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Qwt User's Guide
6.1.3
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QwtPlotPicker provides selections on a plot canvas. More...
#include <qwt_plot_picker.h>

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) |
Signals inherited from QwtPicker | |
| void | activated (bool on) |
| void | selected (const QPolygon &polygon) |
| void | appended (const QPoint &pos) |
| void | moved (const QPoint &pos) |
| void | removed (const QPoint &pos) |
| void | changed (const QPolygon &selection) |
Public Member Functions | |
| QwtPlotPicker (QWidget *canvas) | |
| Create a plot picker. More... | |
| 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 |
Public Member Functions inherited from QwtPicker | |
| QwtPicker (QWidget *parent) | |
| QwtPicker (RubberBand rubberBand, DisplayMode trackerMode, QWidget *) | |
| virtual | ~QwtPicker () |
| Destructor. | |
| void | setStateMachine (QwtPickerMachine *) |
| const QwtPickerMachine * | stateMachine () const |
| QwtPickerMachine * | stateMachine () |
| void | setRubberBand (RubberBand) |
| RubberBand | rubberBand () const |
| void | setTrackerMode (DisplayMode) |
| Set the display mode of the tracker. More... | |
| DisplayMode | trackerMode () const |
| void | setResizeMode (ResizeMode) |
| Set the resize mode. More... | |
| ResizeMode | resizeMode () const |
| void | setRubberBandPen (const QPen &) |
| QPen | rubberBandPen () const |
| void | setTrackerPen (const QPen &) |
| QPen | trackerPen () const |
| void | setTrackerFont (const QFont &) |
| QFont | trackerFont () const |
| bool | isEnabled () const |
| bool | isActive () const |
| virtual bool | eventFilter (QObject *, QEvent *) |
| Event filter. More... | |
| QWidget * | parentWidget () |
| Return the parent widget, where the selection happens. | |
| const QWidget * | parentWidget () const |
| Return the parent widget, where the selection happens. | |
| virtual QPainterPath | pickArea () const |
| virtual void | drawRubberBand (QPainter *) const |
| virtual void | drawTracker (QPainter *) const |
| virtual QRegion | rubberBandMask () const |
| QPoint | trackerPosition () const |
| virtual QRect | trackerRect (const QFont &) const |
| QPolygon | selection () const |
Public Member Functions inherited from QwtEventPattern | |
| QwtEventPattern () | |
| virtual | ~QwtEventPattern () |
| Destructor. | |
| void | initMousePattern (int numButtons) |
| void | initKeyPattern () |
| void | setMousePattern (MousePatternCode, Qt::MouseButton button, Qt::KeyboardModifiers=Qt::NoModifier) |
| void | setKeyPattern (KeyPatternCode, int keyCode, Qt::KeyboardModifiers modifierCodes=Qt::NoModifier) |
| void | setMousePattern (const QVector< MousePattern > &) |
| Change the mouse event patterns. | |
| void | setKeyPattern (const QVector< KeyPattern > &) |
| Change the key event patterns. | |
| const QVector< MousePattern > & | mousePattern () const |
| const QVector< KeyPattern > & | keyPattern () const |
| QVector< MousePattern > & | mousePattern () |
| QVector< KeyPattern > & | keyPattern () |
| bool | mouseMatch (MousePatternCode, const QMouseEvent *) const |
| Compare a mouse event with an event pattern. More... | |
| bool | keyMatch (KeyPatternCode, const QKeyEvent *) const |
| Compare a key event with an event pattern. More... | |
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. More... | |
| virtual void | move (const QPoint &) |
| virtual void | append (const QPoint &) |
| virtual bool | end (bool ok=true) |
Protected Member Functions inherited from QwtPicker | |
| virtual QPolygon | adjustedPoints (const QPolygon &) const |
| Map the pickedPoints() into a selection() More... | |
| virtual void | transition (const QEvent *) |
| virtual void | begin () |
| virtual void | remove () |
| virtual bool | accept (QPolygon &) const |
| Validate and fix up the selection. More... | |
| virtual void | reset () |
| virtual void | widgetMousePressEvent (QMouseEvent *) |
| virtual void | widgetMouseReleaseEvent (QMouseEvent *) |
| virtual void | widgetMouseDoubleClickEvent (QMouseEvent *) |
| virtual void | widgetMouseMoveEvent (QMouseEvent *) |
| virtual void | widgetWheelEvent (QWheelEvent *) |
| virtual void | widgetKeyPressEvent (QKeyEvent *) |
| virtual void | widgetKeyReleaseEvent (QKeyEvent *) |
| virtual void | widgetEnterEvent (QEvent *) |
| virtual void | widgetLeaveEvent (QEvent *) |
| virtual void | stretchSelection (const QSize &oldSize, const QSize &newSize) |
