Fail to add view into addWidget

[houmingc]

Want to merge collidingmice and 2dpainting using GridLayout. Falled. Please advice

 #include "glwidget.h"
#include "widget.h"
#include "window.h"
#include <QtWidgets>
#include <math.h>
#include "mouse.h"
#include <QGridLayout>
#include <QLabel>
#include <QTimer>

static const int MouseCount = 7;
 
Window::Window()
{
    setWindowTitle(tr("2D Painting on Native and OpenGL Widgets"));

//    Widget *native = new Widget(&helper, this);
    GLWidget *openGL = new GLWidget(&helper, this);
//    QLabel *nativeLabel = new QLabel(tr("Native"));
//    nativeLabel->setAlignment(Qt::AlignHCenter);
//    QLabel *openGLLabel = new QLabel(tr("OpenGL"));
//    openGLLabel->setAlignment(Qt::AlignHCenter);



    qsrand(QTime(0, 0, 0).secsTo(QTime::currentTime()));
 
    QGraphicsScene scene;
    scene.setSceneRect(-300, -300, 600, 600);
 
    scene.setItemIndexMethod(QGraphicsScene::NoIndex);
 
    for (int i = 0; i < MouseCount; ++i) {
        Mouse *mouse = new Mouse;
        mouse->setPos(::sin((i * 6.28) / MouseCount) * 200,
                      ::cos((i * 6.28) / MouseCount) * 200);
        scene.addItem(mouse);
    }
 
    QGraphicsView view(&scene);
    view.setRenderHint(QPainter::Antialiasing);
    //view.setBackgroundBrush(QPixmap(":/images/cheese.jpg"));
 
    view.setCacheMode(QGraphicsView::CacheBackground);
    view.setViewportUpdateMode(QGraphicsView::BoundingRectViewportUpdate);
    view.setDragMode(QGraphicsView::ScrollHandDrag);
 
    view.setWindowTitle(QT_TRANSLATE_NOOP(QGraphicsView, "Colliding Mice"));
    view.resize(400, 300);
    view.show();

    QTimer timer;
    QObject::connect(&timer, SIGNAL(timeout()), &scene, SLOT(advance()));
    timer.start(1000 / 33);


    QGridLayout *layout = new QGridLayout;
    layout->addWidget(view, 0, 0);
    layout->addWidget(openGL, 0, 1);
//    layout->addWidget(nativeLabel, 1, 0);
//    layout->addWidget(openGLLabel, 1, 1);
    setLayout(layout);

    QTimer *timer1 = new QTimer(this);
    //connect(timer, SIGNAL(timeout()), native, SLOT(animate()));
    connect(timer1, SIGNAL(timeout()), openGL, SLOT(animate()));
    timer1->start(50);
}

[Edit: fixed code formatting, Chris Kawa]: please surround code with ```.

[SGaist]

Hi,

Most of your widgets are stored on the stack so they'll get destroyed at the end of the constructor hence you won't see them.