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QwtScaleWidget(3) Qwt User's Guide QwtScaleWidget(3)

NAME

QwtScaleWidget -
A Widget which contains a scale.
 

SYNOPSIS

#include <qwt_scale_widget.h>

Signals


void scaleDivChanged ()
 

Public Member Functions


QwtScaleDraw::Alignment alignment () const
 
QwtDoubleInterval colorBarInterval () const
 
QRect colorBarRect (const QRect &) const
 
int colorBarWidth () const
 
const QwtColorMap & colorMap () 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
 
int endBorderDist () const
 
void getBorderDistHint (int &start, int &end) const
 
void getMinBorderDist (int &start, int &end) const
 
bool isColorBarEnabled () const
 
int margin () const
 
virtual QSize minimumSizeHint () const
 
int penWidth () const
 
QwtScaleWidget (QWidget *parent=NULL)
 
QwtScaleWidget (QwtScaleDraw::Alignment, QWidget *parent=NULL)
 
const QwtScaleDraw * scaleDraw () const
 
QwtScaleDraw * scaleDraw ()
 
void setAlignment (QwtScaleDraw::Alignment)
 
void setBorderDist (int start, int end)
 
void setColorBarEnabled (bool)
 
void setColorBarWidth (int)
 
void setColorMap (const QwtDoubleInterval &, const QwtColorMap &)
 
void setLabelAlignment (Qt::Alignment)
 
void setLabelRotation (double rotation)
 
void setMargin (int)
 
void setMinBorderDist (int start, int end)
 
void setPenWidth (int)
 
void setScaleDiv (QwtScaleTransformation *, const QwtScaleDiv &sd)
 
void setScaleDraw (QwtScaleDraw *)
 
void setSpacing (int td)
 
void setTitle (const QString &title)
 
void setTitle (const QwtText &title)
 
virtual QSize sizeHint () const
 
int spacing () const
 
int startBorderDist () const
 
QwtText title () const
 
int titleHeightForWidth (int width) const
 
virtual ~QwtScaleWidget ()
 

Protected Member Functions


void draw (QPainter *p) const
 
void layoutScale (bool update=true)
 
virtual void paintEvent (QPaintEvent *e)
 
virtual void resizeEvent (QResizeEvent *e)
 
void scaleChange ()
 

Detailed Description

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

Constructor & Destructor Documentation

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

Create a scale with the position QwtScaleWidget::Left. Parameters:
parent Parent widget
 

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

Constructor. Parameters:
align Alignment.
 
parent Parent widget
 

QwtScaleWidget::~QwtScaleWidget () [virtual]

Destructor.

Member Function Documentation

QwtScaleDraw::Alignment QwtScaleWidget::alignment () const Returns:

position
See also:
setPosition()
 

int QwtScaleWidget::dimForLength (intlength, 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
 

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

draw the scale

void QwtScaleWidget::drawTitle (QPainter *painter, QwtScaleDraw::Alignmentalign, 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
 

int QwtScaleWidget::endBorderDist () const Returns:

end border distance
See also:
setBorderDist()
 

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()
 

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()
 

void QwtScaleWidget::layoutScale (boolupdate = true) [protected]

Recalculate the scale's geometry and layout based on.

int QwtScaleWidget::margin () const Returns:

margin
See also:
setMargin()
 

QSize QwtScaleWidget::minimumSizeHint () const [virtual] Returns:

a minimum size hint
 

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

paintEvent

int QwtScaleWidget::penWidth () const Returns:

Scale pen width
See also:
setPenWidth()
 

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

resizeEvent

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.

void QwtScaleWidget::scaleDivChanged () [signal]

Signal emitted, whenever the scale divison changes.

const QwtScaleDraw * QwtScaleWidget::scaleDraw () const scaleDraw of this scale

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

QwtScaleDraw * QwtScaleWidget::scaleDraw () scaleDraw of this scale

See also:
QwtScaleDraw::setScaleDraw()
 

void QwtScaleWidget::setAlignment (QwtScaleDraw::Alignmentalignment) Change the alignment

Parameters:
alignment New alignment
See also:
alignment()
 

void QwtScaleWidget::setBorderDist (intdist1, intdist2) 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()
 

void QwtScaleWidget::setLabelAlignment (Qt::Alignmentalignment)

Change the alignment for the labels. See also:
QwtScaleDraw::setLabelAlignment(), setLabelRotation()
 

void QwtScaleWidget::setLabelRotation (doublerotation)

Change the rotation for the labels. See QwtScaleDraw::setLabelRotation(). Parameters:
rotation Rotation
See also:
QwtScaleDraw::setLabelRotation(), setLabelFlags()
 

void QwtScaleWidget::setMargin (intmargin)

Specify the margin to the colorBar/base line. Parameters:
margin Margin
See also:
margin()
 

void QwtScaleWidget::setMinBorderDist (intstart, intend) 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()
 

void QwtScaleWidget::setPenWidth (intwidth)

Specify the width of the scale pen. Parameters:
width Pen width
See also:
penWidth()
 

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.
 

void QwtScaleWidget::setScaleDraw (QwtScaleDraw *sd) Set a scale draw sd has to be created with new and will be deleted in ~QwtScaleWidget() or the next call of setScaleDraw().

Parameters:
sd ScaleDraw object
See also:
scaleDraw()
 

void QwtScaleWidget::setSpacing (intspacing)

Specify the distance between color bar, scale and title. Parameters:
spacing Spacing
See also:
spacing()
 

void QwtScaleWidget::setTitle (const QString &title) Give title new text contents

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

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.
 

QSize QwtScaleWidget::sizeHint () const [virtual] Returns:

a size hint
 

int QwtScaleWidget::spacing () const Returns:

distance between scale and title
See also:
setMargin()
 

int QwtScaleWidget::startBorderDist () const Returns:

start border distance
See also:
setBorderDist()
 

QwtText QwtScaleWidget::title () const Returns:

title
See also:
setTitle()
 

int QwtScaleWidget::titleHeightForWidth (intwidth) const

Find the height of the title for a given width. Parameters:
width Width
Returns:
height Height
 
 

Author

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Mon Aug 1 2011 Version 5.2.2