QwtPicker - Man Page
Name
QwtPicker —
QwtPicker provides selections on a widget.
Synopsis
#include <qwt_picker.h>
Inherits QwtEventPattern.
Inherited by QwtPlotPicker.
Public Types
enum DisplayMode { AlwaysOff, AlwaysOn, ActiveOnly }
enum KeyPatternCode { KeySelect1, KeySelect2, KeyAbort, KeyLeft, KeyRight, KeyUp, KeyDown, KeyRedo, KeyUndo, KeyHome, KeyPatternCount }
enum MousePatternCode { MouseSelect1, MouseSelect2, MouseSelect3, MouseSelect4, MouseSelect5, MouseSelect6, MousePatternCount }
enum RectSelectionType { CornerToCorner = 64, CenterToCorner = 128, CenterToRadius = 256 }
enum ResizeMode { Stretch, KeepSize }
enum RubberBand { NoRubberBand = 0, HLineRubberBand, VLineRubberBand, CrossRubberBand, RectRubberBand, EllipseRubberBand, PolygonRubberBand, UserRubberBand = 100 }
enum SelectionMode { ClickSelection = 1024, DragSelection = 2048 }
enum SelectionType { NoSelection = 0, PointSelection = 1, RectSelection = 2, PolygonSelection = 4 }
Signals
void appended (const QPoint &pos)
void changed (const QwtPolygon &pa)
void moved (const QPoint &pos)
void selected (const QwtPolygon &pa)
Public Member Functions
virtual void drawRubberBand (QPainter *) const
virtual void drawTracker (QPainter *) const
virtual bool eventFilter (QObject *, QEvent *)
void initKeyPattern ()
void initMousePattern (int numButtons)
bool isActive () const
bool isEnabled () const
bool keyMatch (uint pattern, const QKeyEvent *) const
const QwtArray< KeyPattern > & keyPattern () const
QwtArray< KeyPattern > & keyPattern ()
bool mouseMatch (uint pattern, const QMouseEvent *) const
const QwtArray< MousePattern > & mousePattern () const
QwtArray< MousePattern > & mousePattern ()
QWidget * parentWidget ()
const QWidget * parentWidget () const
virtual QRect pickRect () const
QwtPicker (int selectionFlags, RubberBand rubberBand, DisplayMode trackerMode, QWidget *)
QwtPicker (QWidget *parent)
ResizeMode resizeMode () const
RubberBand rubberBand () const
QPen rubberBandPen () const
const QwtPolygon & selection () const
int selectionFlags () const
virtual void setEnabled (bool)
void setKeyPattern (uint pattern, int key, int state=Qt::NoButton)
void setKeyPattern (const QwtArray< KeyPattern > &)
void setMousePattern (uint pattern, int button, int state=Qt::NoButton)
void setMousePattern (const QwtArray< MousePattern > &)
virtual void setResizeMode (ResizeMode)
virtual void setRubberBand (RubberBand)
virtual void setRubberBandPen (const QPen &)
virtual void setSelectionFlags (int)
virtual void setTrackerFont (const QFont &)
virtual void setTrackerMode (DisplayMode)
virtual void setTrackerPen (const QPen &)
QFont trackerFont () const
DisplayMode trackerMode () const
QPen trackerPen () const
QPoint trackerPosition () const
QRect trackerRect (const QFont &) const
virtual QwtText trackerText (const QPoint &pos) const
virtual ~QwtPicker ()
Protected Member Functions
virtual bool accept (QwtPolygon &selection) const
virtual void append (const QPoint &)
virtual void begin ()
virtual bool end (bool ok=true)
virtual bool keyMatch (const KeyPattern &, const QKeyEvent *) const
virtual bool mouseMatch (const MousePattern &, const QMouseEvent *) const
virtual void move (const QPoint &)
virtual void reset ()
const QWidget * rubberBandWidget () const
virtual QwtPickerMachine * stateMachine (int) const
virtual void stretchSelection (const QSize &oldSize, const QSize &newSize)
const QWidget * trackerWidget () const
virtual void transition (const QEvent *)
virtual void updateDisplay ()
virtual void widgetKeyPressEvent (QKeyEvent *)
virtual void widgetKeyReleaseEvent (QKeyEvent *)
virtual void widgetLeaveEvent (QEvent *)
virtual void widgetMouseDoubleClickEvent (QMouseEvent *)
virtual void widgetMouseMoveEvent (QMouseEvent *)
virtual void widgetMousePressEvent (QMouseEvent *)
virtual void widgetMouseReleaseEvent (QMouseEvent *)
virtual void widgetWheelEvent (QWheelEvent *)
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.
Member Enumeration Documentation
enum QwtPicker::DisplayMode .IP · 2
AlwaysOff
Display never.
- AlwaysOn
Display always. - ActiveOnly
Display only when the selection is active.
