qwtplot.3

linux下qt的第三方的一个类

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Definition at line 299 of file qwt_plot.cpp.
.SS "\fBQwtPlotCanvas\fP * QwtPlot::canvas ()"
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\fBReturns:\fP
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the plot's canvas 
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Definition at line 291 of file qwt_plot.cpp.
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Referenced by canvasBackground(), canvasLineWidth(), drawCurve(), QwtPlotLayout::minimumSizeHint(), setCanvasBackground(), and setCanvasLineWidth().
.SS "const QColor & QwtPlot::canvasBackground () const"
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Nothing else than: \fBcanvas()\fP->palette().color( QPalette::Normal, QColorGroup::Background);
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\fBReturns:\fP
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the background color of the plotting area. 
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Definition at line 771 of file qwt_plot.cpp.
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References canvas().
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Referenced by QwtPlotPrintFilter::apply(), and printCanvas().
.SS "int QwtPlot::canvasLineWidth () const"
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Nothing else than: \fBcanvas()\fP->lineWidth(), left for compatibility only. 
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\fBReturns:\fP
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the border width of the plotting area 
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Definition at line 793 of file qwt_plot.cpp.
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References canvas().
.SS "\fBQwtDiMap\fP QwtPlot::canvasMap (int axis) const"
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\fBParameters:\fP
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\fIaxis\fP Axis 
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\fBReturns:\fP
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Map for the axis on the canvas. With this map pixel coordinates can translated to plot coordinates and vice versa. 
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\fBSee also:\fP
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\fBQwtDiMap\fP, \fBQwtPlot::transform\fP, \fBQwtPlot::invTransform\fP 
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Definition at line 675 of file qwt_plot.cpp.
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References axisEnabled(), QwtPlotLayout::canvasMargin(), QwtScale::endBorderDist(), QwtScaleDiv::hBound(), QwtScaleDiv::lBound(), QwtScaleDiv::logScale(), margin(), plotLayout(), QwtAutoScale::scaleDiv(), QwtDiMap::setDblRange(), QwtDiMap::setIntRange(), and QwtScale::startBorderDist().
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Referenced by closestCurve(), closestMarker(), drawCanvas(), drawCurve(), QwtPlotPicker::invTransform(), invTransform(), QwtPlotPicker::transform(), and transform().
.SS "void QwtPlot::changeAxisOptions (int axis, int opt, bool value)"
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Change specified autoscaling options of an axis. 
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\fBParameters:\fP
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\fIaxis\fP axis index 
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\fIopt\fP Set of or'ed options 
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\fIvalue\fP Value to be assigned to all the specified options (TRUE or FALSE) 
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\fBSee also:\fP
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\fBQwtAutoScale::changeOptions\fP 
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Definition at line 229 of file qwt_plot_axis.cpp.
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References autoRefresh(), axisValid(), and QwtAutoScale::changeOptions().
.SS "void QwtPlot::clear ()\fC [slot]\fP"
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Remove all curves and markers. 
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Definition at line 932 of file qwt_plot.cpp.
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References QwtLegend::clear().
.SS "long QwtPlot::closestCurve (int xpos, int ypos, int & dist, double & xval, double & yval, int & index) const"
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Find the curve which is closest to a point in the plotting area.
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Determines the position and index of the closest data point. 
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\fBParameters:\fP
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\fIxpos\fP 
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\fIypos\fP coordinates of a point in the plotting region 
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\fBReturn values:\fP
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\fIxval\fP .br
\fIyval\fP values of the closest point in the curve's data array 
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\fIdist\fP -- distance in points between (xpos, ypos) and the closest data point 
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\fIindex\fP -- index of the closest point in the curve's data array 
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\fBReturns:\fP
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Key of the closest curve or 0 if no curve was found. 
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Definition at line 50 of file qwt_plot_curve.cpp.
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References axis(), canvasMap(), curveIterator(), QwtCurve::dataSize(), qwtSqr(), QwtCurve::x(), QwtPlotMappedItem::xAxis(), QwtDiMap::xTransform(), QwtCurve::y(), and QwtPlotMappedItem::yAxis().
