#include <qwt_thermo.h>
Public Types | |
enum | ScalePos { NoScale, LeftScale, RightScale, TopScale, BottomScale } |
Public Slots | |
void | setValue (double val) |
Public Member Functions | |
QwtThermo (QWidget *parent=NULL) | |
virtual | ~QwtThermo () |
void | setOrientation (Qt::Orientation o, ScalePos s) |
void | setScalePosition (ScalePos s) |
ScalePos | scalePosition () const |
void | setBorderWidth (int w) |
int | borderWidth () const |
void | setFillBrush (const QBrush &b) |
const QBrush & | fillBrush () const |
void | setFillColor (const QColor &c) |
const QColor & | fillColor () const |
void | setAlarmBrush (const QBrush &b) |
const QBrush & | alarmBrush () const |
void | setAlarmColor (const QColor &c) |
const QColor & | alarmColor () const |
void | setAlarmLevel (double v) |
double | alarmLevel () const |
void | setAlarmEnabled (bool tf) |
bool | alarmEnabled () const |
void | setPipeWidth (int w) |
int | pipeWidth () const |
void | setMaxValue (double v) |
double | maxValue () const |
void | setMinValue (double v) |
double | minValue () const |
double | value () const |
void | setRange (double vmin, double vmax, bool lg=false) |
void | setMargin (int m) |
virtual QSize | sizeHint () const |
virtual QSize | minimumSizeHint () const |
void | setScaleDraw (QwtScaleDraw *) |
const QwtScaleDraw * | scaleDraw () const |
Protected Member Functions | |
void | draw (QPainter *p, const QRect &update_rect) |
void | drawThermo (QPainter *p) |
void | layoutThermo (bool update=true) |
virtual void | scaleChange () |
virtual void | fontChange (const QFont &oldFont) |
virtual void | paintEvent (QPaintEvent *e) |
virtual void | resizeEvent (QResizeEvent *e) |
QwtScaleDraw * | scaleDraw () |
QwtThermo is a widget which displays a value in an interval. It supports:
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.
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(); }
QwtThermo::QwtThermo | ( | QWidget * | parent = NULL |
) | [explicit] |
Constructor
parent | Parent widget |
QwtThermo::~QwtThermo | ( | ) | [virtual] |
Destructor.
const QBrush & QwtThermo::alarmBrush | ( | ) | const |
Return the liquid brush above the alarm threshold.
const QColor & QwtThermo::alarmColor | ( | ) | const |
Return the liquid color above the alarm threshold.
bool QwtThermo::alarmEnabled | ( | ) | const |
Return if the alarm threshold is enabled or disabled.
double QwtThermo::alarmLevel | ( | ) | const |
Return the alarm threshold.
int QwtThermo::borderWidth | ( | ) | const |
Return the border width of the thermometer pipe.
void QwtThermo::draw | ( | QPainter * | painter, | |
const QRect & | rect | |||
) | [protected] |
void QwtThermo::drawThermo | ( | QPainter * | painter | ) | [protected] |
Redraw the liquid in thermometer pipe.
painter | Painter |
const QBrush & QwtThermo::fillBrush | ( | ) | const |
Return the liquid brush.
const QColor & QwtThermo::fillColor | ( | ) | const |
Return the liquid color.
void QwtThermo::fontChange | ( | const QFont & | oldFont | ) | [protected, virtual] |
Notify a font change.
void QwtThermo::layoutThermo | ( | bool | update_geometry = true |
) | [protected] |
Recalculate the QwtThermo geometry and layout based on the QwtThermo::rect() and the fonts.
update_geometry | notify the layout system and call update to redraw the scale |
double QwtThermo::maxValue | ( | ) | const |
Return the maximum value.
QSize QwtThermo::minimumSizeHint | ( | ) | const [virtual] |
Return a minimum size hint.
double QwtThermo::minValue | ( | ) | const |
Return the minimum value.
void QwtThermo::paintEvent | ( | QPaintEvent * | event | ) | [protected, virtual] |
Qt paint event. event Paint event
int QwtThermo::pipeWidth | ( | ) | const |
Return the width of the pipe.
void QwtThermo::resizeEvent | ( | QResizeEvent * | e | ) | [protected, virtual] |
Qt resize event handler.
void QwtThermo::scaleChange | ( | ) | [protected, virtual] |
QwtScaleDraw * QwtThermo::scaleDraw | ( | ) | [protected] |
const QwtScaleDraw * QwtThermo::scaleDraw | ( | ) | const |
QwtThermo::ScalePos QwtThermo::scalePosition | ( | ) | const |
Return the scale position.
void QwtThermo::setAlarmBrush | ( | const QBrush & | brush | ) |
Specify the liquid brush above the alarm threshold.
brush | New brush. The default is solid white. |
void QwtThermo::setAlarmColor | ( | const QColor & | c | ) |
Specify the liquid color above the alarm threshold.
c | New color. The default is white. |
void QwtThermo::setAlarmEnabled | ( | bool | tf | ) |
Enable or disable the alarm threshold.
tf | true (disabled) or false (enabled) |
void QwtThermo::setAlarmLevel | ( | double | level | ) |
void QwtThermo::setBorderWidth | ( | int | width | ) |
void QwtThermo::setFillBrush | ( | const QBrush & | brush | ) |
Change the brush of the liquid.
brush | New brush. The default brush is solid black. |
void QwtThermo::setFillColor | ( | const QColor & | c | ) |
Change the color of the liquid.
c | New color. The default color is black. |
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.
m | New Margin. The default values are 10 for horizontal orientation and 20 for vertical orientation. |
This function is a NOOP because margins are determined automatically.
void QwtThermo::setMaxValue | ( | double | max | ) |
void QwtThermo::setMinValue | ( | double | min | ) |
void QwtThermo::setOrientation | ( | Qt::Orientation | o, | |
ScalePos | s | |||
) |
Set the thermometer orientation and the scale position.
The scale position NoScale disables the scale.
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. |
void QwtThermo::setPipeWidth | ( | int | width | ) |
void QwtThermo::setRange | ( | double | vmin, | |
double | vmax, | |||
bool | logarithmic = false | |||
) |
Set the range.
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().
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 | ( | ScalePos | scalePos | ) |
Change the scale position (and thermometer orientation).
scalePos | Position of the scale. |
void QwtThermo::setValue | ( | double | value | ) | [slot] |
QSize QwtThermo::sizeHint | ( | ) | const [virtual] |
double QwtThermo::value | ( | ) | const |
Return the value.