From 850d52b6653f235740a3bae24d3ff1c3240aa9e0 Mon Sep 17 00:00:00 2001
From: piro <piro@599a83e7-65a4-db11-8015-0010dcdd6dc2>
Date: Mon, 6 Apr 2009 17:52:10 +0000
Subject: [PATCH] =?UTF-8?q?=E3=82=B9=E3=82=AF=E3=83=AD=E3=83=BC=E3=83=AB?=
 =?UTF-8?q?=E9=80=9F=E5=BA=A6=E3=82=92=E8=90=BD=E3=81=A8=E3=81=97=E3=81=9F?=
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git-svn-id: http://www.cozmixng.org/repos/piro/treestyletab/trunk@4051 599a83e7-65a4-db11-8015-0010dcdd6dc2
---
 content/treestyletab/treestyletabbrowser.js | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/content/treestyletab/treestyletabbrowser.js b/content/treestyletab/treestyletabbrowser.js
index 0820a4b0..0ea9bdee 100644
--- a/content/treestyletab/treestyletabbrowser.js
+++ b/content/treestyletab/treestyletabbrowser.js
@@ -2586,9 +2586,10 @@ TreeStyleTabBrowser.prototype = {
 		if (tabs.getAttribute('overflow') != 'true') return false;
 
 		var tabStrip = tabs.mTabstrip;
-		var pixels   = tabStrip.scrollIncrement;
 		var box      = tabs.boxObject;
+		var pixels;
 		if (this.isVertical) {
+			pixels = tabs.childNodes[0].boxObject.height * 0.5;
 			if (aEvent.screenY < box.screenY + this.autoScrollArea) {
 				pixels *= -1;
 			}
@@ -2597,6 +2598,7 @@ TreeStyleTabBrowser.prototype = {
 			}
 		}
 		else {
+			pixels = tabStrip.scrollIncrement;
 			var ltr = window.getComputedStyle(this.parentNode, null).direction == 'ltr';
 			if (aEvent.screenX < box.screenX + this.autoScrollArea) {
 				pixels *= -1;