"
 COPYRIGHT (c) 1995 by Claus Gittinger
	      All Rights Reserved

 This software is furnished under a license and may be used
 only in accordance with the terms of that license and with the
 inclusion of the above copyright notice.   This software may not
 be provided or otherwise made available to, or used by, any
 other person.  No title to or ownership of the software is
 hereby transferred.
"


'From Smalltalk/X, Version:2.10.5 on 30-mar-1995 at 5:32:55 am'!

Object subclass:#KeyboardForwarder
	 instanceVariableNames:'sourceView destinationView'
	 classVariableNames:''
	 poolDictionaries:''
	 category:'Interface-Support'
!

!KeyboardForwarder class methodsFor:'documentation'!

version
"
$Header: /cvs/stx/stx/libview/KeyboardForwarder.st,v 1.1 1995-03-31 02:57:21 claus Exp $
"
!

documentation
"
    Instances of this class can be used as delegates to forward keyboard
    events to some other view.
    Notice, that delegates dont have to be instances of
    myself; any object with a protocol similar to mine can be used as
    a delegate. 
    (i.e. any object that responds to handlesKeyPress:view: / keyPress:x:y:view: etc.)

    Instance Variables:
	destinationView         <View>          the view which shall receive
						the forwarded keyboard events.
"
!

copyright
"
 COPYRIGHT (c) 1995 by Claus Gittinger
	      All Rights Reserved

 This software is furnished under a license and may be used
 only in accordance with the terms of that license and with the
 inclusion of the above copyright notice.   This software may not
 be provided or otherwise made available to, or used by, any
 other person.  No title to or ownership of the software is
 hereby transferred.
"

! !

!KeyboardForwarder class methodsFor:'instance creation'!

from:sourceView to:destinationView
    ^ self new sourceView:sourceView; destinationView:destinationView
!

to:destinationView
    ^ self new destinationView:destinationView
! !

!KeyboardForwarder methodsFor:'accessing'!

destinationView:aView
    destinationView := aView
!

sourceView:aView
    sourceView := aView
!

destinationView
    ^ destinationView
!

sourceView
    ^ sourceView
! !

!KeyboardForwarder methodsFor:'queries'!

handlesKeyPress:key inView:aView
    sourceView notNil ifTrue:[
	^ aView == sourceView
    ].
    ^ true


!

handlesKeyRelease:key inView:aView
    sourceView notNil ifTrue:[
	^ aView == sourceView
    ].
    ^ true
! !

!KeyboardForwarder methodsFor:'event forwarding'!

keyPress:key x:x y:y view:aView
    x < 0 ifTrue:[
	"
	 already delegated ... ignore
	"
	^ self
    ].

    destinationView keyPress:key x:-1 y:-1 
!

keyRelease:key x:x y:y view:aView
    x < 0 ifTrue:[
	"
	 already delegated ... ignore
	"
	^ self
    ].

    destinationView keyRelease:key x:-1 y:-1 
! !