qwtcurve.3

linux下qt的第三方的一个类

\fBQwtCurve::draw\fP, \fBQwtCurve::drawCurve\fP, \fBQwtCurve::drawDots\fP, \fBQwtCurve::drawLines\fP, \fBQwtCurve::drawSpline\fP, \fBQwtCurve::drawSticks\fP 
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Definition at line 539 of file qwt_curve.cpp.
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References closePolyline(), QwtPainter::drawPolygon(), QwtPainter::drawPolyline(), QwtDiMap::transform(), x(), and y().
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Referenced by drawCurve().
.SS "void QwtCurve::drawSticks (QPainter * painter, const \fBQwtDiMap\fP & xMap, const \fBQwtDiMap\fP & yMap, int from, int to)\fC [protected]\fP"
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Draw sticks. 
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\fBParameters:\fP
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\fIpainter\fP Painter 
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\fIxMap\fP x map 
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\fIyMap\fP y map 
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\fIfrom\fP index of the first point to be painted 
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\fIto\fP index of the last point to be painted 
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\fBSee also:\fP
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\fBQwtCurve::draw\fP, \fBQwtCurve::drawCurve\fP, \fBQwtCurve::drawDots\fP, \fBQwtCurve::drawLines\fP, \fBQwtCurve::drawSpline\fP, \fBQwtCurve::drawSteps\fP 
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Definition at line 473 of file qwt_curve.cpp.
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References QwtPainter::drawLine(), QwtDiMap::transform(), x(), and y().
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Referenced by drawCurve().
.SS "void QwtCurve::drawSymbols (QPainter * painter, \fBQwtSymbol\fP & symbol, const \fBQwtDiMap\fP & xMap, const \fBQwtDiMap\fP & yMap, int from, int to)\fC [protected, virtual]\fP"
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Draw symbols. 
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\fBParameters:\fP
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\fIpainter\fP Painter 
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\fIsymbol\fP Curve symbol 
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\fIxMap\fP x map 
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\fIyMap\fP y map 
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\fIfrom\fP index of the first point to be painted 
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\fIto\fP index of the last point to be painted 
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Definition at line 865 of file qwt_curve.cpp.
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References QwtSymbol::brush(), QwtSymbol::draw(), QwtSymbol::pen(), QwtSymbol::size(), QwtDiMap::transform(), x(), and y().
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Referenced by draw().
.SS "void QwtCurve::init (const QString & title)\fC [protected]\fP"
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Initialize data members. 
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Definition at line 22 of file qwt_curve.cpp.
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Referenced by QwtCurve().
.SS "double QwtCurve::maxXValue () const"
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\fBboundingRect()\fP.x2() 
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Definition at line 113 of file qwt_curve.h.
.SS "double QwtCurve::maxYValue () const"
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\fBboundingRect()\fP.y2() 
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Definition at line 117 of file qwt_curve.h.
.SS "double QwtCurve::minXValue () const"
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\fBboundingRect()\fP.x1() 
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Definition at line 111 of file qwt_curve.h.
.SS "double QwtCurve::minYValue () const"
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\fBboundingRect()\fP.y1() 
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Definition at line 115 of file qwt_curve.h.
.SS "const \fBQwtCurve\fP & QwtCurve::operator= (const \fBQwtCurve\fP & c)"
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Copy Assignment. 
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Definition at line 69 of file qwt_curve.cpp.
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References copy(), and curveChanged().
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Referenced by QwtPlotCurve::operator=().
.SS "int QwtCurve::options () const"
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Return the current style options. 
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\fBSee also:\fP
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\fBQwtCurve::setOptions\fP 
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Definition at line 795 of file qwt_curve.cpp.
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Referenced by QwtPlot::curveOptions().
.SS "const QPen & QwtCurve::pen () const"
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Return the pen used to draw the lines. 
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\fBSee also:\fP
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\fBQwtCurve::setPen\fP 
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Definition at line 165 of file qwt_curve.cpp.
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Referenced by QwtPlotPrintFilter::apply(), QwtPlot::curvePen(), QwtPlotPrintFilter::reset(), and QwtPlot::updateLegendItem().
.SS "void QwtCurve::setBaseline (double ref)"
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Set the value of the baseline. 
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The baseline is needed for filling the curve with a brush or the QwtCurve::Sticks drawing style. The default value is 0.0. The interpretation of the baseline depends on the style options. With QwtCurve::Yfx, the baseline is interpreted as a horizontal line at y = \fBbaseline()\fP, with QwtCurve::Yfy, it is interpreted as a vertical line at x = \fBbaseline()\fP. 
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\fBParameters:\fP
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\fIref\fP baseline 
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\fBSee also:\fP
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\fBQwtCurve::setBrush()\fP, \fBQwtCurve::setStyle()\fP, \fBQwtCurve::setOptions()\fP 
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Definition at line 897 of file qwt_curve.cpp.
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References curveChanged().
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Referenced by QwtPlot::setCurveBaseline().
