Rechercher une page de manuel
QwtPicker
Langue: en
Version: 268438 (debian - 07/07/09)
Section: 3 (Bibliothèques de fonctions)
Sommaire
- NAME
- SYNOPSIS
- Detailed Description
- Member Enumeration Documentation
- Constructor & Destructor Documentation
- Member Function Documentation
- void QwtPicker::setSelectionFlags (int flags) [virtual]
- int QwtPicker::selectionFlags () const
- void QwtPicker::setRubberBand (RubberBand rubberBand) [virtual]
- QwtPicker::RubberBand QwtPicker::rubberBand () const
- void QwtPicker::setTrackerMode (DisplayMode mode) [virtual]
- QwtPicker::DisplayMode QwtPicker::trackerMode () const
- void QwtPicker::setResizeMode (ResizeMode mode) [virtual]
- QwtPicker::ResizeMode QwtPicker::resizeMode () const
- void QwtPicker::setRubberBandPen (const QPen & pen) [virtual]
- QPen QwtPicker::rubberBandPen () const
- void QwtPicker::setTrackerPen (const QPen & pen) [virtual]
- QPen QwtPicker::trackerPen () const
- void QwtPicker::setTrackerFont (const QFont & font) [virtual]
- QFont QwtPicker::trackerFont () const
- bool QwtPicker::isEnabled () const
- void QwtPicker::setEnabled (bool enabled) [virtual]
- bool QwtPicker::isActive () const
- bool QwtPicker::eventFilter (QObject * o, QEvent * e) [virtual]
- QWidget * QwtPicker::parentWidget ()
- const QWidget * QwtPicker::parentWidget () const
- QRect QwtPicker::pickRect () const [virtual]
- const QwtPolygon & QwtPicker::selection () const
- void QwtPicker::drawRubberBand (QPainter * painter) const [virtual]
- void QwtPicker::drawTracker (QPainter * painter) const [virtual]
- QwtText QwtPicker::trackerText (const QPoint & pos) const [virtual]
- void QwtPicker::selected (const QwtPolygon & pa) [signal]
- void QwtPicker::appended (const QPoint & pos) [signal]
- void QwtPicker::moved (const QPoint & pos) [signal]
- void QwtPicker::changed (const QwtPolygon & pa) [signal]
- bool QwtPicker::accept (QwtPolygon & selection) const [protected, virtual]
- void QwtPicker::transition (const QEvent * e) [protected, virtual]
- void QwtPicker::begin () [protected, virtual]
- void QwtPicker::append (const QPoint & pos) [protected, virtual]
- void QwtPicker::move (const QPoint & pos) [protected, virtual]
- bool QwtPicker::end (bool ok = true) [protected, virtual]
- void QwtPicker::reset () [protected, virtual]
- void QwtPicker::widgetMousePressEvent (QMouseEvent * e) [protected, virtual]
- void QwtPicker::widgetMouseReleaseEvent (QMouseEvent * e) [protected, virtual]
- void QwtPicker::widgetMouseDoubleClickEvent (QMouseEvent * me) [protected, virtual]
- void QwtPicker::widgetMouseMoveEvent (QMouseEvent * e) [protected, virtual]
- void QwtPicker::widgetWheelEvent (QWheelEvent * e) [protected, virtual]
- void QwtPicker::widgetKeyPressEvent (QKeyEvent * ke) [protected, virtual]
- void QwtPicker::widgetKeyReleaseEvent (QKeyEvent * ke) [protected, virtual]
- void QwtPicker::widgetLeaveEvent (QEvent *) [protected, virtual]
- void QwtPicker::stretchSelection (const QSize & oldSize, const QSize & newSize) [protected, virtual]
- QwtPickerMachine * QwtPicker::stateMachine (int flags) const [protected, virtual]
- Author
NAME
QwtPicker -SYNOPSIS
Inherits QwtEventPattern.
Inherited by QwtPlotPicker.
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 .RS 4
#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, ImageMode = 1, ContourMode = 2 }
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
virtual QwtText trackerText (const QPoint &pos) const
QPoint trackerPosition () const
QRect trackerRect (const QFont &) 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 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 widgetLeaveEvent (QEvent *)
virtual void stretchSelection (const QSize &oldSize, const QSize &newSize)
virtual QwtPickerMachine * stateMachine (int) const
virtual void updateDisplay ()
const QWidget * rubberBandWidget () const
const QWidget * trackerWidget () const
Member Enumeration Documentation
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.
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::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::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::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::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.
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 249 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 264 of file qwt_picker.cpp.
QwtPicker::~QwtPicker () [virtual]
Destructor.
Definition at line 272 of file qwt_picker.cpp.
Member Function Documentation
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 403 of file qwt_picker.cpp.
References stateMachine().
Referenced by QwtPlotZoomer::setSelectionFlags().
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 414 of file qwt_picker.cpp.
Referenced by drawRubberBand(), and QwtPlotPicker::end().
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 427 of file qwt_picker.cpp.
QwtPicker::RubberBand QwtPicker::rubberBand () const
Returns:
- Rubberband style
See also:
- setRubberBand(), RubberBand, rubberBandPen()
Definition at line 436 of file qwt_picker.cpp.
Referenced by drawRubberBand(), trackerRect(), QwtPlotPicker::trackerText(), trackerText(), and 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 457 of file qwt_picker.cpp.
QwtPicker::DisplayMode QwtPicker::trackerMode () const
Returns:
- Tracker display mode
See also:
- setTrackerMode(), DisplayMode
Definition at line 470 of file qwt_picker.cpp.
Referenced by begin(), end(), trackerRect(), 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 489 of file qwt_picker.cpp.
