IDragHandler IDragDropService.GetDragHandler(System.Windows.Forms.IDataObject data)
{
TreeListNode node = GetNode(data);
if (node != null && !data.GetDataPresent(typeof(DragDataObject)))
{
XRControl[] controls = GetTemplateControlsFromData(node);
DragDataObject obj = CreateDragData(controls, ZoomService.GetInstance(DesignerHost));
data.SetData(typeof(DragDataObject), obj);
return(new MyControlDragHandler(DesignerHost));
}
return(base.GetDragHandler(data));
}
//Note: GetdataPresent is not reliable for IDataObject that did not originate
//from .Net. This rtn is called if it did, but we still don't use GetdataPresent.
private void ProcessNetDataObject(System.Windows.Forms.IDataObject NetObject)
{
if (!(NetObject.GetData(typeof(ArrayList)) == null))
{
Type AllowedType = typeof(CShItem);
object oCSI;
foreach (object tempLoopVar_oCSI in NetObject.GetData(typeof(ArrayList)) as IEnumerable)
{
oCSI = tempLoopVar_oCSI;
if (!AllowedType.Equals(oCSI.GetType()))
{
m_Draglist = new ArrayList();
goto endOfForLoop;
}
else
{
m_Draglist.Add(oCSI);
}
}
endOfForLoop:
1.GetHashCode(); //nop
}
//Shell IDList Array is preferred to HDROP, see if we have one
if (!(NetObject.GetData("Shell IDList Array") == null))
{
//Get it and also mark that we had one
m_StreamCIDA = NetObject.GetData("Shell IDList Array") as MemoryStream;
//has one, ASSUME that it matchs what we may have gotten from
// ArrayList, if we had one of those
if (m_Draglist.Count < 1) //if we didn't have an ArrayList, have to build m_DragList
{
if (!MakeDragListFromCIDA()) //Could not make it
{
return; //leaving m_IsValid as false
}
}
}
//FileDrop is only used to build m_DragList if not already done
if (m_Draglist.Count < 1)
{
if (!(NetObject.GetData("FileDrop") == null))
{
string S;
foreach (string tempLoopVar_S in NetObject.GetData("FileDrop", true) as IEnumerable)
{
S = tempLoopVar_S;
try //if GetCShitem returns Nothing(it's failure marker) then catch it
{
m_Draglist.Add(ExpTreeLib.CShItem.GetCShItem(S));
}
catch (Exception ex) //Some problem, throw the whole thing away
{
Debug.WriteLine("CMyDataObject -- Error in creating CShItem for " + S + "\r\n" + "Error is: " + ex.ToString());
m_Draglist = new ArrayList();
}
}
}
}
//At this point we must have a valid m_DragList
if (m_Draglist.Count < 1)
{
return; //no list, not valid
}
//ensure that DataObject has a Shell IDList Array
if (m_StreamCIDA == null) //wouldn't be Nothing if it had one
{
m_StreamCIDA = MakeShellIDArray(m_Draglist);
NetObject.SetData("Shell IDList Array", true, m_StreamCIDA);
}
//At this point, we have a valid DragList and have ensured that the DataObject
// has a CIDA.
m_IsValid = true;
return;
}
/// <summary>
/// Stores the specified data in this instance, using the class of the data for the format.
/// </summary>
/// <param name="data">The data to store.</param>
public void SetData(object data)
{
_underlyingDataObject.SetData(data);
}
