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## com.bbn.openmap.tools.dnd
Class DropListenerSupport

    java.lang.Object
      com.bbn.openmap.tools.dnd.DropListenerSupport

All Implemented Interfaces:
  java.beans.beancontext.BeanContextChild, java.beans.beancontext.BeanContextMembershipListener, java.util.EventListener, java.awt.event.MouseListener, java.awt.event.MouseMotionListener, java.beans.PropertyChangeListener, java.io.Serializable, SoloMapComponent

public class DropListenerSupport
extends java.lang.Object
implements java.beans.PropertyChangeListener, java.io.Serializable, java.beans.beancontext.BeanContextChild, java.beans.beancontext.BeanContextMembershipListener, SoloMapComponent, java.awt.event.MouseListener, java.awt.event.MouseMotionListener

The DropListenerSupport manages the DefaultDnDCatchers that handle Drag and Drop events on the map. There should only be one DropListenerSupport within a MapHandler. DropListenerSupport keeps a list of all DefaultDnDCatcher objects from a MapHandler. It adds itself to the MapBean as MouseListener and MouseMotionListener. On MousePressed, MouseDragged, and MouseReleased events it loops through the DnDCatchers and invokes a consume() method in each of them.

See Also:
  `DefaultDnDCatcher`, Serialized Form

Field Summary
`protected java.beans.beancontext.BeanContextChildSupport` | `beanContextChildSupport` BeanContextChildSupport object provides helper functions for BeanContextChild interface.
`protected java.util.Vector` | `dndCatchers` Holds a list of DefaultDndCatchers
`protected MapBean` | `map` The MapBean.
`protected java.beans.PropertyChangeSupport` | `pcSupport` PropertyChangeSupport for handling listeners.

Constructor Summary
`DropListenerSupport()` Construct a DropListenerSupport without an associated MapBean.
`DropListenerSupport(MapBean map)` Construct a DropListenerSupport with an associated MapBean.

Method Summary
`void` | `addPropertyChangeListener(java.beans.PropertyChangeListener listener)`
`void` | `addPropertyChangeListener(java.lang.String propertyName, java.beans.PropertyChangeListener in_pcl)` Method for BeanContextChild interface.
`void` | `addVetoableChangeListener(java.lang.String propertyName, java.beans.VetoableChangeListener in_vcl)` Method for BeanContextChild interface.
`void` | `childrenAdded(java.beans.beancontext.BeanContextMembershipEvent bcme)` BeanContextMembershipListener method.
`void` | `childrenRemoved(java.beans.beancontext.BeanContextMembershipEvent bcme)` BeanContextMembershipListener method.
`void` | `findAndInit(java.util.Iterator it)` Eventually gets called when the DropListenerSupport is added to the BeanContext, and when other objects are added to the BeanContext anytime after that.
`void` | `findAndInit(java.lang.Object someObj)` Called when an object should be evaluated by the DropListenerSupport to see if it is needed.
`void` | `findAndUndo(java.lang.Object someObj)` Called by childrenRemoved.
`void` | `firePropertyChange(java.lang.String property, java.lang.Object oldObj, java.lang.Object newObj)`
`void` | `fireVetoableChange(java.lang.String name, java.lang.Object oldValue, java.lang.Object newValue)` Report a vetoable property update to any registered listeners.
`java.beans.beancontext.BeanContext` | `getBeanContext()` Method for BeanContextChild interface.
`MapBean` | `getMap()` Get the associated MapBean.
`void` | `mouseClicked(java.awt.event.MouseEvent e)` Invoked when the mouse has been clicked on a component.
`void` | `mouseDragged(java.awt.event.MouseEvent e)` Invoked when a mouse button is pressed on a component and then dragged.
`void` | `mouseEntered(java.awt.event.MouseEvent e)` Invoked when the mouse enters a component.
`void` | `mouseExited(java.awt.event.MouseEvent e)` Invoked when the mouse exits a component.
`void` | `mouseMoved(java.awt.event.MouseEvent e)` Invoked when the mouse button has been moved on a component (with no buttons no down).
`void` | `mousePressed(java.awt.event.MouseEvent e)` Invoked when a mouse button has been pressed on a component.
`void` | `mouseReleased(java.awt.event.MouseEvent e)` Invoked when a mouse button has been released on a component.
`void` | `propertyChange(java.beans.PropertyChangeEvent evt)` PropertyChangeListenter Interface method.
`void` | `removePropertyChangeListener(java.beans.PropertyChangeListener listener)`
`void` | `removePropertyChangeListener(java.lang.String propertyName, java.beans.PropertyChangeListener in_pcl)` Method for BeanContextChild interface.
`void` | `removeVetoableChangeListener(java.lang.String propertyName, java.beans.VetoableChangeListener in_vcl)` Method for BeanContextChild interface.
`void` | `setBeanContext(java.beans.beancontext.BeanContext in_bc)` Method for BeanContextChild interface.
`void` | `setMap(MapBean mapbean)` Set the associated MapBean.

