From 915175c94c448cad141aa78f5851793d7fc4d868 Mon Sep 17 00:00:00 2001
From: Ning Shi <cs_snx@stu.ust.hk>
Date: Sat, 29 Mar 2008 15:14:35 +0800
Subject: [PATCH] Fixed a bug causing canvas to disappear after dragging on a
 branch.

---
 gtk/src/tree_model.cpp | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/gtk/src/tree_model.cpp b/gtk/src/tree_model.cpp
index aeb3850..0e3b6f3 100644
--- a/gtk/src/tree_model.cpp
+++ b/gtk/src/tree_model.cpp
@@ -685,7 +685,11 @@ bool TreeModel::on_eventbox_motion_notify_event(GdkEventMotion *event)
 		_dragging_edge->drag(x, y);
 
 		_invalidate();
-	} else if (_dragging_node && _dragging_node->get_nonterminal().is_leaf()) {
+	} else if (_dragging_node) {
+		if (!_dragging_node->get_nonterminal().is_leaf()) {
+			return true;
+		}
+
 		_is_draw_indicator = true;
 		dynamic_cast<Leaf *>(_dragging_node)->drag(x, y);
 
-- 
2.11.4.GIT