[Qt-interest] How to scroll text drawn with Qpainter in QGraphicsview

[John McClurkin]

_h_ wrote:
> Hi,
>  
> I have implemented QGraphicsView as follow...
>  
>   3 class GraphicsView: public QGraphicsView
>   4 {
>   5     public:
>   6         GraphicsView(QGraphicsScene *s): QGraphicsView(s) {};
>   7
>   8         GraphicsView(QWidget *parent): QGraphicsView(parent) {
>   9             //setViewport(new QGLWidget);
>  10             //setViewportUpdateMode(FullViewPortUpdate);
>  11             //setOptimizationFlags(DontClipPainter);
>  12             //setCacheMode(CacheNone);
>  13         };
>  14         ~GraphicsView(){};
>  15     protected:
>  16         /*void drawBackground(QPainter *painter, const QRectF &rect) {
>  17             //painter->save();
>  18             //paintGL();
>  19             //painter->restore();
>  20             //painter->fillRect(rect, Qt::blue);
>  21         }*/
>  22         void drawForeground(QPainter *painter, const QRectF &rect) {
>  23             QColor c(0, 255, 127);
>  24             painter->fillRect(rect, c);
>  25             QFont f;
>  26             f.setPointSize(25);
>  27             painter->setFont(f);
>  28             painter->drawText(0,0, "help would required to scoll 
> this text");
>  29         }
>  30 };
> The problem here is that the text drawn with painter (at line 28) is 
> getting cut and QGraphicsView doesn't shows the scrollbars.
>  
> In my application user can set any font size, and based on the font size 
> view should display scrollbars.
>  
> Thank you in advance.
>  
> Thank you.
A QGraphicsView object is usually used to show a QGraphicsScene object. 
If the scene is larger than the view's viewport, the view displays 
scrollbars. You replaced the viewport with a QGLWidget. QGLWidgets don't 
resize when drawing goes past the borders so the view doesn't display 
scrollbars. You can try manually resizing the viewport to accomodate the 
text.