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QwtScaleWidget

NAME

QwtScaleWidget -

A Widget which contains a scale.

SYNOPSIS

#include <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)

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

Constructor. Parameters:

align Alignment.
parent Parent widget

QwtScaleWidget::~QwtScaleWidget () [virtual]

Destructor.

Member Function Documentation

QwtScaleDraw::Alignment QwtScaleWidget::alignment () constReturns:

position

See also:

setPosition()

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

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

draw the scale

void QwtScaleWidget::drawTitle (QPainter * painter, QwtScaleDraw::Alignment align, const QRect & rect) constRotate and paint a title according to its position into a given rectangle.

Parameters:

painter Painter
align Alignment
rect Bounding rectangle

int QwtScaleWidget::endBorderDist () constReturns:

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

See also:

setMinBorderDist(), getBorderDistHint()

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

Recalculate the scale's geometry and layout based on.

int QwtScaleWidget::margin () constReturns:

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 () constReturns:

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.

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

See also:

QwtScaleDraw::setScaleDraw()

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

See also:

setScaleDraw(), QwtScaleDraw::setScaleDraw()

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

Parameters:

alignment New alignment

See also:

alignment()

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()

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

Change the alignment for the labels. See also:

QwtScaleDraw::setLabelAlignment(), setLabelRotation()

void QwtScaleWidget::setLabelRotation (double rotation)

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

rotation Rotation

See also:

QwtScaleDraw::setLabelRotation(), setLabelFlags()

void QwtScaleWidget::setMargin (int margin)

Specify the margin to the colorBar/base line. Parameters:

margin Margin

See also:

margin()

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()

void QwtScaleWidget::setPenWidth (int width)

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 (int spacing)

Specify the distance between color bar, scale and title. Parameters:

spacing Spacing

See also:

spacing()

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.

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

Parameters:

title New title

See also:

title(), setTitle(const QwtText &);

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

a size hint

int QwtScaleWidget::spacing () constReturns:

distance between scale and title

See also:

setMargin()

int QwtScaleWidget::startBorderDist () constReturns:

start border distance

See also:

setBorderDist()

QwtText QwtScaleWidget::title () constReturns:

title

See also:

setTitle()

int QwtScaleWidget::titleHeightForWidth (int width) const

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

width Width

Returns:

height Height

Author

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