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Field Detail

### dndCatchers

    protected transient java.util.Vector dndCatchers

  Holds a list of DefaultDndCatchers

### map

    protected transient MapBean map

  The MapBean.

### pcSupport

    protected java.beans.PropertyChangeSupport pcSupport

  PropertyChangeSupport for handling listeners.

### beanContextChildSupport

    protected java.beans.beancontext.BeanContextChildSupport beanContextChildSupport

  BeanContextChildSupport object provides helper functions for BeanContextChild interface.

Constructor Detail

### DropListenerSupport

    public DropListenerSupport()

  Construct a DropListenerSupport without an associated MapBean. You will need to set the MapBean via `setMap()`.

See Also:
  `setMap(com.bbn.openmap.MapBean)`

### DropListenerSupport

    public DropListenerSupport(MapBean map)

  Construct a DropListenerSupport with an associated MapBean.

Parameters:
  `map` - MapBean

Method Detail

### addPropertyChangeListener

    public void addPropertyChangeListener(java.beans.PropertyChangeListener listener)

### addPropertyChangeListener

    public void addPropertyChangeListener(java.lang.String propertyName,
                                          java.beans.PropertyChangeListener in_pcl)

  Method for BeanContextChild interface.

  Specified by:
    `addPropertyChangeListener` in interface `java.beans.beancontext.BeanContextChild`

### addVetoableChangeListener

    public void addVetoableChangeListener(java.lang.String propertyName,
                                          java.beans.VetoableChangeListener in_vcl)

  Method for BeanContextChild interface.

  Specified by:
    `addVetoableChangeListener` in interface `java.beans.beancontext.BeanContextChild`

### childrenAdded

    public void childrenAdded(java.beans.beancontext.BeanContextMembershipEvent bcme)

  BeanContextMembershipListener method. Called when new objects are added to the parent BeanContext.

  Specified by:
    `childrenAdded` in interface `java.beans.beancontext.BeanContextMembershipListener`
  Parameters:
    `bcme` - event that contains an iterator that can be used to go through the new objects.

### childrenRemoved

    public void childrenRemoved(java.beans.beancontext.BeanContextMembershipEvent bcme)

  BeanContextMembershipListener method. Called when objects have been removed from the parent BeanContext. The DropListenerSupport looks for the MapBean it is managing MouseEvents for, and any DefaultDndCatchers that may be removed.

  Specified by:
    `childrenRemoved` in interface `java.beans.beancontext.BeanContextMembershipListener`
  Parameters:
    `bcme` - event that contains an iterator that can be used to go through the removed objects.

### findAndInit

    public void findAndInit(java.lang.Object someObj)

  Called when an object should be evaluated by the DropListenerSupport to see if it is needed.

### findAndInit

    public void findAndInit(java.util.Iterator it)

  Eventually gets called when the DropListenerSupport is added to the BeanContext, and when other objects are added to the BeanContext anytime after that. The DropListenerSupport looks for a MapBean to manage MouseEvents for, and DefaultDndCatchers to use to manage those events. If a MapBean is added to the BeanContext while another already is in use, the second MapBean will take the place of the first.

  Parameters:
    `it` - iterator to use to go through the new objects in the BeanContext.

### findAndUndo

    public void findAndUndo(java.lang.Object someObj)

  Called by childrenRemoved.

