Man page - qwtplotpicker(3)
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Manual
QwtPlotPicker
NAMESYNOPSIS
Signals
Public Member Functions
Protected Member Functions
Additional Inherited Members
Detailed Description
Constructor & Destructor Documentation
QwtPlotPicker::QwtPlotPicker (QWidget * canvas) [explicit]
QwtPlotPicker::QwtPlotPicker (int xAxis, int yAxis, QWidget * canvas)[explicit]
QwtPlotPicker::QwtPlotPicker (int xAxis, int yAxis, RubberBand rubberBand,DisplayMode trackerMode, QWidget * canvas) [explicit]
Member Function Documentation
void QwtPlotPicker::append (const QPoint & pos) [protected], [virtual]
void QwtPlotPicker::appended (const QPointF & pos) [signal]
QWidget * QwtPlotPicker::canvas ()
const QWidget * QwtPlotPicker::canvas () const
bool QwtPlotPicker::end (bool ok = true) [protected], [virtual]
QRectF QwtPlotPicker::invTransform (const QRect & rect) const [protected]
QPointF QwtPlotPicker::invTransform (const QPoint & pos) const [protected]
void QwtPlotPicker::move (const QPoint & pos) [protected], [virtual]
void QwtPlotPicker::moved (const QPointF & pos) [signal]
QwtPlot * QwtPlotPicker::plot ()
const QwtPlot * QwtPlotPicker::plot () const
QRectF QwtPlotPicker::scaleRect () const [protected]
void QwtPlotPicker::selected (const QPointF & pos) [signal]
void QwtPlotPicker::selected (const QRectF & rect) [signal]
void QwtPlotPicker::selected (const QVector< QPointF > & pa) [signal]
void QwtPlotPicker::setAxis (int xAxis, int yAxis) [virtual]
QwtText QwtPlotPicker::trackerText (const QPoint & pos) const [protected],[virtual]
QwtText QwtPlotPicker::trackerTextF (const QPointF & pos) const[protected], [virtual]
QRect QwtPlotPicker::transform (const QRectF & rect) const [protected]
QPoint QwtPlotPicker::transform (const QPointF & pos) const [protected]
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 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
(int
xAxis
, int
yAxis
,
QWidget *)
QwtPlotPicker
(int
xAxis
, int
yAxis
,
RubberBand rubberBand
,
DisplayMode
trackerMode
, QWidget *)
virtual void
setAxis
(int
xAxis
, int
yAxis
)
int
xAxis
() const
Return x axis.
int
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
virtual
QwtText trackerTextF
(const QPointF &)
const
Translate a position into a position string.
virtual void
move
(const QPoint &)
virtual void
append
(const QPoint &)
virtual bool
end
(bool ok=true)
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.
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 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() , scaleRect()
QwtPlotPicker::QwtPlotPicker (int xAxis, int yAxis, QWidget * 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() , scaleRect()
QwtPlotPicker::QwtPlotPicker (int xAxis, int yAxis, 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()
Member Function Documentation
void QwtPlotPicker::append (const QPoint & pos) [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 .
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
const QWidget * QwtPlotPicker::canvas () const
Returns:
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 has been accepted, false otherwise
Reimplemented from QwtPicker .
Reimplemented in QwtPlotZoomer .
QRectF QwtPlotPicker::invTransform (const QRect & rect) const [protected]
Translate a rectangle from pixel into plot coordinates
Returns:
Rectangle in plot coordinates
See also:
transform()
QPointF QwtPlotPicker::invTransform (const QPoint & pos) const [protected]
Translate a point from pixel into plot coordinates
Returns:
Point in plot coordinates
See also:
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 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
const QwtPlot * QwtPlotPicker::plot () const
Returns:
Plot widget, containing the observed plot canvas
QRectF QwtPlotPicker::scaleRect () const [protected]
Returns:
Normalized bounding rectangle of the axes
See also:
QwtPlot::autoReplot() , QwtPlot::replot() .
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::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 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::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
QRect QwtPlotPicker::transform (const QRectF & rect) const [protected]
Translate a rectangle from plot into pixel coordinates
Returns:
Rectangle in pixel coordinates
See also:
invTransform()
QPoint QwtPlotPicker::transform (const QPointF & pos) const [protected]
Translate a point from plot into pixel coordinates
Returns:
Point in pixel coordinates
See also:
invTransform()
Author
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