conflicting packages
| QwtPlotZoomer(3) | Qwt User's Guide | QwtPlotZoomer(3) |
NAME¶
QwtPlotZoomer - QwtPlotZoomer provides stacked zooming for a plot widget.SYNOPSIS¶
#include <qwt_plot_zoomer.h> Inherits QwtPlotPicker.Public Types¶
enum DisplayMode { AlwaysOff, AlwaysOn, ActiveOnly }
Public Slots¶
virtual void move (double x, double y)
Signals¶
void appended (const QwtDoublePoint &pos)
Public Member Functions¶
QwtPlotCanvas * canvas ()
Protected Member Functions¶
virtual bool accept (QwtPolygon &) const
Detailed Description¶
QwtPlotZoomer provides stacked zooming for a plot widget.The realtime example includes an derived
zoomer class that adds scrollbars to the plot canvas.
Member Enumeration Documentation¶
enum QwtPicker::DisplayMode [inherited] .IP • 2¶
AlwaysOffDisplay never.
- •
- AlwaysOn
Display always.
- •
- ActiveOnly
Display only when the selection is active.
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
- •
- 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
- •
- 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
initMousePattern()
enum QwtPicker::RectSelectionType [inherited]¶
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.
QwtPicker::setSelectionFlags(),
QwtPicker::selectionFlags()
enum QwtPicker::ResizeMode [inherited] 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.
QwtPicker::setResizeMode(),
QwtPicker::resize()
enum QwtPicker::RubberBand [inherited] 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.
QwtPicker::setRubberBand(),
QwtPicker::rubberBand()
enum QwtPicker::SelectionMode [inherited] 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 [inherited] 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.
QwtPicker::setSelectionFlags(),
QwtPicker::selectionFlags()
Constructor & Destructor Documentation¶
QwtPlotZoomer::QwtPlotZoomer (QwtPlotCanvas *canvas, booldoReplot = true) [explicit]¶
Create a zoomer for a plot canvas. The zoomer is set to those x- and y-axis of the parent plot of the canvas 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. The selectionFlags() are set to QwtPicker::RectSelection | QwtPicker::ClickSelection, the tracker mode to QwtPicker::ActiveOnly. Parameters:canvas Plot canvas to observe, also the
parent object
doReplot Call replot for the attached plot before initializing the zoomer
with its scales. This might be necessary, when the plot is in a state with
pending scale changes.
See also:
QwtPlot::autoReplot(),
QwtPlot::replot(), setZoomBase()
QwtPlotZoomer::QwtPlotZoomer (intxAxis, intyAxis, QwtPlotCanvas *canvas, booldoReplot = true) [explicit]¶
Create a zoomer for a plot canvas. The selectionFlags() are set to QwtPicker::RectSelection | QwtPicker::ClickSelection, the tracker mode to QwtPicker::ActiveOnly. Parameters:xAxis X axis of the zoomer
yAxis Y axis of the zoomer
canvas Plot canvas to observe, also the parent object
doReplot Call replot for the attached plot before initializing the zoomer
with its scales. This might be necessary, when the plot is in a state with
pending scale changes.
See also:
QwtPlot::autoReplot(),
QwtPlot::replot(), setZoomBase()
QwtPlotZoomer::QwtPlotZoomer (intxAxis, intyAxis, intselectionFlags, DisplayModetrackerMode, QwtPlotCanvas *canvas, booldoReplot = true) [explicit] Create a zoomer for a plot canvas.¶
Parameters:xAxis X axis of the zoomer
yAxis Y axis of the zoomer
selectionFlags Or'd value of QwtPicker::RectSelectionType and
QwtPicker::SelectionMode. QwtPicker::RectSelection will be auto added.
trackerMode Tracker mode
canvas Plot canvas to observe, also the parent object
doReplot Call replot for the attached plot before initializing the zoomer
with its scales. This might be necessary, when the plot is in a state with
pending scale changes.
