11 #include "qwt_scale_map.h" 
   12 #include "qwt_plot_magnifier.h" 
   14 class QwtPlotMagnifier::PrivateData
 
   19         for ( 
int axis = 0; axis < QwtAxis::AxisPositions; axis++ )
 
   33     m_data = 
new PrivateData();
 
   56         m_data->isAxisEnabled[axisId] = on;
 
   70         return m_data->isAxisEnabled[axisId];
 
   92         w = w->parentWidget();
 
   94     return qobject_cast< QwtPlot* >( w );
 
  100     const QWidget* w = 
canvas();
 
  102         w = w->parentWidget();
 
  104     return qobject_cast< const QwtPlot* >( w );
 
  117     factor = qAbs( factor );
 
  118     if ( factor == 1.0 || factor == 0.0 )
 
  121     bool doReplot = 
false;
 
  126     for ( 
int axisPos = 0; axisPos < QwtAxis::AxisPositions; axisPos++ )
 
  129             const QwtAxisId axisId( axisPos );
 
  135                 double v1 = scaleMap.
s1();
 
  136                 double v2 = scaleMap.
s2();
 
  146                 const double center = 0.5 * ( v1 + v2 );
 
  147                 const double width_2 = 0.5 * ( v2 - v1 ) * factor;
 
  149                 v1 = center - width_2;
 
  150                 v2 = center + width_2;
 
  171 #include "moc_qwt_plot_magnifier.cpp" 
QwtMagnifier provides zooming, by magnifying in steps.
void setAxisScale(QwtAxisId, double min, double max, double stepSize=0)
Disable autoscaling and specify a fixed scale for a selected axis.
virtual void replot()
Redraw the plot.
void setAutoReplot(bool=true)
Set or reset the autoReplot option.
virtual QwtScaleMap canvasMap(QwtAxisId) const
virtual ~QwtPlotMagnifier()
Destructor.
void setAxisEnabled(QwtAxisId, bool on)
En/Disable an axis.
virtual void rescale(double factor) override
QwtPlotMagnifier(QWidget *)
QWidget * canvas()
Return observed plot canvas.
bool isAxisEnabled(QwtAxisId) const
QwtPlot * plot()
Return plot widget, containing the observed plot canvas.
double transform(double s) const
const QwtTransform * transformation() const
Get the transformation.
double invTransform(double p) const
bool isValid(int axisPos)