NAME¶

QwtDial -

SYNOPSIS¶

#include <qwt_dial.h> Inherits QwtAbstractSlider. Inherited by QwtAnalogClock, and QwtCompass.

Public Types¶

enum Direction { Clockwise, CounterClockwise } enum Mode { RotateNeedle, RotateScale } enum ScaleOptions { ScaleBackbone = 1, ScaleTicks = 2, ScaleLabel = 4 } enum Shadow { Plain = QFrame::Plain, Raised = QFrame::Raised, Sunken = QFrame::Sunken }

Public Member Functions¶

QwtDial (QWidget *parent=NULL) virtual ~QwtDial () QRect boundingRect () const QRect contentsRect () const Direction direction () const Shadow frameShadow () const bool hasVisibleBackground () const int lineWidth () const double maxScaleArc () const virtual QSize minimumSizeHint () const double minScaleArc () const Mode mode () const const QwtDialNeedle * needle () const QwtDialNeedle * needle () double origin () const virtual QRect scaleContentsRect () const QwtDialScaleDraw * scaleDraw () const QwtDialScaleDraw * scaleDraw () const void setDirection (Direction) void setFrameShadow (Shadow) void setLineWidth (int) void setMode (Mode) virtual void setNeedle (QwtDialNeedle *) virtual void setOrigin (double) virtual void setScale (int maxMajIntv, int maxMinIntv, double step=0.0) void setScaleArc (double min, double max) virtual void setScaleDraw (QwtDialScaleDraw *) void setScaleOptions (int) void setScaleTicks (int minLen, int medLen, int majLen, int penWidth=1) virtual void setWrapping (bool) void showBackground (bool) virtual QSize sizeHint () const bool wrapping () const

Protected Member Functions¶

virtual void drawContents (QPainter *) const virtual void drawFocusIndicator (QPainter *) const virtual void drawFrame (QPainter *p) virtual void drawNeedle (QPainter *, const QPoint &, int radius, double direction, QPalette::ColorGroup) const virtual void drawScale (QPainter *, const QPoint &center, int radius, double origin, double arcMin, double arcMax) const virtual void drawScaleContents (QPainter *painter, const QPoint &center, int radius) const virtual void getScrollMode (const QPoint &, int &scrollMode, int & direction) virtual double getValue (const QPoint &) virtual void keyPressEvent (QKeyEvent *) virtual void paintEvent (QPaintEvent *) virtual void rangeChange () virtual void resizeEvent (QResizeEvent *) virtual QwtText scaleLabel (double) const virtual void updateMask () void updateScale () virtual void valueChange ()

Friends¶

class QwtDialScaleDraw

Additional Inherited Members¶

Detailed Description¶

QwtDial class provides a rounded range control. QwtDial is intended as base class for dial widgets like speedometers, compass widgets, clocks ... A dial contains a scale and a needle indicating the current value of the dial. Depending on Mode one of them is fixed and the other is rotating. If not isReadOnly() the dial can be rotated by dragging the mouse or using keyboard inputs (see keyPressEvent()). A dial might be wrapping, what means a rotation below/above one limit continues on the other limit (f.e compass). The scale might cover any arc of the dial, its values are related to the origin() of the dial. Qwt is missing a set of good looking needles ( QwtDialNeedle). Contributions are very welcome. See also: Note:

Member Enumeration Documentation¶

enum QwtDial::Direction¶

Direction of the dial

enum QwtDial::Mode¶

In case of RotateNeedle the needle is rotating, in case of RotateScale, the needle points to origin() and the scale is rotating.

enum QwtDial::Shadow¶

Frame shadow. Unfortunately it is not possible to use QFrame::Shadow as a property of a widget that is not derived from QFrame. The following enum is made for the designer only. It is safe to use QFrame::Shadow instead.

Constructor & Destructor Documentation¶

QwtDial::QwtDial (QWidget *parent = NULL) [explicit]¶

Constructor. Parameters: Create a dial widget with no scale and no needle. The default origin is 90.0 with no valid value. It accepts mouse and keyboard inputs and has no step size. The default mode is QwtDial::RotateNeedle.

Member Function Documentation¶

QRect QwtDial::boundingRect () const¶

Returns: See also:

QRect QwtDial::contentsRect () const¶

Returns: See also:

QwtDial::Direction QwtDial::direction () const¶

Returns: The default direction of a dial is QwtDial::Clockwise See also:

void QwtDial::drawContents (QPainter *painter) const [protected], [virtual]¶

Draw the contents inside the frame. QColorGroup::Background is the background color outside of the frame. QColorGroup::Base is the background color inside the frame. QColorGroup::Foreground is the background color inside the scale. Parameters: See also:

void QwtDial::drawFocusIndicator (QPainter *painter) const [protected], [virtual]¶

Draw a dotted round circle, if !isReadOnly() Parameters:

void QwtDial::drawFrame (QPainter *painter) [protected], [virtual]¶

Draw the frame around the dial Parameters: See also:

void QwtDial::drawNeedle (QPainter *painter, const QPoint &center, intradius, doubledirection, QPalette::ColorGroupcg) const [protected], [virtual]¶

Draw the needle Parameters: Reimplemented in QwtAnalogClock.

void QwtDial::drawScale (QPainter *painter, const QPoint &center, intradius, doubleorigin, doubleminArc, doublemaxArc) const [protected], [virtual]¶

Draw the scale Parameters: See also:

void QwtDial::drawScaleContents (QPainter *painter, const QPoint &center, intradius) const [protected], [virtual]¶

Draw the contents inside the scale Paints nothing. Parameters: Reimplemented in QwtCompass.

