QwtPlotPicker Class Reference

Inheritance diagram for QwtPlotPicker:

[legend]Collaboration diagram for QwtPlotPicker:

[legend]List of all members.

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Detailed Description

QwtPlotPicker provides selections on a plot canvas.

QwtPlotPicker is a QwtPicker tailored for selections on a plot canvas. It is set to a x-Axis and y-Axis and translates all pixel coordinates into this coodinate system.

Definition at line 29 of file qwt_plot_picker.h.

Signals
void	selected (const QwtDoublePoint &pos)
void	selected (const QwtDoubleRect &rect)
void	selected (const QwtArray< QwtDoublePoint > &pa)
void	appended (const QwtDoublePoint &pos)
void	moved (const QwtDoublePoint &pos)
Public Member Functions
	QwtPlotPicker (QwtPlotCanvas *)
	QwtPlotPicker (int xAxis, int yAxis, QwtPlotCanvas *)
	QwtPlotPicker (int xAxis, int yAxis, int selectionFlags, RubberBand rubberBand, DisplayMode trackerMode, QwtPlotCanvas *)
virtual void	setAxis (int xAxis, int yAxis)
int	xAxis () const
int	yAxis () const
QwtPlot *	plot ()
const QwtPlot *	plot () const
QwtPlotCanvas *	canvas ()
const QwtPlotCanvas *	canvas () const
Protected Member Functions
QwtDoubleRect	scaleRect () const
QwtDoubleRect	invTransform (const QRect &) const
QRect	transform (const QwtDoubleRect &) const
QwtDoublePoint	invTransform (const QPoint &) const
QPoint	transform (const QwtDoublePoint &) const
virtual QwtText	trackerText (const QPoint &) const
virtual QwtText	trackerText (const QwtDoublePoint &) const
virtual void	move (const QPoint &)
virtual void	append (const QPoint &)
virtual bool	end (bool ok=true)

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Constructor & Destructor Documentation

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

Create a plot picker. The picker is set to those x- and y-axis of the plot that are enabled. If both or no x-axis are enabled, the picker is set to QwtPlot::xBottom. If both or no y-axis are enabled, it is set to QwtPlot::yLeft. Parameters: canvas  Plot canvas to observe, also the parent object See also: QwtPlot::autoReplot(), QwtPlot::replot(), QwtPlotPicker::scaleRect() Definition at line 32 of file qwt_plot_picker.cpp. References QwtPlot::axisEnabled(), canvas(), plot(), and xAxis().

QwtPlotPicker::QwtPlotPicker (  int  xAxis, int  yAxis, QwtPlotCanvas *  canvas )  [explicit]

Create a plot picker Parameters: xAxis  Set the x axis of the picker yAxis  Set the y axis of the picker canvas  Plot canvas to observe, also the parent object See also: QwtPlot::autoReplot(), QwtPlot::replot(), QwtPlotPicker::scaleRect() Definition at line 70 of file qwt_plot_picker.cpp.

QwtPlotPicker::QwtPlotPicker (  int  xAxis, int  yAxis, int  selectionFlags, RubberBand  rubberBand, DisplayMode  trackerMode, QwtPlotCanvas *  canvas )  [explicit]

Create a plot picker Parameters: xAxis  X axis of the picker yAxis  Y axis of the picker selectionFlags  Or'd value of SelectionType, RectSelectionType and SelectionMode rubberBand  Rubberband style trackerMode  Tracker mode canvas  Plot canvas to observe, also the parent object See also: QwtPicker, QwtPicker::setSelectionFlags(), QwtPicker::setRubberBand(), QwtPicker::setTrackerMode QwtPlot::autoReplot(), QwtPlot::replot(), QwtPlotPicker::scaleRect() Definition at line 93 of file qwt_plot_picker.cpp.

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Member Function Documentation

void QwtPlotPicker::append (  const QPoint &  pos  )  [protected, virtual]

Append a point to the selection and update rubberband and tracker. Parameters: pos  Additional point See also: isActive, begin(), end(), move(), appended() Note: The appended(const QPoint &), appended(const QDoublePoint &) signals are emitted. Reimplemented from QwtPicker. Definition at line 244 of file qwt_plot_picker.cpp. References QwtPicker::append(), appended(), and invTransform().

void QwtPlotPicker::appended (  const QwtDoublePoint &  pos  )  [signal]

A signal emitted when a point has been appended to the selection Parameters: pos  Position of the appended point. See also: append(). moved() Referenced by append().

const QwtPlotCanvas * QwtPlotPicker::canvas (   )  const

Return Observed plot canvas. Definition at line 113 of file qwt_plot_picker.cpp.

QwtPlotCanvas * QwtPlotPicker::canvas (   )

Return observed plot canvas. Definition at line 103 of file qwt_plot_picker.cpp. References QwtPicker::parentWidget(). Referenced by plot(), QwtPlotPicker(), and QwtPlotZoomer::QwtPlotZoomer().

bool QwtPlotPicker::end (  bool  ok = true  )  [protected, virtual]

Close a selection setting the state to inactive. Parameters: ok  If true, complete the selection and emit selected signals otherwise discard the selection. Returns: true if the selection is accepted, false otherwise Reimplemented from QwtPicker. Reimplemented in QwtPlotZoomer. Definition at line 273 of file qwt_plot_picker.cpp. References QwtPicker::end(), invTransform(), plot(), selected(), QwtPicker::selection(), and QwtPicker::selectionFlags(). Referenced by QwtPlotZoomer::end().

