QGraphicsView

[hgedek]

class ImenuPage:public QGraphicsView,public IBasePage
{
}

class ImenuPage:public QGraphicsView,public IBasePage
{
}

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IBasePage is an abstract class and inherits from QWidget.

ImenuPage::ImenuPage(EditorPage *_editor,QWidget *parent)
:QGraphicsView(parent),IBasePage(_editor)
{
	scene=new QGraphicsScene;
	scene->setSceneRect(230, 100, 560, 320);
	setScene(scene);
}
 
class IBasePage:public QWidget
{
}

ImenuPage::ImenuPage(EditorPage *_editor,QWidget *parent)
:QGraphicsView(parent),IBasePage(_editor)
{
	scene=new QGraphicsScene;
	scene->setSceneRect(230, 100, 560, 320);
	setScene(scene);
}

class IBasePage:public QWidget
{
}

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When I didnt use IBasePage I can create a scene and show images.But If I use above codes there is nothing.Why?