Good day! With Qt 4.7.3 an example below crashes at QGraphicsScene::~QGraphicsScene() call: #include <QCoreApplication> #include <QGraphicsScene> int main( int argc, char* argv[] ) {...

I have the following code to set up a QGraphicsScene. I wish to click on the scene and draw a point at the location I've clicked. How could I do this? This is my current code: MainWindow::MainWind...

With the below code snippet I create a scene with 100.000 rectangles. The performance is fine; the view responds with no delays. QGraphicsScene * scene = new QGraphicsScene; for (int y = -50000; y...

I am using Qt and C++ as my environment. I draw a QGraphicsView in my UI, then create a scene and add lines to that it. I run through an array of 5000 points and draw lines connecting each point. Q...

I have been toying with this piece of code: QGraphicsLineItem * anotherLine = this->addLine(50,50, 100, 100); qDebug() << anotherLine->scenePos(); QGraphicsLineItem * anotherLine2 = t...