QwtPicker::ResizeMode QwtPicker::resizeMode () const
Returns:
- Resize mode
See also:
- setResizeMode(), ResizeMode
Definition at line 499 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 597 of file qwt_picker.cpp.
References updateDisplay().
QPen QwtPicker::rubberBandPen () const
Returns:
- Rubberband pen
See also:
- setRubberBandPen(), rubberBand()
Definition at line 610 of file qwt_picker.cpp.
Referenced by drawRubberBand(), and updateDisplay().
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 573 of file qwt_picker.cpp.
References updateDisplay().
QPen QwtPicker::trackerPen () const
Returns:
- Tracker pen
See also:
- setTrackerPen(), trackerMode(), trackerFont()
Definition at line 586 of file qwt_picker.cpp.
Referenced by updateDisplay().
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 548 of file qwt_picker.cpp.
References updateDisplay().
QFont QwtPicker::trackerFont () const
Returns:
- Tracker font
See also:
- setTrackerFont(), trackerMode(), trackerPen()
Definition at line 562 of file qwt_picker.cpp.
bool QwtPicker::isEnabled () const
Returns:
- true when enabled, false otherwise
See also:
- setEnabled, eventFilter()
Definition at line 537 of file qwt_picker.cpp.
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 513 of file qwt_picker.cpp.
References parentWidget(), and updateDisplay().
bool QwtPicker::isActive () const
A picker is active between begin() and end().
Returns:
- true if the selection is active.
Definition at line 1265 of file qwt_picker.cpp.
Referenced by drawRubberBand(), reset(), trackerRect(), updateDisplay(), QwtPlotZoomer::widgetKeyPressEvent(), widgetLeaveEvent(), and widgetMouseMoveEvent().
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 852 of file qwt_picker.cpp.
References parentWidget(), stretchSelection(), widgetKeyPressEvent(), widgetKeyReleaseEvent(), widgetLeaveEvent(), widgetMouseDoubleClickEvent(), widgetMouseMoveEvent(), widgetMousePressEvent(), widgetMouseReleaseEvent(), and widgetWheelEvent().
QWidget * QwtPicker::parentWidget ()
Return the parent widget, where the selection happens.
Definition at line 375 of file qwt_picker.cpp.
Referenced by begin(), QwtPlotPicker::canvas(), eventFilter(), pickRect(), setEnabled(), transition(), updateDisplay(), and widgetKeyPressEvent().
const QWidget * QwtPicker::parentWidget () const
Return the parent widget, where the selection happens.
Definition at line 385 of file qwt_picker.cpp.
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 1344 of file qwt_picker.cpp.
References parentWidget().
Referenced by drawRubberBand(), trackerRect(), widgetKeyPressEvent(), widgetMouseMoveEvent(), and widgetWheelEvent().
const QwtPolygon & QwtPicker::selection () const
Return Selected points.
Definition at line 1271 of file qwt_picker.cpp.
Referenced by QwtPlotZoomer::end(), and QwtPlotPicker::end().
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 654 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 749 of file qwt_picker.cpp.
References QwtText::draw(), QwtText::isEmpty(), QwtText::setFont(), trackerRect(), trackerText(), and QwtText::usedFont().
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.
Definition at line 628 of file qwt_picker.cpp.
References rubberBand().
Referenced by drawTracker(), and trackerRect().
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().
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::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().
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().
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 1256 of file qwt_picker.cpp.
Referenced by end().
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 1079 of file qwt_picker.cpp.
References append(), begin(), end(), move(), and parentWidget().
Referenced by widgetKeyPressEvent(), widgetKeyReleaseEvent(), widgetMouseDoubleClickEvent(), widgetMouseMoveEvent(), widgetMousePressEvent(), widgetMouseReleaseEvent(), and widgetWheelEvent().
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 1136 of file qwt_picker.cpp.
References parentWidget(), trackerMode(), and updateDisplay().
Referenced by QwtPlotZoomer::begin(), and transition().
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 1215 of file qwt_picker.cpp.
References appended(), and updateDisplay().
Referenced by QwtPlotPicker::append(), and transition().
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 1237 of file qwt_picker.cpp.
References moved(), and updateDisplay().
Referenced by QwtPlotPicker::move(), and transition().
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 1168 of file qwt_picker.cpp.
References accept(), selected(), trackerMode(), and updateDisplay().
Referenced by QwtPlotPicker::end(), reset(), and transition().
void QwtPicker::reset () [protected, virtual]
Reset the state machine and terminate (end(false)) the selection
Definition at line 1198 of file qwt_picker.cpp.
References end(), and isActive().
Referenced by widgetKeyPressEvent().
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 912 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 963 of file qwt_picker.cpp.
References transition().
Referenced by eventFilter(), and QwtPlotZoomer::widgetMouseReleaseEvent().
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 977 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 926 of file qwt_picker.cpp.
References isActive(), pickRect(), transition(), and updateDisplay().
Referenced by eventFilter().
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 992 of file qwt_picker.cpp.
References pickRect(), transition(), and updateDisplay().
Referenced by eventFilter().
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 1017 of file qwt_picker.cpp.
References QwtEventPattern::keyMatch(), parentWidget(), pickRect(), reset(), 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 1067 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 946 of file qwt_picker.cpp.
References isActive(), and updateDisplay().
Referenced by eventFilter().
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 1285 of file qwt_picker.cpp.
References changed().
Referenced by eventFilter().
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 351 of file qwt_picker.cpp.
Referenced by setSelectionFlags().
Author
Generated automatically by Doxygen for Qwt User's Guide from the source code.
Contenus ©2006-2024 Benjamin Poulain
Design ©2006-2024 Maxime Vantorre