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24 lines
1.1 KiB
24 lines
1.1 KiB
15 years ago
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This library provides KPlotWidget and KPlotObject classes.
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KPlotWidget is a QWidget-derived class that provides a virtual baseclass
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for easy data-plotting. The idea behind KPlotWidget is that you only have
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to specify information in "data units"; i.e., the natural units of the
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data being plotted. KPlotWidget automatically converts everything
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to screen pixel units.
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KPlotWidget draws X and Y axes with tickmarks and tick labels. It
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automatically determines how many tickmarks to use and where they should
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be, based on the data limits specified for the plot. You change the limits
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by calling setLimits( double x1, double x2, double y1, double y2 ), and
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then calling updateTickmarks() to recompute the positions of tickmarks
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and ticklabels.
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Data to be plotted are stored using the KPlotObject class. KPlotObject
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consists of a QPtrList of DPoints, each specifying the X,Y coordinates
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of a data point (DPoint is like QPoint, but the X and Y values are doubles
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instead of ints). KPlotObject also specifies the "type" of data to be
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plotted (POINTS or CURVE or POLYGON or LABEL).
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Jason Harris
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kstars@30doradus.org
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