QwtScaleWidget Class Reference

List of all members.

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Detailed Description

A Widget which contains a scale.

This Widget can be used to decorate composite widgets with a scale.

Definition at line 34 of file qwt_scale_widget.h.

Signals
void	scaleDivChanged ()
Public Member Functions
	QwtScaleWidget (QWidget *parent=NULL)
	QwtScaleWidget (QwtScaleDraw::Alignment, QWidget *parent=NULL)
virtual	~QwtScaleWidget ()
void	setTitle (const QString &title)
void	setTitle (const QwtText &title)
QwtText	title () const
void	setBorderDist (int start, int end)
int	startBorderDist () const
int	endBorderDist () const
void	getBorderDistHint (int &start, int &end) const
void	getMinBorderDist (int &start, int &end) const
void	setMinBorderDist (int start, int end)
void	setMargin (int)
int	margin () const
void	setSpacing (int td)
int	spacing () const
void	setPenWidth (int)
int	penWidth () const
void	setScaleDiv (QwtScaleTransformation *, const QwtScaleDiv &sd)
void	setScaleDraw (QwtScaleDraw *)
const QwtScaleDraw *	scaleDraw () const
QwtScaleDraw *	scaleDraw ()
void	setLabelAlignment (Qt::Alignment)
void	setLabelRotation (double rotation)
void	setColorBarEnabled (bool)
bool	isColorBarEnabled () const
void	setColorBarWidth (int)
int	colorBarWidth () const
void	setColorMap (const QwtDoubleInterval &, const QwtColorMap &)
QwtDoubleInterval	colorBarInterval () const
const QwtColorMap &	colorMap () const
virtual QSize	sizeHint () const
virtual QSize	minimumSizeHint () const
int	titleHeightForWidth (int width) const
int	dimForLength (int length, const QFont &scaleFont) const
void	drawColorBar (QPainter *painter, const QRect &rect) const
void	drawTitle (QPainter *painter, QwtScaleDraw::Alignment, const QRect &rect) const
void	setAlignment (QwtScaleDraw::Alignment)
QwtScaleDraw::Alignment	alignment () const
QRect	colorBarRect (const QRect &) const
Protected Member Functions
virtual void	paintEvent (QPaintEvent *e)
virtual void	resizeEvent (QResizeEvent *e)
void	draw (QPainter *p) const
void	scaleChange ()
void	layoutScale (bool update=true)

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Constructor & Destructor Documentation

QwtScaleWidget::QwtScaleWidget (  QWidget *  parent = NULL  )  [explicit]

Create a scale with the position QwtScaleWidget::Left. Parameters: parent  Parent widget Definition at line 64 of file qwt_scale_widget.cpp.

QwtScaleWidget::QwtScaleWidget (  QwtScaleDraw::Alignment  align, QWidget *  parent = NULL )  [explicit]

Constructor. Parameters: align  Alignment. parent  Parent widget Definition at line 88 of file qwt_scale_widget.cpp.

QwtScaleWidget::~QwtScaleWidget (   )  [virtual]

Destructor. Definition at line 96 of file qwt_scale_widget.cpp.

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Member Function Documentation

QwtScaleDraw::Alignment QwtScaleWidget::alignment (   )  const

Returns: position See also: QwtScaleWidget::setPosition Definition at line 218 of file qwt_scale_widget.cpp. References QwtScaleDraw::alignment(), and scaleDraw().

int QwtScaleWidget::dimForLength (  int  length, const QFont &  scaleFont )  const

Find the minimum dimension for a given length. dim is the height, length the width seen in direction of the title. Parameters: length  width for horizontal, height for vertical scales scaleFont  Font of the scale Returns: height for horizontal, width for vertical scales Definition at line 747 of file qwt_scale_widget.cpp. References titleHeightForWidth(). Referenced by minimumSizeHint().

void QwtScaleWidget::draw (  QPainter *  p  )  const [protected]

draw the scale Definition at line 428 of file qwt_scale_widget.cpp. References colorBarRect(), and drawColorBar(). Referenced by paintEvent().

void QwtScaleWidget::drawTitle (  QPainter *  painter, QwtScaleDraw::Alignment  align, const QRect &  rect )  const

Rotate and paint a title according to its position into a given rectangle. Parameters: painter  Painter align  Alignment rect  Bounding rectangle Definition at line 622 of file qwt_scale_widget.cpp. References QwtText::draw(), QwtText::setRenderFlags(), and title().