QwtDial::Shadow QwtDial::frameShadow () const¶

Returns:

void QwtDial::getScrollMode (const QPoint &pos, int &scrollMode, int &direction) [protected], [virtual]¶

See QwtAbstractSlider::getScrollMode() Parameters: Return values: See also: Implements QwtAbstractSlider.

double QwtDial::getValue (const QPoint &pos) [protected], [virtual]¶

Find the value for a given position Parameters: Returns: Implements QwtAbstractSlider.

bool QwtDial::hasVisibleBackground () const¶

true when the area outside of the frame is visible See also:

void QwtDial::keyPressEvent (QKeyEvent *event) [protected], [virtual]¶

Handles key events

•

Key_Down, KeyLeft

 

Decrement by 1

•

Key_Prior

 

Decrement by pageSize()

•

Key_Home

 

Set the value to minValue()

•

Key_Up, KeyRight

 

Increment by 1

•

Key_Next

 

Increment by pageSize()

•

Key_End

 

Set the value to maxValue()

Parameters: See also: Reimplemented from QwtAbstractSlider. Reimplemented in QwtCompass.

int QwtDial::lineWidth () const¶

Returns: See also:

double QwtDial::maxScaleArc () const¶

Returns:

QSize QwtDial::minimumSizeHint () const [virtual]¶

Return a minimum size hint. Warning:

double QwtDial::minScaleArc () const¶

Returns:

QwtDial::Mode QwtDial::mode () const¶

Returns: The value of the dial is indicated by the difference between the origin and the direction of the needle. In case of QwtDial::RotateNeedle the scale arc is fixed to the origin() and the needle is rotating, in case of QwtDial::RotateScale, the needle points to origin() and the scale is rotating. The default mode is QwtDial::RotateNeedle. See also:

const QwtDialNeedle * QwtDial::needle () const¶

Returns: See also:

QwtDialNeedle * QwtDial::needle ()¶

Returns: See also:

double QwtDial::origin () const¶

The origin is the angle where scale and needle is relative to. Returns: See also:

void QwtDial::paintEvent (QPaintEvent *e) [protected], [virtual]¶

Paint the dial Parameters:

void QwtDial::resizeEvent (QResizeEvent *e) [protected], [virtual]¶

Resize the dial widget Parameters:

QRect QwtDial::scaleContentsRect () const [virtual]¶

Returns: See also:

QwtText QwtDial::scaleLabel (doublevalue) const [protected], [virtual]¶

Find the label for a value Parameters: Returns: Reimplemented in QwtAnalogClock, and QwtCompass.

void QwtDial::setDirection ( Directiondirection)¶

Set the direction of the dial (clockwise/counterclockwise) Direction direction See also:

void QwtDial::setFrameShadow ( Shadowshadow)¶

Sets the frame shadow value from the frame style. Parameters: See also:

void QwtDial::setLineWidth (intlineWidth)¶

Sets the line width Parameters: See also:

void QwtDial::setMode ( Modemode)¶

Change the mode of the meter. Parameters: The value of the meter is indicated by the difference between north of the scale and the direction of the needle. In case of QwtDial::RotateNeedle north is pointing to the origin() and the needle is rotating, in case of QwtDial::RotateScale, the needle points to origin() and the scale is rotating. The default mode is QwtDial::RotateNeedle. See also:

void QwtDial::setNeedle ( QwtDialNeedle *needle) [virtual]¶

Set a needle for the dial Qwt is missing a set of good looking needles. Contributions are very welcome. Parameters: Warning:

void QwtDial::setOrigin (doubleorigin) [virtual]¶

Change the origin. The origin is the angle where scale and needle is relative to. Parameters: See also:

void QwtDial::setScale (intmaxMajIntv, intmaxMinIntv, doublestep = 0.0) [virtual]¶

Change the intervals of the scale See also:

void QwtDial::setScaleArc (doubleminArc, doublemaxArc)¶

Change the arc of the scale Parameters:

void QwtDial::setScaleDraw ( QwtDialScaleDraw *scaleDraw) [virtual]¶

Set an individual scale draw Parameters: Warning:

void QwtDial::setScaleOptions (intoptions)¶

A wrapper method for accessing the scale draw.

•

options == 0

 

No visible scale: setScaleDraw(NULL)

•

options & ScaleBackbone

 

En/disable the backbone of the scale.

•

options & ScaleTicks

 

En/disable the ticks of the scale.

•

options & ScaleLabel

 

En/disable scale labels

See also:

void QwtDial::setScaleTicks (intminLen, intmedLen, intmajLen, intpenWidth = 1)¶

Assign length and width of the ticks Parameters: See also:

void QwtDial::setWrapping (boolwrapping) [virtual]¶

Sets whether it is possible to step the value from the highest value to the lowest value and vice versa to on. Parameters: See also: Note:

void QwtDial::showBackground (boolshow)¶

Show/Hide the area outside of the frame Parameters: See also: Warning:

QSize QwtDial::sizeHint () const [virtual]¶

Returns:

void QwtDial::updateMask () [protected], [virtual]¶

Update the mask of the dial. In case of 'hasVisibleBackground() == false', the backgound is transparent by a mask. See also:

void QwtDial::updateScale () [protected]¶

Update the scale with the current attributes See also:

bool QwtDial::wrapping () const¶

wrapping() holds whether it is possible to step the value from the highest value to the lowest value and vice versa. See also: Note:

Author¶

Generated automatically by Doxygen for Qwt User's Guide from the source code.