QwtPlotPanner Class Reference

Inheritance diagram for QwtPlotPanner:

[legend]Collaboration diagram for QwtPlotPanner:

[legend]List of all members.

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Detailed Description

QwtPlotPanner provides panning of a plot canvas.

QwtPlotPanner is a panner for a QwtPlotCanvas, that adjusts the scales of the axes after dropping the canvas on its new position.

Together with QwtPlotZoomer and QwtPlotMagnifier powerful ways of navigating on a QwtPlot widget can be implemented easily.

Note:

The axes are not updated, while dragging the canvas

See also:

QwtPlotZoomer, QwtPlotMagnifier

Definition at line 32 of file qwt_plot_panner.h.

Public Member Functions
	QwtPlotPanner (QwtPlotCanvas *)
virtual	~QwtPlotPanner ()
QwtPlotCanvas *	canvas ()
const QwtPlotCanvas *	canvas () const
QwtPlot *	plot ()
const QwtPlot *	plot () const
void	setAxisEnabled (int axis, bool on)
bool	isAxisEnabled (int axis) const
Protected Slots
virtual void	moveCanvas (int dx, int dy)

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Constructor & Destructor Documentation

QwtPlotPanner::QwtPlotPanner (  QwtPlotCanvas *  canvas  )  [explicit]

Create a plot panner. The panner is enabled for all axes Parameters: canvas  Plot canvas to pan, also the parent object See also: setAxisEnabled Definition at line 38 of file qwt_plot_panner.cpp. References moveCanvas(), and QwtPanner::panned().

QwtPlotPanner::~QwtPlotPanner (   )  [virtual]

Destructor. Definition at line 48 of file qwt_plot_panner.cpp.

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Member Function Documentation

const QwtPlotCanvas * QwtPlotPanner::canvas (   )  const

Return Observed plot canvas. Definition at line 97 of file qwt_plot_panner.cpp.

QwtPlotCanvas * QwtPlotPanner::canvas (   )

Return observed plot canvas. Definition at line 87 of file qwt_plot_panner.cpp. Referenced by plot().

bool QwtPlotPanner::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, moveCanvas Definition at line 78 of file qwt_plot_panner.cpp.

void QwtPlotPanner::moveCanvas (  int  dx, int  dy )  [protected, virtual, slot]

Adjust the enabled axes according to dx/dy Parameters: dx  Pixel offset in x direction dy  Pixel offset in y direction See also: QwtPanner::panned Definition at line 130 of file qwt_plot_panner.cpp. References QwtPlot::autoReplot(), QwtPlot::axisScaleDiv(), QwtPlot::canvasMap(), QwtScaleDiv::hBound(), QwtScaleDiv::lBound(), plot(), QwtPlot::setAutoReplot(), QwtPlot::setAxisScale(), and QwtScaleMap::transform(). Referenced by QwtPlotPanner().

const QwtPlot * QwtPlotPanner::plot (   )  const

Return plot widget, containing the observed plot canvas. Definition at line 117 of file qwt_plot_panner.cpp.

QwtPlot * QwtPlotPanner::plot (   )

Return plot widget, containing the observed plot canvas. Definition at line 103 of file qwt_plot_panner.cpp. References canvas(). Referenced by moveCanvas().

void QwtPlotPanner::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, moveCanvas Definition at line 64 of file qwt_plot_panner.cpp.

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