Hi all,

i need some help regarding the following issue. I have a QwtPlot with some functionalities on right mouse click.

Qt Code: 
  1. void Sys_Plot_Wid::contextMenuEvent(QContextMenuEvent *event)
  2. {	
  3.    QMenu contextMenu(this);
  4.    contextMenu.addAction(printAct);
  5.    contextMenu.addAction(printPDFAct);
  6.    contextMenu.addAction(saveasAct);
  7.    contextMenu.addAction(zoomAct);
  8.    contextMenu.addAction(showGridAct);
  9.    contextMenu.exec(event->globalPos());
  10. }
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I want to be able to enable or disable my zoomer with a checkable action. I can enable the zoom by clicking my action but as i uncheck the action, the zoomer is still enabled. Can someone tell me what am i doing wrong?

Action is declared in my ctor like:
Qt Code: 
  1. this->zoomAct->setCheckable(true);
  2. this->zoomAct->setChecked(false);
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I connect the action with:
Qt Code: 
  1. QObject::connect(this->zoomAct, SIGNAL(toggled(bool)), this, SLOT(enableZoomMode(bool)));
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And the enableZoomMode function looks like:
Qt Code: 
  1. void Sys_Plot_Wid::enableZoomMode(bool on)
  2. {
  3. 	QwtPlotMagnifier *plotMagnifier = new QwtPlotMagnifier(this->canvas());
  4. 	QwtPlotPanner *plotPanner = new QwtPlotPanner(this->canvas());
  5. 	QwtPlotZoomer *plotZoomer = new QwtPlotZoomer(this->canvas(), true);
  6. 	QwtPlotPicker *picker = new QwtPlotPicker(QwtPlot::xBottom, QwtPlot::yLeft, QwtPicker::PointSelection | QwtPicker::DragSelection, 
  7. 							QwtPlotPicker::CrossRubberBand, QwtPicker::AlwaysOn, this->canvas());
  8.  
  9. 	plotMagnifier->setMouseButton(Qt::MidButton);
  10. 	plotMagnifier->setEnabled(on);
  11. 	plotPanner->setMouseButton(Qt::LeftButton);
  12. 	plotPanner->setEnabled(on);
  13. 	plotZoomer->setMousePattern(0, Qt::LeftButton, Qt::ControlModifier); 
  14. 	plotZoomer->setMousePattern(1, Qt::MidButton); 
  15. 	plotZoomer->setMousePattern(2, Qt::NoButton);
  16. 	plotZoomer->setEnabled(on);
  17. 	picker->setRubberBandPen(QColor(Qt::darkCyan));
  18. 	picker->setRubberBand(QwtPicker::CrossRubberBand);
  19. 	picker->setEnabled(!on);
  20.  
  21. 	this->replot();
  22. }
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Thanks for your replies.