[Qt-interest] 答复: how to know derive class

[Konrad Rosenbaum]

On Thursday 11 November 2010 09:00:52 pengliang(彭亮) wrote:
> Thank you.
> But how to know which QWidget is QLineEdit and which is QComboBox?
> Is this only method?

Well, let's spell it out for you:

if(qobject_cast<QLineEdit*>(myobject)!=0)
  qDebug("It's a Line Edit!");
else
if(qobject_cast<QComboBox*>(myobject)!=0)
  qDebug("It's a Combo!");
else
 qDebug("Ooops, it's something else!");

Now please read the docu of qobject_cast... ;-)


	Konrad
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