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Diffstat (limited to 'libkdeedu/kdeeduplot/README')
| -rw-r--r-- | libkdeedu/kdeeduplot/README | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/libkdeedu/kdeeduplot/README b/libkdeedu/kdeeduplot/README new file mode 100644 index 00000000..ab695f9a --- /dev/null +++ b/libkdeedu/kdeeduplot/README @@ -0,0 +1,23 @@ +This library provides KPlotWidget and KPlotObject classes. + +KPlotWidget is a QWidget-derived class that provides a virtual baseclass +for easy data-plotting. The idea behind KPlotWidget is that you only have +to specify information in "data units"; i.e., the natural units of the +data being plotted. KPlotWidget automatically converts everything +to screen pixel units. + +KPlotWidget draws X and Y axes with tickmarks and tick labels. It +automatically determines how many tickmarks to use and where they should +be, based on the data limits specified for the plot. You change the limits +by calling setLimits( double x1, double x2, double y1, double y2 ), and +then calling updateTickmarks() to recompute the positions of tickmarks +and ticklabels. + +Data to be plotted are stored using the KPlotObject class. KPlotObject +consists of a QPtrList of DPoints, each specifying the X,Y coordinates +of a data point (DPoint is like QPoint, but the X and Y values are doubles +instead of ints). KPlotObject also specifies the "type" of data to be +plotted (POINTS or CURVE or POLYGON or LABEL). + +Jason Harris +kstars@30doradus.org |