qwtwheel.3

软件无线电的平台

.TH "QwtWheel" 3 "4 Nov 2003" "Qwt User's Guide" \" -*- nroff -*-
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.SH NAME
QwtWheel \- 
.SH SYNOPSIS
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.PP
Inherits \fBQwtSliderBase\fP.
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.SH "Detailed Description"
.PP 
The Wheel Widget. 

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.
.PP
\fBSee also:\fP
.RS 4
The radio example. 
.RE
.PP

.PP
.SS "Public Member Functions"

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.RI "\fBQwtWheel\fP (QWidget *parent=0, const  char *name=0)"
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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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.RI "virtual QSizePolicy \fBsizePolicy\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"
.PP 
.SS "QwtWheel::QwtWheel (QWidget * parent = 0, const char * name = 0)"
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Constructor. 
.SS "QwtWheel::~\fBQwtWheel\fP ()\fC [virtual]\fP"
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Destructor. 
.SH "Member Function Documentation"
.PP 
.SS "void QwtWheel::draw (QPainter * p, const QRect & update_rect)\fC [protected]\fP"
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Redraw panel and wheel. 
.SS "void QwtWheel::drawWheel (QPainter * p, const QRect & r)\fC [protected]\fP"
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Redraw the wheel. \fBParameters:\fP
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\fIp\fP painter 
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\fIr\fP contents rectangle 
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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. 
.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. \fBParameters:\fP
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\fIp\fP point 
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\fIscrollMode\fP scrolling mode 
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\fIdirection\fP direction 
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Implements \fBQwtSliderBase\fP.
.SS "double QwtWheel::getValue (const QPoint & p)\fC [protected, virtual]\fP"
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Determine the value corresponding to a specified point. Implements \fBQwtSliderBase\fP.
.SS "void QwtWheel::layoutWheel (bool update = TRUE)\fC [protected]\fP"
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Recalculate the slider's geometry and layout based on. 
.SS "double QwtWheel::mass () const\fC [virtual]\fP"
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\fBReturns:\fP
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mass 
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Reimplemented from \fBQwtSliderBase\fP.
.SS "QSize QwtWheel::minimumSizeHint () const\fC [virtual]\fP"
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Return a minimum size hint. \fBWarning:\fP
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The return value is based on the wheel width. 
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.SS "void QwtWheel::paintEvent (QPaintEvent * e)\fC [protected, virtual]\fP"
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Qt Paint Event. 
.SS "void QwtWheel::paletteChange (const QPalette &)\fC [protected, virtual]\fP"
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Call update() when the palette changes. 
.SS "void QwtWheel::resizeEvent (QResizeEvent * e)\fC [protected, virtual]\fP"
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Qt Resize Event. 
.SS "void QwtWheel::setColorArray ()\fC [protected]\fP"
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Set up the color array for the background pixmap. 
.SS "void QwtWheel::setInternalBorder (int w)"
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Set the internal border width of the wheel. 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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\fBParameters:\fP
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\fIw\fP border width 
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.SS "void QwtWheel::setMass (double val)\fC [virtual]\fP"
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Set the mass of the wheel. Assigning a mass turns the wheel into a flywheel. 
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\fBParameters:\fP
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\fIval\fP the wheel's mass 
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Reimplemented from \fBQwtSliderBase\fP.
.SS "void QwtWheel::setOrientation (Qt::Orientation o)\fC [virtual]\fP"
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Set the wheel's orientation. \fBParameters:\fP
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\fIo\fP Orientation. Allowed values are Qt::Horizontal and Qt::Vertical. Defaults to Qt::Horizontal. 
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\fBSee also:\fP
.RS 4
\fBQwtSliderBase::orientation()\fP 
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.SS "void QwtWheel::setTickCnt (int cnt)"
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Adjust the number of grooves in the wheel's surface. 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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\fBParameters:\fP
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\fIcnt\fP Number of grooves per 360 degrees 
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.SS "void QwtWheel::setTotalAngle (double angle)"
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Set the total angle which the wheel can be turned. 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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\fBParameters:\fP
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\fIangle\fP total angle in degrees 
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.SS "void QwtWheel::setViewAngle (double angle)"
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Specify the visible portion of the wheel. 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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\fBParameters:\fP
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\fIangle\fP Visible angle in degrees 
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.SS "void QwtWheel::setWheelWidth (int w)"
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Set the width of the wheel. Corresponds to the wheel height for horizontal orientation, and the wheel width for vertical orientation. 
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\fBParameters:\fP
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\fIw\fP the wheel's width 
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.SS "QSize QwtWheel::sizeHint () const\fC [virtual]\fP"
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\fBReturns:\fP
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a size hint 
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.SS "QSizePolicy QwtWheel::sizePolicy () const\fC [virtual]\fP"
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\fBReturns:\fP
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Preferred/Fixed for horizontal, Fixed/Preferred for vertical scales. 
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.SS "void QwtWheel::valueChange ()\fC [protected, virtual]\fP"
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Notify value change. Reimplemented from \fBQwtSliderBase\fP.

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