Change the cursor of a widget inside a QGraphicsProxyWidget

[Paolo_BE]

Hi everyone,

I have got a problem to change the cursor shape of my widget on a left click in it.

Context (Qt 4.8, win 7):
I have a QGraphicsScene containing a QGraphicsProxyWidget. This proxy hold my widget.

QGraphicsScene scene;
QGraphicsProxyWidget proxy;
MyWidget widget;
proxy.setWidget(aWidget);
scene.addItem(proxy);

QGraphicsScene scene;
QGraphicsProxyWidget proxy;
MyWidget widget;
proxy.setWidget(aWidget);
scene.addItem(proxy);

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In MyWidget class, I have override the function mousepress & mouserelease as :

void MyWidget::mousePressEvent(QMouseEvent *ev){
	if(ev->button() == Qt::LeftButton){
		setCursor(QCursor(Qt::OpenHandCursor));	
	}
}
 
void MyWidget::mouseReleaseEvent(QMouseEvent *ev){
 
}

void MyWidget::mousePressEvent(QMouseEvent *ev){
	if(ev->button() == Qt::LeftButton){
		setCursor(QCursor(Qt::OpenHandCursor));	
	}
}

void MyWidget::mouseReleaseEvent(QMouseEvent *ev){
   
}

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For information, MyWidget override also the repaintEvent

void MyWidget::paintEvent(QPaintEvent* p){
	QPainter painter(this);
	painter.drawPixmap(0,0,pp);
}

void MyWidget::paintEvent(QPaintEvent* p){
	QPainter painter(this);
	painter.drawPixmap(0,0,pp);
}

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The problem is the mouse cursor only change when I press the left button of the mouse in the widget and I move my mouse out of the widget and go back again in it focus.

I have tested my code by showing MyWidget as a classic window (MyWidget::show()) and the cursor immediately change when I press the left mouse button.


I certainly miss something to add when the widget is in a proxy.

Thanks for your help,

Paolo

[Paolo_BE]

Not the best way for sur, but a solution is to have a mapping beetween the widget and the proxy, we will call the proxy "parent"

the code will be something like :

void MyWidget::mousePressEvent(QMouseEvent *ev){
    if(ev->button() == Qt::LeftButton){
       //parent is the proxy containing MyWidget
       parent->setCursor(QCursor(Qt::OpenHandCursor));
    }
    }
 
    void MyWidget::mouseReleaseEvent(QMouseEvent *ev){
       parent->setCursor(QCursor(Qt::ArrowCursor));
    }

void MyWidget::mousePressEvent(QMouseEvent *ev){
    if(ev->button() == Qt::LeftButton){
       //parent is the proxy containing MyWidget
       parent->setCursor(QCursor(Qt::OpenHandCursor));
    }
    }
     
    void MyWidget::mouseReleaseEvent(QMouseEvent *ev){
       parent->setCursor(QCursor(Qt::ArrowCursor));
    }

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I hope that will help someone.

Paolo