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"
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5
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COPYRIGHT (c) 1989 by Claus Gittinger
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59
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All Rights Reserved
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0
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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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View subclass:#ScrollableView
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7
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instanceVariableNames:'scrolledView scrollBar helpView innerMargin
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scrollBarPosition lockUpdates'
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classVariableNames:''
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poolDictionaries:''
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category:'Views-Basic'
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!
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ScrollableView comment:'
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5
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COPYRIGHT (c) 1989 by Claus Gittinger
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59
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All Rights Reserved
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105
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$Header: /cvs/stx/stx/libwidg/ScrollableView.st,v 1.12 1995-03-18 05:15:55 claus Exp $
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'!
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!ScrollableView class methodsFor:'documentation'!
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copyright
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"
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COPYRIGHT (c) 1989 by Claus Gittinger
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59
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All Rights Reserved
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38
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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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version
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"
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$Header: /cvs/stx/stx/libwidg/ScrollableView.st,v 1.12 1995-03-18 05:15:55 claus Exp $
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"
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!
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documentation
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"
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a view containing a scrollbar and some other (slave-)view.
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This view wraps scrollbars around the view to be scrolled.
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The scrollbars are setup to send scrollUp/scrollDown/scrollVerticalTo
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and scrollLeft/scrollRight/scrollHorizontalTo- messages whenever moved.
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The view itself has to omplement these (there is a default implementation
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in the common View class for this.
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For the scrollbars to know about the full (maximum) size, the view
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must implement #heightOfContents and/or #widthOfContents.
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The values returned by these are used to compute the fractio which is
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visible (i.e. the scrollers thumb heights).
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There are two ways to create a ScrollableView:
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if the type of the view to be scrolled is known in advance,
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use:
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v := ScrollableView for:<ViewClass> in:someSuperView.
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otherwise, create the scrollableView empty with:
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v := ScrollableView in:someSuperView.
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and define the view later with:
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v scrolledView:aViewToBeScrolled
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It is also possible to change the scrolledView multiple times,
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for example if different views are needed to display different types
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of data (see example2).
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If you want to scroll views (instead of contents), you need a companion
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class (ViewScroller). See the documentation there.
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If you need horizontal scrolling too, use an instance of HVScrollableView.
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"
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!
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examples
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"
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example1 (simple scrolled text):
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|top scr txt|
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top := StandardSystemView label:'scroll example1'.
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top extent:200@100.
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scr := ScrollableView for:EditTextView in:top.
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scr origin:0.0@0.0 corner:1.0@1.0.
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txt := scr scrolledView.
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txt list:#('line1'
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'line2'
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'line3'
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'line4'
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'line5'
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'line7'
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'line8'
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'line9'
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'line10'
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).
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top open
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example2 (changing the scrolledView later):
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|top scr txtView1 txtView2|
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top := StandardSystemView label:'scroll example2'.
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top extent:200@100.
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scr := ScrollableView in:top.
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scr origin:0.0@0.0 corner:1.0@1.0.
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top open.
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(Delay forSeconds:5) wait.
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txtView1 := EditTextView new.
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txtView1 list:#(
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'wait 5 seconds to see the other text'
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'line2'
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'line3'
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'line4'
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'line5'
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'line7'
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'line8'
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'line9'
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'line10'
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).
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scr scrolledView:txtView1.
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(Delay forSeconds:5) wait.
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txtView2 := EditTextView new.
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txtView2 list:#('this is the other text'
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'alternative line2'
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'alternative line3'
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'alternative line4'
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'alternative line5'
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'alternative line6').
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scr scrolledView:txtView2.
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"
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! !
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0
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!ScrollableView class methodsFor:'instance creation'!
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miniScroller:mini
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"return a new scrolling view. The subview will be created later.
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The view will have full scrollbars if mini is false,
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miniscrollers if true."
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^ self for:nil miniScrollerH:mini miniScrollerV:mini
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!
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miniScrollerH:miniH miniScrollerV:miniV
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"return a new scrolling view. The subview will be created later.
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The view will have full scrollbars if the corresponding miniH/miniV
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is false, miniscrollers if false."