### firePropertyChange

    public void firePropertyChange(java.lang.String property,
                                   java.lang.Object oldObj,
                                   java.lang.Object newObj)

### fireVetoableChange

    public void fireVetoableChange(java.lang.String name,
                                   java.lang.Object oldValue,
                                   java.lang.Object newValue)
                            throws java.beans.PropertyVetoException

  Report a vetoable property update to any registered listeners. If anyone vetos the change, then fire a new event reverting everyone to the old value and then rethrow the PropertyVetoException.

  No event is fired if old and new are equal and non-null.

  Parameters:
    `name` - The programmatic name of the property that is about to change
    `oldValue` - The old value of the property
    `newValue` - - The new value of the property
  Throws:
    `java.beans.PropertyVetoException` - if the recipient wishes the property change to be rolled back.

### getBeanContext

    public java.beans.beancontext.BeanContext getBeanContext()

  Method for BeanContextChild interface.

  Specified by:
    `getBeanContext` in interface `java.beans.beancontext.BeanContextChild`

### getMap

    public MapBean getMap()

  Get the associated MapBean.

  Returns:
    MapBean

### mouseClicked

    public void mouseClicked(java.awt.event.MouseEvent e)

  Invoked when the mouse has been clicked on a component.

  Specified by:
    `mouseClicked` in interface `java.awt.event.MouseListener`

### mouseDragged

    public void mouseDragged(java.awt.event.MouseEvent e)

  Invoked when a mouse button is pressed on a component and then dragged. Mouse drag events will continue to be delivered to the component where the first originated until the mouse button is released (regardless of whether the mouse position is within the bounds of the component).

  Specified by:
    `mouseDragged` in interface `java.awt.event.MouseMotionListener`

### mouseEntered

    public void mouseEntered(java.awt.event.MouseEvent e)

  Invoked when the mouse enters a component.

  Specified by:
    `mouseEntered` in interface `java.awt.event.MouseListener`

### mouseExited

    public void mouseExited(java.awt.event.MouseEvent e)

  Invoked when the mouse exits a component.

  Specified by:
    `mouseExited` in interface `java.awt.event.MouseListener`

### mouseMoved

    public void mouseMoved(java.awt.event.MouseEvent e)

  Invoked when the mouse button has been moved on a component (with no buttons no down).

  Specified by:
    `mouseMoved` in interface `java.awt.event.MouseMotionListener`

### mousePressed

    public void mousePressed(java.awt.event.MouseEvent e)

  Invoked when a mouse button has been pressed on a component.

  Specified by:
    `mousePressed` in interface `java.awt.event.MouseListener`

### mouseReleased

    public void mouseReleased(java.awt.event.MouseEvent e)

  Invoked when a mouse button has been released on a component.

  Specified by:
    `mouseReleased` in interface `java.awt.event.MouseListener`

### propertyChange

    public void propertyChange(java.beans.PropertyChangeEvent evt)

  PropertyChangeListenter Interface method.

  Specified by:
    `propertyChange` in interface `java.beans.PropertyChangeListener`
  Parameters:
    `evt` - PropertyChangeEvent

### removePropertyChangeListener

    public void removePropertyChangeListener(java.beans.PropertyChangeListener listener)

### removePropertyChangeListener

    public void removePropertyChangeListener(java.lang.String propertyName,
                                             java.beans.PropertyChangeListener in_pcl)

  Method for BeanContextChild interface.

  Specified by:
    `removePropertyChangeListener` in interface `java.beans.beancontext.BeanContextChild`

### removeVetoableChangeListener

    public void removeVetoableChangeListener(java.lang.String propertyName,
                                             java.beans.VetoableChangeListener in_vcl)

  Method for BeanContextChild interface.

  Specified by:
    `removeVetoableChangeListener` in interface `java.beans.beancontext.BeanContextChild`

### setBeanContext

    public void setBeanContext(java.beans.beancontext.BeanContext in_bc)
                        throws java.beans.PropertyVetoException

  Method for BeanContextChild interface.

  Specified by:
    `setBeanContext` in interface `java.beans.beancontext.BeanContextChild`
  Throws:
    `java.beans.PropertyVetoException`

### setMap

    public void setMap(MapBean mapbean)

  Set the associated MapBean.

  Parameters:
    `mapbean` - MapBean

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