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git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@6043 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

docs/latex/wx/plotcurve.tex

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+%
+% automatically generated by HelpGen from
+% plot.h at 11/Feb/00 18:00:57
+%
+
+\section{\class{wxPlotCurve}}\label{wxplotcurve}
+
+The wxPlotCurve class represents a curve displayed in a \helpref{wxPlotWindow}{wxplotwindow}. It
+is a virtual curve, i.e. is acts only as an interface, leaving it to the programmer to care for
+how the values pairs are matched. wxPlotWindow and wxPlotCurve are designed to display large
+amounts of data, i.e. most typically data measured by some sort of machine.
+
+This class is abstract, i.e. you have to derive your own class and implement the pure
+virtual functions (\helpref{GetStartX()}{wxplotcurvegetstartx}, \helpref{GetEndX()}{wxplotcurvegetendx}
+and \helpref{GetY()}{wxplotcurvegety}).
+
+\wxheading{Derived from}
+
+\helpref{wxObject}{wxobject}
+
+\latexignore{\rtfignore{\wxheading{Members}}}
+
+\membersection{wxPlotCurve::wxPlotCurve}\label{wxplotcurvewxplotcurve}
+
+\func{}{wxPlotCurve}{\param{int }{offsetY}, \param{double }{startY}, \param{double }{endY}}
+
+Constructor assigning start values. See below for interpretation.
+
+\membersection{wxPlotCurve::GetStartX}\label{wxplotcurvegetstartx}
+
+\func{wxInt32}{GetStartX}{\void}
+
+Must be overridden. This function should return the index of the first value
+of this curve, typically zero.
+
+\membersection{wxPlotCurve::GetEndX}\label{wxplotcurvegetendx}
+
+\func{wxInt32}{GetEndX}{\void}
+
+Must be overridden. This function should return the index of the last value
+of this curve, typically 99 if 100 values have been measured.
+
+\membersection{wxPlotCurve::GetY}\label{wxplotcurvegety}
+
+\func{double}{GetY}{\param{wxInt32 }{x}}
+
+Must be overridden. This function will return the actual Y value corresponding
+to the given X value. The x value is of an integer type because it is considered
+to be an index in row of measured values.
+
+\membersection{wxPlotCurve::SetStartY}\label{wxplotcurvesetstarty}
+
+\func{void}{SetStartY}{\param{double }{startY}}
+
+The value returned by this function tells the plot window what the lowest values
+in the curve will be os that a suitable scale can be found for the display. If
+the Y values in this curve are in the range of -1.5 to 0.5, this function should
+return -1.5 or maybe -2.0 for nicer optics.
+
+\membersection{wxPlotCurve::GetStartY}\label{wxplotcurvegetstarty}
+
+\func{double}{GetStartY}{\void}
+
+See \helpref{SetStartY}{wxplotcurvesetstarty}.
+
+\membersection{wxPlotCurve::SetEndY}\label{wxplotcurvesetendy}
+
+\func{void}{SetEndY}{\param{double }{endY}}
+
+The value returned by this function tells the plot window what the highest values
+in the curve will be os that a suitable scale can be found for the display. If
+the Y values in this curve are in the range of -1.5 to 0.5, this function should
+return 0.5 or maybe 1.0 for nicer optics.
+
+\membersection{wxPlotCurve::GetEndY}\label{wxplotcurvegetendy}
+
+\func{double}{GetEndY}{\void}
+
+See \helpref{SetStartY}{wxplotcurvesetendy}.
+
+\membersection{wxPlotCurve::SetOffsetY}\label{wxplotcurvesetoffsety}
+
+\func{void}{SetOffsetY}{\param{int }{offsetY}}
+
+When displaying several curves in one window, it is often useful to assign
+different offsets to the curves. You should call \helpref{wxPlotWindow::Move}{wxplotwindowmove}
+to set this value after you have added the curve to the window.
+
+\membersection{wxPlotCurve::GetOffsetY}\label{wxplotcurvegetoffsety}
+
+\func{int}{GetOffsetY}{\void}
+
+Returns the vertical offset.