Developer Documentation

simpleGLGraphicsScene.cc
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40 \*===========================================================================*/
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46
47 //=============================================================================
48 //
49 // CLASS SimpleGLGraphicsScene - IMPLEMENTATION
50 //
51 //=============================================================================
52
53 //== INCLUDES =================================================================
54
55 #include <ACG/GL/acg_glew.hh>
56 #include <OpenFlipper/common/GlobalOptions.hh>
57 #include <OpenFlipper/BasePlugin/PluginFunctions.hh>
58 #include <OpenFlipper/widgets/glWidget/QtBaseViewer.hh>
59 #include <QApplication>
60 #include <QPainter>
61 #include <QPaintEngine>
62 #include <QGraphicsSceneMouseEvent>
63
64 #include "simpleGLGraphicsScene.hh"
65
66 //== NAMESPACES ===============================================================
67
68 //== IMPLEMENTATION ===========================================================
69
70 SimpleGLGraphicsScene::SimpleGLGraphicsScene () :
71 QGraphicsScene (),
72 view_(),
73 initialized_(false)
74 {
75 cursorPainter_ = new CursorPainter (this);
76 cursorPainter_->setEnabled( OpenFlipperSettings().value("Core/Gui/glViewer/nativeMouse",false).toBool() );
77 }
78
79
80 void SimpleGLGraphicsScene::drawBackground(QPainter *_painter, const QRectF &_rect)
81 {
82
83 // Check for switch in qt4.6 to OpenGL2
84 if (_painter->paintEngine()->type() != QPaintEngine::OpenGL && _painter->paintEngine()->type() != QPaintEngine::OpenGL2 ) {
85 std::cerr << "QtGLGraphicsScene: drawBackground needs a QGLWidget to be set as viewport on the graphics view\n";
86 return;
87 }
88
89 // Initialize background first
90 _painter->setBackground(QApplication::palette().window());
91 _painter->eraseRect(_rect);
92
93 if (!view_)
94 return;
95
96 // From now on we do OpenGL direct painting on the scene
97 // Tell Qt that we directly use OpenGL
98 _painter->beginNativePainting();
99
100 if (!initialized_)
101 {
102 // we use GLEW to manage extensions
103 // initialize it first
104 #ifndef __APPLE__
105 glewInit();
106 #endif
107 view_->initializeGL();
108 cursorPainter_->initializeGL ();
109 initialized_ = true;
110 }
111
112 if (cursorPainter_->enabled())
113 {
114 // avoid projection matrix stack overflow
115 GLdouble mat[16];
116 glGetDoublev(GL_PROJECTION_MATRIX, mat);
117
118 glMatrixMode(GL_MODELVIEW);
119 glPushMatrix ();
120
121 glPushAttrib (GL_ALL_ATTRIB_BITS);
122 view_->updateCursorPosition(cursorPainter_->cursorPosition ());
123 glPopAttrib ();
124
125 glMatrixMode(GL_PROJECTION);
126 glLoadMatrixd (mat);
127 glMatrixMode(GL_MODELVIEW);
128 glPopMatrix ();
129 glClear(GL_DEPTH_BUFFER_BIT);
130 }
131
132 // Clear the depth buffer (This is required since QT4.6 Otherwise we get an emtpty scene!
133 glClear(GL_DEPTH_BUFFER_BIT);
134
135 view_->paintGL();
136
137 // The rest is painting through QT again.
138 _painter->endNativePainting();
139 }
140
141
142 void SimpleGLGraphicsScene::mouseMoveEvent(QGraphicsSceneMouseEvent* _e)
143 {
144 QGraphicsScene::mouseMoveEvent(_e);
145 if (_e->isAccepted())
146 return;
147
148 if (view_)
149 view_->mouseMoveEvent(_e);
150 }
151
152 void SimpleGLGraphicsScene::setView(glViewer * _view)
153 {
154 view_ = _view;
155 cursorPainter_->registerViewer (view_);
156 }
157
158 //-----------------------------------------------------------------------------
159
160 bool SimpleGLGraphicsScene::event(QEvent *_event)
161 {
162 if (_event->type() == QEvent::Enter)
163 {
164 cursorPainter_->setMouseIn (true);
165 }
166 else if (_event->type() == QEvent::Leave)
167 {
168 cursorPainter_->setMouseIn (false);
169 update ();
170 }
171 else if (cursorPainter_ && _event->type() == QEvent::GraphicsSceneMouseMove)
172 {
173 QGraphicsSceneMouseEvent *e = static_cast<QGraphicsSceneMouseEvent*>(_event);
174 cursorPainter_->updateCursorPosition (e->scenePos ());
175 update ();
176 }
177 return QGraphicsScene::event (_event);
178 }
179
180 //=============================================================================
181 //=============================================================================
182
183
CursorPainter
Definition: CursorPainter.hh:68
GlobalOptions.hh
PluginFunctions.hh
glViewer
Definition: QtBaseViewer.hh:126
OpenFlipperSettings
DLLEXPORT OpenFlipperQSettings & OpenFlipperSettings()
QSettings object containing all program settings of OpenFlipper.
Definition: GlobalOptions.cc:1038