| virtual void | updateDisplay () |
| Update the state of rubber band and tracker label. | |
| const QwtWidgetOverlay * | rubberBandOverlay () const |
| const QwtWidgetOverlay * | trackerOverlay () const |
| const QPolygon & | pickedPoints () const |
Protected Member Functions inherited from QwtEventPattern | |
| virtual bool | mouseMatch (const MousePattern &, const QMouseEvent *) const |
| Compare a mouse event with an event pattern. More... | |
| virtual bool | keyMatch (const KeyPattern &, const QKeyEvent *) const |
| Compare a key event with an event pattern. More... | |
Additional Inherited Members | |
Public Types inherited from QwtPicker | |
| enum | RubberBand { NoRubberBand = 0, HLineRubberBand, VLineRubberBand, CrossRubberBand, RectRubberBand, EllipseRubberBand, PolygonRubberBand, UserRubberBand = 100 } |
| enum | DisplayMode { AlwaysOff, AlwaysOn, ActiveOnly } |
| Display mode. More... | |
| enum | ResizeMode { Stretch, KeepSize } |
Public Types inherited from QwtEventPattern | |
| enum | MousePatternCode { MouseSelect1, MouseSelect2, MouseSelect3, MouseSelect4, MouseSelect5, MouseSelect6, MousePatternCount } |
| Symbolic mouse input codes. More... | |
| enum | KeyPatternCode { KeySelect1, KeySelect2, KeyAbort, KeyLeft, KeyRight, KeyUp, KeyDown, KeyRedo, KeyUndo, KeyHome, KeyPatternCount } |
| Symbolic keyboard input codes. More... | |
Public Slots inherited from QwtPicker | |
| void | setEnabled (bool) |
| En/disable the picker. More... | |
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.
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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.
| canvas | Plot canvas to observe, also the parent object |
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explicit |
Create a plot picker
| 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 |
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explicit |
Create a plot picker
| 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 |
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protectedvirtual |
Append a point to the selection and update rubber band and tracker.
| pos | Additional point |
Reimplemented from QwtPicker.
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signal |
| QWidget * QwtPlotPicker::canvas | ( | ) |
| const QWidget * QwtPlotPicker::canvas | ( | ) | const |
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protectedvirtual |
Close a selection setting the state to inactive.
| ok | If true, complete the selection and emit selected signals otherwise discard the selection. |
Reimplemented from QwtPicker.
Reimplemented in QwtPlotZoomer.
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protected |
Translate a rectangle from pixel into plot coordinates
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protected |
Translate a point from pixel into plot coordinates
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protectedvirtual |
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signal |
A signal emitted whenever the last appended point of the selection has been moved.
| pos | Position of the moved last point of the selection. |
| QwtPlot * QwtPlotPicker::plot | ( | ) |
| const QwtPlot * QwtPlotPicker::plot | ( | ) | const |
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protected |
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signal |
A signal emitted in case of QwtPickerMachine::PointSelection.
| pos | Selected point |
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signal |
A signal emitted in case of QwtPickerMachine::RectSelection.
| rect | Selected rectangle |
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signal |
A signal emitting the selected points, at the end of a selection.
| pa | Selected points |
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virtual |
Set the x and y axes of the picker
| xAxis | X axis |
| yAxis | Y axis |
Reimplemented in QwtPlotZoomer.
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protectedvirtual |
Translate a pixel position into a position string
| pos | Position in pixel coordinates |
Reimplemented from QwtPicker.
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protectedvirtual |
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".
| pos | Position |
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protected |
Translate a rectangle from plot into pixel coordinates
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protected |
Translate a point from plot into pixel coordinates