.SS "void QwtCurve::setBrush (const QBrush & brush)"
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Assign a brush. In case of brush.style() != QBrush::NoBrush and \fBstyle()\fP != QwtCurve::Sticks the area between the curve and the baseline will be filled. In case !brush.color().isValid() the area will be filled by pen.color(). The fill algorithm simply connects the first and the last curve point to the baseline. So the curve data has to be sorted (ascending or descending). 
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\fBParameters:\fP
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\fIbrush\fP New brush 
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\fBSee also:\fP
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\fBQwtCurve::brush\fP, \fBQwtCurve::setBaseline\fP, \fBQwtCurve::baseline\fP 
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Definition at line 182 of file qwt_curve.cpp.
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References curveChanged().
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Referenced by QwtPlot::setCurveBrush().
.SS "void QwtCurve::setData (const \fBQwtData\fP & data)"
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Initialize data with a pointer to \fBQwtData\fP.
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\fBParameters:\fP
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\fIdata\fP Data
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\fBSee also:\fP
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\fBQwtData::copy\fP. 
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Definition at line 257 of file qwt_curve.cpp.
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References QwtData::copy(), and curveChanged().
.SS "void QwtCurve::setData (const QwtArray< \fBQwtDoublePoint\fP > & data)"
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Initialize data with an array of points (explicitly shared).
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\fBParameters:\fP
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\fIdata\fP Data
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\fBSee also:\fP
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QwtDoublePointData::setData. 
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Definition at line 243 of file qwt_curve.cpp.
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References curveChanged().
.SS "void QwtCurve::setData (const QwtArray< double > & xData, const QwtArray< double > & yData)"
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Initialize data with x- and y-arrays (explicitly shared). 
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\fBParameters:\fP
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\fIxData\fP x data 
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\fIyData\fP y data
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\fBSee also:\fP
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QwtData::setData. 
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Definition at line 228 of file qwt_curve.cpp.
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References curveChanged().
.SS "void QwtCurve::setData (const double * xData, const double * yData, int size)"
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Set data by copying x- and y-values from specified memory blocks Contrary to \fB\fBQwtPlot::setCurveRawData\fP\fP, this function makes a 'deep copy' of the data. 
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\fBParameters:\fP
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\fIxData\fP pointer to x values 
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\fIyData\fP pointer to y values 
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\fIsize\fP size of xData and yData
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\fBSee also:\fP
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QwData::setData. 
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Definition at line 213 of file qwt_curve.cpp.
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References curveChanged().
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Referenced by QwtPlot::setCurveData().
.SS "void QwtCurve::setOptions (int opt)"
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Specify options for the drawing style. 
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The options can be used to modify the drawing style. Options can be or-combined. The following options are defined:
.IP "\fBQwtCurve::Auto \fP" 1c
The default setting. For QwtCurve::spline, this means that the type of the spline is determined automatically, depending on the data. For all other styles, this means that y is regarded as a function of x. 
.IP "\fBQwtCurve::Yfx \fP" 1c
Draws y as a function of x (the default). The baseline is interpreted as a horizontal line with y = \fBbaseline()\fP. 
.IP "\fBQwtCurve::Xfy \fP" 1c
Draws x as a function of y. The baseline is interpreted as a vertical line with x = \fBbaseline()\fP. 
.IP "\fBQwtCurve::Parametric \fP" 1c
For QwtCurve::Spline only. Draws a parametric spline. 
.IP "\fBQwtCurve::Periodic \fP" 1c
For QwtCurve::Spline only. Draws a periodic spline. 
.IP "\fBQwtCurve::Inverted \fP" 1c
For QwtCurve::Steps only. Draws a step function from the right to the left.
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\fBParameters:\fP
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\fIopt\fP new options /sa \fBQwtCurve::options()\fP 
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Definition at line 785 of file qwt_curve.cpp.
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References curveChanged().
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Referenced by QwtPlot::setCurveOptions().
.SS "void QwtCurve::setPen (const QPen & p)"
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Assign a pen. 
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\fBParameters:\fP
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\fIp\fP New pen 
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Definition at line 152 of file qwt_curve.cpp.
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References curveChanged().
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Referenced by QwtPlotPrintFilter::apply(), QwtPlotPrintFilter::reset(), and QwtPlot::setCurvePen().
.SS "void QwtCurve::setRawData (const double * xData, const double * yData, int size)"
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Initialize the data by pointing to memory blocks which are not managed by QwtCurve. 
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setRawData is provided for efficiency. It is important to keep the pointers during the lifetime of the underlying \fBQwtCPointerData\fP class.
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\fBParameters:\fP
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\fIxData\fP pointer to x data 
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\fIyData\fP pointer to y data 
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\fIsize\fP size of x and y
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\fBSee also:\fP
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QwtCPointerData::setData. 
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Definition at line 277 of file qwt_curve.cpp.
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References curveChanged().
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Referenced by QwtPlot::setCurveRawData().
.SS "void QwtCurve::setSplineSize (int s)"
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Change the number of interpolated points. 
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\fBParameters:\fP
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\fIs\fP new size 
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\fBWarning:\fP
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The default is 250 points. 
