[Qt 3.3.4] How do I repaint anything using QCanvas or QPainter?

[EnQ]

Thanks for the hint, unfortunately it still doesn't work.

WStaticContents seems to be exactly what I want to avoid while WNoAutoErase sounds like a solution. But it still looks the same:

The original painter output:



Window shrinked:



Window enlarged again:



Window repainted due to putting another window in front of it:




Do you have any other ideas?

[EnQ]

Okay, just wanted to let you know I am using a very dirty workaround for now as time is slowly running out.

As I thought it is possible to call hide() and show() on the widget to get it repainted (repaint() didn't work for me neither...). Since I can't call it from drawContents I decided to write a small event handler for the resized() signal emitted by QCanvas. Unfortunately this is only half the way: It works great but only when enlarging the widget.

I couldn't find any better way to repaint it on being shrinked but by creating a QTimer that calls an event handler to check for decrease in the main widgets size and then calls hide() and show() on all widgets that need it.

As I said that's veeeery dirty but at least it works.

[jacek]

What do you need QCanvas for? Where are the QCanvasItems?

[EnQ]

As I said I cannot use QCanvasItems since I draw dynamically changing content and don't know how to clear a QCanvas from all its items.

[jacek]

As I said I cannot use QCanvasItems since I draw dynamically changing content and don't know how to clear a QCanvas from all its items.

So why do you use QCanvas and QCanvasView? Wouldn't it be easier to use plain QWidget?