A Widget which contains a scale. More...

#include <qwt_scale_widget.h>

Inheritance diagram for QwtScaleWidget:

Public Types
enum	LayoutFlag { TitleInverted = 1 }
	Layout flags of the title. More...

typedef QFlags< LayoutFlag >	LayoutFlags
	Layout flags of the title.

Signals
void	scaleDivChanged ()
	Signal emitted, whenever the scale division changes.

Public Member Functions
	QwtScaleWidget (QWidget *parent=NULL)
	Create a scale with the position QwtScaleWidget::Left. More...

	QwtScaleWidget (QwtScaleDraw::Alignment, QWidget *parent=NULL)
	Constructor. More...

virtual	~QwtScaleWidget ()
	Destructor.

void	setTitle (const QString &title)

void	setTitle (const QwtText &title)

QwtText	title () const

void	setLayoutFlag (LayoutFlag, bool on)

bool	testLayoutFlag (LayoutFlag) const

void	setBorderDist (int dist1, int dist2)

int	startBorderDist () const

int	endBorderDist () const

void	getBorderDistHint (int &start, int &end) const
	Calculate a hint for the border distances. More...

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

void	setMinBorderDist (int start, int end)

void	setMargin (int)
	Specify the margin to the colorBar/base line. More...

int	margin () const

void	setSpacing (int)
	Specify the distance between color bar, scale and title. More...

int	spacing () const

void	setScaleDiv (const QwtScaleDiv &)
	Assign a scale division. More...

void	setTransformation (QwtTransform *)

void	setScaleDraw (QwtScaleDraw *)

const QwtScaleDraw *	scaleDraw () const

QwtScaleDraw *	scaleDraw ()

void	setLabelAlignment (Qt::Alignment)
	Change the alignment for the labels. More...

void	setLabelRotation (double rotation)
	Change the rotation for the labels. See QwtScaleDraw::setLabelRotation(). More...

void	setColorBarEnabled (bool)

bool	isColorBarEnabled () const

void	setColorBarWidth (int)

int	colorBarWidth () const

void	setColorMap (const QwtInterval &, QwtColorMap *)

QwtInterval	colorBarInterval () const

const QwtColorMap *	colorMap () const

virtual QSize	sizeHint () const

virtual QSize	minimumSizeHint () const

int	titleHeightForWidth (int width) const
	Find the height of the title for a given width. More...

int	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. More...

void	drawColorBar (QPainter *painter, const QRectF &) const

void	drawTitle (QPainter *painter, QwtScaleDraw::Alignment, const QRectF &rect) const

void	setAlignment (QwtScaleDraw::Alignment)

QwtScaleDraw::Alignment	alignment () const

QRectF	colorBarRect (const QRectF &) const

Protected Member Functions
virtual void	paintEvent (QPaintEvent *)
	paintEvent

virtual void	resizeEvent (QResizeEvent *)

void	draw (QPainter *) const
	draw the scale

void	scaleChange ()
	Notify a change of the scale. More...

void	layoutScale (bool update_geometry=true)

Detailed Description

A Widget which contains a scale.

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

Member Enumeration Documentation

◆ LayoutFlag

enum QwtScaleWidget::LayoutFlag

Layout flags of the title.

Enumerator
TitleInverted	The title of vertical scales is painted from top to bottom. Otherwise it is painted from bottom to top.

Constructor & Destructor Documentation

◆ QwtScaleWidget() [1/2]

QwtScaleWidget::QwtScaleWidget ( QWidget * parent = NULL )

explicit

Create a scale with the position QwtScaleWidget::Left.

Parameters

parent Parent widget

◆ QwtScaleWidget() [2/2]

QwtScaleWidget::QwtScaleWidget	(	QwtScaleDraw::Alignment	align,
		QWidget *	parent = `NULL`
	)

explicit

Constructor.