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Definition at line 805 of file qwt_curve.cpp.
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References curveChanged().
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Referenced by QwtPlot::setCurveSplineSize().
.SS "void QwtCurve::setStyle (int style, int options = \fC0\fP)"
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Set the curve's drawing style. 
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Valid styles are: 
.IP "\fBQwtCurve::NoCurve \fP" 1c
Don't draw a curve. Note: This doesn't affect the symbol.  
.IP "\fBQwtCurve::Lines \fP" 1c
Connect the points with straight lines. 
.IP "\fBQwtCurve::Sticks \fP" 1c
Draw vertical sticks from a baseline which is defined by \fBsetBaseline()\fP. 
.IP "\fBQwtCurve::Steps \fP" 1c
Connect the points with a step function. The step function is drawn from the left to the right or vice versa, depending on the 'Inverted' option. 
.IP "\fBQwtCurves::Dots \fP" 1c
Draw dots at the locations of the data points. Note: This is different from a dotted line (see \fBsetPen()\fP). 
.IP "\fBQwtCurve::Spline \fP" 1c
Interpolate the points with a spline. The spline type can be specified with \fBsetOptions()\fP, the size of the spline (= number of interpolated points) can be specified with \fBsetSplineSize()\fP. 
.IP "\fBQwtCurve::UserCurve ... \fP" 1c
Styles >= QwtCurve::UserCurve are reserved for derived classes of QwtCurve that overload \fBQwtCurve::draw()\fP with additional application specific curve types. 
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\fBSee also:\fP
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\fBQwtCurve::style()\fP 
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Definition at line 110 of file qwt_curve.cpp.
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References curveChanged().
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Referenced by QwtPlot::setCurveStyle().
.SS "void QwtCurve::setSymbol (const \fBQwtSymbol\fP & s)"
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Assign a symbol. 
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\fBParameters:\fP
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\fIs\fP symbol 
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\fBSee also:\fP
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\fBQwtSymbol\fP 
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Definition at line 132 of file qwt_curve.cpp.
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References curveChanged().
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Referenced by QwtPlotPrintFilter::apply(), QwtPlotPrintFilter::reset(), and QwtPlot::setCurveSymbol().
.SS "void QwtCurve::setTitle (const QString & title)"
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Assign a title to a curve. 
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\fBParameters:\fP
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\fItitle\fP new title 
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Definition at line 288 of file qwt_curve.cpp.
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References curveChanged().
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Referenced by QwtPlot::insertCurve(), and QwtPlot::setCurveTitle().
.SS "int QwtCurve::splineSize () const"
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Return the spline size. 
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\fBSee also:\fP
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\fBQwtCurve::setSplineSize\fP 
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Definition at line 817 of file qwt_curve.cpp.
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Referenced by QwtPlot::curveSplineSize().
.SS "int QwtCurve::style () const"
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Return the current style. 
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\fBSee also:\fP
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\fBQwtCurve::setStyle\fP 
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Definition at line 122 of file qwt_curve.cpp.
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Referenced by QwtPlot::curveStyle(), and QwtPlot::updateLegendItem().
.SS "const \fBQwtSymbol\fP & QwtCurve::symbol () const"
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Return the current symbol. 
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\fBSee also:\fP
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\fBQwtCurve::setSymbol\fP 
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Definition at line 142 of file qwt_curve.cpp.
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Referenced by QwtPlotPrintFilter::apply(), QwtPlot::curveSymbol(), QwtPlotPrintFilter::reset(), and QwtPlot::updateLegendItem().
.SS "const QString & QwtCurve::title () const"
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Return the title. 
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\fBSee also:\fP
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\fBQwtCurve::setTitle\fP 
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Definition at line 298 of file qwt_curve.cpp.
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Referenced by QwtPlot::curveTitle(), and QwtPlot::updateLegendItem().
.SS "int QwtCurve::verifyRange (int & i1, int & i2)\fC [protected]\fP"
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Checks if a range of indices is valid and corrects it if necessary. 
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\fBParameters:\fP
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\fIi1\fP Index 1 
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\fIi2\fP Index 2 
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Definition at line 331 of file qwt_curve.cpp.
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References dataSize(), qwtLim(), and qwtSort().
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Referenced by draw().
.SS "double QwtCurve::x (int i) const"
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\fBParameters:\fP
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\fIi\fP index 
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\fBReturns:\fP
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x-value at position i 
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Definition at line 205 of file qwt_curve.h.
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Referenced by QwtPlot::closestCurve(), drawDots(), drawLines(), drawSpline(), drawSteps(), drawSticks(), and drawSymbols().
.SS "double QwtCurve::y (int i) const"
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\fBParameters:\fP
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\fIi\fP index 
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\fBReturns:\fP
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y-value at position i 
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Definition at line 214 of file qwt_curve.h.
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References QwtData::y().
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Referenced by QwtPlot::closestCurve(), drawDots(), drawLines(), drawSpline(), drawSteps(), drawSticks(), and drawSymbols().

.SH "Author"
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