Re: Proposal: Saving graphs from Qt and wxt terminals

[sfeam <sf...@us...>]

On Saturday, 25 October 2014 12:18:45 AM Daniel J Sebald wrote:
> 
> I notice that gnuplot doesn't allow wxt and Qt in the same session. 
> What is the issue there?  I see this:
> 
> /* The qt and wxt terminals cannot be used in the same session. */
> /* Whichever one is used first to plot, this locks out the other. */
> void *term_interlock = NULL;

The wxt and qt libraries do not play nicely with each other.
They trample on each other's memory allocation schemes.
Or at least they did back when qt was first added to gnuplot.
Rather than having the program die in strange ways from the
memory conflict, it seemed better to only allow one or the
other at a time.

You could try removing the interlock test to see if the memory
conflict is still there.  I haven't gone back to check for a
long time.

	Ethan

> I suppose shutting down the existing external program with a terminal 
> change isn't the most graceful because it closes plot windows.  On the 
> other hand, neither is having to exit the program to switch the terminal 
> very elegant--plus doing so would close all existing windows, what is 
> apparently to be avoided.
> 
> Dan
> 
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