conflicting packages
QwtThermo(3) | Qwt User's Guide | QwtThermo(3) |
NAME¶
QwtThermo -SYNOPSIS¶
#include <qwt_thermo.h> Inherits QwtAbstractScale.Public Types¶
enum ScalePos { NoScale, LeftScale, RightScale, TopScale, BottomScale }
Public Slots¶
void setValue (double val)
Public Member Functions¶
QwtThermo (QWidget *parent=NULL)
Protected Member Functions¶
void draw (QPainter *p, const QRect &update_rect)
Detailed Description¶
The Thermometer Widget. 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.
#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(); }
Constructor & Destructor Documentation¶
QwtThermo::QwtThermo (QWidget *parent = NULL) [explicit]¶
Constructor Parameters:parent Parent widget
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. Parameters:painter Painter
rect Update rectangle
void QwtThermo::drawThermo (QPainter *painter) [protected]¶
Redraw the liquid in thermometer pipe. 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 (boolupdate_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 eventint 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 (booltf)¶
Enable or disable the alarm threshold. Parameters:tf true (disabled) or false (enabled)
void QwtThermo::setAlarmLevel (doublelevel)¶
Specify the alarm threshold. Parameters:level Alarm threshold
See also:
alarmLevel()
void QwtThermo::setBorderWidth (intwidth)¶
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 (intm)¶
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.
void QwtThermo::setMaxValue (doublemax)¶
Set the maximum value. Parameters:max Maximum value
See also:
maxValue(), setMinValue()
void QwtThermo::setMinValue (doublemin)¶
Set the minimum value. Parameters:min Minimum value
See also:
minValue(), setMaxValue()
void QwtThermo::setOrientation (Qt::Orientationo, ScalePoss)¶
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.
setScalePosition()
void QwtThermo::setPipeWidth (intwidth)¶
Change the width of the pipe. Parameters:width Width of the pipe
See also:
pipeWidth()
void QwtThermo::setRange (doublevmin, doublevmax, boollogarithmic = 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().
void QwtThermo::setScalePosition (ScalePosscalePos)¶
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.
setOrientation(), scalePosition()
void QwtThermo::setValue (doublevalue) [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()
Author¶
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