See also:
QwtPicker,
QwtPicker::setSelectionFlags(), QwtPicker::setRubberBand(),
QwtPicker::setTrackerMode()
QwtPlot::autoReplot(), QwtPlot::replot(),
setZoomBase()
Member Function Documentation¶
bool QwtPlotZoomer::accept (QwtPolygon &pa) const [protected, virtual]¶
Check and correct a selected rectangle. Reject rectangles with a hight or width < 2, otherwise expand the selected rectangle to a minimum size of 11x11 and accept it. Returns:true If rect is accepted, or has been changed
to a accepted rectangle.
void QwtPlotPicker::append (const QPoint &pos) [protected, virtual, inherited] Append a point to the selection and update rubberband and tracker.¶
Parameters:pos Additional point
See also:
isActive, begin(), end(),
move(), appended()
Note:
The appended(const QPoint &),
appended(const QDoublePoint &) signals are emitted.
void QwtPicker::appended (const QPoint &pos) [signal, inherited] A signal emitted when a point has been appended to the selection¶
Parameters:pos Position of the appended
point.
See also:
append(). moved()
void QwtPlotPicker::appended (const QwtDoublePoint &pos) [signal, inherited] A signal emitted when a point has been appended to the selection¶
Parameters:pos Position of the appended
point.
See also:
append(). moved()
void QwtPlotZoomer::begin () [protected, virtual] Rejects selections, when the stack depth is too deep, or the zoomed rectangle is minZoomSize().¶
See also:minZoomSize(),
maxStackDepth()
QwtPlotCanvas * QwtPlotPicker::canvas () [inherited]¶
Return observed plot canvas.const QwtPlotCanvas * QwtPlotPicker::canvas () const [inherited]¶
Return Observed plot canvas.void QwtPicker::changed (const QwtPolygon &pa) [signal, inherited] 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, inherited] 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, inherited] Draw the tracker¶
Parameters:painter Painter
See also:
trackerRect(),
trackerText()
bool QwtPlotZoomer::end (boolok = true) [protected, virtual] Expand the selected rectangle to minZoomSize() and zoom in if accepted.¶
See also:accept(), minZoomSize()
bool QwtPicker::eventFilter (QObject *o, QEvent *e) [virtual, inherited]¶
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
void QwtEventPattern::initMousePattern (intnumButtons) [inherited] Set default mouse patterns, depending on the number of mouse buttons¶
Parameters:numButtons Number of mouse buttons (
<= 3 )
See also:
MousePatternCode
QwtDoubleRect QwtPlotPicker::invTransform (const QRect &rect) const [protected, inherited] Translate a rectangle from pixel into plot coordinates¶
Returns:Rectangle in plot coordinates
See also:
QwtPlotPicker::transform()
QwtDoublePoint QwtPlotPicker::invTransform (const QPoint &pos) const [protected, inherited] Translate a point from pixel into plot coordinates¶
Returns:Point in plot coordinates
See also:
QwtPlotPicker::transform()
bool QwtPicker::isActive () const [inherited] A picker is active between begin() and end().¶
Returns:true if the selection is active.
bool QwtPicker::isEnabled () const [inherited] 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.int QwtPlotZoomer::maxStackDepth () const Returns:¶
Maximal depth of the zoom stack.
See also:
setMaxStackDepth()
QwtDoubleSize QwtPlotZoomer::minZoomSize () const [protected, virtual]¶
Limit zooming by a minimum rectangle. Returns:zoomBase().width() / 10e4,
zoomBase().height() / 10e4
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()
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()
QwtArray< QwtEventPattern::MousePattern > & QwtEventPattern::mousePattern () [inherited]¶
Return ,ouse patterns.const QwtArray< QwtEventPattern::MousePattern > & QwtEventPattern::mousePattern () const [inherited]¶
Return mouse patterns.void QwtPlotPicker::move (const QPoint &pos) [protected, virtual, inherited] 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.