QwtDoublePoint QwtPlotPicker::invTransform (  const QPoint &  pos  )  const [protected]

Translate a point from pixel into plot coordinates Returns: Point in plot coordinates See also: QwtPlotPicker::transform() Definition at line 369 of file qwt_plot_picker.cpp. References QwtPlot::canvasMap(), QwtScaleMap::invTransform(), and plot().

QwtDoubleRect QwtPlotPicker::invTransform (  const QRect &  rect  )  const [protected]

Translate a rectangle from pixel into plot coordinates Returns: Rectangle in plot coordinates See also: QwtPlotPicker::transform() Definition at line 332 of file qwt_plot_picker.cpp. References QwtPlot::canvasMap(), QwtScaleMap::invTransform(), and plot(). Referenced by append(), QwtPlotZoomer::end(), end(), move(), and trackerText().

void QwtPlotPicker::move (  const QPoint &  pos  )  [protected, virtual]

Move the last point of the selection Parameters: pos  New position See also: isActive, begin(), end(), append() Note: The moved(const QPoint &), moved(const QDoublePoint &) signals are emitted. Reimplemented from QwtPicker. Definition at line 259 of file qwt_plot_picker.cpp. References invTransform(), QwtPicker::move(), and moved().

void QwtPlotPicker::moved (  const QwtDoublePoint &  pos  )  [signal]

A signal emitted whenever the last appended point of the selection has been moved. Parameters: pos  Position of the moved last point of the selection. See also: move(), appended() Referenced by move().

const QwtPlot * QwtPlotPicker::plot (   )  const

Return plot widget, containing the observed plot canvas. Definition at line 133 of file qwt_plot_picker.cpp.

QwtPlot * QwtPlotPicker::plot (   )

Return plot widget, containing the observed plot canvas. Definition at line 119 of file qwt_plot_picker.cpp. References canvas(). Referenced by QwtPlotZoomer::end(), end(), invTransform(), QwtPlotPicker(), QwtPlotZoomer::rescale(), scaleRect(), setAxis(), QwtPlotZoomer::setZoomBase(), and transform().

QwtDoubleRect QwtPlotPicker::scaleRect (   )  const [protected]

Return normalized bounding rect of the axes See also: QwtPlot::autoReplot(), QwtPlot::replot(). Definition at line 143 of file qwt_plot_picker.cpp. References QwtPlot::axisScaleDiv(), QwtScaleDiv::lBound(), plot(), QwtScaleDiv::range(), xAxis(), and yAxis(). Referenced by QwtPlotZoomer::rescale(), QwtPlotZoomer::setAxis(), and QwtPlotZoomer::setZoomBase().

void QwtPlotPicker::selected (  const QwtArray< QwtDoublePoint > &  pa  )  [signal]

A signal emitting the selected points, at the end of a selection. Parameters: pa  Selected points

void QwtPlotPicker::selected (  const QwtDoubleRect &  rect  )  [signal]

A signal emitted in case of selectionFlags() & RectSelection. Parameters: rect  Selected rectangle

void QwtPlotPicker::selected (  const QwtDoublePoint &  pos  )  [signal]

A signal emitted in case of selectionFlags() & PointSelection. Parameters: pos  Selected point Referenced by end().

void QwtPlotPicker::setAxis (  int  xAxis, int  yAxis )  [virtual]

Set the x and y axes of the picker Parameters: xAxis  X axis yAxis  Y axis Reimplemented in QwtPlotZoomer. Definition at line 169 of file qwt_plot_picker.cpp. References plot(). Referenced by QwtPlotZoomer::setAxis().

QwtText QwtPlotPicker::trackerText (  const QwtDoublePoint &  pos  )  const [protected, virtual]

Translate a position into a position string. In case of HLineRubberBand the label is the value of the y position, in case of VLineRubberBand the value of the x position. Otherwise the label contains x and y position separated by a ',' . The format for the double to string conversion is "%.4f". Parameters: pos  Position Returns: Position string Definition at line 217 of file qwt_plot_picker.cpp. References QwtPicker::rubberBand().

QwtText QwtPlotPicker::trackerText (  const QPoint &  pos  )  const [protected, virtual]

Translate a pixel position into a position string Parameters: pos  Position in pixel coordinates Returns: Position string Reimplemented from QwtPicker. Definition at line 200 of file qwt_plot_picker.cpp. References invTransform().

QPoint QwtPlotPicker::transform (  const QwtDoublePoint &  pos  )  const [protected]

Translate a point from plot into pixel coordinates Returns: Point in pixel coordinates See also: QwtPlotPicker::invTransform() Definition at line 385 of file qwt_plot_picker.cpp. References QwtPlot::canvasMap(), plot(), and QwtScaleMap::transform().

QRect QwtPlotPicker::transform (  const QwtDoubleRect &  rect  )  const [protected]

Translate a rectangle from plot into pixel coordinates Returns: Rectangle in pixel coordinates See also: QwtPlotPicker::invTransform() Definition at line 351 of file qwt_plot_picker.cpp. References QwtPlot::canvasMap(), plot(), and QwtScaleMap::transform().

int QwtPlotPicker::xAxis (   )  const

Return x axis. Definition at line 183 of file qwt_plot_picker.cpp. Referenced by QwtPlotPicker(), QwtPlotZoomer::rescale(), scaleRect(), and QwtPlotZoomer::setAxis().

int QwtPlotPicker::yAxis (   )  const

Return y axis. Definition at line 189 of file qwt_plot_picker.cpp. Referenced by QwtPlotZoomer::rescale(), scaleRect(), and QwtPlotZoomer::setAxis().

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