| Qwt User's Guide
    6.1.3
    | 
A Compass Widget. More...
#include <qwt_compass.h>

| Public Member Functions | |
| QwtCompass (QWidget *parent=NULL) | |
| Constructor.  More... | |
| virtual | ~QwtCompass () | 
| Destructor. | |
| void | setRose (QwtCompassRose *rose) | 
| const QwtCompassRose * | rose () const | 
| QwtCompassRose * | rose () | 
|  Public Member Functions inherited from QwtDial | |
| QwtDial (QWidget *parent=NULL) | |
| Constructor.  More... | |
| virtual | ~QwtDial () | 
| Destructor. | |
| void | setFrameShadow (Shadow) | 
| Shadow | frameShadow () const | 
| void | setLineWidth (int) | 
| int | lineWidth () const | 
| void | setMode (Mode) | 
| Change the mode of the dial.  More... | |
| Mode | mode () const | 
| void | setScaleArc (double min, double max) | 
| void | setMinScaleArc (double min) | 
| double | minScaleArc () const | 
| void | setMaxScaleArc (double min) | 
| double | maxScaleArc () const | 
| virtual void | setOrigin (double) | 
| Change the origin.  More... | |
| double | origin () const | 
| void | setNeedle (QwtDialNeedle *) | 
| const QwtDialNeedle * | needle () const | 
| QwtDialNeedle * | needle () | 
| QRect | boundingRect () const | 
| QRect | innerRect () const | 
| virtual QRect | scaleInnerRect () const | 
| virtual QSize | sizeHint () const | 
| virtual QSize | minimumSizeHint () const | 
| void | setScaleDraw (QwtRoundScaleDraw *) | 
| QwtRoundScaleDraw * | scaleDraw () | 
| const QwtRoundScaleDraw * | scaleDraw () const | 
|  Public Member Functions inherited from QwtAbstractSlider | |
| QwtAbstractSlider (QWidget *parent=NULL) | |
| Constructor.  More... | |
| virtual | ~QwtAbstractSlider () | 
| Destructor. | |
| void | setValid (bool) | 
| bool | isValid () const | 
| double | value () const | 
| Returns the current value. | |
| void | setWrapping (bool) | 
| bool | wrapping () const | 
| void | setTotalSteps (uint) | 
| Set the number of steps.  More... | |
| uint | totalSteps () const | 
| void | setSingleSteps (uint) | 
| Set the number of steps for a single increment.  More... | |
| uint | singleSteps () const | 
| void | setPageSteps (uint) | 
| Set the number of steps for a page increment.  More... | |
| uint | pageSteps () const | 
| void | setStepAlignment (bool) | 
| Enable step alignment.  More... | |
| bool | stepAlignment () const | 
| void | setTracking (bool) | 
| Enables or disables tracking.  More... | |
| bool | isTracking () const | 
| void | setReadOnly (bool) | 
| bool | isReadOnly () const | 
| void | setInvertedControls (bool) | 
| bool | invertedControls () const | 
|  Public Member Functions inherited from QwtAbstractScale | |
| QwtAbstractScale (QWidget *parent=NULL) | |
| virtual | ~QwtAbstractScale () | 
| Destructor. | |
| void | setScale (double lowerBound, double upperBound) | 
| Specify a scale.  More... | |
| void | setScale (const QwtInterval &) | 
| Specify a scale.  More... | |
| void | setScale (const QwtScaleDiv &) | 
| Specify a scale.  More... | |
| const QwtScaleDiv & | scaleDiv () const | 
| void | setLowerBound (double value) | 
| double | lowerBound () const | 
| void | setUpperBound (double value) | 
| double | upperBound () const | 
| void | setScaleStepSize (double stepSize) | 
| Set the step size used for calculating a scale division.  More... | |
| double | scaleStepSize () const | 
| void | setScaleMaxMajor (int ticks) | 
| Set the maximum number of major tick intervals.  More... | |
| int | scaleMaxMinor () const | 
| void | setScaleMaxMinor (int ticks) | 
| Set the maximum number of minor tick intervals.  More... | |
| int | scaleMaxMajor () const | 
| void | setScaleEngine (QwtScaleEngine *) | 
| Set a scale engine.  More... | |
| const QwtScaleEngine * | scaleEngine () const | 
| QwtScaleEngine * | scaleEngine () | 
| int | transform (double) const | 
| double | invTransform (int) const | 
| bool | isInverted () const | 
| double | minimum () const | 
| double | maximum () const | 
