QwtPicker Class Reference

Inheritance diagram for QwtPicker:

[legend]Collaboration diagram for QwtPicker:

[legend]List of all members.

---

Detailed Description

QwtPicker provides selections on a widget.

QwtPicker filters all mouse and keyboard events of a widget and translates them into an array of selected points. Depending on the QwtPicker::SelectionType the selection might be a single point, a rectangle or a polygon. The selection process is supported by optional rubberbands (rubberband selection) and position trackers.

QwtPicker is useful for widgets where the event handlers can´t be overloaded, like for components of composite widgets. It offers alternative handlers for mouse and key events.

Example

#include <qwt_picker.h>

QwtPicker *picker = new QwtPicker(widget);
picker->setTrackerMode(QwtPicker::ActiveOnly);
connect(picker, SIGNAL(selected(const QwtPolygon &)), ...);

// emit the position of clicks on widget
picker->setSelectionFlags(QwtPicker::PointSelection | QwtPicker::ClickSelection);

    ...
    
// now select rectangles
picker->setSelectionFlags(QwtPicker::RectSelection | QwtPicker::DragSelection);
picker->setRubberBand(QwtPicker::RectRubberBand); 

The selection process uses the commands begin(), append(), move() and end(). append() adds a new point to the selection, move() changes the position of the latest point.

The commands are initiated from a small state machine (QwtPickerMachine) that translates mouse and key events. There are a couple of predefined state machines for point, rect and polygon selections. The selectionFlags() control which one should be used. It is possible to use other machines by overloading stateMachine().

The picker is active (isActive()), between begin() and end(). In active state the rubberband is displayed, and the tracker is visible in case of trackerMode is ActiveOnly or AlwaysOn.

The cursor can be moved using the arrow keys. All selections can be aborted using the abort key. (QwtEventPattern::KeyPatternCode)

Warning:

In case of QWidget::NoFocus the focus policy of the observed widget is set to QWidget::WheelFocus and mouse tracking will be manipulated for ClickSelection while the picker is active, or if trackerMode() is AlwayOn.

Definition at line 80 of file qwt_picker.h.

Public Types
enum	SelectionType {   NoSelection = 0,   PointSelection = 1,   RectSelection = 2,   PolygonSelection = 4 }
enum	RectSelectionType {   CornerToCorner = 64,   CenterToCorner = 128,   CenterToRadius = 256 }
enum	SelectionMode {   ClickSelection = 1024,   DragSelection = 2048 }
enum	RubberBand {   NoRubberBand = 0,   HLineRubberBand,   VLineRubberBand,   CrossRubberBand,   RectRubberBand,   EllipseRubberBand,   PolygonRubberBand,   UserRubberBand = 100 }
enum	DisplayMode {   AlwaysOff,   AlwaysOn,   ActiveOnly }
enum	ResizeMode {   Stretch,   KeepSize }
Signals
void	selected (const QwtPolygon &pa)
void	appended (const QPoint &pos)
void	moved (const QPoint &pos)
void	changed (const QwtPolygon &pa)
Public Member Functions
	QwtPicker (QWidget *parent)
	QwtPicker (int selectionFlags, RubberBand rubberBand, DisplayMode trackerMode, QWidget *)
virtual	~QwtPicker ()
virtual void	setSelectionFlags (int)
int	selectionFlags () const
virtual void	setRubberBand (RubberBand)
RubberBand	rubberBand () const
virtual void	setTrackerMode (DisplayMode)
DisplayMode	trackerMode () const
virtual void	setResizeMode (ResizeMode)
ResizeMode	resizeMode () const
virtual void	setRubberBandPen (const QPen &)
QPen	rubberBandPen () const
virtual void	setTrackerPen (const QPen &)
QPen	trackerPen () const
virtual void	setTrackerFont (const QFont &)
QFont	trackerFont () const
bool	isEnabled () const
virtual void	setEnabled (bool)
bool	isActive () const
virtual bool	eventFilter (QObject *, QEvent *)
QWidget *	parentWidget ()
const QWidget *	parentWidget () const
virtual QRect	pickRect () const
const QwtPolygon &	selection () const
virtual void	drawRubberBand (QPainter *) const
virtual void	drawTracker (QPainter *) const
Protected Member Functions
virtual bool	accept (QwtPolygon &selection) const
virtual void	transition (const QEvent *)
virtual void	begin ()
virtual void	append (const QPoint &)
virtual void	move (const QPoint &)
virtual bool	end (bool ok=true)
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	widgetLeaveEvent (QEvent *)
QRect	trackerRect (QPainter *painter) const
virtual void	stretchSelection (const QSize &oldSize, const QSize &newSize)
virtual QwtText	trackerText (const QPoint &pos) const
virtual QwtPickerMachine *	stateMachine (int) const
virtual void	updateDisplay ()
const QWidget *	rubberBandWidget () const
const QWidget *	trackerWidget () const

