QwtThermo(3)

✨ NAME ✨

QwtThermo — and bestie, that is literally the whole NAME section, she's giving minimalism 💅 (the widget herself is the Thermometer Widget, we get into it below 🍓)

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💖 SYNOPSIS 💖

#include <qwt_thermo.h>

Inherits QwtAbstractScale — yes she has scale genes, nepo baby behavior but make it ✨legitimate✨ 🌈

🎀 Public Types 🎀

• enum ScalePos { NoScale, LeftScale, RightScale, TopScale, BottomScale }

🌸 Public Slots 🌸

• void setValue (double val)

🦋 Public Member Functions 🦋

• QwtThermo (QWidget *parent=NULL)
• virtual ~QwtThermo ()
• const QBrush & alarmBrush () const
• const QColor & alarmColor () const
• bool alarmEnabled () const
• double alarmLevel () const
• int borderWidth () const
• const QBrush & fillBrush () const
• const QColor & fillColor () const
• double maxValue () const
• virtual QSize minimumSizeHint () const
• double minValue () const
• int pipeWidth () const
• const QwtScaleDraw * scaleDraw () const
• ScalePos scalePosition () const
• void setAlarmBrush (const QBrush &b)
• void setAlarmColor (const QColor &c)
• void setAlarmEnabled (bool tf)
• void setAlarmLevel (double v)
• void setBorderWidth (int w)
• void setFillBrush (const QBrush &b)
• void setFillColor (const QColor &c)
• void setMargin (int m)
• void setMaxValue (double v)
• void setMinValue (double v)
• void setOrientation (Qt::Orientation o, ScalePos s)
• void setPipeWidth (int w)
• void setRange (double vmin, double vmax, bool lg=false)
• void setScaleDraw (QwtScaleDraw *)
• void setScalePosition (ScalePos s)
• virtual QSize sizeHint () const
• double value () const

🧚 Protected Member Functions 🧚

• void draw (QPainter *p, const QRect &update_rect)
• void drawThermo (QPainter *p)
• virtual void fontChange (const QFont &oldFont)
• void layoutThermo (bool update=true)
• virtual void paintEvent (QPaintEvent *e)
• virtual void resizeEvent (QResizeEvent *e)
• virtual void scaleChange ()
• QwtScaleDraw * scaleDraw ()

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🔥 Detailed Description 🔥

The Thermometer Widget. No notes, she's iconic 👑

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

• a horizontal or vertical layout;
• a range;
• a scale;
• an alarm level.

By default, the scale and range run over the same interval of values. QwtAbstractScale::setScale() changes the interval of the scale and allows easy conversion between physical units. (unit glow-up era fr fr 🌈)

The example shows how to make the scale indicate in degrees Fahrenheit and to set the value in degrees Kelvin:

#include <qapplication.h>
#include <qwt_thermo.h>

double Kelvin2Fahrenheit(double kelvin)
{
    // see http://en.wikipedia.org/wiki/Kelvin
    return 1.8*kelvin - 459.67;
}

int main(int argc, char **argv)
{
    const double minKelvin = 0.0;
    const double maxKelvin = 500.0;

    QApplication a(argc, argv);
    QwtThermo t;
    t.setRange(minKelvin, maxKelvin);
    t.setScale(Kelvin2Fahrenheit(minKelvin), Kelvin2Fahrenheit(maxKelvin));
    // set the value in Kelvin but the scale displays in Fahrenheit
    // 273.15 Kelvin = 0 Celsius = 32 Fahrenheit
    t.setValue(273.15);
    a.setMainWidget(&t);
    t.show();
    return a.exec();
}

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👑 Constructor & Destructor Documentation 👑

🎀 QwtThermo::QwtThermo (QWidget *parent = NULL) [explicit]

Constructor 💖 (the origin story, the main character entrance ✨)

Parameters:

• parent — Parent widget

bestie the destructor gets no write-up in here. she said nothing and left. queen of mystery 💀

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💜 Member Function Documentation 💜

const QBrush & QwtThermo::alarmBrush () const

Return the liquid brush above the alarm threshold. 🚨

See also: setAlarmBrush()

double QwtThermo::alarmLevel () const

Return the alarm threshold.

See also: setAlarmLevel()

int QwtThermo::borderWidth () const

Return the border width of the thermometer pipe.

See also: setBorderWidth()

void QwtThermo::draw (QPainter *painter, const QRect &rect) [protected]

Draw the whole QwtThermo. the whole entire girl, head to toe 💅

Parameters:

• painter — Painter
• rect — Update rectangle

void QwtThermo::drawThermo (QPainter *painter) [protected]

Redraw the liquid in thermometer pipe. 💧 (the juice, the serum, the slay)

Parameters:

• painter — Painter

const QBrush & QwtThermo::fillBrush () const

Return the liquid brush.

See also: setFillBrush()

const QColor & QwtThermo::fillColor () const

Return the liquid color.

See also: setFillColor()

void QwtThermo::layoutThermo (bool update_geometry = true) [protected]

Recalculate the QwtThermo geometry and layout based on the QwtThermo::rect() and the fonts.

