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"
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COPYRIGHT (c) 1992 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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Object subclass:#EnterFieldGroup
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instanceVariableNames:'fields currentField leaveAction'
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classVariableNames:''
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poolDictionaries:''
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category:'Views-Support'
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!
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EnterFieldGroup comment:'
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COPYRIGHT (c) 1992 by Claus Gittinger
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69
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All Rights Reserved
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$Header: /cvs/stx/stx/libwidg/EnterFieldGroup.st,v 1.8 1995-05-06 14:16:40 claus Exp $
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'!
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!EnterFieldGroup class methodsFor:'documentation'!
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copyright
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"
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COPYRIGHT (c) 1992 by Claus Gittinger
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69
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All Rights Reserved
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0
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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/EnterFieldGroup.st,v 1.8 1995-05-06 14:16:40 claus Exp $
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"
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!
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documentation
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"
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EnterFieldGroup controlls the interaction between EnterFields
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enabling next/prev field when a field is left.
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Instances of this class keep track of which field of the group is the
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currentField (i.e. the one getting keyboard input) and forwards input
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to the active field (having the inputField delegate its input to me).
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The block accessable as leaveAction is evaluated when the last
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field of the group is left (by cursor-down or cr).
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Usually this block triggers accept on the fields and/or performs some
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followup processing and closes the topview (for example: in a dialog).
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"
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!
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examples
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"
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without a group - user has to click on next field to activate it:
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|top panel field1 field2 field3|
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top := StandardSystemView new.
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top extent:200@200.
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panel := VerticalPanelView origin:0.0@0.0 corner:1.0@1.0 in:top.
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panel add:(field1 := EditField extent:(1.0 @ nil)).
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panel add:(field2 := EditField extent:(1.0 @ nil)).
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panel add:(field3 := EditField extent:(1.0 @ nil)).
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top open
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with a group - Return-key or CursorKey enables next field:
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|top panel group field1 field2 field3|
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top := StandardSystemView new.
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top extent:200@200.
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panel := VerticalPanelView origin:0.0@0.0 corner:1.0@1.0 in:top.
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panel add:(field1 := EditField extent:(1.0 @ nil)).
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panel add:(field2 := EditField extent:(1.0 @ nil)).
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panel add:(field3 := EditField extent:(1.0 @ nil)).
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group := EnterFieldGroup new.
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group add:field1; add:field2; add:field3.
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top open
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with a group - close the box when the last field is left:
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|top panel group field1 field2 field3|
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top := StandardSystemView new.
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top extent:200@200.
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panel := VerticalPanelView origin:0.0@0.0 corner:1.0@1.0 in:top.
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panel add:(field1 := EditField extent:(1.0 @ nil)).
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panel add:(field2 := EditField extent:(1.0 @ nil)).
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panel add:(field3 := EditField extent:(1.0 @ nil)).
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group := EnterFieldGroup new.
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group add:field1; add:field2; add:field3.
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group leaveAction:[top destroy].
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top open
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"
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! !
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!EnterFieldGroup methodsFor:'adding / removing'!
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add:aField
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|thisIndex next|
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fields isNil ifTrue:[
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fields := OrderedCollection new
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].
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fields add:aField.
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thisIndex := fields size.
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aField delegate:self.
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aField hideCursor.
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aField disable.
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"set the fields enableAction to disable active field"
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aField enableAction:[
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"/ Transcript showCr:'enable field with: ' , aField editValue.
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currentField notNil ifTrue:[
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currentField disable
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].
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currentField := aField
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].
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"set the fields leaveAction to enable next field"
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aField leaveAction:[:key |
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"/ Transcript showCr:'left field with: ' , aField editValue.
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currentField notNil ifTrue:[
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currentField disable.
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currentField hideCursor.
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].
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((key == #CursorUp) or:[key == #PreviousField]) ifTrue:[
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(thisIndex == 1) ifTrue:[
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next := fields size
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] ifFalse:[
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next := thisIndex - 1
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]
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].
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((key == #CursorDown) or:[key == #NextField]) ifTrue:[
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(thisIndex == (fields size)) ifTrue:[
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next := 1
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] ifFalse:[
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next := thisIndex + 1
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]
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].
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(key == #Return) ifTrue:[
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(thisIndex == (fields size)) ifTrue:[
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leaveAction notNil ifTrue:[
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leaveAction value.
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currentField := nil
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] ifFalse:[
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next := 1
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]
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] ifFalse:[
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next := thisIndex + 1
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]
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].
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next notNil ifTrue:[
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self makeActive:(fields at:next)
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"/ (fields at:next) enable.
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"/ currentField := fields at:next
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]
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].
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fields size == 1 ifTrue:[
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"the first one"
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self makeActive:aField
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]
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! !
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!EnterFieldGroup methodsFor:'accessing'!
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leaveAction:aBlock
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"set the action to perform when the last field is left.
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Usually, this is to accept the values of all fields and perform
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some additional processing (such as closing a dialog)."
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leaveAction := aBlock
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! !
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!EnterFieldGroup methodsFor:'misc'!
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activateFirst
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"pass controll to my first field"
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fields notNil ifTrue:[
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self makeActive:(fields first)
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]
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! !
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!EnterFieldGroup methodsFor:'private'!
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makeActive:aField
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"make a specific field the active one"
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currentField notNil ifTrue:[
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currentField disable.
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currentField hideCursor.
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currentField hasKeyboardFocus:false.
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].
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currentField := aField.
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currentField enable.
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currentField showCursor.
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currentField hasKeyboardFocus:true.
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! !
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!EnterFieldGroup methodsFor:'event forwarding'!
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handlesKeyPress:key inView:aView
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"query from event processor: am I interrested in key-events ?
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yes I am (to forward it to the active field)."
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^ true
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!
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handlesButtonPress:button inView:aView
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"query from event processor: am I interrested in button-events ?
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yes I am (to activate the clicked-on field)."
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^ true
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!
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handlesButtonShiftPress:button inView:aView
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"query from event processor: am I interrested in button-events ?
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yes I am (to activate the clicked-on field)."
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^ true
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!
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keyPress:key x:x y:y view:aView
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"key-press in any field - forward the key to the active field"
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currentField notNil ifTrue:[
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currentField keyPress:key x:0 y:0
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]
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!
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keyPress:key x:x y:y
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"key-press in an enclosing view (via delegation)
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forward the key to the active field"
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currentField notNil ifTrue:[
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currentField keyPress:key x:-1 y:-1
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]
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!
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buttonPress:button x:x y:y view:aView
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"clicking on a field activates it and forwards the click to it"
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self makeActive:aView.
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aView buttonPress:button x:x y:y
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!
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buttonShiftPress:button x:x y:y view:aView
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"clicking on a field activates it and forwards the click to it"
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self makeActive:aView.
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aView buttonShiftPress:button x:x y:y
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! !
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