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^ self for:nil miniScrollerH:miniH miniScrollerV:miniV in:nil
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!
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in:aView
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"return a new scrolling view to be contained in aView.
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There is no slave view now - this has to be set later via
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the scrolledView: method.
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The view will have full scrollbars."
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^ self for:nil miniScrollerH:false miniScrollerV:false in:aView
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!
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for:aViewClass
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"return a new scrolling view scrolling an instance of aViewClass.
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The subview is created here.
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The view will have full scrollbars."
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^ self for:aViewClass miniScrollerH:false miniScrollerV:false in:nil
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0
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!
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for:aViewClass in:aView
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"return a new scrolling view scrolling an instance of aViewClass.
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The subview is created here.
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The view will have full scrollbars."
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188 |
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^ self for:aViewClass miniScrollerH:false miniScrollerV:false in:aView
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!
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for:aViewClass miniScrollerH:miniH miniScrollerV:miniV
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"return a new scrolling view scrolling an instance of aViewClass.
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The subview is created here.
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The view will have full scrollbars if the corresponding miniH/miniV
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is false, miniscrollers if false."
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197 |
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^ self for:aViewClass miniScrollerH:miniH miniScrollerV:miniV in:nil
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!
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200 |
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38
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201 |
for:aViewClass miniScroller:mini in:aView
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202 |
"return a new scrolling view scrolling an instance of aViewClass.
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The subview is created here.
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The view will have full scrollbars if mini is false, miniscrollers
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if true."
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206 |
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^ self for:aViewClass miniScrollerH:mini miniScrollerV:mini in:aView
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!
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209 |
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210 |
for:aViewClass miniScrollerH:miniH miniScrollerV:miniV in:aView
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211 |
"return a new scrolling view scrolling an instance of aViewClass.
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212 |
The subview is created here.
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213 |
The view will have full scrollbars if the corresponding miniH/miniV
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214 |
is false, miniscrollers if false."
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215 |
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0
|
216 |
|newView|
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217 |
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|
218 |
aView notNil ifTrue:[
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|
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newView := self basicNew.
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|
220 |
newView device:(aView device).
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|
221 |
aView addSubView:newView
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0
|
222 |
] ifFalse:[
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|
223 |
"create on Display by default"
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|
224 |
newView := self new.
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0
|
225 |
].
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|
226 |
newView initializeFor:aViewClass miniScrollerH:miniH miniScrollerV:miniV.
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|
227 |
^ newView
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228 |
! !
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229 |
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230 |
!ScrollableView methodsFor:'initialization'!
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231 |
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232 |
initialize
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38
|
233 |
"default setup: full scrollers"
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234 |
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235 |
^ self initializeFor:nil miniScrollerH:false miniScrollerV:false
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0
|
236 |
!
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237 |
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|
238 |
initializeFor:aViewClass miniScrollerH:miniH miniScrollerV:miniV
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|
239 |
|negativeOffset twoMargins halfMargin cls isST80 is3D|
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|
240 |
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super initialize.
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242 |
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|
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lockUpdates := false.
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|
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isST80 := StyleSheet name = #st80.
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246 |
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38
|
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style == #openwin ifTrue:[self level:0].
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59
|
248 |
is3D := StyleSheet is3D.
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|
249 |
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|
250 |
isST80 ifTrue:[
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|
251 |
innerMargin := 0
|
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38
|
252 |
] ifFalse:[
|
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59
|
253 |
is3D ifTrue:[
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|
254 |
innerMargin := ViewSpacing.
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|
255 |
] ifFalse:[
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|
256 |
innerMargin := 0
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|
257 |
]
|
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38
|
258 |
].
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0
|
259 |
negativeOffset := borderWidth negated.
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260 |
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|
261 |
"create the scrollbar"
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|
262 |
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59
|
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isST80 ifTrue:[
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|
264 |
cls := ScrollBar
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|
265 |
] ifFalse:[
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|
266 |
cls := miniV ifTrue:[MiniScroller] ifFalse:[ScrollBar].
|
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|
267 |
].
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38
|
268 |
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|
269 |
scrollBar := cls in:self.
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0
|
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scrollBar thumbOrigin:0 thumbHeight:100.
