _oldNode;
121};
122
123}
124
125#endif
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