From 122b80799249be33e66a4f716fdca6d80635a05e Mon Sep 17 00:00:00 2001
From: Gabriele Mazzotta <gabriele.mzt@gmail.com>
Date: Sat, 15 Nov 2014 15:05:06 +0100
Subject: gitk: Enable mouse horizontal scrolling in diff pane

Currently it's required to hold Shift and scroll up and down to move
horizontally. Listen to Button-6 and Button-7 events too to make
horizontal scrolling handier with touchpads and some mice.

Signed-off-by: Gabriele Mazzotta <gabriele.mzt@gmail.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
---
 gitk | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/gitk b/gitk
index 462f966948..d42f28340f 100755
--- a/gitk
+++ b/gitk
@@ -2516,6 +2516,13 @@ proc makewindow {} {
     } else {
 	bindall <ButtonRelease-4> "allcanvs yview scroll -5 units"
 	bindall <ButtonRelease-5> "allcanvs yview scroll 5 units"
+	bind $ctext <Button> {
+	    if {"%b" eq 6} {
+		$ctext xview scroll -5 units
+	    } elseif {"%b" eq 7} {
+		$ctext xview scroll 5 units
+	    }
+	}
         if {[tk windowingsystem] eq "aqua"} {
             bindall <MouseWheel> {
                 set delta [expr {- (%D)}]
-- 
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