[Solved]QGraphicsView - no QPixmap shown load from resources (Linux)

ruehlchr

Hi All,

may I stay on the tube - but I cannot display a QPixmap within a Dialog Window ..
and stuck's for a couple of days. I use the QtDesigner to create the Dialog.
No Errors show in the qDebug output.
Just have a review below. May someone can open my eyes.

@
AboutDialog::AboutDialog(QWidget *parent)
: QDialog(parent)
{
QGraphicsScene scene;
QString resourcePath = ":/images/about.png";

setupUi(this);

if( ! QFile::exists(resourcePath) )
{
qDebug("*** Error - Resource path not found : "%s"", resourcePath.toLatin1().data());
}
else {

QPixmap p1(resourcePath);

if ( p1.isNull() ) {
  qDebug("*** Error - Null QPixmap");
}
else {
  QGraphicsPixmapItem *item_p1 = scene.addPixmap(p1);
  item_p1->setVisible(true);
  //QGraphicsTextItem *item_txt = scene.addText("APTool v1.0");
  //item_txt->setVisible(true);
  gvViewPort->setScene(&scene);
  gvViewPort->show();
}

}
}
@

@

QGraphicsView *gvViewPort;

void setupUi(QDialog *About)
{
    if (About->objectName().isEmpty())
        About->setObjectName(QString::fromUtf8("About"));
    About->resize(400, 300);
    QIcon icon;
    icon.addFile&#40;QString::fromUtf8(":/images/gts.png"&#41;, QSize(&#41;, QIcon::Normal, QIcon::Off);
    About->setWindowIcon(icon);
    About->setModal(true);
    gvViewPort = new QGraphicsView(About);
    gvViewPort->setObjectName(QString::fromUtf8("gvViewPort"));
    gvViewPort->setGeometry(QRect(40, 10, 312, 239));

...
@

and all I see is a white frame.

!http://www.gtsys.com.hk:8080/~chris/Screenshot-About.png(About-dialog-no-pixmap)!

thanks.
Chris

ruehlchr

Solved:

The QGraphicsScene scene should be a private member of the class.

private:
QGraphicsScene *scene;

and in the constructor
scene = new QGraphicsScene();

Cheers

luca

[quote author="ruehlchr" date="1306816114"]Solved:

The QGraphicsScene scene should be a private member of the class.

private:
QGraphicsScene *scene;

and in the constructor
scene = new QGraphicsScene();

Cheers
[/quote]

You probably can do in the constructor:
@
QGraphicsScene *scene = new QGraphicsScene();

@