QwtPolarMagnifier(3)           Qwt User's Guide           QwtPolarMagnifier(3)

NAME
       QwtPolarMagnifier - QwtPolarMagnifier provides zooming, by magnifying
       in steps.


SYNOPSIS
       #include <qwt_polar_magnifier.h>

       Inherits QwtMagnifier.

   Public Slots
       virtual void rescale (double factor) override
       void unzoom ()
           Unzoom the plot widget.

   Public Member Functions
       QwtPolarMagnifier (QwtPolarCanvas *)
       virtual ~QwtPolarMagnifier ()
           Destructor.
       void setUnzoomKey (int key, int modifiers)
       void getUnzoomKey (int &key, int &modifiers) const
       QwtPolarPlot * plot ()
       const QwtPolarPlot * plot () const
       QwtPolarCanvas * canvas ()
       const QwtPolarCanvas * canvas () const

   Protected Member Functions
       virtual void widgetKeyPressEvent (QKeyEvent *) override

Detailed Description
       QwtPolarMagnifier provides zooming, by magnifying in steps.

       Using QwtPlotMagnifier a plot can be zoomed in/out in steps using keys,
       the mouse wheel or moving a mouse button in vertical direction.

       Together with QwtPolarPanner it is possible to implement an individual
       navigation of the plot canvas.

       See also
           QwtPolarPanner, QwtPolarPlot, QwtPolarCanvas

       Definition at line 30 of file qwt_polar_magnifier.h.

Constructor & Destructor Documentation
   QwtPolarMagnifier::QwtPolarMagnifier (QwtPolarCanvas * canvas) [explicit]
       Constructor

       Parameters
           canvas Plot canvas to be magnified

       Definition at line 34 of file qwt_polar_magnifier.cpp.

Member Function Documentation
   QwtPolarCanvas * QwtPolarMagnifier::canvas ()
       Returns
           Observed plot canvas

       Definition at line 74 of file qwt_polar_magnifier.cpp.

   const QwtPolarCanvas * QwtPolarMagnifier::canvas () const
       Returns
           Observed plot canvas

       Definition at line 80 of file qwt_polar_magnifier.cpp.

   void QwtPolarMagnifier::getUnzoomKey (int & key, int & modifiers) const
       Returns
           Key, and modifiers that are used for unzooming

       Parameters
           key Key code
           modifiers Modifiers

       See also
           setUnzoomKey(), QwtPolarPlot::unzoom()

       Definition at line 67 of file qwt_polar_magnifier.cpp.

   QwtPolarPlot * QwtPolarMagnifier::plot ()
       Returns
           Observed plot

       Definition at line 86 of file qwt_polar_magnifier.cpp.

   const QwtPolarPlot * QwtPolarMagnifier::plot () const
       Returns
           observed plot

       Definition at line 96 of file qwt_polar_magnifier.cpp.

   void QwtPolarMagnifier::rescale (double factor) [override],  [virtual],
       [slot]
       Zoom in/out the zoomed area

       Parameters
           factor A value < 1.0 zooms in, a value > 1.0 zooms out.

       Definition at line 129 of file qwt_polar_magnifier.cpp.

   void QwtPolarMagnifier::setUnzoomKey (int key, int modifiers)
       Assign key and modifiers, that are used for unzooming The default
       combination is Qt::Key_Home + Qt::NoModifier.

       Parameters
           key Key code
           modifiers Modifiers

       See also
           getUnzoomKey(), QwtPolarPlot::unzoom()

       Definition at line 54 of file qwt_polar_magnifier.cpp.

   void QwtPolarMagnifier::widgetKeyPressEvent (QKeyEvent * event) [override],
       [protected],  [virtual]
       Handle a key press event for the observed widget.

       Parameters
           event Key event

       Reimplemented from QwtMagnifier.

       Definition at line 110 of file qwt_polar_magnifier.cpp.


Author
       Generated automatically by Doxygen for Qwt User's Guide from the source
       code.

Version 6.2.0                   Sun Jul 18 2021           QwtPolarMagnifier(3)