windowHandle() will return NULL;

chaochao

In manual ,QWidget::windowHandle() returns a valid instance of a QWindow only after the widget has been shown. It is therefore recommended to delay the initialization of the QWinTaskbarButton instances until QWidget::showEvent().
But how to know the time widget has been shown? I didn't override showEvent.

_taskbarbutton = new QWinTaskbarButton( this);
_taskbarbutton->setWindow(windowHandle());

this code will be wrong,because windowHandle() return NULL;

 QtWin::enableBlurBehindWindow(this);
 _taskbarbutton = new QWinTaskbarButton( this);
 _taskbarbutton->setWindow(windowHandle());

This code will be ok!

So,How to know what time windowHandle()is valid?
thank for your help.

[Edit: Added code tags ~kshegunov]

SGaist

Hi,

Then, why not just re-implement the showEvent method ?