See also:
QwtPicker::setTrackerMode(), QwtPicker::trackerMode(), QwtPicker::isActive()
enum QwtEventPattern::KeyPatternCode [inherited]
Symbolic keyboard input codes. Default initialization:
- KeySelect1
Qt::Key_Return - KeySelect2
Qt::Key_Space - KeyAbort
Qt::Key_Escape - KeyLeft
Qt::Key_Left - KeyRight
Qt::Key_Right - KeyUp
Qt::Key_Up - KeyDown
Qt::Key_Down - KeyUndo
Qt::Key_Minus - KeyRedo
Qt::Key_Plus - KeyHome
Qt::Key_Escape
enum QwtEventPattern::MousePatternCode [inherited]
Symbolic mouse input codes. The default initialization for 3 button mice is:
- MouseSelect1
Qt::LeftButton - MouseSelect2
Qt::RightButton - MouseSelect3
Qt::MidButton - MouseSelect4
Qt::LeftButton + Qt::ShiftButton - MouseSelect5
Qt::RightButton + Qt::ShiftButton - MouseSelect6
Qt::MidButton + Qt::ShiftButton
The default initialization for 2 button mice is:
- MouseSelect1
Qt::LeftButton - MouseSelect2
Qt::RightButton - MouseSelect3
Qt::LeftButton + Qt::AltButton - MouseSelect4
Qt::LeftButton + Qt::ShiftButton - MouseSelect5
Qt::RightButton + Qt::ShiftButton - MouseSelect6
Qt::LeftButton + Qt::AltButton + Qt::ShiftButton
The default initialization for 1 button mice is:
- MouseSelect1
Qt::LeftButton - MouseSelect2
Qt::LeftButton + Qt::ControlButton - MouseSelect3
Qt::LeftButton + Qt::AltButton - MouseSelect4
Qt::LeftButton + Qt::ShiftButton - MouseSelect5
Qt::LeftButton + Qt::ControlButton + Qt::ShiftButton - MouseSelect6
Qt::LeftButton + Qt::AltButton + Qt::ShiftButton
See also:
initMousePattern()
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()
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()
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()
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()
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()
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
QwtPicker::QwtPicker (intselectionFlags, RubberBandrubberBand, DisplayModetrackerMode, 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
QwtPicker::~QwtPicker () [virtual]
Destructor.
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.
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.
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()
void QwtPicker::begin () [protected, virtual] Open a selection setting the state to active
See also:
isActive(), end(), append(), move()
Reimplemented in QwtPlotZoomer.
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()
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()
void QwtPicker::drawTracker (QPainter *painter) const [virtual] Draw the tracker
- Parameters:
painter Painter
- See also:
trackerRect(), trackerText()
bool QwtPicker::end (boolok = 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.
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()
void QwtEventPattern::initKeyPattern () [inherited] Set default mouse patterns.
See also:
KeyPatternCode
bool QwtPicker::isActive () const A picker is active between begin() and end().
- Returns:
true if the selection is active.
bool QwtPicker::isEnabled () const Returns
true when enabled, false otherwise
See also:
setEnabled(), eventFilter()
bool QwtEventPattern::keyMatch (uintpattern, const QKeyEvent *e) const [inherited]
Compare a key event with an event pattern. A key event matches the pattern when both have the same key value and in the state value the same key flags (Qt::KeyButtonMask) are set.
- Parameters:
pattern Index of the event pattern
e Key event- Returns:
true if matches
- See also:
mouseMatch()
bool QwtEventPattern::keyMatch (const KeyPattern &pattern, const QKeyEvent *e) const [protected, virtual, inherited]
Compare a key event with an event pattern. A key event matches the pattern when both have the same key value and in the state value the same key flags (Qt::KeyButtonMask) are set.
- Parameters:
pattern Key event pattern
e Key event- Returns:
true if matches
- See also:
mouseMatch()
const QwtArray< QwtEventPattern::KeyPattern > & QwtEventPattern::keyPattern () const [inherited]
Return key patterns.
QwtArray< QwtEventPattern::KeyPattern > & QwtEventPattern::keyPattern () [inherited]
Return Key patterns.
bool QwtEventPattern::mouseMatch (const MousePattern &pattern, const QMouseEvent *e) const [protected, virtual, inherited]
Compare a mouse event with an event pattern. A mouse event matches the pattern when both have the same button value and in the state value the same key flags(Qt::KeyButtonMask) are set.
- Parameters:
pattern Mouse event pattern
e Mouse event- Returns:
true if matches
- See also:
keyMatch()
bool QwtEventPattern::mouseMatch (uintpattern, const QMouseEvent *e) const [inherited]
Compare a mouse event with an event pattern. A mouse event matches the pattern when both have the same button value and in the state value the same key flags(Qt::KeyButtonMask) are set.
