qwtscaleif.3

linux下qt的第三方的一个类

.TH "QwtScaleIf" 3 "16 Nov 2004" "Version 4.2.0" "Qwt User's Guide" \" -*- nroff -*-
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.SH NAME
QwtScaleIf \- 
.SH SYNOPSIS
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.PP
Inherited by \fBQwtKnob\fP, \fBQwtSlider\fP, and \fBQwtThermo\fP.
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.SH "Detailed Description"
.PP 
An interface class for widgets containing a scale. 

This interface class is used to provide classes a \fBQwtScaleDraw\fP and an interface to access that scale. 
.PP
Definition at line 40 of file qwt_sclif.h.
.SS "Public Member Functions"

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.RI "\fBQwtScaleIf\fP ()"
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.RI "virtual \fB~QwtScaleIf\fP ()"
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.RI "void \fBsetScale\fP (double vmin, double vmax, int logarithmic=0)"
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.RI "void \fBsetScale\fP (double vmin, double vmax, double step, int logarithmic=0)"
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.RI "void \fBsetScale\fP (const \fBQwtScaleDiv\fP &s)"
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.RI "void \fBsetScaleMaxMajor\fP (int ticks)"
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.RI "void \fBsetScaleMaxMinor\fP (int ticks)"
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.RI "void \fBautoScale\fP ()"
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.RI "int \fBscaleMaxMinor\fP () const"
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.RI "int \fBscaleMaxMajor\fP () const"
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.RI "void \fBsetScaleDraw\fP (\fBQwtScaleDraw\fP *)"
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.RI "const \fBQwtScaleDraw\fP * \fBscaleDraw\fP () const"
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.SS "Protected Member Functions"