---

Member Enumeration Documentation

enum QwtPicker::DisplayMode

AlwaysOff Display never. AlwaysOn Display always. ActiveOnly Display only when the selection is active. See also: QwtPicker::setTrackerMode(), QwtPicker::trackerMode(), QwtPicker::isActive() Definition at line 217 of file qwt_picker.h.

enum QwtPicker::RectSelectionType

Selection subtype for RectSelection This enum type describes the type of rectangle selections. It can be or´d with QwtPicker::RectSelectionType and QwtPicker::SelectionMode and passed to QwtPicker::setSelectionFlags(). CornerToCorner The first and the second selected point are the corners of the rectangle. CenterToCorner The first point is the center, the second a corner of the rectangle. CenterToRadius The first point is the center of a quadrat, calculated by the maximum of the x- and y-distance. The default value is CornerToCorner. See also: QwtPicker::setSelectionFlags(), QwtPicker::selectionFlags() Definition at line 143 of file qwt_picker.h.

enum QwtPicker::ResizeMode

Controls what to do with the selected points of an active selection when the observed widget is resized. Stretch All points are scaled according to the new size, KeepSize All points remain unchanged. The default value is Stretch. See also: QwtPicker::setResizeMode(), QwtPicker::resize() Definition at line 236 of file qwt_picker.h.

enum QwtPicker::RubberBand

Rubberband style NoRubberBand No rubberband. HLineRubberBand & PointSelection A horizontal line. VLineRubberBand & PointSelection A vertical line. CrossRubberBand & PointSelection A horizontal and a vertical line. RectRubberBand & RectSelection A rectangle. EllipseRubberBand & RectSelection An ellipse. PolygonRubberBand &PolygonSelection A polygon. UserRubberBand Values >= UserRubberBand can be used to define additional rubber bands. The default value is NoRubberBand. See also: QwtPicker::setRubberBand(), QwtPicker::rubberBand() Definition at line 187 of file qwt_picker.h.

enum QwtPicker::SelectionMode

Values of this enum type or´d together with a SelectionType value identifies which state machine should be used for the selection. The default value is ClickSelection. See also: stateMachine() Definition at line 157 of file qwt_picker.h.

enum QwtPicker::SelectionType

This enum type describes the type of a selection. It can be or´d with QwtPicker::RectSelectionType and QwtPicker::SelectionMode and passed to QwtPicker::setSelectionFlags() NoSelection Selection is disabled. Note this is different to the disabled state, as you might have a tracker. PointSelection Select a single point. RectSelection Select a rectangle. PolygonSelection Select a polygon. The default value is NoSelection. See also: QwtPicker::setSelectionFlags(), QwtPicker::selectionFlags() Definition at line 117 of file qwt_picker.h.

---

Constructor & Destructor Documentation

QwtPicker::QwtPicker (  QWidget *  parent  )  [explicit]

Constructor Creates an picker that is enabled, but where selection flag is set to NoSelection, rubberband and tracker are disabled. Parameters: parent  Parent widget, that will be observed Definition at line 185 of file qwt_picker.cpp.

QwtPicker::QwtPicker (  int  selectionFlags, RubberBand  rubberBand, DisplayMode  trackerMode, QWidget *  parent )  [explicit]

Constructor Parameters: selectionFlags  Or'd value of SelectionType, RectSelectionType and SelectionMode rubberBand  Rubberband style trackerMode  Tracker mode parent  Parent widget, that will be observed Definition at line 200 of file qwt_picker.cpp.

QwtPicker::~QwtPicker (   )  [virtual]

Destructor. Definition at line 208 of file qwt_picker.cpp.