void QwtPlotZoomer::move (doublex, doubley) [virtual, slot] Move the the current zoom rectangle.¶
Parameters:x X value
y Y value
See also:
QwtDoubleRect::move()
Note:
The changed rectangle is limited by the zoom
base
void QwtPlotZoomer::moveBy (doubledx, doubledy) [slot] Move the current zoom rectangle.¶
Parameters:dx X offset
dy Y offset
Note:
The changed rectangle is limited by the zoom
base
void QwtPicker::moved (const QPoint &pos) [signal, inherited] 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()
void QwtPlotPicker::moved (const QwtDoublePoint &pos) [signal, inherited] 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 () [inherited]¶
Return the parent widget, where the selection happens.const QWidget * QwtPicker::parentWidget () const [inherited]¶
Return the parent widget, where the selection happens.QRect QwtPicker::pickRect () const [virtual, inherited] Find the area of the observed widget, where selection might happen.¶
Returns:QFrame::contentsRect() if it is a QFrame,
QWidget::rect() otherwise.
QwtPlot * QwtPlotPicker::plot () [inherited]¶
Return plot widget, containing the observed plot canvas.const QwtPlot * QwtPlotPicker::plot () const [inherited]¶
Return plot widget, containing the observed plot canvas.void QwtPlotZoomer::rescale () [protected, virtual] Adjust the observed plot to zoomRect()¶
Note:Initiates QwtPlot::replot
void QwtPicker::reset () [protected, virtual, inherited] Reset the state machine and terminate (end(false)) the selection¶
QwtPicker::ResizeMode QwtPicker::resizeMode () const [inherited] Returns:¶
Resize mode
See also:
setResizeMode(),
ResizeMode
QwtPicker::RubberBand QwtPicker::rubberBand () const [inherited] Returns:¶
Rubberband style
See also:
setRubberBand(), RubberBand,
rubberBandPen()
QPen QwtPicker::rubberBandPen () const [inherited] Returns:¶
Rubberband pen
See also:
setRubberBandPen(),
rubberBand()
const QWidget * QwtPicker::rubberBandWidget () const [protected, inherited] Returns:¶
Widget displaying the rubberband
QwtDoubleRect QwtPlotPicker::scaleRect () const [protected, inherited] Return normalized bounding rect of the axes¶
See also:QwtPlot::autoReplot(),
QwtPlot::replot().
void QwtPicker::selected (const QwtPolygon &pa) [signal, inherited] A signal emitting the selected points, at the end of a selection.¶
Parameters:pa Selected points
void QwtPlotPicker::selected (const QwtArray< QwtDoublePoint > &pa) [signal, inherited] A signal emitting the selected points, at the end of a selection.¶
Parameters:pa Selected points
void QwtPlotPicker::selected (const QwtDoublePoint &pos) [signal, inherited] A signal emitted in case of selectionFlags() & PointSelection.¶
Parameters:pos Selected point
void QwtPlotPicker::selected (const QwtDoubleRect &rect) [signal, inherited] A signal emitted in case of selectionFlags() & RectSelection.¶
Parameters:rect Selected rectangle
const QwtPolygon & QwtPicker::selection () const [inherited]¶
Return Selected points.int QwtPicker::selectionFlags () const [inherited] Returns:¶
Selection flags, an Or'd value of
SelectionType, RectSelectionType and SelectionMode.
See also:
setSelectionFlags(),
SelectionType, RectSelectionType, SelectionMode
void QwtPlotZoomer::setAxis (intxAxis, intyAxis) [virtual] Reinitialize the axes, and set the zoom base to their scales.¶
Parameters:xAxis X axis
yAxis Y axis
void QwtPicker::setEnabled (boolenabled) [virtual, inherited]¶
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 QwtPlotZoomer::setMaxStackDepth (intdepth)¶
Limit the number of recursive zoom operations to depth. A value of -1 set the depth to unlimited, 0 disables zooming. If the current zoom rectangle is below depth, the plot is unzoomed. Parameters:depth Maximum for the stack depth
See also:
maxStackDepth()
Note:
depth doesn't include the zoom base, so
zoomStack().count() might be maxStackDepth() + 1.
