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From: Alan Grunwald <nospam.nurdglaw@gmail.com>
Newsgroups: comp.lang.tcl
Subject: Plotchart - t-axis labels
Date: Sun, 4 May 2025 15:46:06 +0100
Organization: A noiseless patient Spider
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I'm trying to plot a set of timed values using Plotchart::createTXPlot.

My first vaguely successful attempt leads to unreadable labels on the 
(horizontal) t-axis because the date/times overlap each other. I'd like 
to specify that the labels be displayed vertically, which seems a fairly 
good and obvious solution but I can't see a way to do this easily using 
Plotchart commands.

I have discovered by experiment that the labels are specified by canvas 
items with the tag "taxis", so I can rotate the items with code like this:

foreach item [$canvas find withtag taxis] {
     if {[$canvas type $item] eq "text"} {
         $canvas itemconfigure $item -angle 270 -anchor e
     }
}

but since this isn't documented, I fear it may change in a future 
version of Plotchart.

I'm also having a bit of trouble getting the canvas to scroll properly 
which I haven't yet worked out properly.

Is there a better, preferrably a "supported" way to do this?

Thanks