---

Member Function Documentation

bool QwtPicker::accept (  QwtPolygon &  selection  )  const [protected, virtual]

Validate and fixup the selection. Accepts all selections unmodified Parameters: selection  Selection to validate and fixup Returns: true, when accepted, false otherwise Reimplemented in QwtPlotZoomer. Definition at line 1184 of file qwt_picker.cpp. Referenced by end().

void QwtPicker::append (  const QPoint &  pos  )  [protected, virtual]

Append a point to the selection and update rubberband and tracker. The appended() signal is emitted. Parameters: pos  Additional point See also: isActive, begin(), end(), move(), appended() Reimplemented in QwtPlotPicker. Definition at line 1143 of file qwt_picker.cpp. References appended(), and updateDisplay(). Referenced by QwtPlotPicker::append().

void QwtPicker::appended (  const QPoint &  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().

void QwtPicker::begin (   )  [protected, virtual]

Open a selection setting the state to active See also: isActive, end(), append(), move() Reimplemented in QwtPlotZoomer. Definition at line 1076 of file qwt_picker.cpp. References parentWidget(), and trackerMode().

void QwtPicker::changed (  const QwtPolygon &  pa  )  [signal]

A signal emitted when the active selection has been changed. This might happen when the observed widget is resized. Parameters: pa  Changed selection See also: stretchSelection() Referenced by stretchSelection().

void QwtPicker::drawRubberBand (  QPainter *  painter  )  const [virtual]

Draw a rubberband , depending on rubberBand() and selectionFlags() Parameters: painter  Painter, initialized with clip rect See also: rubberBand(), RubberBand, selectionFlags() Definition at line 591 of file qwt_picker.cpp. References QwtPainter::drawEllipse(), QwtPainter::drawLine(), QwtPainter::drawRect(), isActive(), pickRect(), rubberBand(), rubberBandPen(), and selectionFlags().

void QwtPicker::drawTracker (  QPainter *  painter  )  const [virtual]

Draw the tracker Parameters: painter  Painter See also: trackerRect(), trackerText() Definition at line 686 of file qwt_picker.cpp. References trackerRect(), trackerText(), and QwtText::usedFont().

bool QwtPicker::end (  bool  ok = true  )  [protected, virtual]

Close a selection setting the state to inactive. The selection is validated and maybe fixed by QwtPicker::accept(). Parameters: ok  If true, complete the selection and emit a selected signal otherwise discard the selection. Returns: true if the selection is accepted, false otherwise See also: isActive, begin(), append(), move(), selected(), accept() Reimplemented in QwtPlotPicker, and QwtPlotZoomer. Definition at line 1108 of file qwt_picker.cpp. References accept(), selected(), trackerMode(), and updateDisplay(). Referenced by QwtPlotPicker::end(), and widgetKeyPressEvent().

bool QwtPicker::eventFilter (  QObject *  o, QEvent *  e )  [virtual]

Event filter. When isEnabled() == true all events of the observed widget are filtered. Mouse and keyboard events are translated into widgetMouse- and widgetKey- and widgetWheel-events. Paint and Resize events are handled to keep rubberband and tracker up to date. See also: event(), widgetMousePressEvent(), widgetMouseReleaseEvent(), widgetMouseDoubleClickEvent(), widgetMouseMoveEvent(), widgetWheelEvent(), widgetKeyPressEvent(), widgetKeyReleaseEvent() Definition at line 788 of file qwt_picker.cpp. References parentWidget(), stretchSelection(), widgetKeyPressEvent(), widgetKeyReleaseEvent(), widgetLeaveEvent(), widgetMouseDoubleClickEvent(), widgetMouseMoveEvent(), widgetMousePressEvent(), widgetMouseReleaseEvent(), and widgetWheelEvent().

bool QwtPicker::isActive (   )  const

A picker is active between begin() and end(). Returns: true if the selection is active. Definition at line 1193 of file qwt_picker.cpp. Referenced by drawRubberBand(), trackerRect(), updateDisplay(), QwtPlotZoomer::widgetKeyPressEvent(), widgetKeyPressEvent(), widgetLeaveEvent(), and widgetMouseMoveEvent().

bool QwtPicker::isEnabled (   )  const

Returns: true when enabled, false otherwise See also: setEnabled, eventFilter() Definition at line 474 of file qwt_picker.cpp.

void QwtPicker::move (  const QPoint &  pos  )  [protected, virtual]

Move the last point of the selection The moved() signal is emitted. Parameters: pos  New position See also: isActive, begin(), end(), append() Reimplemented in QwtPlotPicker. Definition at line 1165 of file qwt_picker.cpp. References moved(), and updateDisplay(). Referenced by QwtPlotPicker::move().

void QwtPicker::moved (  const QPoint &  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 QWidget * QwtPicker::parentWidget (   )  const

Return the parent widget, where the selection happens. Definition at line 322 of file qwt_picker.cpp.