void QwtEventPattern::setMousePattern (const QwtArray< MousePattern > &pattern) [inherited]¶
Change the mouse event patterns.void QwtEventPattern::setMousePattern (uintpattern, intbutton, intstate = Qt::NoButton) [inherited] Change one mouse pattern¶
Parameters:pattern Index of the pattern
button Button
state State
See also:
QMouseEvent
void QwtPicker::setResizeMode (ResizeModemode) [virtual, inherited]¶
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, inherited] 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, inherited] Set the pen for the rubberband¶
Parameters:pen Rubberband pen
See also:
rubberBandPen(),
setRubberBand()
void QwtPlotZoomer::setSelectionFlags (intflags) [virtual] Set the selection flags¶
Parameters:flags Or'd value of
QwtPicker::RectSelectionType and QwtPicker::SelectionMode. The
default value is QwtPicker::RectSelection &
QwtPicker::ClickSelection.
See also:
selectionFlags(), SelectionType,
RectSelectionType, SelectionMode
Note:
QwtPicker::RectSelection will be auto
added.
void QwtPicker::setTrackerFont (const QFont &font) [virtual, inherited] Set the font for the tracker¶
Parameters:font Tracker font
See also:
trackerFont(), setTrackerMode(),
setTrackerPen()
void QwtPicker::setTrackerMode (DisplayModemode) [virtual, inherited]¶
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, inherited] Set the pen for the tracker¶
Parameters:pen Tracker pen
See also:
trackerPen(), setTrackerMode(),
setTrackerFont()
void QwtPlotZoomer::setZoomBase (booldoReplot = true) [virtual] Reinitialized the zoom stack with scaleRect() as base.¶
Parameters:doReplot Call replot for the attached
plot before initializing the zoomer with its scales. This might be necessary,
when the plot is in a state with pending scale changes.
See also:
zoomBase(), scaleRect()
QwtPlot::autoReplot(), QwtPlot::replot().
void QwtPlotZoomer::setZoomBase (const QwtDoubleRect &base) [virtual]¶
Set the initial size of the zoomer. base is united with the current scaleRect() and the zoom stack is reinitalized with it as zoom base. plot is zoomed to scaleRect(). Parameters:base Zoom base
See also:
zoomBase(), scaleRect()
void QwtPlotZoomer::setZoomStack (const QStack< QwtDoubleRect > &, intzoomRectIndex = -1)¶
Assign a zoom stack. In combination with other types of navigation it might be useful to modify to manipulate the complete zoom stack. Parameters:zoomStack New zoom stack
zoomRectIndex Index of the current position of zoom stack. In case of -1
the current position is at the top of the stack.
Note:
The zoomed signal might be emitted.
See also:
zoomStack(),
zoomRectIndex()
QwtPickerMachine * QwtPicker::stateMachine (intflags) const [protected, virtual, inherited] Create a state machine depending on the selection flags.¶
- •
- PointSelection | ClickSelection
QwtPickerClickPointMachine()
- •
- PointSelection | DragSelection
QwtPickerDragPointMachine()
- •
- RectSelection | ClickSelection
QwtPickerClickRectMachine()
- •
- RectSelection | DragSelection
QwtPickerDragRectMachine()
- •
- PolygonSelection
QwtPickerPolygonMachine()
setSelectionFlags()
void QwtPicker::stretchSelection (const QSize &oldSize, const QSize &newSize) [protected, virtual, inherited] 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 [inherited] Returns:¶
Tracker font
See also:
setTrackerFont(), trackerMode(),
trackerPen()
QwtPicker::DisplayMode QwtPicker::trackerMode () const [inherited] Returns:¶
Tracker display mode
See also:
setTrackerMode(),
DisplayMode
QPen QwtPicker::trackerPen () const [inherited] Returns:¶
Tracker pen
See also:
setTrackerPen(), trackerMode(),
trackerFont()
QPoint QwtPicker::trackerPosition () const [inherited] Returns:¶
Current position of the tracker
QRect QwtPicker::trackerRect (const QFont &font) const [inherited] 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 QwtPlotPicker::trackerText (const QwtDoublePoint &pos) const [protected, virtual, inherited]¶
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