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271 |
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|
272 |
"create the subview"
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59
|
273 |
is3D ifTrue:[
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|
274 |
twoMargins := innerMargin * 2.
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|
275 |
halfMargin := innerMargin // 2.
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0
|
276 |
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59
|
277 |
aViewClass notNil ifTrue:[
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|
278 |
scrolledView := aViewClass in:self.
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|
279 |
style == #openwin ifTrue:[
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|
280 |
scrolledView level:0.
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|
281 |
scrolledView borderWidth:1
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|
282 |
] ifFalse:[
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|
283 |
isST80 ifTrue:[
|
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|
284 |
scrolledView level:1.
|
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|
285 |
] ifFalse:[
|
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|
286 |
scrolledView level:-1
|
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|
287 |
]
|
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|
288 |
].
|
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|
289 |
].
|
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|
290 |
(scrollBarPosition == #right) ifTrue:[
|
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|
291 |
scrollBar origin:[width - scrollBar extent x
|
|
|
292 |
- (scrollBar borderWidth * 2)
|
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|
293 |
- halfMargin
|
|
|
294 |
@
|
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|
295 |
halfMargin]
|
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|
296 |
extent:[scrollBar extent x @ (height - innerMargin)].
|
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38
|
297 |
|
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59
|
298 |
scrolledView notNil ifTrue:[
|
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|
299 |
scrolledView origin:halfMargin asPoint
|
|
|
300 |
extent:[(width -
|
|
|
301 |
scrollBar width -
|
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|
302 |
twoMargins)
|
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|
303 |
@
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|
304 |
(height - innerMargin)].
|
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|
305 |
]
|
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|
306 |
] ifFalse:[
|
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|
307 |
scrollBar origin:halfMargin asPoint
|
|
|
308 |
extent:[scrollBar extent x @ (height - innerMargin)].
|
|
38
|
309 |
|
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59
|
310 |
scrolledView notNil ifTrue:[
|
|
|
311 |
scrolledView origin:((scrollBar origin x + scrollBar width + innerMargin)
|
|
|
312 |
@
|
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|
313 |
halfMargin)
|
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|
314 |
extent:[(width - scrollBar width - twoMargins)
|
|
|
315 |
@
|
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|
316 |
(height - innerMargin)].
|
|
|
317 |
]
|
|
|
318 |
].
|
|
0
|
319 |
] ifFalse:[
|
|
59
|
320 |
(scrollBarPosition == #right) ifTrue:[
|
|
|
321 |
scrollBar origin:[width - scrollBar extent x
|
|
|
322 |
- scrollBar borderWidth
|
|
|
323 |
@
|
|
|
324 |
negativeOffset]
|
|
|
325 |
] ifFalse:[
|
|
|
326 |
scrollBar origin:negativeOffset asPoint
|
|
|
327 |
].
|
|
|
328 |
scrollBar extent:[scrollBar extent x @ (height "+ (scrollBar borderWidth * 1)")].
|
|
0
|
329 |
|
|
59
|
330 |
aViewClass notNil ifTrue:[
|
|
|
331 |
scrolledView := aViewClass in:self.
|
|
|
332 |
(scrollBarPosition == #right) ifTrue:[
|
|
|
333 |
scrolledView origin:scrolledView borderWidth negated asPoint
|
|
|
334 |
] ifFalse:[
|
|
|
335 |
scrolledView origin:((scrollBar width +
|
|
|
336 |
scrollBar borderWidth -
|
|
|
337 |
scrolledView borderWidth)
|
|
|
338 |
@
|
|
|
339 |
scrolledView borderWidth negated)
|
|
|
340 |
].
|
|
|
341 |
scrolledView extent:[(width - scrollBar width - scrolledView borderWidth)
|
|
|
342 |
@
|
|
|
343 |
(height + (scrollBar borderWidth))
|
|
|
344 |
]
|
|
|
345 |
].
|
|
0
|
346 |
].
|
|
|
347 |
scrolledView notNil ifTrue:[
|
|
59
|
348 |
self setScrollActions.
