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

QwtThermo - The Thermometer Widget.

#include <qwt_thermo.h>

Inherits QwtAbstractScale.


enum ScalePosition { NoScale, LeadingScale, TrailingScale }
enum OriginMode { OriginMinimum, OriginMaximum, OriginCustom }


virtual void setValue (double)


QwtThermo (QWidget *parent=NULL)
virtual ~QwtThermo ()
Destructor. void setOrientation (Qt::Orientation)
Set the orientation. Qt::Orientation orientation () const
void setScalePosition (ScalePosition)
Change the position of the scale. ScalePosition scalePosition () const
void setSpacing (int)
Change the spacing between pipe and scale. int spacing () const
void setBorderWidth (int)
int borderWidth () const
void setOriginMode (OriginMode)
Change how the origin is determined. OriginMode originMode () const
void setOrigin (double)
Specifies the custom origin. double origin () const
void setFillBrush (const QBrush &)
Change the brush of the liquid. QBrush fillBrush () const
void setAlarmBrush (const QBrush &)
Specify the liquid brush above the alarm threshold. QBrush alarmBrush () const
void setAlarmLevel (double)
double alarmLevel () const
void setAlarmEnabled (bool)
Enable or disable the alarm threshold. bool alarmEnabled () const
void setColorMap (QwtColorMap *)
Assign a color map for the fill color. QwtColorMap * colorMap ()
const QwtColorMap * colorMap () const
void setPipeWidth (int)
int pipeWidth () const
void setRangeFlags (QwtInterval::BorderFlags)
Exclude/Include min/max values. QwtInterval::BorderFlags rangeFlags () const
double value () const
Return the value. virtual QSize sizeHint () const
virtual QSize minimumSizeHint () const
void setScaleDraw (QwtScaleDraw *)
Set a scale draw. const QwtScaleDraw * scaleDraw () const


virtual void drawLiquid (QPainter *, const QRect &) const
virtual void scaleChange ()
Notify a scale change. virtual void paintEvent (QPaintEvent *)
virtual void resizeEvent (QResizeEvent *)
virtual void changeEvent (QEvent *)
QwtScaleDraw * scaleDraw ()
QRect pipeRect () const
QRect fillRect (const QRect &) const
Calculate the filled rectangle of the pipe. QRect alarmRect (const QRect &) const
Calculate the alarm rectangle of the pipe.

The Thermometer Widget.

QwtThermo is a widget which displays a value in an interval. It supports:

The fill colors might be calculated from an optional color map If no color map has been assigned QwtThermo uses the following colors/brushes from the widget palette:

enum QwtThermo::OriginMode

Origin mode. This property specifies where the beginning of the liquid is placed.

See also:

setOriginMode(), setOrigin()

Enumerator

The origin is the minimum of the scale.
The origin is the maximum of the scale.
The origin is specified using the origin() property.

enum QwtThermo::ScalePosition

Position of the scale

See also:

setScalePosition(), setOrientation()

Enumerator

The slider has no scale.
The scale is right of a vertical or below of a horizontal slider.
The scale is left of a vertical or above of a horizontal slider.

Constructor

Parameters:

parent Parent widget

Returns:

Liquid brush ( QPalette::Highlight ) above the alarm threshold.

See also:

setAlarmBrush(), QWidget::palette()

Warning:

The alarm threshold has no effect, when a color map has been assigned

Returns:

True, when the alarm threshold is enabled.

Warning:

The alarm threshold has no effect, when a color map has been assigned

Returns:

Alarm threshold.

See also:

setAlarmLevel()

Warning:

The alarm threshold has no effect, when a color map has been assigned

Calculate the alarm rectangle of the pipe.

Parameters:

fillRect Filled rectangle in the pipe

Returns:

Rectangle to be filled with the alarm brush

See also:

pipeRect(), fillRect(), alarmLevel(), alarmBrush()

Returns:

Border width of the thermometer pipe.

See also:

setBorderWidth()

Qt change event handler

Parameters:

event Event

QwtColorMap * QwtThermo::colorMap ()

Returns:

Color map for the fill color

Warning:

The alarm threshold has no effect, when a color map has been assigned

const QwtColorMap * QwtThermo::colorMap () const

Returns:

Color map for the fill color

Warning:

The alarm threshold has no effect, when a color map has been assigned

Redraw the liquid in thermometer pipe.

