See Plots and charts for further information.
This package was and is written by AM.
Documentation can be found at http://tcllib.sourceforge.net/doc/plotchart.html
A part of tklib, a set of tk-related extension/widgets.
Bryan Oakley 09-May-2005 I notice that the code uses [$w cget -width] everywhere it needs a value to compute the width of the graph. My first thought was that this seemed wrong -- it ought to use [winfo width $w] so that it will be drawn to fit the window in case the window grows because of the way it is packed/gridded. Of course, this also means the graph will shrink if the viewable portion of the canvas is less than the configured width/height of the canvas.
I can see a case for each behavior, so I'm wondering if it would be useful to have a configuration option such that one could do $plot configure -width "actual" or ... -width "request". Of course, I can simulate that by adding code to do something like [.canvas configure -width [winfo width .canvas] after I pack/grid it, but I'm not fond of that solution.
JE What are the cases for the current behavior? It seems to me that the actual width is always the right thing to use, I can't think of when you'd want it to use the requested width (if the two differ).
A third option might be to specify an actual value, e.g. $plot configure -width 200 for the case where you have a really large plot that you want to scroll around in a small canvas.
I'd be willing to contribute the code for this option if you think it would be useful.
AM (10 may 2005) I have not given much thought to this issue, I must admit. Resizing the plot's canvas may have to result in one of several things:
I can see all of these happening - should there be an option for dealing with this? Code contributions are welcomed of course.
PWE 20070806 Now I've started using plotchart, some comments/questions on the xy-plots. 1) If the title of the chart is long, it overwrites the text of the Y axis. 2) Is it possible to have a custom format for the X or Y axis labels. For instance when the X axis is time, to have the labels display dates? Something like blt's
axis configure myaxis -command myformat
3) Is it possible to have multiple charts on a single canvas? So one can make a report with multiple graphs, and print it on a single sheet of paper?