de.tif.jacob.screen.event
Class IOwnDrawElementEventHandler

java.lang.Object
  EventHandler
      de.tif.jacob.screen.event.GuiEventHandler
          de.tif.jacob.screen.event.IGroupMemberEventHandler
              de.tif.jacob.screen.event.IOwnDrawElementEventHandler

public abstract class IOwnDrawElementEventHandler
extends IGroupMemberEventHandler

Abstract event handler class for own draw areas. Derived implementations of this event handler class have to be used to "hook" application-specific business logic to own draw areas.

Field Summary

static java.lang.String	RCS_ID The internal revision control system id.
static java.lang.String	RCS_REV The internal revision control system id in short form.

Constructor Summary

IOwnDrawElementEventHandler()

Method Summary

abstract java.awt.Color	getTransparentColor() Returns the color which should be used as transparent color for the image.
abstract void	paint(IClientContext context, java.awt.Graphics graphics, java.awt.Dimension dimension) This hook method will be called, if the own draw area has to be refreshed.

Methods inherited from class de.tif.jacob.screen.event.IGroupMemberEventHandler

onGroupStatusChanged, onHide, onShow

Methods inherited from class de.tif.jacob.screen.event.GuiEventHandler

alert, alert, alert

Methods inherited from class java.lang.Object

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

Field Detail

RCS_ID

public static final transient java.lang.String RCS_ID

The internal revision control system id.

See Also:

Constant Field Values

RCS_REV

public static final transient java.lang.String RCS_REV

The internal revision control system id in short form.

See Also:

Constant Field Values

Constructor Detail

IOwnDrawElementEventHandler

public IOwnDrawElementEventHandler()

Method Detail

paint

public abstract void paint(IClientContext context,
                           java.awt.Graphics graphics,
                           java.awt.Dimension dimension)
                    throws java.lang.Exception

This hook method will be called, if the own draw area has to be refreshed. Therefore, the image within the own draw area has to be painted completely by means of this method.

Parameters:

context - The current client context

graphics - The graphics object to be used for all draw operations

dimension - The dimension of the own draw area

Throws:

java.lang.Exception

getTransparentColor

public abstract java.awt.Color getTransparentColor()
                                            throws java.lang.Exception

Returns the color which should be used as transparent color for the image.

Returns:

The transparent color for the image or null, if the image does not contain a transparent color.

Throws:

java.lang.Exception