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DhtmlxTreeGrid DragnDrop or DragnCopy using CTRL-Key

Hi,

we are using DhtmlxTreeGrid Professional. While dragging a Tree Item and holding down the CTRL-Key we want to Copy the Item instead of moving it.

there is a solution for DhtmlxTree (http://www.dhtmlx.com/docs/products/kb/index.shtml?cat=search&page=1&q=9732&ssr=yes&s=ctrl tree).

Is there an equal solution when using DhtmlxTreeGrid ?

Similar changes you should do in the dhtmlxgrid_drag.js file from the dhtmlxGrid package. 
Line
var text=this.callEvent("onBeforeDrag",[htmlObject.parentNode.idd,htmlObject._cellIndex]);
should be replaces with:
var text=this.callEvent("onBeforeDrag",[htmlObject.parentNode.idd,htmlObject._cellIndex,(e||event)]);

Now during treeGrid's init, the next code can be used:
mygrid.attachEvent("onBeforeDrag",function(id,ind,ev){
  this.enableMercyDrag(ev.ctrlKey)
  return true;
  });