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"
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5
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COPYRIGHT (c) 1990 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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EditTextView subclass:#EditField
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instanceVariableNames:'leaveAction enabled enableAction'
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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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EditField comment:'
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5
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COPYRIGHT (c) 1990 by Claus Gittinger
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All Rights Reserved
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38
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$Header: /cvs/stx/stx/libwidg/EditField.st,v 1.6 1994-08-07 13:21:28 claus Exp $
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'!
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!EditField class methodsFor:'documentation'!
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38
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copyright
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"
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COPYRIGHT (c) 1990 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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version
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"
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$Header: /cvs/stx/stx/libwidg/EditField.st,v 1.6 1994-08-07 13:21:28 claus Exp $
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"
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!
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documentation
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"
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38
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an editable text-field. Realized by using an EditTextView,
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and forcing its size to 1 line - disabling cursor movement
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in the vertical direction.
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An action (leaveAction) is performed when the field is left
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by either Return or a cursor movement, or if 'accept' is
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performed from the menu.
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"
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! !
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!EditField class methodsFor:'defaults'!
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defaultNumberOfLines
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"the number of lines in the field"
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^ 1
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! !
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!EditField methodsFor:'initialization'!
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initialize
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super initialize.
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self height:(font height + font descent + (topMargin * 2)).
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enabled := true.
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fixedSize := true.
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nFullLinesShown := 1.
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nLinesShown := 1.
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!
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initStyle
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|myBgColor myFont|
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super initStyle.
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3
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myBgColor := resources name:'BACKGROUND' default:nil.
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myBgColor notNil ifTrue:[
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bgColor := myBgColor on:device.
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self viewBackground:bgColor.
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selectionFgColor := fgColor on:device.
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selectionBgColor := White on:device
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].
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3
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myFont := resources name:'FONT' default:nil.
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myFont notNil ifTrue:[
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font := myFont
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]
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!
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initializeMiddleButtonMenu
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|labels|
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labels := resources array:#(
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'copy'
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'cut'
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'paste'
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"
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'replace'
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"
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'-'
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'accept'
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).
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0
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self middleButtonMenu:(PopUpMenu
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labels:labels
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selectors:#(
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copySelection
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cut
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paste
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"
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replace
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"
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nil
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accept
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)
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receiver:self
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for:self)
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! !
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!EditField methodsFor:'realization'!
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realize
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"scroll back to beginning when realized"
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leftOffset := 0.
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super realize
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! !
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!EditField methodsFor:'private'!
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startScrollUp:y
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"no scrolling in editfields"
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^ self
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!
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startScrollDown:y
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"no scrolling in editfields"
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^ self
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! !
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38
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!EditField methodsFor:'queries'!
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preferredExtent
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"return the preferred extent of this view.
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That is the width of the string plus some extra,
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but not wider than half of the screen"
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|string w|
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string := self contents.
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(string isNil or:[string isBlank]) ifTrue:[
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^ super preferredExtent
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].
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w := (((font on:device) widthOf:string) * 1.5) rounded.
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w := w min:(device width // 2).
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^ w @ self height
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! !
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!EditField methodsFor:'editing'!
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paste:someText
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"redefined to force text to 1 line"
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super paste:someText.
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list size > 1 ifTrue:[
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self deleteFromLine:2 toLine:(list size)
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]
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! !
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!EditField methodsFor:'accessing'!
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list:someText
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"redefined to force text to 1 line, and notify dependents
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of any changed extent-wishes."
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|l oldWidth|
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l := someText.
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l size > 1 ifTrue:[
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l := OrderedCollection with:(l at:1)
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].
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oldWidth := self widthOfContents.
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super list:l.
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self widthOfContents ~~ oldWidth ifTrue:[
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self changed:self with:#preferredExtent
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]
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!
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198 |
contents
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"return contents as a string
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- redefined since EditFields hold only one line of text"
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201 |
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list isNil ifTrue:[^ ''].
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(list size == 0) ifTrue:[^ ''].
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^ list at:1
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!
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enable
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"enable the field; show cursor and allow input"
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enabled ifFalse:[
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enableAction notNil ifTrue:[
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enableAction value
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].
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enabled := true.
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super showCursor
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]
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!
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disable
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"disable the field; hide cursor and ignore input"
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enabled ifTrue:[
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enabled := false.
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self hideCursor
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]
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!
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enableAction:aBlock
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"define an action to be evaluated when enabled by clicking upon"
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enableAction := aBlock
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!
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leaveAction:aBlock
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"define an action to be evaluated when field is left by return key"
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leaveAction := aBlock
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!
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initialText:aString
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"set the initialText"
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leftOffset := 0.
