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Draggable: Apply ui-draggable-dragging class prior to calculating dim…

…ensions. Fixes #8349 - Draggable: Incorrect dimensions used if .ui-draggable-dragging changes dimensions

(cherry picked from commit a0c18ea)
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1 parent f6019da commit 168a21d5ef3e0df0f03aa860ae798a8f7de35210 @non4eg non4eg committed with scottgonzalez May 24, 2012
Showing with 3 additions and 1 deletion.
  1. +3 −1 ui/jquery.ui.draggable.js
@@ -103,6 +103,8 @@ $.widget("ui.draggable", $.ui.mouse, {
//Create and append the visible helper
this.helper = this._createHelper(event);
+ this.helper.addClass("ui-draggable-dragging");
+
//Cache the helper size
this._cacheHelperProportions();
@@ -163,7 +165,7 @@ $.widget("ui.draggable", $.ui.mouse, {
if ($.ui.ddmanager && !o.dropBehaviour)
$.ui.ddmanager.prepareOffsets(this, event);
- this.helper.addClass("ui-draggable-dragging");
+
this._mouseDrag(event, true); //Execute the drag once - this causes the helper not to be visible before getting its correct position
//If the ddmanager is used for droppables, inform the manager that dragging has started (see #5003)

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