Minimal requirement to update a QLabel's text and show it
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My point was that QProgressBar doesn't do anything special with regard to other widgets surrounding it (as you saw from its implementation). It's a border effect, nice in your case, but I wouldn't rely on it.
@SGaist said in Minimal requirement to update a QLabel's text and show it:
It's a border effect
What does that mean? Are you saying something like: the
QProgressBar::repaint()call (inQProgressBar.setValue()) just happens to cause theQLabelto repaint because the widgets are close to each other, there is some overlap? -
From a quick look, it goes down to the rendering engine, I haven't read the whole implementation to determine exactly how the repainting of one of the widget triggers an update of the whole "container" widget.
