After reading all the comments added on the Drag n’ Drop Tree component made some time ago I spent some time to make a small component which is capable to manage drag and drop between almost all the Macromedia builtins component (such as List, DrataGrid, Tree…).
It requires Flash 8 to work because I’m using BitmapData for clone the dragged item (wow, this is incredible easy to do now 🙂 )
You can see a demo here: DraggableController.html
This is the code used in the .fla, in order to manage the component events:

/**
Setting up the list of relationship between components
**/
dc.AddReference(this._datagrid_1, this._list_1)
dc.AddReference(this._datagrid_1, this._datagrid_2)
dc.AddReference(this._datagrid_1, this._tree_1)
dc.AddReference(this._datagrid_1, this._datagrid_1)
dc.AddReference(this._list_1, this._list_2)
dc.AddReference(this._list_1, this._text_ctrl_1)
dc.AddReference(this._text_ctrl_2, this._list_2)
dc.AddReference(this._tree_1, this._list_2)
dc.AddReference(this._tree_1, this._text_ctrl_2)
dc.AddReference(this._tree_1, this._text_area_1)
dc.AddReference(this._list_2, this._text_area_1)
/** drag complete listener **/
dc.addEventListener("drag_complete", this)
/**
evt:
- target_component = drop destination component
- source_component = drag n' drop source component
- source_item      = item dragged
- source_index     = selectedIndex of the source component
- target_item      = drop destination item inside target_component
- target_index     = drop destination index
IMPORTANT: once received evt you must Veto() or Skip() the evt itself.
evt.Skip() will simply remove the dragging movieclip
evt.Veto() will move back the dragging item to its source
*/
function drag_complete(evt:Object):Void{
if(evt.target_component == _list_1){
evt.Veto()
} else if(evt.target_component == _datagrid_2 or evt.target_component == _datagrid_1){
evt.source_component.removeItemAt(evt.source_index)
evt.target_component.addItemAt(evt.target_index, evt.source_item)
Selection.setFocus(null)
evt.target_component.selectRow(evt.target_index, false, false)
evt.Skip()
} else if(evt.target_component == _tree_1){
evt.source_component.removeItemAt(evt.source_index)
var node:XMLNode = new XMLNode(1, "node")
node.attributes.label = evt.source_item.title +  "(Cloned)"
node.attributes.data = evt.source_item
evt.target_item.appendChild(node)
evt.Skip()
} else if(evt.target_component == _text_ctrl_1){
evt.source_component.removeItemAt(evt.source_index)
evt.target_component.text = evt.source_item.label
evt.Skip()
} else if(evt.target_component == _list_2 && evt.source_component == _tree_1){
evt.source_item.removeNode()
evt.source_component.dataProvider = evt.source_component.getDataProvider()
evt.target_component.addItemAt(evt.target_index, evt.source_item.attributes.label)
evt.Skip()
} else if(evt.target_component == _text_area_1 && evt.source_component == _list_2){
evt.source_component.removeItemAt(evt.source_index)
evt.target_component.text = evt.source_item.label
evt.Skip()
} else if(evt.target_component == _text_area_1 && evt.source_component == _tree_1){
evt.source_item.removeNode()
evt.source_component.dataProvider = evt.source_component.getDataProvider()
evt.target_component.text = evt.source_item
evt.Skip()
} else {
evt.Veto()
}
}

The .zip with all the file is available here, if anyone want to test and improve it.

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