.SS "long QwtPlot::closestCurve (int xpos, int ypos, int & dist) const"
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Find the curve which is closest to a specified point in the plotting area. 
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\fBParameters:\fP
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\fIxpos\fP 
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\fIypos\fP position in the plotting region 
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\fBReturn values:\fP
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\fIdist\fP distance in points between (xpos, ypos) and the closest data point 
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\fBReturns:\fP
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Key of the closest curve or 0 if no curve was found. 
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Definition at line 30 of file qwt_plot_curve.cpp.
.SS "long QwtPlot::closestMarker (int xpos, int ypos, int & dist) const"
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Find the marker which is closest to a given point. 
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\fBParameters:\fP
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\fIxpos\fP .br
\fIypos\fP coordinates of a point in the plotting region 
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\fBReturn values:\fP
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\fIdist\fP Distance in points between the marker and the specified point. 
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\fBReturns:\fP
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Key of the closest marker or 0 if no marker was found 
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Definition at line 29 of file qwt_plot_marker.cpp.
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References axis(), canvasMap(), QwtMarker::lineStyle(), markerIterator(), qwtSqr(), QwtSymbol::style(), QwtMarker::symbol(), QwtPlotMappedItem::xAxis(), QwtDiMap::xTransform(), QwtPlotMarker::xValue(), QwtPlotMappedItem::yAxis(), and QwtPlotMarker::yValue().
.SS "const \fBQwtPlotCurve\fP * QwtPlot::curve (long key) const"
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Find and return an existing curve. 
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\fBParameters:\fP
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\fIkey\fP Key of the curve 
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\fBReturns:\fP
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The curve for the given key or 0 if key is not valid. 
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Definition at line 307 of file qwt_plot_curve.cpp.
.SS "\fBQwtPlotCurve\fP * QwtPlot::curve (long key)"
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Find and return an existing curve. 
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\fBParameters:\fP
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\fIkey\fP Key of the curve 
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\fBReturns:\fP
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The curve for the given key or 0 if key is not valid. 
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Definition at line 297 of file qwt_plot_curve.cpp.
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Referenced by drawCanvasItems(), drawCurve(), enableLegend(), insertCurve(), and updateLegendItem().
.SS "double QwtPlot::curveBaseline (long key) const"
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Return the baseline offset for a specified curve. 
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\fBParameters:\fP
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\fIkey\fP curve key 
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\fBReturns:\fP
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Baseline offset of the specified curve, or 0 if the curve doesn't exist 
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\fBSee also:\fP
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\fBsetCurveBaseline()\fP 
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Definition at line 626 of file qwt_plot_curve.cpp.
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References QwtCurve::baseline().
.SS "QBrush QwtPlot::curveBrush (long key) const"
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\fBReturns:\fP
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the pen of the curve indexed by key 
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\fBParameters:\fP
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\fIkey\fP Key of the curve 
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\fBSee also:\fP
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\fBQwtPlot::setCurveBrush()\fP, \fBQwtCurve::setBrush()\fP 
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Definition at line 124 of file qwt_plot_curve.cpp.
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References QwtCurve::brush().
.SS "QwtPlotCurveIterator QwtPlot::curveIterator () const"
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Return an iterator for the plot curves. 
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Definition at line 16 of file qwt_plot_curve.cpp.
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Referenced by closestCurve(), curveKeys(), drawCanvasItems(), enableLegend(), setLegendDisplayPolicy(), and updateAxes().
.SS "QwtArray< long > QwtPlot::curveKeys () const"
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\fBReturns:\fP
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an array containing the keys of all curves 
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Definition at line 162 of file qwt_plot_curve.cpp.
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References curveIterator().
.SS "int QwtPlot::curveOptions (long key) const"
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\fBReturns:\fP
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the drawing options of the curve indexed by key 
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\fBParameters:\fP
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\fIkey\fP Key of the curve 
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Definition at line 133 of file qwt_plot_curve.cpp.