- Parameters:
pattern Index of the event pattern
e Mouse event- Returns:
true if matches
- See also:
keyMatch()
const QwtArray< QwtEventPattern::MousePattern > & QwtEventPattern::mousePattern () const [inherited]
Return mouse patterns.
QwtArray< QwtEventPattern::MousePattern > & QwtEventPattern::mousePattern () [inherited]
Return ,ouse patterns.
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.
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()
QWidget * QwtPicker::parentWidget ()
Return the parent widget, where the selection happens.
const QWidget * QwtPicker::parentWidget () const
Return the parent widget, where the selection happens.
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.
void QwtPicker::reset () [protected, virtual] Reset the state machine and terminate (end(false)) the selection
QwtPicker::ResizeMode QwtPicker::resizeMode () const Returns
Resize mode
See also:
setResizeMode(), ResizeMode
QwtPicker::RubberBand QwtPicker::rubberBand () const Returns
Rubberband style
See also:
setRubberBand(), RubberBand, rubberBandPen()
QPen QwtPicker::rubberBandPen () const Returns
Rubberband pen
See also:
setRubberBandPen(), rubberBand()
const QWidget * QwtPicker::rubberBandWidget () const [protected] Returns
Widget displaying the rubberband
void QwtPicker::selected (const QwtPolygon &pa) [signal] A signal emitting the selected points, at the end of a selection.
- Parameters:
pa Selected points
const QwtPolygon & QwtPicker::selection () const
Return Selected points.
int QwtPicker::selectionFlags () const Returns
Selection flags, an Or'd value of SelectionType, RectSelectionType and SelectionMode.
See also:
setSelectionFlags(), SelectionType, RectSelectionType, SelectionMode
void QwtPicker::setEnabled (boolenabled) [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()
void QwtEventPattern::setKeyPattern (const QwtArray< KeyPattern > &pattern) [inherited]
Change the key event patterns.
void QwtEventPattern::setKeyPattern (uintpattern, intkey, intstate = Qt::NoButton) [inherited] Change one key pattern
- Parameters:
pattern Index of the pattern
key Key
state State- See also:
QKeyEvent
void QwtEventPattern::setMousePattern (const QwtArray< MousePattern > &pattern) [inherited]
Change the mouse event patterns.
void QwtPicker::setResizeMode (ResizeModemode) [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
void QwtPicker::setRubberBand (RubberBandrubberBand) [virtual] Set the rubberband style
- Parameters:
rubberBand Rubberband style The default value is NoRubberBand.
- See also:
rubberBand(), RubberBand, setRubberBandPen()
void QwtPicker::setRubberBandPen (const QPen &pen) [virtual] Set the pen for the rubberband
- Parameters:
pen Rubberband pen
- See also:
rubberBandPen(), setRubberBand()
void QwtPicker::setSelectionFlags (intflags) [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.
void QwtPicker::setTrackerFont (const QFont &font) [virtual] Set the font for the tracker
- Parameters:
font Tracker font
- See also:
trackerFont(), setTrackerMode(), setTrackerPen()
void QwtPicker::setTrackerMode (DisplayModemode) [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
void QwtPicker::setTrackerPen (const QPen &pen) [virtual] Set the pen for the tracker
- Parameters:
pen Tracker pen
- See also:
trackerPen(), setTrackerMode(), setTrackerFont()
QwtPickerMachine * QwtPicker::stateMachine (intflags) 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()
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()
QFont QwtPicker::trackerFont () const Returns
Tracker font
See also:
setTrackerFont(), trackerMode(), trackerPen()
QwtPicker::DisplayMode QwtPicker::trackerMode () const Returns
Tracker display mode
See also:
setTrackerMode(), DisplayMode
QPen QwtPicker::trackerPen () const Returns
Tracker pen
See also:
setTrackerPen(), trackerMode(), trackerFont()
QPoint QwtPicker::trackerPosition () const Returns
Current position of the tracker
QRect QwtPicker::trackerRect (const QFont &font) const Calculate the bounding rectangle for the tracker text from the current position of the tracker
- Parameters:
font Font of the tracker text
- Returns:
Bounding rectangle of the tracker text
- See also:
trackerPosition()
QwtText QwtPicker::trackerText (const QPoint &pos) const [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.
const QWidget * QwtPicker::trackerWidget () const [protected] Returns
Widget displaying the tracker text
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
void QwtPicker::updateDisplay () [protected, virtual]
Update the state of rubberband and tracker label.
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.
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()
void QwtPicker::widgetLeaveEvent (QEvent *) [protected, virtual] Handle a leave event for the observed widget.
See also:
eventFilter(), widgetMousePressEvent(), widgetMouseReleaseEvent(), widgetMouseDoubleClickEvent(), widgetWheelEvent(), widgetKeyPressEvent(), widgetKeyReleaseEvent()
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()
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()
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()
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.
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()
Author
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