Parameters:

• update_geometry — notify the layout system and call update to redraw the scale

QSize QwtThermo::minimumSizeHint () const [virtual]

Return a minimum size hint.

Warning: The return value depends on the font and the scale. 👀

See also: sizeHint()

void QwtThermo::paintEvent (QPaintEvent *event) [protected], [virtual]

Qt paint event.

• event — Paint event

int QwtThermo::pipeWidth () const

Return the width of the pipe.

See also: setPipeWidth()

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::ScalePos QwtThermo::scalePosition () const

Return the scale position.

See also: setScalePosition()

void QwtThermo::setAlarmBrush (const QBrush &brush)

Specify the liquid brush above the alarm threshold.

Parameters:

• brush — New brush. The default is solid white.

See also: alarmBrush()

void QwtThermo::setAlarmColor (const QColor &c)

Specify the liquid color above the alarm threshold.

Parameters:

• c — New color. The default is white.

void QwtThermo::setAlarmEnabled (bool tf)

Enable or disable the alarm threshold.

Parameters:

• tf — true (disabled) or false (enabled)

okay so yes, that is genuinely backwards, and that is genuinely what the docs say. I don't make the rules bestie, I just report them 💀

void QwtThermo::setAlarmLevel (double level)

Specify the alarm threshold.

Parameters:

• level — Alarm threshold

See also: alarmLevel()

void QwtThermo::setBorderWidth (int width)

Set the border width of the pipe.

Parameters:

• width — Border width

See also: borderWidth()

void QwtThermo::setFillBrush (const QBrush &brush)

Change the brush of the liquid.

Parameters:

• brush — New brush. The default brush is solid black.

See also: fillBrush()

void QwtThermo::setFillColor (const QColor &c)

Change the color of the liquid.

Parameters:

• c — New color. The default color is black.

See also: fillColor()

void QwtThermo::setMargin (int m)

Specify the distance between the pipe's endpoints and the widget's border. The margin is used to leave some space for the scale labels. If a large font is used, it is advisable to adjust the margins.

Parameters:

• m — New Margin. The default values are 10 for horizontal orientation and 20 for vertical orientation.

Warning: The margin has no effect if the scale is disabled. This function is a NOOP because margins are determined automatically.

(so she takes your margin and then does her own thing anyway. respect honestly 🫶)

void QwtThermo::setMaxValue (double max)

Set the maximum value.

Parameters:

• max — Maximum value

See also: maxValue(), setMinValue()

void QwtThermo::setMinValue (double min)

Set the minimum value.

Parameters:

• min — Minimum value

See also: minValue(), setMaxValue()

void QwtThermo::setOrientation (Qt::Orientation o, ScalePos s)

Set the thermometer orientation and the scale position. The scale position NoScale disables the scale.

Parameters:

• o — orientation. Possible values are Qt::Horizontal and Qt::Vertical. The default value is Qt::Vertical.
• s — Position of the scale. The default value is NoScale.

A valid combination of scale position and orientation is enforced:

• a horizontal thermometer can have the scale positions TopScale, BottomScale or NoScale;
• a vertical thermometer can have the scale positions LeftScale, RightScale or NoScale;
• an invalid scale position will default to NoScale.

See also: setScalePosition()

void QwtThermo::setPipeWidth (int width)

Change the width of the pipe.

Parameters:

• width — Width of the pipe

See also: pipeWidth()

void QwtThermo::setRange (double vmin, double vmax, bool logarithmic = false)

Set the range.

Parameters:

• vmin — value corresponding lower or left end of the thermometer
• vmax — value corresponding to the upper or right end of the thermometer
• logarithmic — logarithmic mapping, true or false

void QwtThermo::setScaleDraw (QwtScaleDraw *scaleDraw)

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().

she owns it now. you hand it over, she handles the cleanup. that's the deal 💅

void QwtThermo::setScalePosition (ScalePos scalePos)

Change the scale position (and thermometer orientation).

Parameters:

• scalePos — Position of the scale.

A valid combination of scale position and orientation is enforced:

• if the new scale position is LeftScale or RightScale, the scale orientation will become Qt::Vertical;
• if the new scale position is BottomScale or TopScale, the scale orientation will become Qt::Horizontal;
• if the new scale position is NoScale, the scale orientation will not change.

See also: setOrientation(), scalePosition()

void QwtThermo::setValue (double value) [slot]

Set the current value.

Parameters:

• value — New Value

See also: value()

QSize QwtThermo::sizeHint () const [virtual]

Returns:

• the minimum size hint

See also: minimumSizeHint()

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🌟 Author 🌟

Generated automatically by Doxygen for Qwt User's Guide from the source code. (the robots wrote it, I just gave it a glow-up ✨🤖)

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okay that's the whole page bestie, no cap, every flag and every function accounted for 💖 this was Version 5.2.3 of the Qwt User's Guide, dated Tue Nov 20 2012 — stay hydrated, stay thermoregulated, and go read QwtThermo(3) again if you forgot something 🎀🦋💅