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setCanvas blocks QtCanvasView mouse tracking

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YuriyRusinov

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  • "YuriyRusinov" is male
  • "YuriyRusinov" started this thread

Posts: 8

Location: Russian Federation

Occupation: Space Academy named Mozhaiskiy

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1

Wednesday, April 19th 2006, 1:54pm

setCanvas blocks QtCanvasView mouse tracking

Hello, All !

I develop class

Source code

 
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class XGisCanvasView : public QtCanvasView
{
    private:
        Q_OBJECT
    public:
        XGisCanvasView (QWidget *parent=NULL);
        virtual ~XGisCanvasView (void);

        QPoint getPos (void) const { return scr; }

    signals:
        void contentsMouseMove (QMouseEvent *e);
        void mousePress (QMouseEvent *e);
        void mouseRelease (QMouseEvent *e);
        void mouseDoubleClick (QMouseEvent *e);
        void mouseContextMenu (QContextMenuEvent *e);
        void resize (QResizeEvent *e);

    protected:
        virtual void contentsMouseMoveEvent (QMouseEvent *e);
        virtual void contentsMousePressEvent (QMouseEvent *e);
        virtual void contentsMouseReleaseEvent (QMouseEvent *e);
        virtual void contentsMouseDoubleClickEvent (QMouseEvent *e);
        virtual void contentsContextMenuEvent (QContextMenuEvent *e);
        virtual void resizeEvent (QResizeEvent *e);

    private:
        QPoint scr;
        QtCanvas* pCanvas;
};


In constructor of this class I make setcanvas for this QtCanvasView subclass

Source code

 
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XGisCanvasView :: XGisCanvasView(QWidget *parent/*=NULL*/) : QtCanvasView (parent), scr (QPoint(0, 0))
{
    setMouseTracking ( true );
    viewport()->setMouseTracking ( true );

    int x = width();
    int y = height();
    if ( parent )
    {
        x = parent->width();
        y = parent->height();
    }
    qDebug ("width = %d height = %d", x, y);
    pCanvas = new QtCanvas ( this );
    qDebug ("QtCanvas init");
    pCanvas->resize (x, y);

    //QtCanvasView (&wcanv, parent);
    setCanvas( pCanvas );
    qDebug ("QtCanvas set");
    this->canvas()->update();
    bool isTrace = hasMouseTracking();
    bool isVTrace = viewport()->hasMouseTracking();
    if ( isTrace )
        qDebug ("Mouse tracking is on");
    else
        qDebug ("Mouse tracking is off");
    if ( isVTrace )
        qDebug ("Viewport Mouse tracking is on");
    else
        qDebug ("Viewport Mouse tracking is off");
}


After setCanvas variables isTrace and isVTrace are true, but mouse movement does not trace, I have to press mouse button. If I comment setCanvas function, all mouse movements are traced normally. Where is problem ?
Best regards,
Yuriy Rusinov.

YuriyRusinov

Beginner

  • "YuriyRusinov" is male
  • "YuriyRusinov" started this thread

Posts: 8

Location: Russian Federation

Occupation: Space Academy named Mozhaiskiy

  • Send private message

2

Thursday, April 20th 2006, 8:37am

setCanvas blocks QtCanvasView mouse tracking [SOLVED]

Problem was solved by adding this->widget()->setMouseTracking ( true ); and remove all others mouse settings.
Best regards,
Yuriy Rusinov.