QwtSlider Class Reference

Inheritance diagram for QwtSlider:

[legend]Collaboration diagram for QwtSlider:

[legend]List of all members.

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Detailed Description

The Slider Widget.

QwtSlider is a slider widget which operates on an interval of type double. QwtSlider supports different layouts as well as a scale.

See also:

QwtAbstractSlider and QwtAbstractScale for the descriptions of the inherited members.

Definition at line 34 of file qwt_slider.h.

Public Types
enum	ScalePos {   NoScale,   LeftScale,   RightScale,   TopScale,   BottomScale }
enum	BGSTYLE {   BgTrough = 0x1,   BgSlot = 0x2,   BgBoth = BgTrough | BgSlot }
Public Member Functions
	QwtSlider (QWidget *parent, Qt::Orientation=Qt::Horizontal, ScalePos=NoScale, BGSTYLE bgStyle=BgTrough)
virtual	~QwtSlider ()
virtual void	setOrientation (Qt::Orientation)
void	setBgStyle (BGSTYLE)
BGSTYLE	bgStyle () const
void	setScalePosition (ScalePos s)
ScalePos	scalePosition () const
int	thumbLength () const
int	thumbWidth () const
int	borderWidth () const
void	setThumbLength (int l)
void	setThumbWidth (int w)
void	setBorderWidth (int bw)
void	setMargins (int x, int y)
virtual QSize	sizeHint () const
virtual QSize	minimumSizeHint () const
void	setScaleDraw (QwtScaleDraw *)
const QwtScaleDraw *	scaleDraw () const
Protected Member Functions
virtual double	getValue (const QPoint &p)
virtual void	getScrollMode (const QPoint &p, int &scrollMode, int &direction)
void	draw (QPainter *p, const QRect &update_rect)
virtual void	drawSlider (QPainter *p, const QRect &r)
virtual void	drawThumb (QPainter *p, const QRect &, int pos)
virtual void	resizeEvent (QResizeEvent *e)
virtual void	paintEvent (QPaintEvent *e)
virtual void	valueChange ()
virtual void	rangeChange ()
virtual void	scaleChange ()
virtual void	fontChange (const QFont &oldFont)
void	layoutSlider (bool update=true)
int	xyPosition (double v) const
QwtScaleDraw *	scaleDraw ()

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Member Enumeration Documentation

enum QwtSlider::BGSTYLE

Background style. See also: QwtSlider::QwtSlider Definition at line 70 of file qwt_slider.h.

enum QwtSlider::ScalePos

Scale position. QwtSlider tries to enforce valid combinations of its orientation and scale position: Qt::Horizonal combines with NoScale, TopScale and BottomScale Qt::Vertical combines with NoScale, LeftScale and RightScale See also: QwtSlider::QwtSlider Definition at line 56 of file qwt_slider.h.

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Constructor & Destructor Documentation

QwtSlider::QwtSlider (  QWidget *  parent, Qt::Orientation  orientation = Qt::Horizontal, ScalePos  scalePos = NoScale, BGSTYLE  bgStyle = BgTrough )  [explicit]

Constructor. Parameters: parent  parent widget orientation  Orientation of the slider. Can be Qt::Horizontal or Qt::Vertical. Defaults to Qt::Horizontal. scalePos  Position of the scale. Defaults to QwtSlider::NoScale. bgStyle  Background style. QwtSlider::BgTrough draws the slider button in a trough, QwtSlider::BgSlot draws a slot underneath the button. An or-combination of both may also be used. The default is QwtSlider::BgTrough. QwtSlider enforces valid combinations of its orientation and scale position. If the combination is invalid, the scale position will be set to NoScale. Valid combinations are: Qt::Horizonal with NoScale, TopScale, or BottomScale; Qt::Vertical with NoScale, LeftScale, or RightScale. Definition at line 64 of file qwt_slider.cpp.

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Member Function Documentation

QwtSlider::BGSTYLE QwtSlider::bgStyle (   )  const

Returns: the background style. Definition at line 735 of file qwt_slider.cpp.

int QwtSlider::borderWidth (   )  const

Returns: the border width. Definition at line 759 of file qwt_slider.cpp.

void QwtSlider::draw (  QPainter *  p, const QRect &  update_rect )  [protected]

Draw the QwtSlider. Definition at line 517 of file qwt_slider.cpp. References QwtAbstractScaleDraw::draw(), QwtPainter::drawFocusRect(), drawSlider(), and scaleDraw(). Referenced by paintEvent().

void QwtSlider::drawSlider (  QPainter *  p, const QRect &  r )  [protected, virtual]

Draw the slider into the specified rectangle. Definition at line 319 of file qwt_slider.cpp. References drawThumb(), QwtAbstractSlider::isValid(), QwtAbstractSlider::orientation(), QwtDoubleRange::value(), and xyPosition(). Referenced by draw().

void QwtSlider::drawThumb (  QPainter *  p, const QRect &  , int  pos )  [protected, virtual]

Draw the thumb at a position. Definition at line 395 of file qwt_slider.cpp. References QwtAbstractSlider::orientation(). Referenced by drawSlider().

void QwtSlider::fontChange (  const QFont &  oldFont  )  [protected, virtual]

Notify change in font. Definition at line 312 of file qwt_slider.cpp. References layoutSlider().

void QwtSlider::getScrollMode (  const QPoint &  p, int &  scrollMode, int &  direction )  [protected, virtual]

Determine scrolling mode and direction. Parameters: p  point scrollMode  Scrolling mode direction  Direction Implements QwtAbstractSlider. Definition at line 472 of file qwt_slider.cpp.