QwtText QwtPlotPicker::trackerText (const QPoint &pos) const [protected, virtual, inherited] Translate a pixel position into a position string¶
Parameters:pos Position in pixel coordinates
Returns:
Position string
const QWidget * QwtPicker::trackerWidget () const [protected, inherited] Returns:¶
Widget displaying the tracker text
QPoint QwtPlotPicker::transform (const QwtDoublePoint &pos) const [protected, inherited] Translate a point from plot into pixel coordinates¶
Returns:Point in pixel coordinates
See also:
QwtPlotPicker::invTransform()
QRect QwtPlotPicker::transform (const QwtDoubleRect &rect) const [protected, inherited] Translate a rectangle from plot into pixel coordinates¶
Returns:Rectangle in pixel coordinates
See also:
QwtPlotPicker::invTransform()
void QwtPicker::transition (const QEvent *e) [protected, virtual, inherited] 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, inherited]¶
Update the state of rubberband and tracker label.void QwtPlotZoomer::widgetKeyPressEvent (QKeyEvent *ke) [protected, virtual] Qt::Key_Plus zooms in, Qt::Key_Minus zooms out one position on the zoom stack, Qt::Key_Escape zooms out to the zoom base.¶
Changes the current position on the stack, but doesn't pop any rectangle. Note:The keys codes can be changed, using
QwtEventPattern::setKeyPattern: 3, 4, 5
void QwtPicker::widgetKeyReleaseEvent (QKeyEvent *ke) [protected, virtual, inherited] 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, inherited] Handle a leave event for the observed widget.¶
See also:eventFilter(),
widgetMousePressEvent(), widgetMouseReleaseEvent(),
widgetMouseDoubleClickEvent(), widgetWheelEvent(),
widgetKeyPressEvent(), widgetKeyReleaseEvent()
void QwtPicker::widgetMouseDoubleClickEvent (QMouseEvent *me) [protected, virtual, inherited] 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, inherited] 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, inherited] 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 QwtPlotZoomer::widgetMouseReleaseEvent (QMouseEvent *me) [protected, virtual] Qt::MidButton zooms out one position on the zoom stack, Qt::RightButton to the zoom base.¶
Changes the current position on the stack, but doesn't pop any rectangle. Note:The mouse events can be changed, using
QwtEventPattern::setMousePattern: 2, 1
void QwtPicker::widgetWheelEvent (QWheelEvent *e) [protected, virtual, inherited] 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()
int QwtPlotPicker::xAxis () const [inherited]¶
Return x axis.int QwtPlotPicker::yAxis () const [inherited]¶
Return y axis.void QwtPlotZoomer::zoom (intoffset) [virtual, slot]¶
Zoom in or out. Activate a rectangle on the zoom stack with an offset relative to the current position. Negative values of offest will zoom out, positive zoom in. A value of 0 zooms out to the zoom base. Parameters:offset Offset relative to the current
position of the zoom stack.
Note:
The zoomed signal is emitted.
See also:
zoomRectIndex()
void QwtPlotZoomer::zoom (const QwtDoubleRect &rect) [virtual, slot]¶
Zoom in. Clears all rectangles above the current position of the zoom stack and pushs the intersection of zoomRect() and the normalized rect on it. Note:If the maximal stack depth is reached, zoom is
ignored.
The zoomed signal is emitted.
QwtDoubleRect QwtPlotZoomer::zoomBase () const Returns:¶
Initial rectangle of the zoomer
See also:
setZoomBase(), zoomRect()
void QwtPlotZoomer::zoomed (const QwtDoubleRect &rect) [signal] A signal emitting the zoomRect(), when the plot has been zoomed in or out.¶
Parameters:rect Current zoom rectangle.
QwtDoubleRect QwtPlotZoomer::zoomRect () const Rectangle at the current position on the zoom stack.¶
See also:zoomRectIndex(),
scaleRect().
uint QwtPlotZoomer::zoomRectIndex () const Returns:¶
Index of current position of zoom stack.
const QwtZoomStack & QwtPlotZoomer::zoomStack () const Return the zoom stack. zoomStack()[0] is the zoom base, zoomStack()[1] the first zoomed rectangle.¶
See also:setZoomStack(),
zoomRectIndex()
Author¶
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