| const QwtScaleMap & | scaleMap () const | 
| Protected Member Functions | |
| virtual void | drawRose (QPainter *, const QPointF ¢er, double radius, double north, QPalette::ColorGroup) const | 
| virtual void | drawScaleContents (QPainter *, const QPointF ¢er, double radius) const | 
| virtual void | keyPressEvent (QKeyEvent *) | 
|  Protected Member Functions inherited from QwtDial | |
| virtual void | wheelEvent (QWheelEvent *) | 
| virtual void | paintEvent (QPaintEvent *) | 
| virtual void | changeEvent (QEvent *) | 
| virtual void | drawFrame (QPainter *p) | 
| virtual void | drawContents (QPainter *) const | 
| Draw the contents inside the frame.  More... | |
| virtual void | drawFocusIndicator (QPainter *) const | 
| void | invalidateCache () | 
| virtual void | drawScale (QPainter *, const QPointF ¢er, double radius) const | 
| virtual void | drawNeedle (QPainter *, const QPointF &, double radius, double direction, QPalette::ColorGroup) const | 
| virtual double | scrolledTo (const QPoint &) const | 
| Determine the value for a new position of the slider handle.  More... | |
| virtual bool | isScrollPosition (const QPoint &) const | 
| Determine what to do when the user presses a mouse button.  More... | |
| virtual void | sliderChange () | 
| Calling update() | |
| virtual void | scaleChange () | 
|  Protected Member Functions inherited from QwtAbstractSlider | |
| virtual void | mousePressEvent (QMouseEvent *) | 
| virtual void | mouseReleaseEvent (QMouseEvent *) | 
| virtual void | mouseMoveEvent (QMouseEvent *) | 
| void | incrementValue (int numSteps) | 
| double | incrementedValue (double value, int stepCount) const | 
|  Protected Member Functions inherited from QwtAbstractScale | |
| void | rescale (double lowerBound, double upperBound, double stepSize) | 
| void | setAbstractScaleDraw (QwtAbstractScaleDraw *) | 
| Set a scale draw.  More... | |
| const QwtAbstractScaleDraw * | abstractScaleDraw () const | 
| QwtAbstractScaleDraw * | abstractScaleDraw () | 
| Additional Inherited Members | |
|  Public Types inherited from QwtDial | |
| enum | Shadow { Plain = QFrame::Plain, Raised = QFrame::Raised, Sunken = QFrame::Sunken } | 
| Frame shadow.  More... | |
| enum | Mode { RotateNeedle, RotateScale } | 
| Mode controlling whether the needle or the scale is rotating.  More... | |
|  Public Slots inherited from QwtAbstractSlider | |
| void | setValue (double val) | 
|  Signals inherited from QwtAbstractSlider | |
| void | valueChanged (double value) | 
| Notify a change of value.  More... | |
| void | sliderPressed () | 
| void | sliderReleased () | 
| void | sliderMoved (double value) | 
A Compass Widget.
QwtCompass is a widget to display and enter directions. It consists of a scale, an optional needle and rose.
 
| 
 | explicit | 
Constructor.
| parent | Parent widget | 
Create a compass widget with a scale, no needle and no rose. The default origin is 270.0 with no valid value. It accepts mouse and keyboard inputs and has no step size. The default mode is QwtDial::RotateNeedle.
| 
 | protectedvirtual | 
Draw the compass rose
| painter | Painter | 
| center | Center of the compass | 
| radius | of the circle, where to paint the rose | 
| north | Direction pointing north, in degrees counter clockwise | 
| cg | Color group | 
| 
 | protectedvirtual | 
Draw the contents of the scale
| painter | Painter | 
| center | Center of the content circle | 
| radius | Radius of the content circle | 
Reimplemented from QwtDial.
| 
 | protectedvirtual | 
Handles key events
Beside the keys described in QwtDial::keyPressEvent numbers from 1-9 (without 5) set the direction according to their position on the num pad.
Reimplemented from QwtAbstractSlider.
| const QwtCompassRose * QwtCompass::rose | ( | ) | const | 
| QwtCompassRose * QwtCompass::rose | ( | ) | 
| void QwtCompass::setRose | ( | QwtCompassRose * | rose | ) | 
Set a rose for the compass
| rose | Compass rose |