From 847e8f06107293254606d499aeb3e8a2006b9b78 Mon Sep 17 00:00:00 2001
From: Paul Davis <paul@linuxaudiosystems.com>
Date: Mon, 4 Apr 2011 22:26:03 +0000
Subject: [PATCH] add some scroll wheel support to the scroomer

git-svn-id: svn://localhost/ardour2/branches/3.0@9287 d708f5d6-7413-0410-9779-e7cbd77b26cf
---
 libs/gtkmm2ext/scroomer.cc | 23 +++++++++++++++++------
 1 file changed, 17 insertions(+), 6 deletions(-)

diff --git a/libs/gtkmm2ext/scroomer.cc b/libs/gtkmm2ext/scroomer.cc
index 40892301bc..3009449c91 100644
--- a/libs/gtkmm2ext/scroomer.cc
+++ b/libs/gtkmm2ext/scroomer.cc
@@ -202,6 +202,23 @@ Scroomer::on_motion_notify_event (GdkEventMotion* ev)
 	return true;
 }
 
+bool
+Scroomer::on_scroll_event (GdkEventScroll* ev)
+{
+	switch (ev->direction) {
+	case GDK_SCROLL_UP:
+		adj.set_value (adj.get_value() - adj.get_page_size()/10.0);
+		break;
+	case GDK_SCROLL_DOWN:
+		adj.set_value (adj.get_value() + adj.get_page_size()/10.0);
+		break;
+	default:
+		return false;
+	}
+
+	return true;
+}
+
 bool
 Scroomer::on_button_press_event (GdkEventButton* ev)
 {
@@ -267,12 +284,6 @@ Scroomer::on_button_release_event (GdkEventButton* ev)
 	return true;
 }
 
-bool
-Scroomer::on_scroll_event (GdkEventScroll*)
-{
-	return true;
-}
-
 void
 Scroomer::on_size_allocate (Allocation& a)
 {