QWidget * QwtPicker::parentWidget (   )

Return the parent widget, where the selection happens. Definition at line 312 of file qwt_picker.cpp. Referenced by begin(), QwtPlotPicker::canvas(), eventFilter(), pickRect(), setEnabled(), updateDisplay(), and widgetKeyPressEvent().

QRect QwtPicker::pickRect (   )  const [virtual]

Find the area of the observed widget, where selection might happen. Returns: QFrame::contentsRect() if it is a QFrame, QWidget::rect() otherwise. Definition at line 1265 of file qwt_picker.cpp. References parentWidget(). Referenced by drawRubberBand(), widgetKeyPressEvent(), widgetMouseMoveEvent(), and widgetWheelEvent().

QwtPicker::ResizeMode QwtPicker::resizeMode (   )  const

Returns: Resize mode See also: setResizeMode(), ResizeMode Definition at line 436 of file qwt_picker.cpp.

QwtPicker::RubberBand QwtPicker::rubberBand (   )  const

Returns: Rubberband style See also: setRubberBand(), RubberBand, rubberBandPen() Definition at line 373 of file qwt_picker.cpp. Referenced by drawRubberBand(), trackerRect(), QwtPlotPicker::trackerText(), trackerText(), and updateDisplay().

QPen QwtPicker::rubberBandPen (   )  const

Returns: Rubberband pen See also: setRubberBandPen(), rubberBand() Definition at line 547 of file qwt_picker.cpp. Referenced by drawRubberBand(), and updateDisplay().

void QwtPicker::selected (  const QwtPolygon &  pa  )  [signal]

A signal emitting the selected points, at the end of a selection. Parameters: pa  Selected points Referenced by end().

const QwtPolygon & QwtPicker::selection (   )  const

Return Selected points. Definition at line 1199 of file qwt_picker.cpp. Referenced by QwtPlotZoomer::end(), and QwtPlotPicker::end().

int QwtPicker::selectionFlags (   )  const

Returns: Selection flags, an Or'd value of SelectionType, RectSelectionType and SelectionMode. See also: setSelectionFlags(), SelectionType, RectSelectionType, SelectionMode Definition at line 351 of file qwt_picker.cpp. Referenced by drawRubberBand(), and QwtPlotPicker::end().

void QwtPicker::setEnabled (  bool  enabled  )  [virtual]

En/disable the picker. When enabled is true an event filter is installed for the observed widget, otherwise the event filter is removed. Parameters: enabled  true or false See also: isEnabled(), eventFilter() Definition at line 450 of file qwt_picker.cpp. References parentWidget(), and updateDisplay().

void QwtPicker::setResizeMode (  ResizeMode  mode  )  [virtual]

Set the resize mode. The resize mode controls what to do with the selected points of an active selection when the observed widget is resized. Stretch means the points are scaled according to the new size, KeepSize means the points remain unchanged. The default mode is Stretch. Parameters: mode  Resize mode See also: resizeMode(), ResizeMode Definition at line 426 of file qwt_picker.cpp.

void QwtPicker::setRubberBand (  RubberBand  rubberBand  )  [virtual]

Set the rubberband style Parameters: rubberBand  Rubberband style The default value is NoRubberBand. See also: rubberBand(), RubberBand, setRubberBandPen() Definition at line 364 of file qwt_picker.cpp.

void QwtPicker::setRubberBandPen (  const QPen &  pen  )  [virtual]

Set the pen for the rubberband Parameters: pen  Rubberband pen See also: rubberBandPen(), setRubberBand() Definition at line 534 of file qwt_picker.cpp. References updateDisplay().

void QwtPicker::setSelectionFlags (  int  flags  )  [virtual]

Set the selection flags Parameters: flags  Or'd value of SelectionType, RectSelectionType and SelectionMode. The default value is NoSelection. See also: selectionFlags(), SelectionType, RectSelectionType, SelectionMode Reimplemented in QwtPlotZoomer. Definition at line 340 of file qwt_picker.cpp. References stateMachine(). Referenced by QwtPlotZoomer::setSelectionFlags().