|
|
|
349 |
"
|
|
|
350 |
pass input to myself (and other subviews) to
|
|
|
351 |
the scrolled view
|
|
|
352 |
"
|
|
|
353 |
self keyboardHandler:scrolledView.
|
|
0
|
354 |
]
|
|
|
355 |
!
|
|
|
356 |
|
|
7
|
357 |
initStyle
|
|
|
358 |
super initStyle.
|
|
|
359 |
|
|
59
|
360 |
scrollBarPosition := StyleSheet at:'scrollBarPosition' default:#left
|
|
7
|
361 |
!
|
|
|
362 |
|
|
0
|
363 |
realize
|
|
|
364 |
super realize.
|
|
38
|
365 |
|
|
0
|
366 |
"since scrolledview may have done something to its contents
|
|
|
367 |
during init-time we had no chance yet to catch contents-
|
|
|
368 |
changes; do it now
|
|
|
369 |
"
|
|
38
|
370 |
scrolledView notNil ifTrue:[
|
|
59
|
371 |
scrollBar setThumbFor:scrolledView
|
|
38
|
372 |
]
|
|
0
|
373 |
! !
|
|
|
374 |
|
|
105
|
375 |
!ScrollableView methodsFor:'queries'!
|
|
|
376 |
|
|
|
377 |
preferedExtent
|
|
|
378 |
scrolledView notNil ifTrue:[
|
|
|
379 |
| pref |
|
|
|
380 |
pref := scrolledView preferedExtent.
|
|
|
381 |
^ (pref x + scrollBar width + (innerMargin * 2)) @ pref y.
|
|
|
382 |
].
|
|
|
383 |
^ super preferedExtent.
|
|
|
384 |
! !
|
|
|
385 |
|
|
7
|
386 |
!ScrollableView methodsFor:'private'!
|
|
|
387 |
|
|
|
388 |
setScrollActions
|
|
|
389 |
"lock prevents repositioning the scroller to the
|
|
|
390 |
actual (often rounded) position while scrolling,
|
|
|
391 |
and keeps it instead at the pointer position.
|
|
|
392 |
|
|
|
393 |
(this avoids run-away scroller when scrolling
|
|
|
394 |
textviews, when the text is aligned line-wise).
|
|
38
|
395 |
Consider this as a kludge."
|
|
7
|
396 |
|
|
65
|
397 |
lockUpdates := false.
|
|
7
|
398 |
|
|
|
399 |
scrollBar scrollAction:[:position |
|
|
65
|
400 |
lockUpdates := true.
|
|
59
|
401 |
scrolledView scrollVerticalToPercent:position.
|
|
65
|
402 |
lockUpdates := false
|
|
7
|
403 |
].
|
|
|
404 |
scrollBar scrollUpAction:[scrolledView scrollUp].
|
|
|
405 |
scrollBar scrollDownAction:[scrolledView scrollDown].
|
|
|
406 |
|
|
65
|
407 |
scrolledView addDependent:self.
|
|
7
|
408 |
! !
|
|
|
409 |
|
|
0
|
410 |
!ScrollableView methodsFor:'accessing'!
|
|
|
411 |
|
|
|
412 |
scrollBar
|
|
|
413 |
"return the scrollbar"
|
|
|
414 |
|
|
|
415 |
^ scrollBar
|
|
|
416 |
!
|
|
|
417 |
|
|
|
418 |
scrolledView
|
|
|
419 |
"return the scrolled view"
|
|
|
420 |
|
|
|
421 |
^ scrolledView
|
|
|
422 |
!
|
|
|
423 |
|
|
|
424 |
scrolledView:aView
|
|
38
|
425 |
"set the view to scroll"
|
|
|
426 |
|
|
|
427 |
|halfMargin twoMargins|
|
|
0
|
428 |
|
|
|
429 |
scrolledView notNil ifTrue:[
|
|
59
|
430 |
scrolledView destroy.
|
|
|
431 |
scrolledView := nil.
|
|
0
|
432 |
].
|
|
|
433 |
scrolledView := aView.
|
|
|
434 |
|
|
38
|
435 |
((style ~~ #normal) and:[style ~~ #mswindows]) ifTrue:[
|
|
59
|
436 |
"3D look"
|
|
38
|
437 |
|
|
59
|
438 |
twoMargins := innerMargin * 2.