double QwtSlider::getValue (  const QPoint &  p  )  [protected, virtual]

Determine the value corresponding to a specified mouse location. Implements QwtAbstractSlider. Definition at line 459 of file qwt_slider.cpp. References QwtAbstractSlider::orientation().

void QwtSlider::layoutSlider (  bool  update_geometry = true  )  [protected]

Recalculate the slider's geometry and layout based on the current rect and fonts. Parameters: update_geometry  notify the layout system and call update to redraw the scale Definition at line 546 of file qwt_slider.cpp. References QwtScaleDraw::getBorderDistHint(), QwtScaleDraw::move(), QwtAbstractSlider::orientation(), scaleDraw(), and QwtScaleDraw::setLength(). Referenced by fontChange(), rangeChange(), resizeEvent(), scaleChange(), setBgStyle(), setBorderWidth(), setMargins(), setOrientation(), setScalePosition(), setThumbLength(), and setThumbWidth().

QSize QwtSlider::minimumSizeHint (   )  const [virtual]

Return a minimum size hint. Warning: The return value of QwtSlider::minimumSizeHint() depends on the font and the scale. Definition at line 777 of file qwt_slider.cpp. References QwtScaleDraw::extent(), QwtScaleDraw::getBorderDistHint(), QwtScaleDraw::minLength(), QwtAbstractSlider::orientation(), and scaleDraw(). Referenced by sizeHint().

void QwtSlider::paintEvent (  QPaintEvent *  e  )  [protected, virtual]

Qt paint event. Definition at line 501 of file qwt_slider.cpp. References draw().

void QwtSlider::rangeChange (   )  [protected, virtual]

Notify change of range. Reimplemented from QwtDoubleRange. Definition at line 692 of file qwt_slider.cpp. References QwtAbstractScale::autoScale(), layoutSlider(), QwtDoubleRange::maxValue(), QwtDoubleRange::minValue(), QwtDoubleRange::rangeChange(), and QwtAbstractScale::rescale().

void QwtSlider::resizeEvent (  QResizeEvent *  e  )  [protected, virtual]

Qt resize event. Definition at line 535 of file qwt_slider.cpp. References layoutSlider().

void QwtSlider::scaleChange (   )  [protected, virtual]

Notify changed scale. Reimplemented from QwtAbstractScale. Definition at line 305 of file qwt_slider.cpp. References layoutSlider().

QwtSlider::ScalePos QwtSlider::scalePosition (   )  const

Return the scale position. Definition at line 236 of file qwt_slider.cpp.

void QwtSlider::setBgStyle (  BGSTYLE  st  )

Set the background style. Definition at line 726 of file qwt_slider.cpp. References layoutSlider().

void QwtSlider::setBorderWidth (  int  bd  )

Change the slider's border width. Parameters: bd  border width Definition at line 245 of file qwt_slider.cpp. References layoutSlider().

void QwtSlider::setMargins (  int  xMargin, int  yMargin )

Set distances between the widget's border and internals. Parameters: xMargin  Horizontal margin yMargin  Vertical margin Definition at line 708 of file qwt_slider.cpp. References layoutSlider().

void QwtSlider::setOrientation (  Qt::Orientation  o  )  [virtual]

Set the orientation. Parameters: o  Orientation. Allowed values are Qt::Horizontal and Qt::Vertical. If the new orientation and the old scale position are an invalid combination, the scale position will be set to QwtSlider::NoScale. See also: QwtAbstractSlider::orientation() Reimplemented from QwtAbstractSlider. Definition at line 174 of file qwt_slider.cpp. References layoutSlider(), QwtAbstractSlider::orientation(), and QwtAbstractSlider::setOrientation(). Referenced by setScalePosition().

void QwtSlider::setScalePosition (  ScalePos  s  )

Change the scale position (and slider orientation). Parameters: s  Position of the scale. A valid combination of scale position and orientation is enforced: if the new scale position is Left or Right, the scale orientation will become Qt::Vertical; if the new scale position is Bottom or Top the scale orientation will become Qt::Horizontal; if the new scale position is QwtSlider::NoScale, the scale orientation will not change. Definition at line 224 of file qwt_slider.cpp. References layoutSlider(), and setOrientation().

void QwtSlider::setThumbLength (  int  thumbLength  )

Set the slider's thumb length. Parameters: thumbLength  new length Definition at line 261 of file qwt_slider.cpp. References layoutSlider().

void QwtSlider::setThumbWidth (  int  w  )

Change the width of the thumb. Parameters: w  new width Definition at line 277 of file qwt_slider.cpp. References layoutSlider().

QSize QwtSlider::sizeHint (   )  const [virtual]

Returns: QwtSlider::minimumSizeHint() Definition at line 767 of file qwt_slider.cpp. References minimumSizeHint().

int QwtSlider::thumbLength (   )  const

Returns: the thumb length. Definition at line 743 of file qwt_slider.cpp.

int QwtSlider::thumbWidth (   )  const

Returns: the thumb width. Definition at line 751 of file qwt_slider.cpp.

void QwtSlider::valueChange (   )  [protected, virtual]

Notify change of value. Reimplemented from QwtAbstractSlider. Definition at line 684 of file qwt_slider.cpp. References QwtAbstractSlider::valueChange().

int QwtSlider::xyPosition (  double  v  )  const [protected]

Find the x/y position for a given value v. Definition at line 453 of file qwt_slider.cpp. Referenced by drawSlider().

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