Display QImage within main window

c++ qt user-interface qpixmap qlabel
StanOverflow picture StanOverflow · Jul 31, 2012 · Viewed 10.8k times · Source

I'm trying to display an image with Qt, I can get it to appear in a separate window, but I can't make it appear within the main window

Qt_first w;
w.show();

This shows the window I designed in Qt designer, how do I access the Qlabel(Image_Lbel) I put within the QWidget (centralWidget) of that window?

I generated a stripy image that shows correctly, just not within the correct window

QSize size = QSize(640,480);
QImage::Format format = QImage::Format_ARGB32;
QImage image = QImage::QImage(size, format);
//generate
QLabel myLabel;
myLabel.setPixmap(QPixmap::fromImage(image));
myLabel.show();

I get the feeling it could be I haven't included the files from the creator or the namespaces any suggestion much appreciated

Answer

ScarCode picture ScarCode · Jul 31, 2012

I guess your Label is getting displayed independently. Set the parent of label to your main window. Then your Label will displayed inside your main window.

So use,

QLabel *myLabel = new QLabel(this); // sets parent of label to main window 
myLabel->setPixmap(QPixmap::fromImage(image));
myLabel->show();

You can also use move function for moving your label within the main window.

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