[Qt-interest] widget promotion

[Andreas Pakulat]

On 27.12.08 14:05:44, ami guru wrote:
> I have customized class with QGaphicsView as a base class .
> 
> In the designer i have a main window and dragged a QGraphicsView
> widget and placed that in the form to use that as the placeholder.
> 
> Then i promoted that to my customized one.
> 
> The customized class that i have has a constructor.
> 
> What should be the defualt parameter in the constructor
> 
> ********************************************************'
> class H3DNodeView : public QGraphicsView
> {
>     H3DNodeView(QWidget *parent = 0);
> };
> 
> ****************************************************************'
> 
> In that case i have error
> 
> H3DNodeView.cpp: In constructor 'H3DNodeView::H3DNodeView(QWidget*)':
> H3DNodeView.cpp:5: error: type 'QWidget' is not a direct base of
> 'H3DNodeView'

Your constructor implementation is wrong, apparently you're using

H3DNodeView::H3DNodeView( QWidget* parent )
  : QWidget(parent)

But it should be QGraphicsView in the second line.

Andreas
 
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