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.TH "QwtWheel" 3 "11 Jun 2007" "Version 5.0.2" "Qwt User's Guide" \" -*- nroff -*-
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Inherits \fBQwtAbstractSlider\fP.
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.SH "Detailed Description"
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The wheel widget can be used to change values over a very large range in very small steps. Using the setMass member, it can be configured as a flywheel.
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Definition at line 25 of file qwt_wheel.h.
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.SS "Public Member Functions"
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.RI "\fBQwtWheel\fP (QWidget *parent=NULL)"
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.RI "virtual \fB~QwtWheel\fP ()"
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.RI "virtual void \fBsetOrientation\fP (Qt::Orientation)"
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.RI "double \fBtotalAngle\fP () const "
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.RI "double \fBviewAngle\fP () const "
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.RI "int \fBtickCnt\fP () const "
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.RI "int \fBinternalBorder\fP () const "
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.RI "double \fBmass\fP () const "
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.RI "void \fBsetTotalAngle\fP (double angle)"
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.RI "void \fBsetTickCnt\fP (int cnt)"
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.RI "void \fBsetViewAngle\fP (double angle)"
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.RI "void \fBsetInternalBorder\fP (int width)"
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.RI "void \fBsetMass\fP (double val)"
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.RI "void \fBsetWheelWidth\fP (int w)"
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.RI "virtual QSize \fBsizeHint\fP () const "
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.RI "virtual QSize \fBminimumSizeHint\fP () const "
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.SS "Protected Member Functions"
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.RI "virtual void \fBresizeEvent\fP (QResizeEvent *e)"
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.RI "virtual void \fBpaintEvent\fP (QPaintEvent *e)"
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.RI "void \fBlayoutWheel\fP (bool update=true)"
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.RI "void \fBdraw\fP (QPainter *p, const QRect &update_rect)"
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.RI "void \fBdrawWheel\fP (QPainter *p, const QRect &r)"
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.RI "void \fBdrawWheelBackground\fP (QPainter *p, const QRect &r)"
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.RI "void \fBsetColorArray\fP ()"
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.RI "virtual void \fBvalueChange\fP ()"
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.RI "virtual void \fBpaletteChange\fP (const QPalette &)"
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.RI "virtual double \fBgetValue\fP (const QPoint &p)"
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.RI "virtual void \fBgetScrollMode\fP (const QPoint &p, int &scrollMode, int &direction)"
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.SH "Constructor & Destructor Documentation"
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.SS "QwtWheel::QwtWheel (QWidget * parent = \fCNULL\fP)\fC [explicit]\fP"
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Definition at line 51 of file qwt_wheel.cpp.
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.SS "QwtWheel::~QwtWheel ()\fC [virtual]\fP"
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Definition at line 86 of file qwt_wheel.cpp.
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.SH "Member Function Documentation"
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.SS "void QwtWheel::draw (QPainter * p, const QRect & update_rect)\fC [protected]\fP"
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Redraw panel and wheel.
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Definition at line 564 of file qwt_wheel.cpp.
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References QwtPainter::drawFocusRect(), and drawWheel().
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Referenced by paintEvent().
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.SS "void QwtWheel::drawWheel (QPainter * p, const QRect & r)\fC [protected]\fP"
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\fIr\fP contents rectangle
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Definition at line 375 of file qwt_wheel.cpp.
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References drawWheelBackground(), QwtDoubleRange::maxValue(), QwtDoubleRange::minValue(), QwtAbstractSlider::orientation(), and QwtDoubleRange::value().
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Referenced by draw().
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.SS "void QwtWheel::drawWheelBackground (QPainter * p, const QRect & r)\fC [protected]\fP"
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Draw the Wheel's background gradient.
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Definition at line 197 of file qwt_wheel.cpp.
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References QwtAbstractSlider::orientation(), and setColorArray().
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Referenced by drawWheel().
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.SS "void QwtWheel::getScrollMode (const QPoint & p, int & scrollMode, int & direction)\fC [protected, virtual]\fP"
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Determine the scrolling mode and direction corresponding to a specified point.
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\fIscrollMode\fP scrolling mode
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\fIdirection\fP direction
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Implements \fBQwtAbstractSlider\fP.
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Definition at line 596 of file qwt_wheel.cpp.
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.SS "double QwtWheel::getValue (const QPoint & p)\fC [protected, virtual]\fP"
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Determine the value corresponding to a specified point.
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Implements \fBQwtAbstractSlider\fP.
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Definition at line 494 of file qwt_wheel.cpp.
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References QwtDoubleRange::maxValue(), QwtDoubleRange::minValue(), and QwtAbstractSlider::orientation().
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.SS "void QwtWheel::layoutWheel (bool update = \fCtrue\fP)\fC [protected]\fP"
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Recalculate the slider's geometry and layout based on.