void QwtPicker::setTrackerFont (  const QFont &  font  )  [virtual]

Set the font for the tracker Parameters: font  Tracker font See also: trackerFont(), setTrackerMode(), setTrackerPen() Definition at line 485 of file qwt_picker.cpp. References updateDisplay().

void QwtPicker::setTrackerMode (  DisplayMode  mode  )  [virtual]

Set the display mode of the tracker. A tracker displays information about current position of the cursor as a string. The display mode controls if the tracker has to be displayed whenever the observed widget has focus and cursor (AlwaysOn), never (AlwaysOff), or only when the selection is active (ActiveOnly). Parameters: mode  Tracker display mode Warning: In case of AlwaysOn, mouseTracking will be enabled for the observed widget. See also: trackerMode(), DisplayMode Definition at line 394 of file qwt_picker.cpp.

void QwtPicker::setTrackerPen (  const QPen &  pen  )  [virtual]

Set the pen for the tracker Parameters: pen  Tracker pen See also: trackerPen(), setTrackerMode(), setTrackerFont() Definition at line 510 of file qwt_picker.cpp. References updateDisplay().

QwtPickerMachine * QwtPicker::stateMachine (  int  flags  )  const [protected, virtual]

Create a state machine depending on the selection flags. PointSelection | ClickSelection QwtPickerClickPointMachine() PointSelection | DragSelection QwtPickerDragPointMachine() RectSelection | ClickSelection QwtPickerClickRectMachine() RectSelection | DragSelection QwtPickerDragRectMachine() PolygonSelection QwtPickerPolygonMachine() See also: setSelectionFlags() Definition at line 288 of file qwt_picker.cpp. Referenced by setSelectionFlags().

void QwtPicker::stretchSelection (  const QSize &  oldSize, const QSize &  newSize )  [protected, virtual]

Scale the selection by the ratios of oldSize and newSize The changed() signal is emitted. Parameters: oldSize  Previous size newSize  Current size See also: ResizeMode, setResizeMode(), resizeMode() Definition at line 1213 of file qwt_picker.cpp. References changed(). Referenced by eventFilter().

QFont QwtPicker::trackerFont (   )  const

Returns: Tracker font See also: setTrackerFont(), trackerMode(), trackerPen() Definition at line 499 of file qwt_picker.cpp.

QwtPicker::DisplayMode QwtPicker::trackerMode (   )  const

Returns: Tracker display mode See also: setTrackerMode(), DisplayMode Definition at line 407 of file qwt_picker.cpp. Referenced by begin(), end(), trackerRect(), and updateDisplay().

QPen QwtPicker::trackerPen (   )  const

Returns: Tracker pen See also: setTrackerPen(), trackerMode(), trackerFont() Definition at line 523 of file qwt_picker.cpp. Referenced by updateDisplay().

QwtText QwtPicker::trackerText (  const QPoint &  pos  )  const [protected, virtual]

Return the label for a position. 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 string conversion is "%d". Parameters: pos  Position Returns: Converted position as string Reimplemented in QwtPlotPicker. Definition at line 565 of file qwt_picker.cpp. References rubberBand(). Referenced by drawTracker(), and trackerRect().

void QwtPicker::transition (  const QEvent *  e  )  [protected, virtual]

Passes an event to the state machine and executes the resulting commands. Append and Move commands use the current position of the cursor (QCursor::pos()). Parameters: e  Event Definition at line 1019 of file qwt_picker.cpp. Referenced by widgetKeyPressEvent(), widgetKeyReleaseEvent(), widgetMouseDoubleClickEvent(), widgetMouseMoveEvent(), widgetMousePressEvent(), widgetMouseReleaseEvent(), and widgetWheelEvent().

void QwtPicker::widgetKeyPressEvent (  QKeyEvent *  ke  )  [protected, virtual]

