Qt4-preview-feedback Archive, February 2007
QPainter over QGLWidget.?
Message 1 in thread
Hi ,
I succeed to put the COIN 3d scene graph contents in the QGLWidget. But
after that I can not draw with QPainter over it as usual. Does anybody has
answer of that?
Thanks
Julian
Here some dummy source.
#include <Inventor/Qt/SoQt.h>
#include <Inventor/Qt/SoQtRenderArea.h>
#include <Inventor/nodes/SoCone.h>
#include <Inventor/nodes/SoDirectionalLight.h>
#include <Inventor/nodes/SoPerspectiveCamera.h>
#include <Inventor/nodes/SoSeparator.h>
#include <QGLWidget>
#include <QPainter>
#include <QApplication>
class MyGLView : public QGLWidget {
public:
MyGLView(QWidget * parent) : QGLWidget(parent)
{
// Container widget for the SoQtRenderArea.
QWidget * container = new QWidget(this);
container->resize(300,300);
// Construct a simple scenegraph.
SoSeparator * root = new SoSeparator;
SoDirectionalLight * light = new SoDirectionalLight;
light->direction.setValue(-0.5, -0.5, -0.8);
root->addChild(light);
SoPerspectiveCamera * camera = new SoPerspectiveCamera;
camera->orientation = SbRotation(SbVec3f(0, 0, 1), 0);
root->addChild(camera);
SoCone * cone = new SoCone;
root->addChild(cone);
// Add the renderarea.
SoQtRenderArea* renderarea = new SoQtRenderArea(container);
renderarea->setSceneGraph(root);
camera->viewAll(root, renderarea->getViewportRegion());
}
protected:
void paintEvent(QPaintEvent *event)
{
QPainter p(this);
p.setBrush(Qt::cyan);
p.setPen(Qt::darkCyan);
p.drawRect(250, 250, 100,100);
}
private:
SoQtRenderArea * renderarea;
};
/***********************************************************************/
int
main(int argc, char ** argv)
{
// Initialize Qt and SoQt.
QApplication app(argc, argv);
SoQt::init((QWidget *)NULL);
// Set up scrollview window.
MyGLView * vp = new MyGLView(NULL);
// Map window.
vp->show();
// Set termination condition.
QObject::connect(qApp, SIGNAL(lastWindowClosed()), qApp,
SLOT(quit()));
// Start event loop.
SoQt::mainLoop();
return 0;
}
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