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Listbox Drag-n-Drop

Can anyone tell the the recommended way of performing mutiple-item drag-n-drop from a MultiExtended listbox?

The problem is the ListBox selection isn't completed in the MouseDown event, when the drag starts, but in the MouseUp which follows. So neither of the following sequences behave as expected:

1) MouseDown Item 1, MouseUp, MouseDown Item 6, Drag, MouseUp

2) MouseDown Item 1, MouseUp, ShiftDown, MouseDown Item 6, Drag, MouseUp, ShiftUp.

Example 1 drags the wrong Item (1 instead of 6)
Example 2 highlights a range but only drags one item.

I tried programatticall y selecting and deselecting items (depending upon shift, ctrl and button combinations) but it's a lot of code, it still doesn't quite work right, and I'm just duplicating code already written into the ListBox control.

It shouldn't be this hard!

Nov 21 '05 #1
1 1537
Hi,

http://msdn.microsoft.com/library/de...mpDragDrop.asp
Ken
----------------------------
"andrew nott" <an****@radbour ne-dot.org> wrote in message
news:%2******** ********@TK2MSF TNGP14.phx.gbl. ..
Can anyone tell the the recommended way of performing mutiple-item
drag-n-drop from a MultiExtended listbox?

The problem is the ListBox selection isn't completed in the MouseDown event,
when the drag starts, but in the MouseUp which follows. So neither of the
following sequences behave as expected:

1) MouseDown Item 1, MouseUp, MouseDown Item 6, Drag, MouseUp

2) MouseDown Item 1, MouseUp, ShiftDown, MouseDown Item 6, Drag, MouseUp,
ShiftUp.

Example 1 drags the wrong Item (1 instead of 6)
Example 2 highlights a range but only drags one item.

I tried programatticall y selecting and deselecting items (depending upon
shift, ctrl and button combinations) but it's a lot of code, it still
doesn't quite work right, and I'm just duplicating code already written into
the ListBox control.

It shouldn't be this hard!
Nov 21 '05 #2

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