[Qt-interest] Calculating text size in QLineEdit

[Andre Somers]

Op Di, 8 maart, 2011 10:06 am, schreef Matthias Paul:
> Hello!
>
> I created a QLineEdit subclass, which automatically displays a truncated
> text if the original text is too long for the widget's size, so that
> there's no need to scroll for the user. Instead a tooltip with full text
> is displayed.
>
> QFontMetrics calculates the size required for the displayed text based on
> QWidget's size() (provided by ResizeEvent). Still, I cannot figure out how
> to get the the text label size _minus_ widget's borders and margins. Guess
> I have to use QStyle somehow, so can someone give me a hint please?

Perhaps you can use QStyle::subElementRect, using
QStyle::SE_LineEditContents for the element argument, and a style option
initialized with your line edit widget as the style option? That should
give you the rect that is available to draw the text.

André