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.RI "bool \fBhasUserScale\fP ()"
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.RI "virtual void \fBscaleChange\fP ()=0"
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.RI "\fBQwtScaleDraw\fP * \fBscaleDraw\fP ()"
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.SH "Constructor & Destructor Documentation"
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.SS "QwtScaleIf::QwtScaleIf ()"
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Constructor. 
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Definition at line 13 of file qwt_sclif.cpp.
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References QwtScaleDraw::setScale().
.SS "QwtScaleIf::~\fBQwtScaleIf\fP ()\fC [virtual]\fP"
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Destructor. 
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Definition at line 24 of file qwt_sclif.cpp.
.SH "Member Function Documentation"
.PP 
.SS "void QwtScaleIf::autoScale ()"
.PP
Advise the widget to control the scale range internally. 
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Autoscaling is on by default. 
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\fBSee also:\fP
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\fBQwtScaleIf::setScale()\fP 
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Definition at line 99 of file qwt_sclif.cpp.
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References scaleChange().
.SS "bool QwtScaleIf::hasUserScale ()\fC [protected]\fP"
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Check for user-defined scale. 
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Definition at line 62 of file qwt_sclif.h.
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Referenced by QwtSlider::rangeChange(), QwtSlider::scaleChange(), and QwtThermo::setRange().
.SS "virtual void QwtScaleIf::scaleChange ()\fC [protected, pure virtual]\fP"
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Notify changed scale. 
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Implemented in \fBQwtSlider\fP, and \fBQwtThermo\fP.
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Referenced by autoScale(), setScale(), setScaleMaxMajor(), and setScaleMaxMinor().
.SS "\fBQwtScaleDraw\fP * QwtScaleIf::scaleDraw ()\fC [protected]\fP"
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\fBReturns:\fP
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scale draw 
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\fBSee also:\fP
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\fBQwtScaleIf::setScaleDraw\fP 
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Definition at line 168 of file qwt_sclif.cpp.
.SS "const \fBQwtScaleDraw\fP * QwtScaleIf::scaleDraw () const"
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\fBReturns:\fP
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scale draw 
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\fBSee also:\fP
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\fBQwtScaleIf::setScaleDraw\fP 
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Definition at line 177 of file qwt_sclif.cpp.
.PP
Referenced by QwtThermo::draw(), QwtSlider::draw(), QwtKnob::draw(), QwtSlider::getScrollMode(), QwtSlider::getValue(), QwtSlider::layoutSlider(), QwtThermo::layoutThermo(), QwtThermo::minimumSizeHint(), QwtSlider::minimumSizeHint(), QwtKnob::minimumSizeHint(), QwtKnob::QwtKnob(), QwtSlider::QwtSlider(), QwtSlider::rangeChange(), QwtSlider::scaleChange(), QwtThermo::setRange(), QwtKnob::setTotalAngle(), QwtThermo::sizePolicy(), and QwtSlider::xyPosition().
.SS "int QwtScaleIf::scaleMaxMajor () const"
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\fBReturns:\fP
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max. number of major tick intervals 
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Definition at line 55 of file qwt_sclif.h.
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Referenced by QwtSlider::rangeChange(), QwtSlider::scaleChange(), and QwtThermo::setRange().
.SS "int QwtScaleIf::scaleMaxMinor () const"
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\fBReturns:\fP
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max. number of minor tick intervals 
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Definition at line 53 of file qwt_sclif.h.
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Referenced by QwtSlider::rangeChange(), QwtSlider::scaleChange(), and QwtThermo::setRange().
.SS "void QwtScaleIf::setScale (const \fBQwtScaleDiv\fP & s)"
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Assign a user-defined scale division 
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\fBParameters:\fP
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\fIs\fP scale division 
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Definition at line 81 of file qwt_sclif.cpp.
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References QwtScaleDiv::majCnt(), QwtScaleDiv::minCnt(), scaleChange(), QwtScaleDraw::scaleDiv(), and QwtScaleDraw::setScale().
.SS "void QwtScaleIf::setScale (double vmin, double vmax, double step, int logarithmic = \fC0\fP)"
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Specify a user-defined scale. 
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By default, the widget is supposed to control the range of its scale automatically, but sometimes it is desirable to have a user-defined scale which is not in sync with the widget's range, e.g. if a logarithmic scale is needed (sliders don't support that) or if the scale is required to have a fixed range (say 0...100%), independent of the widget's range. 
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\fBParameters:\fP
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\fIvmin\fP 
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\fIvmax\fP interval boundaries 
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\fIstep\fP major step size 
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\fIlogarithmic\fP If != 0, build a logarithmic scale 
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\fBSee also:\fP
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\fBQwtScaleIf::autoScale()\fP 
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Definition at line 66 of file qwt_sclif.cpp.
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References scaleChange(), QwtScaleDraw::scaleDiv(), and QwtScaleDraw::setScale().
.SS "void QwtScaleIf::setScale (double vmin, double vmax, int logarithmic = \fC0\fP)"
.PP
Specify a user-defined scale. 
.PP
By default, the widget is supposed to control the range of its scale automatically, but sometimes it is desirable to have a user-defined scale which is not in sync with the widget's range, e.g. if a logarithmic scale is needed (sliders don't support that) or if the scale is required to have a fixed range (say 0...100%), independent of the widget's range. 
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\fBParameters:\fP
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\fIvmin\fP 
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\fIvmax\fP boundary values 
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\fIlogarithmic\fP If != 0, Build a logarithmic scale 
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\fBSee also:\fP
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\fBQwtScaleIf::autoScale()\fP 
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Definition at line 44 of file qwt_sclif.cpp.
.SS "void QwtScaleIf::setScaleDraw (\fBQwtScaleDraw\fP * sd)"
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Set a scale draw sd has to be created with new and will be deleted in \fBQwtScaleIf::~QwtScaleIf\fP or the next call of \fBQwtScaleIf::setScaleDraw\fP. 
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Definition at line 155 of file qwt_sclif.cpp.
.SS "void QwtScaleIf::setScaleMaxMajor (int ticks)"
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Set the maximum number of major tick intervals. 
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The scale's major ticks are calculated automatically such that the number of major intervals does not exceed ticks. The default value is 5. 
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\fBParameters:\fP
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\fIticks\fP maximal number of major ticks. 
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\fBSee also:\fP
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\fBQwtScaleDraw\fP 
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Definition at line 117 of file qwt_sclif.cpp.
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References QwtScaleDiv::hBound(), QwtScaleDiv::lBound(), QwtScaleDiv::logScale(), scaleChange(), QwtScaleDraw::scaleDiv(), and QwtScaleDraw::setScale().
.SS "void QwtScaleIf::setScaleMaxMinor (int ticks)"
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Set the maximum number of minor tick intervals. 
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The scale's minor ticks are calculated automatically such that the number of minor intervals does not exceed ticks. The default value is 3. 
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\fBParameters:\fP
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\fIticks\fP 
.RE
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\fBSee also:\fP
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\fBQwtScaleDraw\fP 
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Definition at line 138 of file qwt_sclif.cpp.
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References QwtScaleDiv::hBound(), QwtScaleDiv::lBound(), QwtScaleDiv::logScale(), scaleChange(), QwtScaleDraw::scaleDiv(), and QwtScaleDraw::setScale().

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