Parameters

align	Alignment.
parent	Parent widget

Member Function Documentation

◆ alignment()

QwtScaleDraw::Alignment QwtScaleWidget::alignment ( ) const

Returns: position

See also: setPosition()

◆ colorBarInterval()

QwtInterval QwtScaleWidget::colorBarInterval ( ) const

Returns: Value interval for the color bar

See also: setColorMap(), colorMap()

◆ colorBarRect()

QRectF QwtScaleWidget::colorBarRect ( const QRectF & rect ) const

Calculate the the rectangle for the color bar

Parameters

rect	Bounding rectangle for all components of the scale

Returns: Rectangle for the color bar

◆ colorBarWidth()

int QwtScaleWidget::colorBarWidth ( ) const

Returns: Width of the color bar

See also: setColorBarEnabled(), setColorBarEnabled()

◆ colorMap()

const QwtColorMap * QwtScaleWidget::colorMap ( ) const

Returns: Color map

See also: setColorMap(), colorBarInterval()

◆ dimForLength()

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

◆ drawColorBar()

void QwtScaleWidget::drawColorBar	(	QPainter *	painter,
		const QRectF &	rect
	)		const

Draw the color bar of the scale widget

Parameters

painter	Painter
rect	Bounding rectangle for the color bar

See also: setColorBarEnabled()

◆ drawTitle()

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

Rotate and paint a title according to its position into a given rectangle.

Parameters

painter	Painter
align	Alignment
rect	Bounding rectangle

◆ endBorderDist()

int QwtScaleWidget::endBorderDist ( ) const

Returns: end border distance

See also: setBorderDist()

◆ getBorderDistHint()

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.

Parameters

start	Return parameter for the border width at the beginning of the scale
end	Return parameter for the border width at the end of the scale

Warning

The minimum border distance depends on the font.

See also: setMinBorderDist(), getMinBorderDist(), setBorderDist()

◆ getMinBorderDist()

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

Get the minimum value for the distances of the scale's endpoints from the widget borders.

Parameters

start	Return parameter for the border width at the beginning of the scale
end	Return parameter for the border width at the end of the scale

See also: setMinBorderDist(), getBorderDistHint()

◆ isColorBarEnabled()

bool QwtScaleWidget::isColorBarEnabled ( ) const

Returns: true, when the color bar is enabled

See also: setColorBarEnabled(), setColorBarWidth()

◆ layoutScale()

void QwtScaleWidget::layoutScale ( bool update_geometry = true )

protected

Recalculate the scale's geometry and layout based on the current geometry and fonts.

Parameters

update_geometry Notify the layout system and call update to redraw the scale

◆ margin()

int QwtScaleWidget::margin ( ) const

Returns: margin

See also: setMargin()

◆ minimumSizeHint()

QSize QwtScaleWidget::minimumSizeHint ( ) const

virtual

Returns: a minimum size hint

◆ resizeEvent()

void QwtScaleWidget::resizeEvent ( QResizeEvent * event )

protectedvirtual

Event handler for resize events

Parameters

event Resize event

◆ scaleChange()

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.

◆ scaleDraw() [1/2]

QwtScaleDraw * QwtScaleWidget::scaleDraw ( )

Returns: scaleDraw of this scale

See also: QwtScaleDraw::setScaleDraw()

◆ scaleDraw() [2/2]

const QwtScaleDraw * QwtScaleWidget::scaleDraw ( ) const

Returns: scaleDraw of this scale

See also: setScaleDraw(), QwtScaleDraw::setScaleDraw()

◆ setAlignment()

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

Change the alignment

Parameters

alignment New alignment

See also: alignment()

◆ setBorderDist()

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: borderDist()

◆ setColorBarEnabled()

void QwtScaleWidget::setColorBarEnabled ( bool on )

En/disable a color bar associated to the scale

See also: isColorBarEnabled(), setColorBarWidth()

◆ setColorBarWidth()

void QwtScaleWidget::setColorBarWidth ( int width )

Set the width of the color bar

Parameters

width Width

See also: colorBarWidth(), setColorBarEnabled()

◆ setColorMap()

void QwtScaleWidget::setColorMap	(	const QwtInterval &	interval,
		QwtColorMap *	colorMap
	)

Set the color map and value interval, that are used for displaying the color bar.

Parameters

interval	Value interval
colorMap	Color map

See also: colorMap(), colorBarInterval()

◆ setLabelAlignment()

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

Change the alignment for the labels.

See also: QwtScaleDraw::setLabelAlignment(), setLabelRotation()

◆ setLabelRotation()

void QwtScaleWidget::setLabelRotation ( double rotation )

Change the rotation for the labels. See QwtScaleDraw::setLabelRotation().

