Re: dafault terminal on windows

On Wednesday, 15 December 2021 14:39:14 PST Tatsuro MATSUOKA wrote:
> > This is the first I have heard about broken demos.
> > Why does the terminal make a difference?
> > Is this because of UTF-8 encoding?  But that is not specific to qt.
> 
> Proportion of size for qt terminal sometimes strane qt terminal for windows.
> (qt terminal on linux environments(including cywin) strange plots do not appear)
> 
> One example jitter.dem
> http://tmacchant33.starfree.jp/Files/jitter_qt_win.png
> http://tmacchant33.starfree.jp/Files/jitter_wxt_win.png
> http://tmacchant33.starfree.jp/Files/jitter_windows_win.png

That is evidence of a font problem.
The jitter algorithm calculates displacement in terms of
horizontal character width, which is obtained from the font
metrics.  If the font incorrectly reports the width, then
all of the jitter displacements are too big or too small.

I am a bit surprised that the wxt terminal doesn't show the
same problem.  On linux, both qt and wxt use the same font
mechanism.  But perhaps this isn't the case on Windows.

If I recall correctly, you can configure wxWidgets to use
different system back-ends.  If you can figure out what
configuration option wxt is using to get correct font metrics,
maybe we can persuade qt to use that same mechanism.

	Ethan





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