how to zoom in and zoom out a QGraphicsWidget by Button?
<p>I have an example of <code>QGraphicsWidget</code>. i want to added a tow button , a button for Zoom In , and a button for the Zoom out . the code : </p>

<pre><code>#include "myGraphicsWidget.h"
int main(int argc,char* argv[])
{
    QApplication app(argc,argv);
    QGraphicsScene scene;

    myGraphicsWidget* graphicsWidget = new myGraphicsWidget("This is My Custom\n QGraphicsWidget!!");

    QGraphicsView view(&amp;scene);        
    scene.addItem(graphicsWidget);

    view.showFullScreen();

    return app.exec

();

}
</code></pre>

<p>please write to me a function (slot) for Zoom . </p>