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

NAME

QwtPlotPanner - QwtPlotPanner provides panning of a plot canvas.

SYNOPSIS

#include <qwt_plot_panner.h>

Inherits QwtPanner.

Public Slots


virtual void moveCanvas (int dx, int dy)

Public Member Functions


QwtPlotPanner (QWidget *)
A panner for the canvas of a QwtPlot. virtual ~QwtPlotPanner ()
Destructor. QWidget * canvas ()
Return observed plot canvas. const QWidget * canvas () const
Return Observed plot canvas. QwtPlot * plot ()
Return plot widget, containing the observed plot canvas. const QwtPlot * plot () const
Return plot widget, containing the observed plot canvas. void setAxisEnabled (QwtAxisId axisId, bool on)
En/Disable an axis. bool isAxisEnabled (QwtAxisId) const

Protected Member Functions


virtual QBitmap contentsMask () const override
virtual QPixmap grab () const override

Additional Inherited Members

Detailed Description

QwtPlotPanner provides panning of a plot canvas.

QwtPlotPanner is a panner for a plot canvas, 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.

Constructor & Destructor Documentation

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

A panner for the canvas of a QwtPlot. The panner is enabled for all axes

Parameters

canvas Plot canvas to pan, also the parent object

See also

setAxisEnabled()

Definition at line 128 of file qwt_plot_panner.cpp.

Member Function Documentation

QBitmap QwtPlotPanner::contentsMask () const [override], [protected], [virtual]

Calculate a mask from the border path of the canvas

Returns

Mask as bitmap

See also

QwtPlotCanvas::borderPath()

Reimplemented from QwtPanner.

Definition at line 267 of file qwt_plot_panner.cpp.

QPixmap QwtPlotPanner::grab () const [override], [protected], [virtual]

Returns

Pixmap with the content of the canvas

Reimplemented from QwtPanner.

Definition at line 278 of file qwt_plot_panner.cpp.

bool QwtPlotPanner::isAxisEnabled (QwtAxisId axisId) const

Test if an axis is enabled

Parameters

axisId Axis

Returns

True, if the axis is enabled

See also

setAxisEnabled(), moveCanvas()

Definition at line 168 of file qwt_plot_panner.cpp.

void QwtPlotPanner::moveCanvas (int dx, int dy) [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 216 of file qwt_plot_panner.cpp.

void QwtPlotPanner::setAxisEnabled (QwtAxisId axisId, 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

axisId Axis id
on On/Off

See also

isAxisEnabled(), moveCanvas()

Definition at line 154 of file qwt_plot_panner.cpp.

Author

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Sun Jul 18 2021 Version 6.2.0