Parameters:

painter Painter
pipeRect Bounding rectangle of the pipe without borders

Returns:

Liquid ( QPalette::ButtonText ) brush.

See also:

setFillBrush(), QWidget::palette()

Calculate the filled rectangle of the pipe.

Parameters:

pipeRect Rectangle of the pipe

Returns:

Rectangle to be filled ( fill and alarm brush )

See also:

pipeRect(), alarmRect()

Returns:

Minimum size hint

Warning:

The return value depends on the font and the scale.

See also:

sizeHint()

Returns:

Orientation

See also:

setOrientation()

Returns:

Origin of the thermo, when OriginCustom is enabled

See also:

setOrigin(), setOriginMode(), originMode()

QwtThermo::OriginMode QwtThermo::originMode () const

Returns:

Mode, how the origin is determined.

See also:

setOriginMode(), serOrigin(), origin()

Paint event handler

Parameters:

event Paint event

Returns:

Bounding rectangle of the pipe ( without borders ) in widget coordinates

Returns:

Width of the pipe.

See also:

setPipeWidth()

QwtInterval::BorderFlags QwtThermo::rangeFlags () const

Returns:

Range flags

See also:

setRangeFlags()

Resize event handler

Parameters:

event Resize event

const QwtScaleDraw * QwtThermo::scaleDraw () const

Returns:

the scale draw of the thermo

See also:

setScaleDraw()

QwtScaleDraw * QwtThermo::scaleDraw () [protected]

Returns:

the scale draw of the thermo

See also:

setScaleDraw()

QwtThermo::ScalePosition QwtThermo::scalePosition () const

Returns:

Scale position.

See also:

setScalePosition()

Specify the liquid brush above the alarm threshold. Changes the QPalette::Highlight brush of the palette.

Parameters:

brush New brush.

See also:

alarmBrush(), QWidget::setPalette()

Warning:

The alarm threshold has no effect, when a color map has been assigned

Enable or disable the alarm threshold.

Parameters:

on true (disabled) or false (enabled)

Warning:

The alarm threshold has no effect, when a color map has been assigned

Specify the alarm threshold.

Parameters:

level Alarm threshold

See also:

alarmLevel()

Warning:

The alarm threshold has no effect, when a color map has been assigned

Set the border width of the pipe.

Parameters:

width Border width

See also:

borderWidth()

Assign a color map for the fill color.

Parameters:

colorMap Color map

Warning:

The alarm threshold has no effect, when a color map has been assigned

Change the brush of the liquid. Changes the QPalette::ButtonText brush of the palette.

Parameters:

brush New brush.

See also:

fillBrush(), QWidget::setPalette()

Set the orientation.

Parameters:

orientation Allowed values are Qt::Horizontal and Qt::Vertical.

See also:

orientation(), scalePosition()

Specifies the custom origin. If originMode is set to OriginCustom this property controls where the liquid starts.

Parameters:

origin New origin level

See also:

setOriginMode(), originMode(), origin()

Change how the origin is determined.

See also:

originMode(), serOrigin(), origin()

Change the width of the pipe.

Parameters:

width Width of the pipe

See also:

pipeWidth()

Exclude/Include min/max values. According to the flags minValue() and maxValue() are included/excluded from the pipe. In case of an excluded value the corresponding tick is painted 1 pixel off of the pipeRect().

F.e. when a minimum of 0.0 has to be displayed as an empty pipe the minValue() needs to be excluded.

Parameters:

flags Range flags

See also:

rangeFlags()

Set a scale draw. For changing the labels of the scales, it is necessary to derive from QwtScaleDraw and overload QwtScaleDraw::label().

Parameters:

scaleDraw ScaleDraw object, that has to be created with new and will be deleted in ~QwtThermo() or the next call of setScaleDraw().

Change the position of the scale.

Parameters:

scalePosition Position of the scale.

See also:

ScalePosition, scalePosition()

Change the spacing between pipe and scale. A spacing of 0 means, that the backbone of the scale is below the pipe.

The default setting is 3 pixels.

Parameters:

spacing Number of pixels

See also:

spacing();

Set the current value.

Parameters:

value New Value

See also:

value()

Returns:

the minimum size hint

See also:

minimumSizeHint()

Returns:

Number of pixels between pipe and scale

See also:

setSpacing()

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Wed Jan 2 2019 Version 6.1.4