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Definition at line 533 of file qwt_wheel.cpp.
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Referenced by resizeEvent(), setInternalBorder(), setOrientation(), and setWheelWidth().
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.SS "double QwtWheel::mass () const\fC [virtual]\fP"
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Reimplemented from \fBQwtAbstractSlider\fP.
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Definition at line 168 of file qwt_wheel.cpp.
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References QwtAbstractSlider::mass().
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.SS "QSize QwtWheel::minimumSizeHint () const\fC [virtual]\fP"
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Return a minimum size hint.
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The return value is based on the wheel width.
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Definition at line 642 of file qwt_wheel.cpp.
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References QwtAbstractSlider::orientation().
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Referenced by sizeHint().
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.SS "void QwtWheel::paintEvent (QPaintEvent * e)\fC [protected, virtual]\fP"
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Definition at line 547 of file qwt_wheel.cpp.
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.SS "void QwtWheel::paletteChange (const QPalette &)\fC [protected, virtual]\fP"
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Call update() when the palette changes.
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Definition at line 654 of file qwt_wheel.cpp.
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.SS "void QwtWheel::resizeEvent (QResizeEvent * e)\fC [protected, virtual]\fP"
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Definition at line 524 of file qwt_wheel.cpp.
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References layoutWheel().
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.SS "void QwtWheel::setColorArray ()\fC [protected]\fP"
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Set up the color array for the background pixmap.
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Definition at line 96 of file qwt_wheel.cpp.
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Referenced by drawWheelBackground().
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.SS "void QwtWheel::setInternalBorder (int w)"
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Set the internal border width of the wheel.
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The internal border must not be smaller than 1 and is limited in dependence on the wheel's size. Values outside the allowed range will be clipped.
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The internal border defaults to 2.
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Definition at line 183 of file qwt_wheel.cpp.
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References layoutWheel().
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.SS "void QwtWheel::setMass (double val)\fC [virtual]\fP"
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Set the mass of the wheel.
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Assigning a mass turns the wheel into a flywheel.
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\fIval\fP the wheel's mass
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Reimplemented from \fBQwtAbstractSlider\fP.
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Definition at line 612 of file qwt_wheel.cpp.
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References QwtAbstractSlider::setMass().
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.SS "void QwtWheel::setOrientation (Qt::Orientation o)\fC [virtual]\fP"
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Set the wheel's orientation.
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\fIo\fP Orientation. Allowed values are Qt::Horizontal and Qt::Vertical. Defaults to Qt::Horizontal.
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\fBQwtAbstractSlider::orientation()\fP
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Reimplemented from \fBQwtAbstractSlider\fP.
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Definition at line 325 of file qwt_wheel.cpp.
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References layoutWheel(), QwtAbstractSlider::orientation(), and QwtAbstractSlider::setOrientation().
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.SS "void QwtWheel::setTickCnt (int cnt)"
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Adjust the number of grooves in the wheel's surface.
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The number of grooves is limited to 6 <= cnt <= 50. Values outside this range will be clipped. The default value is 10.
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\fIcnt\fP Number of grooves per 360 degrees
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Definition at line 154 of file qwt_wheel.cpp.
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.SS "void QwtWheel::setTotalAngle (double angle)"
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Set the total angle which the wheel can be turned.
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One full turn of the wheel corresponds to an angle of 360 degrees. A total angle of n*360 degrees means that the wheel has to be turned n times around its axis to get from the minimum value to the maximum value.
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The default setting of the total angle is 360 degrees.
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\fIangle\fP total angle in degrees
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Definition at line 304 of file qwt_wheel.cpp.
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.SS "void QwtWheel::setViewAngle (double angle)"
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Specify the visible portion of the wheel.
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You may use this function for fine-tuning the appearance of the wheel. The default value is 175 degrees. The value is limited from 10 to 175 degrees.
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\fIangle\fP Visible angle in degrees
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Definition at line 359 of file qwt_wheel.cpp.
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.SS "void QwtWheel::setWheelWidth (int w)"
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Set the width of the wheel.
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Corresponds to the wheel height for horizontal orientation, and the wheel width for vertical orientation.
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\fIw\fP the wheel's width
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Definition at line 624 of file qwt_wheel.cpp.
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References layoutWheel().
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.SS "QSize QwtWheel::sizeHint () const\fC [virtual]\fP"
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Definition at line 633 of file qwt_wheel.cpp.
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References minimumSizeHint().
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.SS "void QwtWheel::valueChange ()\fC [protected, virtual]\fP"
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Reimplemented from \fBQwtAbstractSlider\fP.
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Definition at line 582 of file qwt_wheel.cpp.
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References QwtAbstractSlider::valueChange().
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qwt-5.0.2/doc/man/man3/QwtWheel.3
