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  1. JDK
  2. JDK-4380088

Cannot drag and drop multiple items

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    • Icon: Enhancement Enhancement
    • Resolution: Duplicate
    • Icon: P4 P4
    • None
    • 1.2.2, 1.3.0
    • client-libs
    • generic, x86
    • generic, windows_nt, windows_2000



      Name: skT45625 Date: 10/17/2000


      java version "1.3.0"
      Java(TM) 2 Runtime Environment, Standard Edition (build 1.3.0-C)
      Java HotSpot(TM) Client VM (build 1.3.0-C, mixed mode)

      I'm using DnD in several lists and trees and ran across the problem that I
      cannot drag and drop more than one item at a time. I posted a message to your
      forums and came to the conclusion that there is no fix and I discovered that
      many more people ran into this same problem as far back as a year ago. Here is
      a quick analysis I posted to your swing forum ((1) is swing, (2) is awt):

      (1) The mouse listeners for lists and trees (and tables for that
      matter) select an item on the mouse down (left button, no
      modifiers). This is a major nuisance during dragging since if
      you have a multiple selection and want to drag this multiple
      selection, you can't because it turns into a single selection as
      soon as your mouse button goes down. The solution would be to
      carefully craft the behavior such that for a simple selection
      (left button, no modifiers) the selection is not done until the
      mouse up. But that would require rewriting the mouse listener
      in BasicListUI etc., which I'm not about to do (as far as I know
      there is no easy way to replace functionality like that because
      you end up replacing the UI, in which case you also lose the
      specializations like MetalListUI).

      (2) In lieu of rewriting the mouse listener mentioned above, you
      would expect that pressing the shift button and initiating a
      drag, but alas this does not work as the platform-specific
      DragGestureRecognizer refuses to initiate a drag with a shift
      button down (at least on Windows). Since these
      DragGestureRecognizers are peeled through the platform-specific
        ToolKit, I can't easily replace that one either (there is no
      source code for the recognizers).

      Thanks,

      -Jaap-

      PS: Using Control + Shift together does work up to a point, but alters the
      drag&drop operation and is not very intuitive. It also toggles the selected
        state of the last item you click on, which makes it even less desirable. I
      elected not to pursue this alternative.
      (Review ID: 110978)
      ======================================================================

            svioletsunw Scott Violet (Inactive)
            skondamasunw Suresh Kondamareddy (Inactive)
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