NAME
QwtPlotPicker -
SYNOPSIS
Inherits QwtPicker.
Inherited by QwtPlotZoomer.
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.
Warning:
Calling QwtPlot::setAxisScale() while QwtPlot::autoReplot() is
FALSE leaves the axis in an ’intermediate’ state. In this case, to
prevent buggy behaviour, your must call QwtPlot::replot() before
calling QwtPlotPicker::scaleRect(), QwtPlotZoomer::scaleRect(),
QwtPlotPicker::QwtPlotPicker() or QwtPlotZoomer::QwtPlotZoomer().
This quirk will be removed in a future release.
Definition at line 38 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 *, const char *name=0)
QwtPlotPicker (int xAxis, int yAxis, QwtPlotCanvas *, const char
*name=0)
QwtPlotPicker (int xAxis, int yAxis, int selectionFlags, RubberBand
rubberBand, DisplayMode cursorLabelMode, QwtPlotCanvas *, const
char *name=0)
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 QString cursorLabel (const QPoint &) const
virtual QString cursorLabel (const QwtDoublePoint &) const
virtual void move (const QPoint &)
virtual void append (const QPoint &)
virtual bool end (bool ok=TRUE)
Constructor & Destructor Documentation
QwtPlotPicker::QwtPlotPicker (QwtPlotCanvas * canvas, const char * name =
0)
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
name Object name
Warning:
Calling QwtPlot::setAxisScale() while QwtPlot::autoReplot() is
FALSE leaves the axis in an ’intermediate’ state. In this case, to
prevent buggy behaviour, you must call QwtPlot::replot() before
calling QwtPlotPicker(). This quirk will be removed in a future
release.
See also:
QwtPlot::autoReplot(), QwtPlot::replot(),
QwtPlotPicker::scaleRect()
Definition at line 38 of file qwt_plot_picker.cpp.
References QwtPlot::axisEnabled(), plot(), setAxis(), xAxis(), and
yAxis().
QwtPlotPicker::QwtPlotPicker (int xAxis, int yAxis, QwtPlotCanvas * canvas,
const char * name = 0)
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
name Object name
Warning:
Calling QwtPlot::setAxisScale() while QwtPlot::autoReplot() is
FALSE leaves the axis in an ’intermediate’ state. In this case, to
prevent buggy behaviour, you must call QwtPlot::replot() before
calling QwtPlotPicker(). This quirk will be removed in a future
release.
See also:
QwtPlot::autoReplot(), QwtPlot::replot(),
QwtPlotPicker::scaleRect()
Definition at line 83 of file qwt_plot_picker.cpp.
QwtPlotPicker::QwtPlotPicker (int xAxis, int yAxis, int selectionFlags,
RubberBand rubberBand, DisplayMode cursorLabelMode, QwtPlotCanvas *
canvas, const char * name = 0)
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
cursorLabelMode Cursor label mode
canvas Plot canvas to observe, also the parent object
name Object name
See also:
QwtPicker, QwtPicker::setSelectionFlags(),
QwtPicker::setRubberBand(), QwtPicker::setCursorLabelMode
Warning:
Calling QwtPlot::setAxisScale() while QwtPlot::autoReplot() is
FALSE leaves the axis in an ’intermediate’ state. In this case, to
prevent buggy behaviour, you must call QwtPlot::replot() before
calling QwtPlotPicker(). This quirk will be removed in a future
release.
See also:
QwtPlot::autoReplot(), QwtPlot::replot(),
QwtPlotPicker::scaleRect()
Definition at line 114 of file qwt_plot_picker.cpp.
Member Function Documentation
void QwtPlotPicker::append (const QPoint & pos) [protected, virtual]
Append a point to the selection and update rubberband and cursor label.
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 261 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 134 of file qwt_plot_picker.cpp.
QwtPlotCanvas * QwtPlotPicker::canvas ()
Return observed plot canvas.
Definition at line 124 of file qwt_plot_picker.cpp.
References QwtPicker::parentWidget().
Referenced by plot().
QString QwtPlotPicker::cursorLabel (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 238 of file qwt_plot_picker.cpp.
References QwtPicker::rubberBand(), QwtDoublePoint::x(), and
QwtDoublePoint::y().
QString QwtPlotPicker::cursorLabel (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 221 of file qwt_plot_picker.cpp.
References invTransform().
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 290 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 385 of file qwt_plot_picker.cpp.
References QwtPlot::canvasMap(), QwtDiMap::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 349 of file qwt_plot_picker.cpp.
References QwtPlot::canvasMap(), QwtDiMap::invTransform(), and plot().
Referenced by append(), cursorLabel(), QwtPlotZoomer::end(), end(), and
move().
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 276 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 154 of file qwt_plot_picker.cpp.
QwtPlot * QwtPlotPicker::plot ()
Return plot widget, containing the observed plot canvas.
Definition at line 140 of file qwt_plot_picker.cpp.
References canvas().
Referenced by QwtPlotZoomer::end(), end(), invTransform(),
QwtPlotZoomer::minZoomSize(), QwtPlotPicker(),
QwtPlotZoomer::rescale(), scaleRect(), setAxis(),
QwtPlotZoomer::setZoomBase(), and transform().
QwtDoubleRect QwtPlotPicker::scaleRect () const [protected]
Return normalized bounding rect of the axes
Warning:
Calling QwtPlot::setAxisScale() while QwtPlot::autoReplot() is
FALSE leaves the axis in an ’intermediate’ state. In this case, to
prevent buggy behaviour, you must call QwtPlot::replot() before
calling QwtPlotPicker::scaleRect(). This quirk will be removed in a
future release.
See also:
QwtPlot::autoReplot(), QwtPlot::replot().
Definition at line 170 of file qwt_plot_picker.cpp.
References QwtPlot::axisScale(), QwtScaleDiv::hBound(),
QwtScaleDiv::lBound(), plot(), 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 190 of file qwt_plot_picker.cpp.
References plot().
Referenced by QwtPlotPicker(), and QwtPlotZoomer::setAxis().
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 401 of file qwt_plot_picker.cpp.
References QwtPlot::canvasMap(), plot(), QwtDiMap::transform(),
QwtDoublePoint::x(), and QwtDoublePoint::y().
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 367 of file qwt_plot_picker.cpp.
References QwtPlot::canvasMap(), plot(), QwtDiMap::transform(),
QwtDoubleRect::x1(), QwtDoubleRect::x2(), QwtDoubleRect::y1(), and
QwtDoubleRect::y2().
int QwtPlotPicker::xAxis () const
Return x axis.
Definition at line 204 of file qwt_plot_picker.cpp.
Referenced by QwtPlotZoomer::minZoomSize(), QwtPlotPicker(),
QwtPlotZoomer::rescale(), scaleRect(), and QwtPlotZoomer::setAxis().
int QwtPlotPicker::yAxis () const
Return y axis.
Definition at line 210 of file qwt_plot_picker.cpp.
Referenced by QwtPlotZoomer::minZoomSize(), QwtPlotPicker(),
QwtPlotZoomer::rescale(), scaleRect(), and QwtPlotZoomer::setAxis().
Author
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