Ext JS 3.4.4.1: Drag & Drop broken

[berniesaurus]

Ext version tested:
Ext 3.4.1.1 (Ext 3.4.0 works fine)

Browser versions tested against:
Chrome 27
FF 21
IE 9
IE 10

Description:
Drag & Drop works fine as long as all registered DropZones still exist in the DOM.
But this isn't always the case, just think of closable Ext.TabPanel or Ext.Window. So if you have a drop-target in a window or in a tab panel, and then you close the window/panel and then start a drag operation (eg. from a tree panel) it will break.

Fix:

This should do the trick:

Ext.dd.DragDropMgr.getZIndex = function(element) {
    var body = document.body,
        z,
        zIndex = -1;
    var overTargetEl = element;

    element = Ext.getDom(element);
    while (element !== body) {

        // this fixes the problem
        if(!element) {
            this._remove(overTargetEl); // remove the drop target from the manager
            break;
        }
        // fix end

        if (!isNaN(z = Number(Ext.fly(element).getStyle('zIndex')))) {
            zIndex = z;
        }
        element = element.parentNode;
    }
    return zIndex;
};

[mitchellsimoens]

Thanks for the report! I have opened a bug in our bug tracker.

[uwolfer]

I can confim this issue. Thanks for the fix - works well.