QwtPlotPicker(3) Qwt User's Guide QwtPlotPicker(3)NAMEQwtPlotPicker-
SYNOPSIS
#include <qwt_plot_picker.h>
Inherits QwtPicker.
Inherited by QwtPlotZoomer.
Signals
void appended (const QwtDoublePoint &pos)
void moved (const QwtDoublePoint &pos)
void selected (const QwtDoublePoint &pos)
void selected (const QwtDoubleRect &rect)
void selected (const QwtArray< QwtDoublePoint > &pa)
Public Member Functions
QwtPlotPicker (QwtPlotCanvas *)
QwtPlotPicker (int xAxis, int yAxis, QwtPlotCanvas *)
QwtPlotPicker (int xAxis, int yAxis, int selectionFlags, RubberBand
rubberBand, DisplayMode trackerMode, QwtPlotCanvas *)
virtual ~QwtPlotPicker ()
QwtPlotCanvas * canvas ()
const QwtPlotCanvas * canvas () const
QwtPlot * plot ()
const QwtPlot * plot () const
virtual void setAxis (int xAxis, int yAxis)
int xAxis () const
int yAxis () const
Protected Member Functions
virtual void append (const QPoint &)
virtual bool end (bool ok=true)
QwtDoubleRect invTransform (const QRect &) const
QwtDoublePoint invTransform (const QPoint &) const
virtual void move (const QPoint &)
QwtDoubleRect scaleRect () const
virtual QwtText trackerText (const QPoint &) const
virtual QwtText trackerText (const QwtDoublePoint &) const
QRect transform (const QwtDoubleRect &) const
QPoint transform (const QwtDoublePoint &) const
Additional Inherited Members
Detailed DescriptionQwtPlotPicker 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.
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()
QwtPlotPicker::QwtPlotPicker (intxAxis, intyAxis, 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()
QwtPlotPicker::QwtPlotPicker (intxAxis, intyAxis, intselectionFlags,
RubberBandrubberBand, DisplayModetrackerMode, 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()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.
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()
bool QwtPlotPicker::end (boolok = 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.
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()
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()
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.
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()
QwtDoubleRect QwtPlotPicker::scaleRect () const [protected]
Return normalized bounding rect of the axes
See also:
QwtPlot::autoReplot(), QwtPlot::replot().
void QwtPlotPicker::selected (const QwtDoublePoint &pos) [signal]
A signal emitted in case of selectionFlags() & PointSelection.
Parameters:
pos Selected point
void QwtPlotPicker::selected (const QwtDoubleRect &rect) [signal]
A signal emitted in case of selectionFlags() & RectSelection.
Parameters:
rect Selected rectangle
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::setAxis (intxAxis, intyAxis) [virtual]
Set the x and y axes of the picker
Parameters:
xAxis X axis
yAxis Y axis
Reimplemented in QwtPlotZoomer.
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.
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
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()
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()Author
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Version 5.2.3 Tue Nov 20 2012 QwtPlotPicker(3)