Handle a key press event for the observed widget. Selections can be completely done by the keyboard. The arrow keys move the cursor, the abort key aborts a selection. All other keys are handled by the current state machine. See also: QwtPicker, selectionFlags() eventFilter(), widgetMousePressEvent(), widgetMouseReleaseEvent(), widgetMouseDoubleClickEvent(), widgetMouseMoveEvent(), widgetWheelEvent(), widgetKeyReleaseEvent(), stateMachine(), QwtEventPattern::KeyPatternCode Reimplemented in QwtPlotZoomer. Definition at line 953 of file qwt_picker.cpp. References end(), isActive(), QwtEventPattern::keyMatch(), parentWidget(), pickRect(), and transition(). Referenced by eventFilter(), and QwtPlotZoomer::widgetKeyPressEvent().

void QwtPicker::widgetKeyReleaseEvent (  QKeyEvent *  ke  )  [protected, virtual]

Handle a key release event for the observed widget. Passes the event to the state machine. See also: eventFilter(), widgetMousePressEvent(), widgetMouseReleaseEvent(), widgetMouseDoubleClickEvent(), widgetMouseMoveEvent(), widgetWheelEvent(), widgetKeyPressEvent(), stateMachine() Definition at line 1007 of file qwt_picker.cpp. References transition(). Referenced by eventFilter().

void QwtPicker::widgetLeaveEvent (  QEvent *   )  [protected, virtual]

Handle a leave event for the observed widget. See also: eventFilter(), widgetMousePressEvent(), widgetMouseReleaseEvent(), widgetMouseDoubleClickEvent(), widgetWheelEvent(), widgetKeyPressEvent(), widgetKeyReleaseEvent() Definition at line 882 of file qwt_picker.cpp. References isActive(), and updateDisplay(). Referenced by eventFilter().

void QwtPicker::widgetMouseDoubleClickEvent (  QMouseEvent *  me  )  [protected, virtual]

Handle mouse double click event for the observed widget. Empty implementation, does nothing. See also: eventFilter(), widgetMousePressEvent(), widgetMouseReleaseEvent(), widgetMouseMoveEvent(), widgetWheelEvent(), widgetKeyPressEvent(), widgetKeyReleaseEvent() Definition at line 913 of file qwt_picker.cpp. References transition(). Referenced by eventFilter().

void QwtPicker::widgetMouseMoveEvent (  QMouseEvent *  e  )  [protected, virtual]

Handle a mouse move event for the observed widget. Move the last point of the selection in case of isActive() == true See also: eventFilter(), widgetMousePressEvent(), widgetMouseReleaseEvent(), widgetMouseDoubleClickEvent(), widgetWheelEvent(), widgetKeyPressEvent(), widgetKeyReleaseEvent() Definition at line 862 of file qwt_picker.cpp. References isActive(), pickRect(), transition(), and updateDisplay(). Referenced by eventFilter().

void QwtPicker::widgetMousePressEvent (  QMouseEvent *  e  )  [protected, virtual]

Handle a mouse press event for the observed widget. Begin and/or end a selection depending on the selection flags. See also: QwtPicker, selectionFlags() eventFilter(), widgetMouseReleaseEvent(), widgetMouseDoubleClickEvent(), widgetMouseMoveEvent(), widgetWheelEvent(), widgetKeyPressEvent(), widgetKeyReleaseEvent() Definition at line 848 of file qwt_picker.cpp. References transition(). Referenced by eventFilter().

void QwtPicker::widgetMouseReleaseEvent (  QMouseEvent *  e  )  [protected, virtual]

Handle a mouse relase event for the observed widget. End a selection depending on the selection flags. See also: QwtPicker, selectionFlags() eventFilter(), widgetMousePressEvent(), widgetMouseDoubleClickEvent(), widgetMouseMoveEvent(), widgetWheelEvent(), widgetKeyPressEvent(), widgetKeyReleaseEvent() Reimplemented in QwtPlotZoomer. Definition at line 899 of file qwt_picker.cpp. References transition(). Referenced by eventFilter(), and QwtPlotZoomer::widgetMouseReleaseEvent().

void QwtPicker::widgetWheelEvent (  QWheelEvent *  e  )  [protected, virtual]

Handle a wheel event for the observed widget. Move the last point of the selection in case of isActive() == true See also: eventFilter(), widgetMousePressEvent(), widgetMouseReleaseEvent(), widgetMouseDoubleClickEvent(), widgetMouseMoveEvent(), widgetKeyPressEvent(), widgetKeyReleaseEvent() Definition at line 928 of file qwt_picker.cpp. References pickRect(), transition(), and updateDisplay(). Referenced by eventFilter().

---