int QwtScaleWidget::endBorderDist (   )  const

Returns: end border distance See also: QwtScaleWidget::setBorderDist Definition at line 376 of file qwt_scale_widget.cpp. Referenced by QwtPlot::canvasMap().

void QwtScaleWidget::getBorderDistHint (  int &  start, int &  end )  const

Calculate a hint for the border distances. This member function calculates the distance of the scale's endpoints from the widget borders which is required for the mark labels to fit into the widget. The maximum of this distance an the minimum border distance is returned. Warning: The minimum border distance depends on the font. See also: setMinBorderDist(), getMinBorderDist(), setBorderDist() Definition at line 775 of file qwt_scale_widget.cpp. Referenced by layoutScale(), and minimumSizeHint().

void QwtScaleWidget::getMinBorderDist (  int &  start, int &  end )  const

Get the minimum value for the distances of the scale's endpoints from the widget borders. See also: setMinBorderDist(), getBorderDistHint() Definition at line 806 of file qwt_scale_widget.cpp.

void QwtScaleWidget::layoutScale (  bool  update = true  )  [protected]

Recalculate the scale's geometry and layout based on. Definition at line 552 of file qwt_scale_widget.cpp. References colorBarWidth(), and getBorderDistHint(). Referenced by resizeEvent(), scaleChange(), setAlignment(), setBorderDist(), setColorBarEnabled(), setColorBarWidth(), setColorMap(), setLabelRotation(), setMargin(), setPenWidth(), setScaleDiv(), setScaleDraw(), setSpacing(), and setTitle().

int QwtScaleWidget::margin (   )  const

Returns: margin See also: QwtScaleWidget::setMargin Definition at line 385 of file qwt_scale_widget.cpp.

QSize QwtScaleWidget::minimumSizeHint (   )  const [virtual]

Returns: a minimum size hint Definition at line 698 of file qwt_scale_widget.cpp. References dimForLength(), and getBorderDistHint(). Referenced by QwtPlotLayout::minimumSizeHint(), sizeHint(), and QwtPlot::sizeHint().

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

paintEvent Definition at line 410 of file qwt_scale_widget.cpp. References draw().

int QwtScaleWidget::penWidth (   )  const

Returns: Scale pen width See also: QwtScaleWidget::setPenWidth Definition at line 403 of file qwt_scale_widget.cpp.

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

resizeEvent Definition at line 542 of file qwt_scale_widget.cpp. References layoutScale().

void QwtScaleWidget::scaleChange (   )  [protected]

Notify a change of the scale. This virtual function can be overloaded by derived classes. The default implementation updates the geometry and repaints the widget. Definition at line 682 of file qwt_scale_widget.cpp. References layoutScale().

void QwtScaleWidget::scaleDivChanged (   )  [signal]

Signal emitted, whenever the scale divison changes. Referenced by setScaleDiv().

QwtScaleDraw * QwtScaleWidget::scaleDraw (   )

scaleDraw of this scale See also: QwtScaleDraw::setScaleDraw Definition at line 349 of file qwt_scale_widget.cpp.

const QwtScaleDraw * QwtScaleWidget::scaleDraw (   )  const

scaleDraw of this scale See also: QwtScaleDraw::setScaleDraw Definition at line 340 of file qwt_scale_widget.cpp. Referenced by alignment(), QwtPlot::axisScaleDraw(), QwtPlot::printScale(), and QwtPlot::sizeHint().

void QwtScaleWidget::setAlignment (  QwtScaleDraw::Alignment  alignment  )

Change the alignment Parameters: alignment  New alignment See also: QwtScaleWidget::alignment Definition at line 187 of file qwt_scale_widget.cpp. References layoutScale().

void QwtScaleWidget::setBorderDist (  int  dist1, int  dist2 )

Specify distances of the scale's endpoints from the widget's borders. The actual borders will never be less than minimum border distance. Parameters: dist1  Left or top Distance dist2  Right or bottom distance See also: QwtScaleWidget::borderDist Definition at line 234 of file qwt_scale_widget.cpp. References layoutScale().

void QwtScaleWidget::setLabelAlignment (  Qt::Alignment  alignment  )

