Droppable: Added dragStart and dragStop to ddmanager and call them from draggable to recalculate droppable positions after a drag causes a scroll. Fixes #5003 - Scroll on Droppable Demo Breaks Demo

(cherry picked from commit 67bd872fe1f8c4763d646f4eca852777e6f7a126)

1 files changed, 11 insertions, 0 deletions

diff --git a/ui/jquery.ui.droppable.js b/ui/jquery.ui.droppable.js
index b8a93cd46..58a1c4bc1 100644
--- a/ui/jquery.ui.droppable.js
+++ b/ui/jquery.ui.droppable.js
@@ -238,6 +238,12 @@ $.ui.ddmanager = {
 		return dropped;
 
 	},
+	dragStart: function( draggable, event ) {
+		//Listen for scrolling so that if the dragging causes scrolling the position of the droppables can be recalculated (see #5003)
+		draggable.element.parentsUntil( "body" ).bind( "scroll.droppable", function() {
+			if( !draggable.options.refreshPositions ) $.ui.ddmanager.prepareOffsets( draggable, event );
+		});
+	},
 	drag: function(draggable, event) {
 
 		//If you have a highly dynamic page, you might try this option. It renders positions every time you move the mouse.
@@ -279,6 +285,11 @@ $.ui.ddmanager = {
 			}
 		});
 
+	},
+	dragStop: function( draggable, event ) {
+		draggable.element.parentsUntil( "body" ).unbind( "scroll.droppable" );
+		//Call prepareOffsets one final time since IE does not fire return scroll events when overflow was caused by drag (see #5003)
+		if( !draggable.options.refreshPositions ) $.ui.ddmanager.prepareOffsets( draggable, event );
 	}
 };