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POQGraphicsScene, QGraphicsView and QVBoxLayout() problem
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  1. POQGraphicsScene, QGraphicsView and QVBoxLayout() problem
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    copied!<p>Greetings everyone,</p> <p>Every time I run it seems Qt Creator just stop working, when I commented out the line <code>//mainWindow = new MainWindow();</code> But if the line is not commented out<code>, MainWindow</code> will keep appearing many times. Also to check, is the structure of the <code>QGraphicsScene</code>, <code>QGraphicsView</code> and <code>QVBoxLayout</code> correct because I cant seem to make the view to appear when MainWindow is being called in main.cpp. </p> <p>thanks :)</p> <pre><code>MainWindow::MainWindow(QWidget *parent) : QMainWindow(parent), keydown_left(false), keydown_right(false),scene(NULL), view(NULL) { qDebug("MainWindow"); //mainWindow = new MainWindow(); //qsrand(QTime(0,0,0).secsTo(QTime::currentTime())); scene = new QGraphicsScene(mainWindow); view = new QGraphicsView(scene, mainWindow); scene-&gt;setSceneRect(-300, 0, 640, 360); scene-&gt;setItemIndexMethod(QGraphicsScene::NoIndex); Egg *egg = new Egg(); QVBoxLayout *layout = new QVBoxLayout(); for (int i = 0; i &lt; ObjCount; ++i) { FlyingObj *Fo= new FlyingObj(); Fo-&gt;setPos(::sin((i * 6.28) / ObjCount) * 500, ::cos((i * 6.28) / ObjCount) * 500); scene-&gt;addItem(Fo); } egg-&gt;setPos((640-64)/2, 100);//16 - 2*16 scene-&gt;addItem(egg); view-&gt;setRenderHint(QPainter::Antialiasing); view-&gt;setBackgroundBrush(QPixmap(":/bg.jpg")); //view-&gt;setViewportUpdateMode(QGraphicsView::BoundingRectViewportUpdate); view-&gt;setDragMode(QGraphicsView::NoDrag); view-&gt;setWindowTitle(QT_TRANSLATE_NOOP(QGraphicsView, "Egg game")); view-&gt;resize(640, 360); QObject::connect(scene, SIGNAL(keyPressEvent(QKeyEvent)), this, SLOT(keyPressEvent(QKeyEvent))); view-&gt;setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff); view-&gt;setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOff); view-&gt;setFrameStyle(QFrame::NoFrame); view-&gt;setFocusPolicy(Qt::NoFocus); view-&gt;setCacheMode(QGraphicsView::CacheBackground); view-&gt;showFullScreen(); layout-&gt;addWidget(view); QWidget *w = new QWidget(); w-&gt;setLayout(layout); } </code></pre>
 

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