QwtPlotPanner Class Reference

Inheritance diagram for QwtPlotPanner:

[legend]Collaboration diagram for QwtPlotPanner:

[legend]List of all members.

---

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)

---

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.

---

Member Function Documentation

QwtPlotCanvas * QwtPlotPanner::canvas

(

)

Return observed plot canvas.

Definition at line 87 of file qwt_plot_panner.cpp.

Referenced by plot().

const QwtPlotCanvas * QwtPlotPanner::canvas

(

)

const

Return Observed plot canvas.

Definition at line 97 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().

const QwtPlot * QwtPlotPanner::plot

(

)

const

Return plot widget, containing the observed plot canvas.

Definition at line 117 of file qwt_plot_panner.cpp.

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.

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::replot(), QwtPlot::setAutoReplot(), QwtPlot::setAxisScale(), and QwtScaleMap::transform().

Referenced by QwtPlotPanner().

---