Module java.desktop
Package java.awt.dnd

Class MouseDragGestureRecognizer

java.lang.Object
java.awt.dnd.DragGestureRecognizer
java.awt.dnd.MouseDragGestureRecognizer
All Implemented Interfaces:
MouseListener, MouseMotionListener, Serializable, EventListener
public abstract class MouseDragGestureRecognizer extends DragGestureRecognizer implements MouseListener, MouseMotionListener
This abstract subclass of DragGestureRecognizer defines a DragGestureRecognizer for mouse-based gestures. Each platform implements its own concrete subclass of this class, available via the Toolkit.createDragGestureRecognizer() method, to encapsulate the recognition of the platform dependent mouse gesture(s) that initiate a Drag and Drop operation.

Mouse drag gesture recognizers should honor the drag gesture motion threshold, available through DragSource.getDragThreshold(). A drag gesture should be recognized only when the distance in either the horizontal or vertical direction between the location of the latest mouse dragged event and the location of the corresponding mouse button pressed event is greater than the drag gesture motion threshold.

Drag gesture recognizers created with DragSource.createDefaultDragGestureRecognizer(java.awt.Component, int, java.awt.dnd.DragGestureListener) follow this convention.

See Also:
DragGestureListener, DragGestureEvent, DragSource, Serialized Form

  • Constructor Details

    • MouseDragGestureRecognizer

      protected MouseDragGestureRecognizer​(DragSource ds, Component c, int act, DragGestureListener dgl)
      Construct a new MouseDragGestureRecognizer given the DragSource for the Component c, the Component to observe, the action(s) permitted for this drag operation, and the DragGestureListener to notify when a drag gesture is detected.
      Parameters:
      ds - The DragSource for the Component c
      c - The Component to observe
      act - The actions permitted for this Drag
      dgl - The DragGestureListener to notify when a gesture is detected

    • MouseDragGestureRecognizer

      protected MouseDragGestureRecognizer​(DragSource ds, Component c, int act)
      Construct a new MouseDragGestureRecognizer given the DragSource for the Component c, the Component to observe, and the action(s) permitted for this drag operation.
      Parameters:
      ds - The DragSource for the Component c
      c - The Component to observe
      act - The actions permitted for this drag

    • MouseDragGestureRecognizer

      protected MouseDragGestureRecognizer​(DragSource ds, Component c)
      Construct a new MouseDragGestureRecognizer given the DragSource for the Component c, and the Component to observe.
      Parameters:
      ds - The DragSource for the Component c
      c - The Component to observe

    • MouseDragGestureRecognizer

      protected MouseDragGestureRecognizer​(DragSource ds)
      Construct a new MouseDragGestureRecognizer given the DragSource for the Component.
      Parameters:
      ds - The DragSource for the Component

  • Method Details

    • registerListeners

      protected void registerListeners()
      register this DragGestureRecognizer's Listeners with the Component
      Specified by:
      registerListeners in class DragGestureRecognizer

    • unregisterListeners

      protected void unregisterListeners()
      unregister this DragGestureRecognizer's Listeners with the Component subclasses must override this method
      Specified by:
      unregisterListeners in class DragGestureRecognizer

    • mouseClicked

      public void mouseClicked​(MouseEvent e)
      Invoked when the mouse has been clicked on a component.
      Specified by:
      mouseClicked in interface MouseListener
      Parameters:
      e - the MouseEvent

    • mousePressed

      public void mousePressed​(MouseEvent e)
      Invoked when a mouse button has been pressed on a Component.
      Specified by:
      mousePressed in interface MouseListener
      Parameters:
      e - the MouseEvent

    • mouseReleased

      public void mouseReleased​(MouseEvent e)
      Invoked when a mouse button has been released on a component.
      Specified by:
      mouseReleased in interface MouseListener
      Parameters:
      e - the MouseEvent

    • mouseEntered

      public void mouseEntered​(MouseEvent e)
      Invoked when the mouse enters a component.
      Specified by:
      mouseEntered in interface MouseListener
      Parameters:
      e - the MouseEvent

    • mouseExited

      public void mouseExited​(MouseEvent e)
      Invoked when the mouse exits a component.
      Specified by:
      mouseExited in interface MouseListener
      Parameters:
      e - the MouseEvent

    • mouseDragged

      public void mouseDragged​(MouseEvent e)
      Invoked when a mouse button is pressed on a component.
      Specified by:
      mouseDragged in interface MouseMotionListener
      Parameters:
      e - the MouseEvent

    • mouseMoved

      public void mouseMoved​(MouseEvent e)
      Invoked when the mouse button has been moved on a component (with no buttons no down).
      Specified by:
      mouseMoved in interface MouseMotionListener
      Parameters:
      e - the MouseEvent