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Java Standard Edition (SE)

DragSourceEvent


java.awt.dnd

Class DragSourceEvent

  • All Implemented Interfaces:
    Serializable
    Direct Known Subclasses:
    DragSourceDragEvent, DragSourceDropEvent


    public class DragSourceEvent
    extends EventObject
    This class is the base class for DragSourceDragEvent and DragSourceDropEvent.

    DragSourceEvents are generated whenever the drag enters, moves over, or exits a drop site, when the drop action changes, and when the drag ends. The location for the generated DragSourceEvent specifies the mouse cursor location in screen coordinates at the moment this event occurred.

    In a multi-screen environment without a virtual device, the cursor location is specified in the coordinate system of the initiator GraphicsConfiguration. The initiator GraphicsConfiguration is the GraphicsConfiguration of the Component on which the drag gesture for the current drag operation was recognized. If the cursor location is outside the bounds of the initiator GraphicsConfiguration, the reported coordinates are clipped to fit within the bounds of that GraphicsConfiguration.

    In a multi-screen environment with a virtual device, the location is specified in the corresponding virtual coordinate system. If the cursor location is outside the bounds of the virtual device the reported coordinates are clipped to fit within the bounds of the virtual device.

    Since:
    1.2
    See Also:
    Serialized Form
    • Constructor Summary

      Constructors 
      Constructor and Description
      DragSourceEvent(DragSourceContext dsc)
      Construct a DragSourceEvent given a specified DragSourceContext.
      DragSourceEvent(DragSourceContext dsc, int x, int y)
      Construct a DragSourceEvent given a specified DragSourceContext, and coordinates of the cursor location.
    • Method Summary

      All Methods Instance Methods Concrete Methods 
      Modifier and Type Method and Description
      DragSourceContext getDragSourceContext()
      This method returns the DragSourceContext that originated the event.
      Point getLocation()
      This method returns a Point indicating the cursor location in screen coordinates at the moment this event occurred, or null if the cursor location is not specified for this event.
      int getX()
      This method returns the horizontal coordinate of the cursor location in screen coordinates at the moment this event occurred, or zero if the cursor location is not specified for this event.
      int getY()
      This method returns the vertical coordinate of the cursor location in screen coordinates at the moment this event occurred, or zero if the cursor location is not specified for this event.
    • Constructor Detail

      • DragSourceEvent

        public DragSourceEvent(DragSourceContext dsc)
        Construct a DragSourceEvent given a specified DragSourceContext. The coordinates for this DragSourceEvent are not specified, so getLocation will return null for this event.
        Parameters:
        dsc - the DragSourceContext
        Throws:
        IllegalArgumentException - if dsc is null.
        See Also:
        getLocation()
      • DragSourceEvent

        public DragSourceEvent(DragSourceContext dsc,
                               int x,
                               int y)
        Construct a DragSourceEvent given a specified DragSourceContext, and coordinates of the cursor location.
        Parameters:
        dsc - the DragSourceContext
        x - the horizontal coordinate for the cursor location
        y - the vertical coordinate for the cursor location
        Throws:
        IllegalArgumentException - if dsc is null.
        Since:
        1.4
    • Method Detail

      • getDragSourceContext

        public DragSourceContext getDragSourceContext()
        This method returns the DragSourceContext that originated the event.

        Returns:
        the DragSourceContext that originated the event
      • getLocation

        public Point getLocation()
        This method returns a Point indicating the cursor location in screen coordinates at the moment this event occurred, or null if the cursor location is not specified for this event.
        Returns:
        the Point indicating the cursor location or null if the cursor location is not specified
        Since:
        1.4
      • getX

        public int getX()
        This method returns the horizontal coordinate of the cursor location in screen coordinates at the moment this event occurred, or zero if the cursor location is not specified for this event.
        Returns:
        an integer indicating the horizontal coordinate of the cursor location or zero if the cursor location is not specified
        Since:
        1.4
      • getY

        public int getY()
        This method returns the vertical coordinate of the cursor location in screen coordinates at the moment this event occurred, or zero if the cursor location is not specified for this event.
        Returns:
        an integer indicating the vertical coordinate of the cursor location or zero if the cursor location is not specified
        Since:
        1.4


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