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

QwtScaleWidget - A Widget which contains a scale.

#include <qwt_scale_widget.h>

Inherits QWidget.


enum LayoutFlag { TitleInverted = 1 }
Layout flags of the title. typedef QFlags< LayoutFlag > LayoutFlags


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


QwtScaleWidget (QWidget *parent=NULL)
Create a scale with the position QwtScaleWidget::Left. QwtScaleWidget (QwtScaleDraw::Alignment, QWidget *parent=NULL)
Constructor. 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. void getMinBorderDist (int &start, int &end) const
void setMinBorderDist (int start, int end)
void setMargin (int)
Specify the margin to the colorBar/base line. int margin () const
void setSpacing (int)
Specify the distance between color bar, scale and title. int spacing () const
void setScaleDiv (const QwtScaleDiv &)
Assign a scale division. void setTransformation (QwtTransform *)
void setScaleDraw (QwtScaleDraw *)
const QwtScaleDraw * scaleDraw () const
QwtScaleDraw * scaleDraw ()
void setLabelAlignment (Qt::Alignment)
Change the alignment for the labels. void setLabelRotation (double rotation)
Change the rotation for the labels. See QwtScaleDraw::setLabelRotation(). 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 override
virtual QSize minimumSizeHint () const override
int titleHeightForWidth (int width) const
Find the height of the title for a given width. 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. void drawColorBar (QPainter *, const QRectF &) const
void drawTitle (QPainter *, QwtScaleDraw::Alignment, const QRectF &rect) const
void setAlignment (QwtScaleDraw::Alignment)
QwtScaleDraw::Alignment alignment () const
QRectF colorBarRect (const QRectF &) const


virtual void paintEvent (QPaintEvent *) override
paintEvent virtual void resizeEvent (QResizeEvent *) override
virtual void changeEvent (QEvent *) override
void draw (QPainter *) const
draw the scale void scaleChange ()
Notify a change of the scale. void layoutScale (bool update_geometry=true)

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.

An ORed combination of LayoutFlag values.

Definition at line 49 of file qwt_scale_widget.h.

Layout flags of the title.

Enumerator

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

Definition at line 40 of file qwt_scale_widget.h.

Create a scale with the position QwtScaleWidget::Left.

Parameters

parent Parent widget

Definition at line 68 of file qwt_scale_widget.cpp.

Constructor.

Parameters

align Alignment.
parent Parent widget

Definition at line 79 of file qwt_scale_widget.cpp.

QwtScaleDraw::Alignment QwtScaleWidget::alignment () const

Returns

position

See also

setPosition()

Definition at line 234 of file qwt_scale_widget.cpp.

Change Event handler

Parameters

event Change event

Invalidates internal caches if necessary

Definition at line 519 of file qwt_scale_widget.cpp.

QwtInterval QwtScaleWidget::colorBarInterval () const

Returns

Value interval for the color bar

See also

setColorMap(), colorMap()

Definition at line 941 of file qwt_scale_widget.cpp.

Calculate the the rectangle for the color bar

Parameters

rect Bounding rectangle for all components of the scale

Returns

Rectangle for the color bar

Definition at line 462 of file qwt_scale_widget.cpp.

Returns

Width of the color bar

See also

setColorBarEnabled(), setColorBarEnabled()

Definition at line 932 of file qwt_scale_widget.cpp.

const QwtColorMap * QwtScaleWidget::colorMap () const

Returns

Color map

See also

setColorMap(), colorBarInterval()

Definition at line 974 of file qwt_scale_widget.cpp.

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 781 of file qwt_scale_widget.cpp.

Draw the color bar of the scale widget

Parameters

painter Painter
rect Bounding rectangle for the color bar

See also

setColorBarEnabled()

Definition at line 624 of file qwt_scale_widget.cpp.

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

Parameters

painter Painter
align Alignment
rect Bounding rectangle

Definition at line 644 of file qwt_scale_widget.cpp.

Returns

end border distance

See also

setBorderDist()

Definition at line 389 of file qwt_scale_widget.cpp.

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()

Definition at line 814 of file qwt_scale_widget.cpp.