|
|
|
439 |
halfMargin := innerMargin // 2.
|
|
0
|
440 |
|
|
59
|
441 |
style == #openwin ifTrue:[
|
|
|
442 |
scrolledView level:0.
|
|
|
443 |
scrolledView borderWidth:1
|
|
|
444 |
] ifFalse:[
|
|
|
445 |
scrolledView level:-1
|
|
|
446 |
].
|
|
38
|
447 |
|
|
59
|
448 |
(scrollBarPosition == #right) ifTrue:[
|
|
|
449 |
scrolledView
|
|
|
450 |
origin:halfMargin asPoint
|
|
|
451 |
extent:[(width -
|
|
|
452 |
scrollBar width -
|
|
|
453 |
twoMargins)
|
|
|
454 |
@
|
|
|
455 |
(height - innerMargin)
|
|
|
456 |
].
|
|
|
457 |
] ifFalse:[
|
|
|
458 |
scrolledView
|
|
|
459 |
origin:((scrollBar origin x
|
|
|
460 |
+ scrollBar width
|
|
|
461 |
+ innerMargin)
|
|
|
462 |
@
|
|
|
463 |
halfMargin)
|
|
|
464 |
extent:[(width
|
|
|
465 |
- scrollBar width
|
|
|
466 |
- twoMargins)
|
|
|
467 |
@
|
|
|
468 |
(height - innerMargin)
|
|
|
469 |
].
|
|
|
470 |
]
|
|
38
|
471 |
] ifFalse:[
|
|
59
|
472 |
"non 3D look"
|
|
|
473 |
(scrollBarPosition == #right) ifTrue:[
|
|
|
474 |
scrolledView
|
|
|
475 |
origin:scrolledView borderWidth negated asPoint
|
|
|
476 |
] ifFalse:[
|
|
|
477 |
scrolledView
|
|
|
478 |
origin:((scrollBar width
|
|
|
479 |
+ scrollBar borderWidth
|
|
|
480 |
- scrolledView borderWidth)
|
|
|
481 |
@
|
|
|
482 |
scrolledView borderWidth negated)
|
|
|
483 |
].
|
|
|
484 |
scrolledView
|
|
|
485 |
extent:[
|
|
|
486 |
(width
|
|
|
487 |
- scrollBar width
|
|
|
488 |
- scrolledView borderWidth)
|
|
|
489 |
@
|
|
|
490 |
(height
|
|
|
491 |
+ (scrollBar borderWidth))
|
|
|
492 |
]
|
|
0
|
493 |
].
|
|
|
494 |
|
|
38
|
495 |
super addSubView:scrolledView.
|
|
|
496 |
self setScrollActions.
|
|
|
497 |
"
|
|
|
498 |
pass input to myself (and other subviews) to
|
|
|
499 |
the scrolled view
|
|
|
500 |
"
|
|
|
501 |
self keyboardHandler:scrolledView.
|
|
|
502 |
|
|
|
503 |
realized ifTrue:[
|
|
59
|
504 |
self sizeChanged:nil.
|
|
|
505 |
scrolledView realize
|
|
38
|
506 |
].
|
|
0
|
507 |
! !
|
|
|
508 |
|
|
|
509 |
!ScrollableView methodsFor:'slave-view messages'!
|
|
|
510 |
|
|
|
511 |
leftButtonMenu
|
|
38
|
512 |
"return scrolledViews leftbuttonmenu"
|
|
|
513 |
|
|
|
514 |
scrolledView isNil ifTrue:[^ nil].
|
|
0
|
515 |
^ scrolledView leftButtonMenu
|
|
|
516 |
!
|
|
|
517 |
|
|
|
518 |
leftButtonMenu:aMenu
|
|
|
519 |
"pass on leftbuttonmenu to scrolledView"
|
|
|
520 |
|
|
|
521 |
scrolledView leftButtonMenu:aMenu
|
|
|
522 |
!
|
|
|
523 |
|
|
|
524 |
middleButtonMenu
|
|
38
|
525 |
"return scrolledViews middlebuttonmenu"
|
|
|
526 |
|
|
|
527 |
scrolledView isNil ifTrue:[^ nil].
