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  1. JDK
  2. JDK-4765280

RFE: Cannot drag out of a JFileChooser without first selecting a file

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    • Icon: Enhancement Enhancement
    • Resolution: Duplicate
    • Icon: P4 P4
    • None
    • 1.4.0
    • client-libs



      Name: sv35042 Date: 10/18/2002


      FULL PRODUCT VERSION :
      java version "1.4.0_01"
      Java(TM) 2 Runtime Environment, Standard Edition (build 1.4.0_01-
      b03)
      Java HotSpot(TM) Client VM (build 1.4.0_01-b03, mixed mode)

      FULL OPERATING SYSTEM VERSION : Microsoft Windows 2000 [Version
      5.00.2195]

      A DESCRIPTION OF THE PROBLEM :
      When dragging a file out of a JFileChooser, the file must first be
      selected. Selecting a file and dragging does not initiated a drag-and-drop
      operation.

      STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
      1. Show a JFileChooser
      2. Select a file, and without releasing the mouse
      button, try to drag it.
      3. DnD operation not started

      EXPECTED VERSUS ACTUAL BEHAVIOR :
      It should be possible to begin a drag without having to 1) select the file
      with a mouse click, and then 2) click the file again and drag.
      This is a
      semi-major usability issue for end-users, as this is behaviour deviates
      from expected drag-and-drop functionality.

      REPRODUCIBILITY :
      This bug can be reproduced always.

      ---------- BEGIN SOURCE ----------
      (any application showing a JFileChooser can be used)

      Analysis:

      This behaviour is due to
      the MouseInputHandler in the BasicListUI. It allows the user to click-and-drag to change the
      selection. During this operation, JList.setValueIsAdjusting() is set to true. The
      BasicJFileChooserUI uses a JList to show the list of files. When the TransferHandlers
      createTransferable() is called, the selection of the JList hasn't been updated yet, due to
      valueIsAdjusting being true.
      ---------- END SOURCE ----------

      CUSTOMER WORKAROUND :
      Create a custom TransferHandler that sets valueIsAdjusting to false
      before querying the selection, or use a custom ListUI that doen't change
      the selection while dragging.
      (Review ID: 153980)
      ======================================================================

            shickeysunw Shannon Hickey (Inactive)
            svioletsunw Scott Violet (Inactive)
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