started qt6 migration

src/OpenMesh/Apps/QtViewer/CMakeLists.txt

@@ -30,7 +30,7 @@ endif ()
 target_link_libraries (QtViewer
   OpenMeshCore
   OpenMeshTools
-  Qt5::OpenGL
+  ${QT_TARGET}::OpenGL
   ${OPENGL_LIBRARIES}
 )
 

src/OpenMesh/Apps/QtViewer/MeshViewerWidgetT_impl.hh

@@ -233,7 +233,7 @@ bool MeshViewerWidgetT<M>::set_texture( QImage& _texsrc )
     _texsrc = _texsrc.scaled( tex_w, tex_h, Qt::IgnoreAspectRatio, Qt::SmoothTransformation );
   }
 
-  QImage texture( QGLWidget::convertToGLFormat ( _texsrc ) );
+  QImage texture = _texsrc.convertToFormat(QImage::Format_ARGB32).rgbSwapped();
   
   glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
   glPixelStorei(GL_UNPACK_SKIP_ROWS,   0);

src/OpenMesh/Apps/QtViewer/QGLViewerWidget.cc

@@ -60,6 +60,7 @@
 #include <QImage>
 #include <QDateTime>
 #include <QMouseEvent>
+#include <QActionGroup>
 // --------------------
 #include <OpenMesh/Apps/QtViewer/QGLViewerWidget.hh>
 #include <OpenMesh/Tools/Utils/Timer.hh>
@@ -68,6 +69,10 @@
 #  define M_PI 3.1415926535897932
 #endif
 
+#if QT_VERSION_MAJOR > 5
+#define swapBuffers()
+#endif
+
 const double TRACKBALL_RADIUS = 0.6;
 
 
@@ -81,21 +86,22 @@ std::string QGLViewerWidget::nomode_ = "";
 
 //----------------------------------------------------------------------------
 
-QGLViewerWidget::QGLViewerWidget( QWidget* _parent )
-  : QGLWidget( _parent )
+#if QT_VERSION_MAJOR < 6
+QGLViewerWidget::QGLViewerWidget( QWidget* _parent ) : QGLWidget( _parent )
+#else
+QGLViewerWidget::QGLViewerWidget( QWidget* _parent ) : QOpenGLWidget( _parent )
+#endif
 {    
   init();
 }
 
-//----------------------------------------------------------------------------
+//---------------------------------------------------------------------------
 
-QGLViewerWidget::
-QGLViewerWidget( QGLFormat& _fmt, QWidget* _parent )
-  : QGLWidget( _fmt, _parent )
-{
-  init();
+#if QT_VERSION_MAJOR > 5
+void QGLViewerWidget::updateGL() {
+    update();
 }
-
+#endif
 
 //----------------------------------------------------------------------------
 
@@ -330,7 +336,7 @@ QGLViewerWidget::mouseMoveEvent( QMouseEvent* _event )
 
   
   // move in z direction
-  if ( (_event->buttons() == (LeftButton+MidButton)) ||
+  if ( (_event->buttons() == (LeftButton|MiddleButton)) ||
 	  (_event->buttons() == LeftButton && _event->modifiers() == ControlModifier))
   {
     float value_y = radius_ * dy * 3.0 / h;
@@ -339,7 +345,7 @@ QGLViewerWidget::mouseMoveEvent( QMouseEvent* _event )
 	
 
   // move in x,y direction
-  else if ( (_event->buttons() == MidButton) ||
+  else if ( (_event->buttons() == MiddleButton) ||
 			(_event->buttons() == LeftButton && _event->modifiers() == AltModifier) )
   {
     float z = - (modelview_matrix_[ 2]*center_[0] + 
@@ -417,7 +423,7 @@ void QGLViewerWidget::wheelEvent(QWheelEvent* _event)
 {
   // Use the mouse wheel to zoom in/out
 
-  float d = -(float)_event->delta() / 120.0 * 0.2 * radius_;
+  float d = -(float)( _event->angleDelta().y() / 120.0 * 0.2 * radius_ );
   translate(Vec3f(0.0, 0.0, d));
   updateGL();
   _event->accept();

src/OpenMesh/Apps/QtViewer/QGLViewerWidget.hh

@@ -47,14 +47,15 @@
 
 
 //== INCLUDES =================================================================
-
-
 #include <OpenMesh/Core/Geometry/VectorT.hh>
-#include <QGLWidget>
 #include <string>
 #include <vector>
 #include <map>
-
+#if QT_VERSION_MAJOR < 6
+    #include <QGLWidget>
+#else
+    #include <QtOpenGLWidgets/QOpenGLWidget>
+#endif
 
 //== FORWARD DECLARATIONS =====================================================
 
@@ -64,21 +65,25 @@ class QAction;
 
 //== CLASS DEFINITION =========================================================
 
-  
+#if QT_VERSION_MAJOR < 6
 class QGLViewerWidget : public QGLWidget
+#else
+class QGLViewerWidget : public QOpenGLWidget
+#endif
 {
-
   Q_OBJECT
+
   
 public:
+  #if QT_VERSION_MAJOR < 6
   typedef QGLWidget Super;
+  #else
+  typedef QOpenGLWidget Super;
+  #endif
    
   // Default constructor.
   explicit QGLViewerWidget( QWidget* _parent=0 );
 
-  // 
-  QGLViewerWidget( QGLFormat& _fmt, QWidget* _parent=0 );
-
   // Destructor.
   virtual ~QGLViewerWidget();
 
@@ -88,6 +93,11 @@ private:
 
 public:
 
+#if QT_VERSION_MAJOR > 5
+  /* Updates the gui - used to provide backwards compability */
+  void updateGL();
+#endif
+
   /* Sets the center and size of the whole scene. 
      The _center is used as fixpoint for rotations and for adjusting
      the camera/viewer (see view_all()). */

src/OpenMesh/Apps/QtViewer/meshviewer.cc

@@ -44,12 +44,16 @@
 #endif
 
 #include <iostream>
+
 #include <fstream>
 #include <QApplication>
 #include <QMessageBox>
 #include <QMainWindow>
 #include <QMenuBar>
 #include <QFileDialog>
+#if QT_VERSION_MAJOR > 5
+#include <QOpenGLContext>
+#endif
 
 #include "MeshViewerWidget.hh"
 
@@ -62,7 +66,11 @@ int main(int argc, char **argv)
   // OpenGL check
   QApplication app(argc,argv);
 
-  if ( !QGLFormat::hasOpenGL() ) {
+#if QT_VERSION_MAJOR < 6
+    if ( !QGLFormat::hasOpenGL() ) {
+#else
+    if ( QOpenGLContext::openGLModuleType() != QOpenGLContext::LibGL ) {
+#endif
     QString msg = "System has no OpenGL support!";
     QMessageBox::critical( nullptr, QString("OpenGL"), msg + QString(argv[1]) );
     return -1;