From d066ad775d0097d4ea2e367e6fe0cd05a3dad267 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?J=C3=BCrg=20Lehni?= <juerg@scratchdisk.com>
Date: Wed, 16 Nov 2011 23:18:27 +0100
Subject: [PATCH] Implement Item#onClick and #onDoubleClick.

---
 src/ui/CanvasView.js | 21 ++++++++++++++++++---
 1 file changed, 18 insertions(+), 3 deletions(-)

diff --git a/src/ui/CanvasView.js b/src/ui/CanvasView.js
index 367aaa98..a2d09d72 100644
--- a/src/ui/CanvasView.js
+++ b/src/ui/CanvasView.js
@@ -84,15 +84,30 @@ var CanvasView = View.extend(/** @lends CanvasView# */{
 		}
 	}
 
-	var overItem = null;
+	var downPoint,
+		downItem,
+		overItem,
+		doubleClick,
+		clickTime;
 
 	return {
 		_onMouseDown: function(event, point) {
-			handleEvent(this, 'mousedown', event, point);
+			var item = handleEvent(this, 'mousedown', event, point);
+			// See if we're clicking again on the same item, within the
+			// double-click time. Firefox uses 300ms as the max time difference:
+			doubleClick = downItem == item && Date.now() - clickTime < 300;
+			downItem = item;
+			downPoint = point;
 		},
 
 		_onMouseUp: function(event, point) {
-			handleEvent(this, 'mouseup', event, point);
+			var item = handleEvent(this, 'mouseup', event, point);
+			if (item == downItem) {
+				clickTime = Date.now();
+				new MouseEvent(doubleClick ? 'doubleclick' : 'click', downPoint,
+						overItem, event)._call();
+				doubleClick = false;
+			}
 		},
 
 		_onMouseMove: function(event, point) {