QwtPlotMagnifier widgetKeyPressEvent

[robertson1]

Do I need to do something to enable QwtPlotMagnifier::widgetKeyPressEvent to work?

Im trying to zoom in with the mouse wheel in only x or y if the x or y key is pressed. Nothing happens with the code below, otherwise the QwtPlotMagnifier seems to working well.

class Zoom: public QwtPlotMagnifier
{
public:
	Zoom(QwtPlotCanvas *canvas): QwtPlotMagnifier(canvas)
	{
	}
 
	virtual void Zoom::widgetKeyPressEvent (QKeyEvent *ke)
	{
		if (ke->key() == Qt::Key_X)
		{
			QwtPlotMagnifier::setAxisEnabled(QwtPlot::yLeft, false);
		}
		else if (ke->key() == Qt::Key_Y)
		{
			QwtPlotMagnifier::setAxisEnabled(QwtPlot::xBottom, false);
		}
	}
	virtual void Zoom::widgetKeyReleaseEvent(QKeyEvent *ke)
	{
		if (ke->key() == Qt::Key_X)
		{
			QwtPlotMagnifier::setAxisEnabled(QwtPlot::yLeft, true);
		}
		else if (ke->key() == Qt::Key_Y)
		{
			QwtPlotMagnifier::setAxisEnabled(QwtPlot::xBottom, true);
		}
	}
}

class Zoom: public QwtPlotMagnifier
{
public:
	Zoom(QwtPlotCanvas *canvas): QwtPlotMagnifier(canvas)
	{
	}

	virtual void Zoom::widgetKeyPressEvent (QKeyEvent *ke)
	{
		if (ke->key() == Qt::Key_X)
		{
			QwtPlotMagnifier::setAxisEnabled(QwtPlot::yLeft, false);
		}
		else if (ke->key() == Qt::Key_Y)
		{
			QwtPlotMagnifier::setAxisEnabled(QwtPlot::xBottom, false);
		}
	}
	virtual void Zoom::widgetKeyReleaseEvent(QKeyEvent *ke)
	{
		if (ke->key() == Qt::Key_X)
		{
			QwtPlotMagnifier::setAxisEnabled(QwtPlot::yLeft, true);
		}
		else if (ke->key() == Qt::Key_Y)
		{
			QwtPlotMagnifier::setAxisEnabled(QwtPlot::xBottom, true);
		}
	}
}

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