Class DragRecognitionSupport


  • public class DragRecognitionSupport
    extends java.lang.Object
    Drag gesture recognition support for classes that have a TransferHandler. The gesture for a drag in this class is a mouse press followed by movement by DragSource.getDragThreshold() pixels. An instance of this class is maintained per AppContext, and the public static methods call into the appropriate instance.

    This is a c&p of core (package private) needed for BasicXListUI. It differs from core in that references to sun packages have been replaced.

    • a static method of SunDragSourceContextPeer has been copied into SwingXUtilities and is used here
    • the shared instance of this class is maintained in the UIManager instead of per appContext.
    Version:
    1.2 11/17/05
    Author:
    Shannon Hickey
    • Nested Class Summary

      Nested Classes 
      Modifier and Type Class Description
      static interface  DragRecognitionSupport.BeforeDrag
      This interface allows us to pass in a handler to mouseDragged, so that we can be notified immediately before a drag begins.
    • Method Summary

      All Methods Static Methods Concrete Methods 
      Modifier and Type Method Description
      static boolean mouseDragged​(java.awt.event.MouseEvent me, DragRecognitionSupport.BeforeDrag bd)
      Returns whether or not a drag gesture recognition is ongoing.
      static boolean mousePressed​(java.awt.event.MouseEvent me)
      Returns whether or not the event is potentially part of a drag sequence.
      static java.awt.event.MouseEvent mouseReleased​(java.awt.event.MouseEvent me)
      If a dnd recognition has been going on, return the MouseEvent that started the recognition.
      • Methods inherited from class java.lang.Object

        clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
    • Constructor Detail

      • DragRecognitionSupport

        public DragRecognitionSupport()
    • Method Detail

      • mousePressed

        public static boolean mousePressed​(java.awt.event.MouseEvent me)
        Returns whether or not the event is potentially part of a drag sequence.
      • mouseReleased

        public static java.awt.event.MouseEvent mouseReleased​(java.awt.event.MouseEvent me)
        If a dnd recognition has been going on, return the MouseEvent that started the recognition. Otherwise, return null.
      • mouseDragged

        public static boolean mouseDragged​(java.awt.event.MouseEvent me,
                                           DragRecognitionSupport.BeforeDrag bd)
        Returns whether or not a drag gesture recognition is ongoing.