qwtplotmagnifier(3)
NAME
QwtPlotMagnifier
SYNOPSIS
Inherits QwtMagnifier.
Detailed Description
QwtPlotMagnifier 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 QwtPlotZoomer and QwtPlotPanner it is possible to
implement individual and powerful navigation of the plot canvas.
- See also:
- QwtPlotZoomer, QwtPlotPanner, QwtPlot
- Definition at line 30 of file qwt_plot_magnifier.h.
- Public Member Functions
- QwtPlotMagnifier (QwtPlotCanvas *)
virtual ~QwtPlotMagnifier ()
void setAxisEnabled (int axis, bool on)
bool isAxisEnabled (int axis) const
QwtPlotCanvas * canvas ()
const QwtPlotCanvas * canvas () const QwtPlot * plot ()
const QwtPlot * plot () const - Protected Member Functions
- virtual void rescale (double factor)
Constructor & Destructor Documentation
- QwtPlotMagnifier::QwtPlotMagnifier (QwtPlotCanvas * canvas) [explicit]
- Constructor
- Parameters:
canvas Plot canvas to be magnified
- Definition at line 35 of file qwt_plot_magnifier.cpp.
- QwtPlotMagnifier::~QwtPlotMagnifier () [virtual]
- Destructor.
- Definition at line 42 of file qwt_plot_magnifier.cpp.
Member Function Documentation
- void QwtPlotMagnifier::setAxisEnabled (int axis, bool on)
- En/Disable an axis.
- Axes that are enabled will be synchronized to the result of panning.
All other axes will remain unchanged. - Parameters:
axis Axis, see QwtPlot::Axis
on On/Off - See also:
isAxisEnabled
- Definition at line 58 of file qwt_plot_magnifier.cpp.
- bool QwtPlotMagnifier::isAxisEnabled (int axis) const
- Test if an axis is enabled
- Parameters:
axis Axis, see QwtPlot::Axis
- Returns:
True, if the axis is enabled
- See also:
setAxisEnabled
- Definition at line 72 of file qwt_plot_magnifier.cpp.
- Referenced by rescale().
- QwtPlotCanvas * QwtPlotMagnifier::canvas ()
- Return observed plot canvas.
- Definition at line 81 of file qwt_plot_magnifier.cpp.
- Referenced by plot().
- const QwtPlotCanvas * QwtPlotMagnifier::canvas () const
- Return Observed plot canvas.
- Definition at line 91 of file qwt_plot_magnifier.cpp.
- QwtPlot * QwtPlotMagnifier::plot ()
- Return plot widget, containing the observed plot canvas.
- Definition at line 97 of file qwt_plot_magnifier.cpp.
- References canvas().
- Referenced by rescale().
- const QwtPlot * QwtPlotMagnifier::plot () const
- Return plot widget, containing the observed plot canvas.
- Definition at line 111 of file qwt_plot_magnifier.cpp.
- void QwtPlotMagnifier::rescale (double factor) [protected, virtual]
- Zoom in/out the axes scales
- Parameters:
factor A value < 1.0 zooms in, a value > 1.0 zooms out.
- Implements QwtMagnifier.
- Definition at line 120 of file qwt_plot_magnifier.cpp.
- References QwtPlot::autoReplot(), QwtPlot::axisScaleDiv(),
isAxisEnabled(), QwtScaleDiv::lBound(), plot(), QwtPlot::replot(),
QwtPlot::setAutoReplot(), and QwtPlot::setAxisScale().
Author
- Generated automatically by Doxygen for Qwt User's Guide from the source
code.