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pgtk mouse wheel speed

From: Jindřich Makovička
Subject: pgtk mouse wheel speed
Date: Sat, 13 Nov 2021 11:05:50 +0100


I am really happy with the PGTK Emacs so far - about the only thing
that annoys me is the mouse scrolling wheel behavior - setting the
_per_char parameters to 2 cause Emacs to ignore every second mouse
wheel "click", which makes the scrolling really slow, at least when
one is used to the scroll rate of 5 lines per wheel click the ordinary
X Emacs uses.

I am currently applying the patch below to bring things back to normal
- is there any way to override the scrolling speed without patching the

From ef7b0931cf1687b4d3af71ff1eda7a70f594be52 Mon Sep 17 00:00:00 2001
From: Jindřich Makovička <makovick@gmail.com>
Date: Sun, 25 Jul 2021 09:39:46 +0200
Subject: Scroll by 5 chars/lines per mouse whell click

diff --git a/src/pgtkterm.c b/src/pgtkterm.c
index 86074d010d..adf8b77909 100644
--- a/src/pgtkterm.c
+++ b/src/pgtkterm.c
@@ -7006,8 +7006,8 @@ #define NUM_ARGV 10
   /* smooth scroll setting */
-  dpyinfo->scroll.x_per_char = 2;
-  dpyinfo->scroll.y_per_line = 2;
+  dpyinfo->scroll.x_per_char = 1.0/5;
+  dpyinfo->scroll.y_per_line = 1.0/5;
   x_setup_pointer_blanking (dpyinfo);

Jindrich Makovicka

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