QwtPlotPicker - Man Page
QwtPlotPicker provides selections on a plot canvas.
Synopsis
#include <qwt_plot_picker.h>
Inherits QwtPicker.
Inherited by QwtPlotZoomer.
Signals
void selected (const QPointF &pos)
void selected (const QRectF &rect)
void selected (const QVector< QPointF > &pa)
void appended (const QPointF &pos)
void moved (const QPointF &pos)
Public Member Functions
QwtPlotPicker (QWidget *canvas)
Create a plot picker.
virtual ~QwtPlotPicker ()
Destructor.
QwtPlotPicker (QwtAxisId xAxisId, QwtAxisId yAxisId, QWidget *)
QwtPlotPicker (QwtAxisId xAxisId, QwtAxisId yAxisId, RubberBand rubberBand, DisplayMode trackerMode, QWidget *)
virtual void setAxes (QwtAxisId xAxisId, QwtAxisId yAxisId)
QwtAxisId xAxis () const
Return x axis.
QwtAxisId yAxis () const
Return y axis.
QwtPlot * plot ()
const QwtPlot * plot () const
QWidget * canvas ()
const QWidget * canvas () const
Protected Member Functions
QRectF scaleRect () const
QRectF invTransform (const QRect &) const
QRect transform (const QRectF &) const
QPointF invTransform (const QPoint &) const
QPoint transform (const QPointF &) const
virtual QwtText trackerText (const QPoint &) const override
virtual QwtText trackerTextF (const QPointF &) const
Translate a position into a position string.
virtual void move (const QPoint &) override
virtual void append (const QPoint &) override
virtual bool end (bool ok=true) override
Additional Inherited Members
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 coordinate system.
Definition at line 33 of file qwt_plot_picker.h.
Constructor & Destructor Documentation
QwtPlotPicker::QwtPlotPicker (QWidget * 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 QwtAxis::XBottom. If both or no y-axis are enabled, it is set to QwtAxis::YLeft.
- Parameters
canvas Plot canvas to observe, also the parent object
- See also
QwtPlot::autoReplot(), QwtPlot::replot(), scaleRect()
Definition at line 43 of file qwt_plot_picker.cpp.
QwtPlotPicker::QwtPlotPicker (QwtAxisId xAxisId, QwtAxisId yAxisId, QWidget * canvas) [explicit]
Create a plot picker
- Parameters
xAxisId X axis of the picker
yAxisId Y axis of the picker
canvas Plot canvas to observe, also the parent object- See also
QwtPlot::autoReplot(), QwtPlot::replot(), scaleRect()
Definition at line 76 of file qwt_plot_picker.cpp.
QwtPlotPicker::QwtPlotPicker (QwtAxisId xAxisId, QwtAxisId yAxisId, RubberBand rubberBand, DisplayMode trackerMode, QWidget * canvas) [explicit]
Create a plot picker
- Parameters
xAxis X axis of the picker
yAxis Y axis of the picker
rubberBand Rubber band 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(), scaleRect()
Definition at line 98 of file qwt_plot_picker.cpp.
Member Function Documentation
void QwtPlotPicker::append (const QPoint & pos) [override], [protected], [virtual]
Append a point to the selection and update rubber band 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 251 of file qwt_plot_picker.cpp.
void QwtPlotPicker::appended (const QPointF & 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()
QWidget * QwtPlotPicker::canvas ()
- Returns
Observed plot canvas
Definition at line 114 of file qwt_plot_picker.cpp.
const QWidget * QwtPlotPicker::canvas () const
- Returns
Observed plot canvas
Definition at line 120 of file qwt_plot_picker.cpp.
bool QwtPlotPicker::end (bool ok = true) [override], [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 has been accepted, false otherwise
Reimplemented from QwtPicker.
Reimplemented in QwtPlotZoomer.
Definition at line 280 of file qwt_plot_picker.cpp.
QPointF QwtPlotPicker::invTransform (const QPoint & pos) const [protected]
Translate a point from pixel into plot coordinates
- Returns
Point in plot coordinates
- See also
transform()
Definition at line 367 of file qwt_plot_picker.cpp.
QRectF QwtPlotPicker::invTransform (const QRect & rect) const [protected]
Translate a rectangle from pixel into plot coordinates
- Returns
Rectangle in plot coordinates
- See also
transform()
Definition at line 341 of file qwt_plot_picker.cpp.
void QwtPlotPicker::move (const QPoint & pos) [override], [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 266 of file qwt_plot_picker.cpp.
void QwtPlotPicker::moved (const QPointF & 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()
QwtPlot * QwtPlotPicker::plot ()
- Returns
Plot widget, containing the observed plot canvas
Definition at line 126 of file qwt_plot_picker.cpp.
const QwtPlot * QwtPlotPicker::plot () const
- Returns
Plot widget, containing the observed plot canvas
Definition at line 136 of file qwt_plot_picker.cpp.
QRectF QwtPlotPicker::scaleRect () const [protected]
- Returns
Normalized bounding rectangle of the axes
- See also
QwtPlot::autoReplot(), QwtPlot::replot().
Definition at line 149 of file qwt_plot_picker.cpp.
void QwtPlotPicker::selected (const QPointF & pos) [signal]
A signal emitted in case of QwtPickerMachine::PointSelection.
- Parameters
pos Selected point
void QwtPlotPicker::selected (const QRectF & rect) [signal]
A signal emitted in case of QwtPickerMachine::RectSelection.
- Parameters
rect Selected rectangle
void QwtPlotPicker::selected (const QVector< QPointF > & pa) [signal]
A signal emitting the selected points, at the end of a selection.
- Parameters
pa Selected points
void QwtPlotPicker::setAxes (QwtAxisId xAxisId, QwtAxisId yAxisId) [virtual]
Set the x and y axes of the picker
- Parameters
xAxisId X axis
yAxisId Y axis
Reimplemented in QwtPlotZoomer.
Definition at line 172 of file qwt_plot_picker.cpp.
QwtText QwtPlotPicker::trackerText (const QPoint & pos) const [override], [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 203 of file qwt_plot_picker.cpp.
QwtText QwtPlotPicker::trackerTextF (const QPointF & 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 223 of file qwt_plot_picker.cpp.
QPoint QwtPlotPicker::transform (const QPointF & pos) const [protected]
Translate a point from plot into pixel coordinates
- Returns
Point in pixel coordinates
- See also
invTransform()
Definition at line 383 of file qwt_plot_picker.cpp.
QRect QwtPlotPicker::transform (const QRectF & rect) const [protected]
Translate a rectangle from plot into pixel coordinates
- Returns
Rectangle in pixel coordinates
- See also
invTransform()
Definition at line 354 of file qwt_plot_picker.cpp.
Author
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