Drawing over QLabel

[nunnu]

Hi,

I have a QLabel on which I have set a pixmap of an image

QImage image(fileName);
if (image.isNull()) {
QMessageBox::information(this, tr("Image Viewer"),
tr("Cannot load %1.").arg(fileName));
return;
}
imageLabel->setPixmap(QPixmap::fromImage(image));

Now, I want to write text over this image which i have loaded into QLabel

Please tell me how to do this.

Cheers

[Lykurg]

You can paint on the pixmap itself (simply set a painter on it and draw) or you reimplemented the paint event of the label and do the painting there. Second would be nicer I think.

And is there any reason why you load the file as a QImage to convert it then to a QPixmap?

[nunnu]

Hi

Thanks for the help. Could you tell me the code snippet to do the same(reimplement the paint event of the label and paint there).

I am new to Qt and I used this snippet from an example "Image Viewer". I load an image file using QImage.

[dflo]

In reverse order:

QPixmap pixmap(filename);
if (pixmap.isNull())
  ...

QPixmap pixmap(filename);
if (pixmap.isNull())
  ...

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class MySuperCoolLabel (QLabel);
 
void MySuperCoolLabel::paintEvent (QPaintEvent *event)
{
  painter = QPainter(this);
  painter.save();
  painter.drawPixmap(0, 0, my_pixmap);
  painter.setFont(font());
  painter.drawText(x, y, my_text);
  painter.restore();
}

class MySuperCoolLabel (QLabel);

void MySuperCoolLabel::paintEvent (QPaintEvent *event)
{
  painter = QPainter(this);
  painter.save();
  painter.drawPixmap(0, 0, my_pixmap);
  painter.setFont(font());
  painter.drawText(x, y, my_text);
  painter.restore();
}

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Please read the class documentation in addition to the tutorials.

[yycking]

How about this
label->setStyleSheet("background-image: url(logobackground.png)");
label.png

[DanH]

Use the image to set the background, then write a normal label.