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References QwtCurve::options().
.SS "QPen QwtPlot::curvePen (long key) const"
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\fBReturns:\fP
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the brush of the curve indexed by key 
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\fBParameters:\fP
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\fIkey\fP Key of the curve 
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Definition at line 113 of file qwt_plot_curve.cpp.
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References QwtCurve::pen().
.SS "int QwtPlot::curveSplineSize (long key) const"
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\fBReturns:\fP
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the spline size of the curve indexed by key 
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\fBParameters:\fP
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\fIkey\fP Key of the curve 
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Definition at line 143 of file qwt_plot_curve.cpp.
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References QwtCurve::splineSize().
.SS "int QwtPlot::curveStyle (long key) const"
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\fBReturns:\fP
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the style of the curve indexed by key 
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\fBParameters:\fP
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\fIkey\fP Key of the curve 
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\fBSee also:\fP
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\fBsetCurveStyle()\fP 
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Definition at line 91 of file qwt_plot_curve.cpp.
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References QwtCurve::style().
.SS "\fBQwtSymbol\fP QwtPlot::curveSymbol (long key) const"
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the symbol of the curve indexed by key 
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\fBParameters:\fP
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\fIkey\fP Key of the curve 
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\fBReturns:\fP
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The symbol of the specified curve. If the key is invalid, a symbol of type 'NoSymbol'. 
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Definition at line 103 of file qwt_plot_curve.cpp.
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References QwtCurve::symbol().
.SS "QString QwtPlot::curveTitle (long key) const"
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\fBReturns:\fP
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the title of the curve indexed by key 
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\fBParameters:\fP
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\fIkey\fP Key of the curve 
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Definition at line 153 of file qwt_plot_curve.cpp.
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References QwtCurve::title().
.SS "int QwtPlot::curveXAxis (long key) const"
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Return the index of the x axis to which a curve is mapped. 
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\fBParameters:\fP
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\fIkey\fP Key of the curve 
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\fBReturns:\fP
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x axis of the curve or -1 if the key is invalid. 
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Definition at line 180 of file qwt_plot_curve.cpp.
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References QwtPlotMappedItem::xAxis().
.SS "int QwtPlot::curveYAxis (long key) const"
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the index of the y axis to which a curve is mapped 
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\fBParameters:\fP
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\fIkey\fP Key of the curve 
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\fBReturns:\fP
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y axis of the curve or -1 if the key is invalid. 
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Definition at line 192 of file qwt_plot_curve.cpp.
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References QwtPlotMappedItem::yAxis().
.SS "void QwtPlot::drawCanvas (QPainter * painter)\fC [protected, virtual]\fP"
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Redraw the canvas. 
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\fBParameters:\fP
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\fIpainter\fP Painter used for drawing
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\fBWarning:\fP
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drawCanvas calls drawCanvasItems what is also used for printing. Applications that like to add individual plot items better overload \fBQwtPlot::drawCanvasItems\fP 
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\fBSee also:\fP
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\fBQwtPlot::drawCanvasItems\fP 
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Definition at line 567 of file qwt_plot.cpp.
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References canvasMap(), and drawCanvasItems().
.SS "void QwtPlot::drawCanvasItems (QPainter * painter, const QRect & rect, const QwtArray< \fBQwtDiMap\fP > & map, const \fBQwtPlotPrintFilter\fP & pfilter) const\fC [protected, virtual]\fP"
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Redraw the canvas items. 
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\fBParameters:\fP
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\fIpainter\fP Painter used for drawing 
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\fIrect\fP Bounding rectangle where to paint 
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\fImap\fP QwtPlot::axisCnt maps, mapping between plot and paint device coordinates 
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\fIpfilter\fP Plot print filter 
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Definition at line 585 of file qwt_plot.cpp.
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References curve(), curveIterator(), QwtMarker::draw(), QwtCurve::draw(), QwtGrid::draw(), QwtPlotItem::enabled(), marker(), markerIterator(), QwtPlotPrintFilter::options(), QwtPlotMappedItem::xAxis(), QwtPlotMarker::xValue(), QwtPlotMappedItem::yAxis(), and QwtPlotMarker::yValue().