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self contents:aString.
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7
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aString size ~~ 0 ifTrue:[
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self selectFromLine:1 col:1 toLine:1 col:(aString size)
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]
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0
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248 |
! !
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249 |
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!EditField methodsFor:'cursor drawing'!
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showCursor
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"make cursor visible if currently invisible - but only if this
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EditField is enabled"
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enabled ifTrue:[super showCursor]
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! !
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258 |
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!EditField methodsFor:'cursor movement'!
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cursorLine:line col:col
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"catch cursor movement"
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super cursorLine:1 col:col
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0
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!
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cursorDown
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"catch cursor movement"
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(cursorVisibleLine == nLinesShown) ifFalse:[
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super cursorDown
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]
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! !
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!EditField methodsFor:'events'!
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accept
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"accept the fields contents - perform the leave action as if
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return was pressed."
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280 |
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enabled ifTrue:[
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leaveAction notNil ifTrue:[
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leaveAction value:#Return
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].
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].
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!
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0
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buttonPress:button x:x y:y
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"enable myself on mouse click"
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enabled ifFalse:[
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enabled := true.
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super buttonPress:button x:x y:y.
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enableAction notNil ifTrue:[
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enableAction value
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296 |
]
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] ifTrue:[
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super buttonPress:button x:x y:y
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299 |
]
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!
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canHandle:aKey
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"return true, if the receiver would like to handle aKey
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(usually from another view, when the receiver is part of
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a more complex dialog box).
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We do return true here, since the editfield will handle
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all keys."
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^ true
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310 |
!
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311 |
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keyPress:key x:x y:y
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"if keyHandler is defined, pass input; otherwise check for leave
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keys"
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38
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|leave xCol newOffset oldWidth newWidth|
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0
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317 |
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enabled ifFalse:[
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319 |
(keyboardHandler notNil
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320 |
and:[keyboardHandler canHandle:key]) ifTrue:[
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(keyboardHandler == self) ifTrue:[
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self error:'invalid keyhandler'.
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^ self
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].
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keyboardHandler keyPress:key x:x y:y
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326 |
].
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327 |
^ self
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328 |
].
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329 |
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330 |
(key == #DeleteLine) ifTrue:[
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331 |
Smalltalk at:#CopyBuffer put:(self contents).
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332 |
self contents:''. ^ self
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333 |
].
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334 |
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335 |
leave := false.
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336 |
(key == #Return) ifTrue:[leave := true].
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337 |
((key == #CursorDown) or:[key == #Next]) ifTrue:[leave := true].
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338 |
((key == #CursorUp) or:[key == #Prior]) ifTrue:[leave := true].
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339 |
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340 |
leave ifTrue:[
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|
341 |
leaveAction notNil ifTrue:[
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342 |
leaveAction value:key
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343 |
].
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|
344 |
^ self
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345 |
].
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38
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346 |
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|
347 |
oldWidth := self widthOfContents.
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0
|
348 |
super keyPress:key x:x y:y.
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38
|
349 |
newWidth := self widthOfContents.
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350 |
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351 |
"
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352 |
should (& can) we resize ?
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353 |
"
|
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3
|
354 |
xCol := (self xOfCol:cursorCol inLine:cursorLine) - leftOffset.
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|
355 |
(xCol > (width * (5/6))) ifTrue:[
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38
|
356 |
self changed:self with:#preferredExtent
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|
357 |
] ifFalse:[
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|
358 |
self widthOfContents < (width * (1/6)) ifTrue:[
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|
359 |
self changed:self with:#preferredExtent
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|
360 |
]
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|
361 |
].
|
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362 |
|
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|
363 |
"
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|
364 |
did someone react ?
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|
365 |
(if not, we scroll horizontally)
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|
366 |
"
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|
367 |
xCol := (self xOfCol:cursorCol inLine:cursorLine) - leftOffset.
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|
368 |
(xCol > (width * (5/6))) ifTrue:[
|
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|
369 |
newOffset := leftOffset + (width // 2).
|
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|
370 |
] ifFalse:[
|
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|
371 |
(xCol < (width * (1/6))) ifTrue:[
|
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|
372 |
newOffset := 0 max: leftOffset - (width // 2).
|
|
|
373 |
] ifFalse:[
|
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|
374 |
newOffset := leftOffset
|
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|
375 |
]
|
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|
376 |
].
|
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|
377 |
newOffset ~~ leftOffset ifTrue:[
|
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|
378 |
leftOffset := newOffset.
|
|
0
|
379 |
self clear.
|
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|
380 |
self redraw
|
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|
381 |
]
|
|
|
382 |
! !
|