com.alee.managers.drag

Class ComponentDragViewHandler<T extends javax.swing.JComponent>

java.lang.Object

com.alee.managers.drag.ComponentDragViewHandler<T>

All Implemented Interfaces:

DragViewHandler<T>

public abstract class ComponentDragViewHandler<T extends javax.swing.JComponent>
extends java.lang.Object
implements DragViewHandler<T>

Field Summary

Fields

Modifier and Type	Field and Description
protected java.awt.Point	location Initial mouse location on dragged component.
protected java.lang.ref.WeakReference<T>	reference Dragged object reference.

Constructor Summary

Constructors

Constructor and Description
ComponentDragViewHandler()

Method Summary

Modifier and Type	Method and Description
void	dragEnded(T object, java.awt.dnd.DragSourceDropEvent event) Notifies about drag operation end.
float	getSnapshotOpacity() Returns component snapshot opacity.
java.awt.image.BufferedImage	getView(T object, java.awt.dnd.DragSourceDragEvent event) Returns image object representation.
java.awt.Point	getViewRelativeLocation(T object, java.awt.dnd.DragSourceDragEvent event) Returns image object representation location relative to mouse location.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface com.alee.managers.drag.DragViewHandler

getObjectFlavor

Field Detail

location

protected java.awt.Point location

Initial mouse location on dragged component. Used to position component snapshot correctly under the mouse.

reference

protected java.lang.ref.WeakReference<T extends javax.swing.JComponent> reference

Dragged object reference.

Constructor Detail

ComponentDragViewHandler

public ComponentDragViewHandler()

Method Detail

getView

public java.awt.image.BufferedImage getView(T object,
                                            java.awt.dnd.DragSourceDragEvent event)

Description copied from interface: DragViewHandler

Returns image object representation. This method is called once per drag operation to initialize dragged object view.

Specified by:

getView in interface DragViewHandler<T extends javax.swing.JComponent>

Parameters:

object - object to create image representation for

event - drag source drag event

Returns:

image object representation

getSnapshotOpacity

public float getSnapshotOpacity()

Returns component snapshot opacity. By default snapshot is semi-transparent for usability purposes.

Returns:

component snapshot opacity

getViewRelativeLocation

public java.awt.Point getViewRelativeLocation(T object,
                                              java.awt.dnd.DragSourceDragEvent event)

Description copied from interface: DragViewHandler

Returns image object representation location relative to mouse location. This method is called each time image location should be updated.

Specified by:

getViewRelativeLocation in interface DragViewHandler<T extends javax.swing.JComponent>

Parameters:

object - object return image representation location for

event - drag source drag event

Returns:

image object representation location relative to mouse location

dragEnded

public void dragEnded(T object,
                      java.awt.dnd.DragSourceDropEvent event)

Description copied from interface: DragViewHandler

Notifies about drag operation end. This method is called once per drag operation.

Specified by:

dragEnded in interface DragViewHandler<T extends javax.swing.JComponent>

Parameters:

object - dragged object

event - drag source drop event