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Referenced by drawCanvas(), and printCanvas().
.SS "void QwtPlot::drawContents (QPainter * p)\fC [protected, virtual]\fP"
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drawContents 
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Definition at line 548 of file qwt_plot.cpp.
.SS "void QwtPlot::drawCurve (long key, int from = \fC0\fP, int to = \fC-1\fP)"
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Draw a set of points of a curve. When observing an measurement while it is running, new points have to be added to an existing curve. drawCurve can be used to display them avoiding a complete redraw of the canvas. 
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\fBParameters:\fP
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\fIkey\fP curve key 
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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. If to < 0 the curve will be painted to its last point. 
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\fBSee also:\fP
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\fBQwtCurve::draw\fP 
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Definition at line 641 of file qwt_plot.cpp.
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References QwtPlotCanvas::cache(), QwtPlotCanvas::cacheMode(), canvas(), canvasMap(), curve(), QwtCurve::draw(), QwtPlotMappedItem::xAxis(), and QwtPlotMappedItem::yAxis().
.SS "void QwtPlot::enableAxis (int axis, bool tf = \fCTRUE\fP)"
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Enable or disable a specified axis. 
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When an axis is disabled, this only means that it is not visible on the screen. Curves, markers and can be attached to disabled axes, and transformation of screen coordinates into values works as normal.
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Only xBottom and yLeft are enabled by default. 
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\fBParameters:\fP
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\fIaxis\fP axis index 
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\fItf\fP \fCTRUE\fP (enabled) or \fCFALSE\fP (disabled) 
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Definition at line 251 of file qwt_plot_axis.cpp.
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References axisValid(), and updateLayout().
.SS "void QwtPlot::enableGridX (bool tf = \fCTRUE\fP)"
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Enable or disable vertical gridlines. 
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\fBParameters:\fP
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\fItf\fP Enable (TRUE) or disable (FALSE). Defaults to TRUE. 
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Definition at line 32 of file qwt_plot_grid.cpp.
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References QwtGrid::enableX().
.SS "void QwtPlot::enableGridXMin (bool tf = \fCTRUE\fP)"
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Enable or disable vertical gridlines for the minor scale marks. 
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\fBParameters:\fP
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\fItf\fP enable (TRUE) or disable (FALSE). Defaults to TRUE. 
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Definition at line 51 of file qwt_plot_grid.cpp.
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References QwtGrid::enableXMin().
.SS "void QwtPlot::enableGridY (bool tf = \fCTRUE\fP)"
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Enable or disable horizontal gridlines. 
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\fBParameters:\fP
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\fItf\fP Enable (TRUE) or disable (FALSE). Defaults to TRUE. 
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Definition at line 42 of file qwt_plot_grid.cpp.
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References QwtGrid::enableY().
.SS "void QwtPlot::enableGridYMin (bool tf = \fCTRUE\fP)"
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Enable or disable horizontal gridlines for the minor scale marks. 
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\fBParameters:\fP
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\fItf\fP enable (TRUE) or disable (FALSE). Defaults to TRUE. 
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Definition at line 60 of file qwt_plot_grid.cpp.
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References QwtGrid::enableYMin().
.SS "void QwtPlot::enableLegend (bool enable, long curveKey = \fC-1\fP)"
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Enable or disable the legend. 
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\fBParameters:\fP
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\fIenable\fP \fCTRUE\fP (enabled) or \fCFALSE\fP (disabled) 
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\fIcurveKey\fP Key of a existing curve. If curveKey < 0 the legends for all curves will be updated. 
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\fBSee also:\fP
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\fBQwtPlot::setAutoLegend()\fP 
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\fBQwtPlot::setLegendPosition()\fP 
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Definition at line 988 of file qwt_plot.cpp.
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References QwtLegend::clear(), curve(), curveIterator(), QwtLegend::findItem(), insertLegendItem(), QwtLegend::itemCount(), and updateLayout().