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QwtPlotPicker
Langue: en
Version: 377150 (fedora - 01/12/10)
Section: 3 (Bibliothèques de fonctions)
Sommaire
- NAME
- SYNOPSIS
- Detailed Description
- Constructor & Destructor Documentation
- QwtPlotPicker::QwtPlotPicker (QwtPlotCanvas * canvas) [explicit]
- QwtPlotPicker::~QwtPlotPicker () [virtual]
- QwtPlotPicker::QwtPlotPicker (int xAxis, int yAxis, QwtPlotCanvas * canvas) [explicit]Create a plot picker
- QwtPlotPicker::QwtPlotPicker (int xAxis, int yAxis, int selectionFlags, RubberBand rubberBand, DisplayMode trackerMode, QwtPlotCanvas * canvas) [explicit]Create a plot picker
- Member Function Documentation
- void QwtPlotPicker::append (const QPoint & pos) [protected, virtual]Append a point to the selection and update rubberband and tracker.
- void QwtPlotPicker::appended (const QwtDoublePoint & pos) [signal]A signal emitted when a point has been appended to the selection
- const QwtPlotCanvas * QwtPlotPicker::canvas () const
- QwtPlotCanvas * QwtPlotPicker::canvas ()
- bool QwtPlotPicker::end (bool ok = true) [protected, virtual]Close a selection setting the state to inactive.
- QwtDoublePoint QwtPlotPicker::invTransform (const QPoint & pos) const [protected]Translate a point from pixel into plot coordinates
- QwtDoubleRect QwtPlotPicker::invTransform (const QRect & rect) const [protected]Translate a rectangle from pixel into plot coordinates
- void QwtPlotPicker::move (const QPoint & pos) [protected, virtual]Move the last point of the selection
- void QwtPlotPicker::moved (const QwtDoublePoint & pos) [signal]A signal emitted whenever the last appended point of the selection has been moved.
- const QwtPlot * QwtPlotPicker::plot () const
- QwtPlot * QwtPlotPicker::plot ()
- QwtDoubleRect QwtPlotPicker::scaleRect () const [protected]Return normalized bounding rect of the axes
- void QwtPlotPicker::selected (const QwtArray< QwtDoublePoint > & pa) [signal]A signal emitting the selected points, at the end of a selection.
- void QwtPlotPicker::selected (const QwtDoubleRect & rect) [signal]A signal emitted in case of selectionFlags() & RectSelection.
- void QwtPlotPicker::selected (const QwtDoublePoint & pos) [signal]A signal emitted in case of selectionFlags() & PointSelection.
- void QwtPlotPicker::setAxis (int xAxis, int yAxis) [virtual]Set the x and y axes of the picker
- QwtText QwtPlotPicker::trackerText (const QwtDoublePoint & pos) const [protected, virtual]
- QwtText QwtPlotPicker::trackerText (const QPoint & pos) const [protected, virtual]Translate a pixel position into a position string
- QPoint QwtPlotPicker::transform (const QwtDoublePoint & pos) const [protected]Translate a point from plot into pixel coordinates
- QRect QwtPlotPicker::transform (const QwtDoubleRect & rect) const [protected]Translate a rectangle from plot into pixel coordinates
- int QwtPlotPicker::xAxis () const
- int QwtPlotPicker::yAxis () const
- Author
NAME
QwtPlotPicker -QwtPlotPicker provides selections on a plot canvas.
SYNOPSIS
#include <qwt_plot_picker.h>
Inherits QwtPicker.
Inherited by QwtPlotZoomer.
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 *)
virtual ~QwtPlotPicker ()
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)
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.
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 () [virtual]
Destructor.
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()
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()
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()
const QwtPlotCanvas * QwtPlotPicker::canvas () const
Return Observed plot canvas.
QwtPlotCanvas * QwtPlotPicker::canvas ()
Return observed plot canvas.
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.
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()
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()
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()
const QwtPlot * QwtPlotPicker::plot () const
Return plot widget, containing the observed plot canvas.
QwtPlot * QwtPlotPicker::plot ()
Return plot widget, containing the observed plot canvas.
QwtDoubleRect QwtPlotPicker::scaleRect () const [protected]Return normalized bounding rect of the axes
See also:
- QwtPlot::autoReplot(), QwtPlot::replot().
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
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.
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
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.
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()
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()
int QwtPlotPicker::xAxis () const
Return x axis.
int QwtPlotPicker::yAxis () const
Return y axis.
Author
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