[PATCH v2] gitk: Add a horizontal scrollbar for commit history

[Nicolas Cornu <ncornu@aldebaran-robotics.com>]

This scrollbar is not optional and is useful if there is a lot of tags or
branches.

Signed-off-by: Nicolas Cornu <ncornu@aldebaran-robotics.com>
---
 gitk | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/gitk b/gitk
index 5cd00d8..62563b1 100755
--- a/gitk
+++ b/gitk
@@ -2120,11 +2120,17 @@ proc makewindow {} {
     # create three canvases
     set cscroll .tf.histframe.csb
     set canv .tf.histframe.pwclist.canv
+    set cscrollhl .tf.histframe.pwclist.canv.csb
     canvas $canv \
 	-selectbackground $selectbgcolor \
 	-background $bgcolor -bd 0 \
-	-yscrollincr $linespc -yscrollcommand "scrollcanv $cscroll"
+	-yscrollincr $linespc -yscrollcommand "scrollcanv $cscroll" \
+	-xscrollcommand "scrollcanv $cscrollhl"
     .tf.histframe.pwclist add $canv
+    ${NS}::scrollbar $cscrollhl -command {$canv xview} -orient horizontal
+    if {!$use_ttk} {$cscrollhl configure -highlightthickness 0}
+    pack $cscrollhl -fill x -side bottom
+
     set canv2 .tf.histframe.pwclist.canv2
     canvas $canv2 \
 	-selectbackground $selectbgcolor \
--
1.8.4.2