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c++qtqpainter

How to get the sizes of the rendered text on a QPainter?

I draw in my Qt program on a QPainter the text and various elements round it. I need to get the sizes in pixels which will be occupied by this text.

Can I get somehow the sizes in pixels, knowing a text string and a font?

Thanks.

Solution

  • You can use QFontMetrics for the purpose. Following is sample from Qt Docs. 

     QFont font("times", 24);
 QFontMetrics fm(font);
 int pixelsWide = fm.width("What's the width of this text?");
 int pixelsHigh = fm.height();