Change the alignment for the labels. See also: QwtScaleDraw::setLabelAlignment(), QwtScaleWidget::setLabelRotation() Definition at line 299 of file qwt_scale_widget.cpp.

void QwtScaleWidget::setLabelRotation (  double  rotation  )

Change the rotation for the labels. See QwtScaleDraw::setLabelRotation(). See also: QwtScaleDraw::setLabelRotation(), QwtScaleWidget::setLabelFlags() Definition at line 311 of file qwt_scale_widget.cpp. References layoutScale(). Referenced by QwtPlot::setAxisLabelRotation().

void QwtScaleWidget::setMargin (  int  margin  )

Specify the margin to the colorBar/base line. Parameters: margin  Margin See also: QwtScaleWidget::margin Definition at line 249 of file qwt_scale_widget.cpp. References layoutScale().

void QwtScaleWidget::setMinBorderDist (  int  start, int  end )

Set a minimum value for the distances of the scale's endpoints from the widget borders. This is useful to avoid that the scales are "jumping", when the tick labels or their positions change often. See also: getMinBorderDist(), getBorderDistHint() Definition at line 794 of file qwt_scale_widget.cpp.

void QwtScaleWidget::setPenWidth (  int  width  )

Specify the width of the scale pen. Parameters: width  Pen width See also: QwtScaleWidget::penWidth Definition at line 279 of file qwt_scale_widget.cpp. References layoutScale().

void QwtScaleWidget::setScaleDiv (  QwtScaleTransformation *  transformation, const QwtScaleDiv &  scaleDiv )

Assign a scale division. The scale division determines where to set the tick marks. Parameters: transformation  Transformation, needed to translate between scale and pixal values scaleDiv  Scale Division See also: For more information about scale divisions, see QwtScaleDiv. Definition at line 840 of file qwt_scale_widget.cpp. References layoutScale(), QwtAbstractScaleDraw::map(), QwtAbstractScaleDraw::scaleDiv(), scaleDivChanged(), QwtAbstractScaleDraw::setScaleDiv(), QwtAbstractScaleDraw::setTransformation(), QwtScaleMap::transformation(), and QwtScaleTransformation::type().

void QwtScaleWidget::setScaleDraw (  QwtScaleDraw *   )

Set a scale draw sd has to be created with new and will be deleted in QwtScaleWidget::~QwtScale or the next call of QwtScaleWidget::setScaleDraw. Definition at line 322 of file qwt_scale_widget.cpp. References layoutScale(), and QwtScaleDraw::setAlignment(). Referenced by QwtPlot::setAxisScaleDraw().

void QwtScaleWidget::setSpacing (  int  spacing  )

Specify the distance between color bar, scale and title. Parameters: spacing  Spacing See also: QwtScaleWidget::spacing Definition at line 264 of file qwt_scale_widget.cpp. References layoutScale().

void QwtScaleWidget::setTitle (  const QwtText &  title  )

Give title new text contents. Parameters: title  New title See also: QwtScaleWidget::title Warning: The title flags are interpreted in direction of the label, AlignTop, AlignBottom can't be set as the title will always be aligned to the scale. Definition at line 168 of file qwt_scale_widget.cpp. References layoutScale(), QwtText::renderFlags(), QwtText::setRenderFlags(), and title().

QSize QwtScaleWidget::sizeHint (   )  const [virtual]

Returns: a size hint Definition at line 690 of file qwt_scale_widget.cpp. References minimumSizeHint().

int QwtScaleWidget::spacing (   )  const

Returns: distance between scale and title See also: QwtScaleWidget::setMargin Definition at line 394 of file qwt_scale_widget.cpp. Referenced by QwtPlot::printScale().

int QwtScaleWidget::startBorderDist (   )  const

Returns: start border distance See also: QwtScaleWidget::setBorderDist Definition at line 367 of file qwt_scale_widget.cpp. Referenced by QwtPlot::canvasMap().

QwtText QwtScaleWidget::title (   )  const

Returns: title See also: QwtScaleWidget::setTitle Definition at line 358 of file qwt_scale_widget.cpp. Referenced by QwtPlot::axisTitle(), drawTitle(), and setTitle().

int QwtScaleWidget::titleHeightForWidth (  int  width  )  const

Find the height of the title for a given width. Parameters: width  Width Returns: height Height Definition at line 733 of file qwt_scale_widget.cpp. Referenced by dimForLength().

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