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()

Definition at line 852 of file qwt_scale_widget.cpp.

Returns

true, when the color bar is enabled

See also

setColorBarEnabled(), setColorBarWidth()

Definition at line 907 of file qwt_scale_widget.cpp.

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

Definition at line 547 of file qwt_scale_widget.cpp.

Returns

margin

See also

setMargin()

Definition at line 398 of file qwt_scale_widget.cpp.

Returns

a minimum size hint

Definition at line 732 of file qwt_scale_widget.cpp.

Event handler for resize events

Parameters

event Resize event

Definition at line 533 of file qwt_scale_widget.cpp.

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 716 of file qwt_scale_widget.cpp.

QwtScaleDraw * QwtScaleWidget::scaleDraw ()

Returns

scaleDraw of this scale

See also

QwtScaleDraw::setScaleDraw()

Definition at line 362 of file qwt_scale_widget.cpp.

const QwtScaleDraw * QwtScaleWidget::scaleDraw () const

Returns

scaleDraw of this scale

See also

setScaleDraw(), QwtScaleDraw::setScaleDraw()

Definition at line 353 of file qwt_scale_widget.cpp.

Change the alignment

Parameters

alignment New alignment

See also

alignment()

Definition at line 209 of file qwt_scale_widget.cpp.

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()

Definition at line 250 of file qwt_scale_widget.cpp.

En/disable a color bar associated to the scale

See also

isColorBarEnabled(), setColorBarWidth()

Definition at line 894 of file qwt_scale_widget.cpp.

Set the width of the color bar

Parameters

width Width

See also

colorBarWidth(), setColorBarEnabled()

Definition at line 918 of file qwt_scale_widget.cpp.

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()

Definition at line 955 of file qwt_scale_widget.cpp.

Change the alignment for the labels.

See also

QwtScaleDraw::setLabelAlignment(), setLabelRotation()

Definition at line 295 of file qwt_scale_widget.cpp.

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

Parameters

rotation Rotation

See also

QwtScaleDraw::setLabelRotation(), setLabelFlags()

Definition at line 308 of file qwt_scale_widget.cpp.

Toggle an layout flag

Parameters

flag Layout flag
on true/false

See also

testLayoutFlag(), LayoutFlag

Definition at line 141 of file qwt_scale_widget.cpp.

Specify the margin to the colorBar/base line.

Parameters

margin Margin

See also

margin()

Definition at line 265 of file qwt_scale_widget.cpp.

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()

Definition at line 835 of file qwt_scale_widget.cpp.

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.

Definition at line 866 of file qwt_scale_widget.cpp.

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()

Definition at line 325 of file qwt_scale_widget.cpp.

Specify the distance between color bar, scale and title.

Parameters

spacing Spacing

See also

spacing()

Definition at line 280 of file qwt_scale_widget.cpp.

Give title new text contents

Parameters

title New title

See also

title(), setTitle(const QwtText &);

Definition at line 172 of file qwt_scale_widget.cpp.

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.

Definition at line 190 of file qwt_scale_widget.cpp.

Set the transformation

Parameters

transformation Transformation

See also

QwtAbstractScaleDraw::scaleDraw(), QwtScaleMap

Definition at line 884 of file qwt_scale_widget.cpp.

Returns

a size hint

Definition at line 724 of file qwt_scale_widget.cpp.

Returns

distance between scale and title

See also

setMargin()

Definition at line 407 of file qwt_scale_widget.cpp.

Returns

start border distance

See also

setBorderDist()

Definition at line 380 of file qwt_scale_widget.cpp.

Test a layout flag

Parameters

flag Layout flag

Returns

true/false

See also

setLayoutFlag(), LayoutFlag

Definition at line 161 of file qwt_scale_widget.cpp.

QwtText QwtScaleWidget::title () const

Returns

title

See also

setTitle()

Definition at line 371 of file qwt_scale_widget.cpp.

Find the height of the title for a given width.

Parameters

width Width

Returns

height Height

Definition at line 767 of file qwt_scale_widget.cpp.

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Sun Jul 18 2021 Version 6.2.0