SyncedMultiColumnTextView.st
author Claus Gittinger <cg@exept.de>
Fri, 24 Nov 1995 11:29:44 +0100
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child 102 f85d1c7ca56f
permissions -rw-r--r--
my logical size-of-contents changes if any subview changes its contents
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"
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 COPYRIGHT (c) 1995 by Claus Gittinger
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	      All Rights Reserved
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 This software is furnished under a license and may be used
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 only in accordance with the terms of that license and with the
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 inclusion of the above copyright notice.   This software may not
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 be provided or otherwise made available to, or used by, any
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 other person.  No title to or ownership of the software is
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 hereby transferred.
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'From Smalltalk/X, Version:2.10.8 on 20-nov-1995 at 14:11:21'                   !
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SimpleView subclass:#SyncedMultiColumnTextView
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	 instanceVariableNames:'textViews'
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	 classVariableNames:''
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	 poolDictionaries:''
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	 category:'Views-Text'
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!
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!SyncedMultiColumnTextView class methodsFor:'documentation'!
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copyright
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"
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 COPYRIGHT (c) 1995 by Claus Gittinger
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	      All Rights Reserved
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 This software is furnished under a license and may be used
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 only in accordance with the terms of that license and with the
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 inclusion of the above copyright notice.   This software may not
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 be provided or otherwise made available to, or used by, any
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 other person.  No title to or ownership of the software is
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 hereby transferred.
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"
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!
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documentation
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"
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    abstract superclass for multi-col textviews.
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    Scrolling is synced, by always scrolling all views.
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    This type of view is especially useful to show diff-lists,
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    code-versions, or other one-by-one viewable texts.
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    Usually, it does not make much sense, to put totally different
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    or unrelated texts into this kind of view.
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    See concrete examples as TwoColumnTextView, DiffTextView etc.
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!
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version
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^ '$Header: /cvs/stx/stx/libwidg2/SyncedMultiColumnTextView.st,v 1.2 1995-11-24 10:29:44 cg Exp $'
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! !
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!SyncedMultiColumnTextView methodsFor:'initialization'!
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initialize
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    |n wEach org crn|
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    super initialize.
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    n := self class numberOfViews.
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    textViews := Array new:n.
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    wEach := (1 / n) asFloat.
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    org := 0.0.
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    1 to:n do:[:i |
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	|textView|
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	i == n ifTrue:[
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	    crn := 1.0
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	] ifFalse:[
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	    crn := org + wEach
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	].
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	textView:= TextView 
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			origin:org @ 0.0
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			corner:crn @ 1.0
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			    in:self.
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	textView borderWidth:1.
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	textView level:0.
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	textView addDependent:self.
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	textViews at:i put:textView.
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	org := org + wEach
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    ].
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    "Created: 20.11.1995 / 13:06:16 / cg"
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    "Modified: 24.11.1995 / 11:08:31 / cg"
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! !
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!SyncedMultiColumnTextView methodsFor:'change & update'!
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update:something with:someArgument from:changedObject
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    "/
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    "/ if any of my views changes its contents,
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    "/ I have logically changed my contents -> to give scrollbar
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    "/ a chance to update
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    "/
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    something == #sizeOfContents ifTrue:[
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	self changed:something
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    ].
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    "Created: 24.11.1995 / 11:11:22 / cg"
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! !
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!SyncedMultiColumnTextView methodsFor:'queries'!
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heightOfContents
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    ^ textViews inject:0 into:[:maxSoFar :thisView | maxSoFar max:(thisView heightOfContents)]
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    "Created: 20.11.1995 / 13:08:25 / cg"
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!
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innerHeight 
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    ^ textViews inject:0 into:[:maxSoFar :thisView | maxSoFar max:(thisView innerHeight)]
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    "Created: 20.11.1995 / 13:08:42 / cg"
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!
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innerWidth 
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    ^ textViews inject:0 into:[:maxSoFar :thisView | maxSoFar max:(thisView innerWidth)]
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    "Created: 20.11.1995 / 13:08:49 / cg"
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!
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widthOfContents 
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    ^ textViews inject:0 into:[:maxSoFar :thisView | maxSoFar max:(thisView widthOfContents)]
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    "Created: 20.11.1995 / 13:08:59 / cg"
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!
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xOriginOfContents
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    ^ textViews inject:0 into:[:maxSoFar :thisView | maxSoFar max:(thisView xOriginOfContents)]
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    "Created: 20.11.1995 / 13:09:11 / cg"
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!
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yOriginOfContents
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    ^ textViews inject:0 into:[:maxSoFar :thisView | maxSoFar max:(thisView yOriginOfContents)]
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    "Created: 20.11.1995 / 13:09:18 / cg"
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! !
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!SyncedMultiColumnTextView methodsFor:'scrolling'!
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scrollDown
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    self scrollDown:1.
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    "Created: 20.11.1995 / 13:01:16 / cg"
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!
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scrollDown:nLines
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    textViews do:[:thisView | thisView scrollDown:nLines].
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    "Created: 20.11.1995 / 13:09:40 / cg"
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!
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scrollHorizontalToPercent:p
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    |v1|
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    (v1 := textViews at:1) scrollHorizontalToPercent:p.
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    textViews from:2 to:(textViews size) do:[:thisView | thisView scrollHorizontalTo:v1 xOriginOfContents]
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    "Created: 20.11.1995 / 13:12:16 / cg"
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!
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scrollLeft
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    textViews do:[:thisView | thisView scrollLeft].
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    "Created: 20.11.1995 / 13:09:40 / cg"
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    "Modified: 20.11.1995 / 13:15:45 / cg"
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!
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scrollLeft:nPixels
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    textViews do:[:thisView | thisView scrollLeft:nPixels].
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    "Created: 20.11.1995 / 13:09:40 / cg"
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    "Modified: 20.11.1995 / 13:15:49 / cg"
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!
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scrollRight
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    textViews do:[:thisView | thisView scrollRight].
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    "Created: 20.11.1995 / 13:09:40 / cg"
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    "Modified: 20.11.1995 / 13:15:39 / cg"
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!
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scrollRight:nPixels
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    textViews do:[:thisView | thisView scrollRight:nPixels].
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    "Created: 20.11.1995 / 13:09:40 / cg"
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    "Modified: 20.11.1995 / 13:15:27 / cg"
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!
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scrollToLine:lineNr
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    textViews do:[:thisView | thisView scrollToLine:lineNr].
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    "Created: 20.11.1995 / 13:09:40 / cg"
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    "Modified: 20.11.1995 / 13:15:07 / cg"
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!
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scrollUp
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    self scrollUp:1.
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    "Created: 20.11.1995 / 13:01:16 / cg"
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!
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scrollUp:nLines
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    textViews do:[:thisView | thisView scrollUp:nLines].
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    "Created: 20.11.1995 / 13:09:40 / cg"
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    "Modified: 20.11.1995 / 13:14:51 / cg"
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!
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scrollVerticalToPercent:p
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    |master max|
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    max := 0.
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    textViews do:[:thisView |
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	thisView heightOfContents > max ifTrue:[
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	    max := thisView heightOfContents.
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	    master := thisView
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	]
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    ].
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    textViews do:[:v |
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	v == master ifTrue:[
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	    master scrollVerticalToPercent:p.
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	] ifFalse:[
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	    v scrollToLine:master firstLineShown.
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	]
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    ]
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    "Created: 20.11.1995 / 13:14:41 / cg"
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! !
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