|
|
0
|
528 |
^ scrolledView middleButtonMenu
|
|
|
529 |
!
|
|
|
530 |
|
|
|
531 |
middleButtonMenu:aMenu
|
|
|
532 |
"pass on middlebuttonmenu to scrolledView"
|
|
|
533 |
|
|
|
534 |
scrolledView middleButtonMenu:aMenu
|
|
|
535 |
!
|
|
|
536 |
|
|
|
537 |
rightButtonMenu
|
|
38
|
538 |
"return scrolledViews rightbuttonmenu"
|
|
|
539 |
|
|
|
540 |
scrolledView isNil ifTrue:[^ nil].
|
|
0
|
541 |
^ scrolledView rightButtonMenu
|
|
|
542 |
!
|
|
|
543 |
|
|
|
544 |
rightButtonMenu:aMenu
|
|
|
545 |
"pass on rightbuttonmenu to scrolledView"
|
|
|
546 |
|
|
|
547 |
scrolledView rightButtonMenu:aMenu
|
|
|
548 |
!
|
|
|
549 |
|
|
|
550 |
doesNotUnderstand:aMessage
|
|
|
551 |
"this is funny: all message we do not understand, are passed
|
|
|
552 |
on to the scrolledView - so we do not have to care for all
|
|
|
553 |
possible messages ...(thanks to the Message class)"
|
|
|
554 |
|
|
|
555 |
scrolledView isNil ifFalse:[
|
|
59
|
556 |
^ scrolledView perform:(aMessage selector)
|
|
|
557 |
withArguments:(aMessage arguments)
|
|
0
|
558 |
]
|
|
|
559 |
! !
|
|
|
560 |
|
|
38
|
561 |
!ScrollableView methodsFor:'forced scroll'!
|
|
|
562 |
|
|
|
563 |
pageUp
|
|
|
564 |
"page up"
|
|
|
565 |
|
|
|
566 |
scrollBar pageUp
|
|
|
567 |
!
|
|
|
568 |
|
|
|
569 |
pageDown
|
|
|
570 |
"page down"
|
|
|
571 |
|
|
|
572 |
scrollBar pageDown
|
|
|
573 |
! !
|
|
|
574 |
|
|
65
|
575 |
!ScrollableView methodsFor:'changes '!
|
|
|
576 |
|
|
|
577 |
update:something with:argument from:changedObject
|
|
|
578 |
"whenever the scrolledView changes its contents, the scroller must
|
|
|
579 |
be updated"
|
|
|
580 |
|
|
|
581 |
changedObject == scrolledView ifTrue:[
|
|
|
582 |
something == #sizeOfContents ifTrue:[
|
|
|
583 |
scrollBar setThumbFor:scrolledView.
|
|
|
584 |
^ self
|
|
|
585 |
].
|
|
|
586 |
something == #originOfContents ifTrue:[
|
|
|
587 |
lockUpdates ifFalse:[
|
|
|
588 |
scrollBar setThumbOriginFor:scrolledView.
|
|
|
589 |
].
|
|
|
590 |
^ self
|
|
|
591 |
].
|
|
|
592 |
].
|
|
|
593 |
! !
|
|
|
594 |
|
|
0
|
595 |
!ScrollableView methodsFor:'event processing'!
|
|
|
596 |
|
|
38
|
597 |
keyPress:key x:x y:y
|
|
|
598 |
"a key was pressed - handle page-keys here"
|
|
|
599 |
|
|
|
600 |
(key == #Prior) ifTrue: [^ self pageUp].
|
|
|
601 |
(key == #Next) ifTrue: [^ self pageDown].
|
|
|
602 |
|
|
|
603 |
super keyPress:key x:x y:y
|
|
|
604 |
!
|
|
|
605 |
|
|
0
|
606 |
sizeChanged:how
|
|
|
607 |
super sizeChanged:how.
|
|
38
|
608 |
scrolledView notNil ifTrue:[
|
|
59
|
609 |
scrollBar setThumbFor:scrolledView
|
|
38
|
610 |
]
|
|
0
|
611 |
! !
|