Parameters

rotation Rotation

See also: QwtScaleDraw::setLabelRotation(), setLabelFlags()

◆ setLayoutFlag()

void QwtScaleWidget::setLayoutFlag	(	LayoutFlag	flag,
		bool	on
	)

Toggle an layout flag

Parameters

flag	Layout flag
on	true/false

See also: testLayoutFlag(), LayoutFlag

◆ setMargin()

void QwtScaleWidget::setMargin ( int margin )

Specify the margin to the colorBar/base line.

Parameters

margin Margin

See also: margin()

◆ setMinBorderDist()

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.

Parameters

start	Minimum for the start border
end	Minimum for the end border

See also: getMinBorderDist(), getBorderDistHint()

◆ setScaleDiv()

void QwtScaleWidget::setScaleDiv ( const QwtScaleDiv & scaleDiv )

Assign a scale division.

The scale division determines where to set the tick marks.

Parameters

scaleDiv Scale Division

See also: For more information about scale divisions, see QwtScaleDiv.

◆ setScaleDraw()

void QwtScaleWidget::setScaleDraw ( QwtScaleDraw * scaleDraw )

Set a scale draw

scaleDraw has to be created with new and will be deleted in ~QwtScaleWidget() or the next call of setScaleDraw(). scaleDraw will be initialized with the attributes of the previous scaleDraw object.

Parameters

scaleDraw ScaleDraw object

See also: scaleDraw()

◆ setSpacing()

void QwtScaleWidget::setSpacing ( int spacing )

Specify the distance between color bar, scale and title.

Parameters

spacing Spacing

See also: spacing()

◆ setTitle() [1/2]

void QwtScaleWidget::setTitle ( const QString & title )

Give title new text contents

Parameters

title New title

See also: title(), setTitle(const QwtText &);

◆ setTitle() [2/2]

void QwtScaleWidget::setTitle ( const QwtText & title )

Give title new text contents

Parameters

title New title

See also: 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.

◆ setTransformation()

void QwtScaleWidget::setTransformation ( QwtTransform * transformation )

Set the transformation

Parameters

transformation Transformation

See also: QwtAbstractScaleDraw::scaleDraw(), QwtScaleMap

◆ sizeHint()

QSize QwtScaleWidget::sizeHint ( ) const

virtual

Returns: a size hint

◆ spacing()

int QwtScaleWidget::spacing ( ) const

Returns: distance between scale and title

See also: setMargin()

◆ startBorderDist()

int QwtScaleWidget::startBorderDist ( ) const

Returns: start border distance

See also: setBorderDist()

◆ testLayoutFlag()

bool QwtScaleWidget::testLayoutFlag ( LayoutFlag flag ) const

Test a layout flag

Parameters

flag	Layout flag

Returns: true/false

See also: setLayoutFlag(), LayoutFlag

◆ title()

QwtText QwtScaleWidget::title ( ) const

Returns: title

See also: setTitle()

◆ titleHeightForWidth()

int QwtScaleWidget::titleHeightForWidth ( int width ) const

Find the height of the title for a given width.

Parameters

width Width

Returns: height Height

Public Types

Signals

Public Member Functions

Protected Member Functions

Detailed Description

Member Enumeration Documentation

◆ LayoutFlag

Constructor & Destructor Documentation

◆ QwtScaleWidget() [1/2]

◆ QwtScaleWidget() [2/2]

Member Function Documentation

◆ alignment()

◆ colorBarInterval()

◆ colorBarRect()

◆ colorBarWidth()

◆ colorMap()

◆ dimForLength()

◆ drawColorBar()

◆ drawTitle()

◆ endBorderDist()

◆ getBorderDistHint()

◆ getMinBorderDist()

◆ isColorBarEnabled()

◆ layoutScale()

◆ margin()

◆ minimumSizeHint()

◆ resizeEvent()

◆ scaleChange()

◆ scaleDraw() [1/2]

◆ scaleDraw() [2/2]

◆ setAlignment()

◆ setBorderDist()

◆ setColorBarEnabled()

◆ setColorBarWidth()

◆ setColorMap()

◆ setLabelAlignment()

◆ setLabelRotation()

◆ setLayoutFlag()

◆ setMargin()

◆ setMinBorderDist()

◆ setScaleDiv()

◆ setScaleDraw()

◆ setSpacing()

◆ setTitle() [1/2]

◆ setTitle() [2/2]

◆ setTransformation()

◆ sizeHint()

◆ spacing()

◆ startBorderDist()

◆ testLayoutFlag()

◆ title()

◆ titleHeightForWidth()