Re: Set pagesize [was Re: Clipping of arrows buggy]

[Ethan M. <merritt@u.washington.edu>]

On Friday 21 January 2005 11:33 am, Harald Harders wrote:
> 
> > > gnuplot does not control the size of the X window,
> >
> > And it shouldn't.  I.e., x11.trm should ignore 'set pagesize'.
> 
> I don't understand why not. It should get a default window size by the X
> resources, of course. But why the user shall not be able to produce two
> x11 terminal windows with different size in one session? You cannot change
> the X resources between two plots of one gnuplot session. But why not
> provide to produce different window sizes?

That's not the point.  Sure, you could start out with any window
size you like. But after you have opened the window, the size can be
changed externally by the user. So the gnuplot core code cannot
assume that it knows the current size of the window.

It would be possible to have gnuplot_x11 update the values
of term->xmax and term->ymax via the mousing pipe. You'll find
a commented out bit of code that does so.
But doing this breaks various assumptions in the gnuplot core.
I know it does, because I tried it; that's why the code
is there but commented out.  To fix all these you would have to
make explicit use of term->xmax and term->ymax in many places that
do not  currently check them at all. This might be worth doing,
but it goes in exactly the opposite direction of your current patch.

> Some terminals already have an own mechanism to change the size. The
> question now is how to handle a pagesize that differs from the default
> value in conjunction with an explicit size given in the 'set terminal'
> command. Shall the pagesize be overwritten by the terminal size or shall
> both values be multiplicated?

I am not clear on exactly what problem you are trying to fix
with this work. Would it suffice for your purposes if there
were a 'set term post ...' option that explicitly set the
BoundingBox?


-- 
Ethan A Merritt       merritt@u.washington.edu
Biomolecular Structure Center
Mailstop 357742
University of Washington, Seattle, WA 98195