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"
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5
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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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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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7
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Object subclass:#EnterFieldGroup
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instanceVariableNames:'fields currentField leaveAction
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wrap'
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69
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classVariableNames:''
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poolDictionaries:''
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category:'Views-Support'
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0
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!
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EnterFieldGroup comment:'
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5
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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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122
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$Header: /cvs/stx/stx/libwidg/EnterFieldGroup.st,v 1.9 1995-05-07 00:15:50 claus Exp $
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38
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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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34 |
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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 1.9 1995-05-07 00:15:50 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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121
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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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122
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EnterFieldGroups can be used as a delegate (of the topView) to forward
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input (entered into the topView) to the currently active field.
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Stepping to previous field is via CursorUp/PreviousField,
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to next field via CursorDown/NextField/Tab.
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Notice, that by default, the editField takes the tab-character as
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a normal character. To step using tab, you have to add the Tab key to the
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fields leaveKeys.
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Instance variables:
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fields <Collection of EditField> the fields of the group
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currentField <EditField> the active field
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leaveAction <nil|Block> action to perform, when the
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last field is left by a non-wrap
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wrap <Boolean> if true, non-return next-keys wrap
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back to the first field.
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If false (the default), next in
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the last field is taken as return.
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This is ignored, if no leaveAction was
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defined.
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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 enter mouse into the next field to activate it;
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Cursor-keys dont work:
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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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(but still, mouse pointer has to be moved into any of the fields,
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because the topView does not forward its input into the fields)
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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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same, enables tabbing via the Tab key:
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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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field1 leaveKeys:(EditField defaultLeaveKeys copyWith:#Tab).
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field2 leaveKeys:(EditField defaultLeaveKeys copyWith:#Tab).
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field3 leaveKeys:(EditField defaultLeaveKeys copyWith:#Tab).
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top open
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with a group - Return-key or CursorKey enables next field:
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input into topView is forwarded to the group:
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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 delegate:group.
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top open
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as above, but 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 delegate:group.
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top open
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same as above, with Tab-key stepping:
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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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field1 leaveKeys:(EditField defaultLeaveKeys copyWith:#Tab).
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field2 leaveKeys:(EditField defaultLeaveKeys copyWith:#Tab).
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field3 leaveKeys:(EditField defaultLeaveKeys copyWith:#Tab).
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top delegate:group.
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top open
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the next example shows that the input order is defined by the
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order in the group; NOT by the physical layout of the fields in the superview:
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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:field3; add:field2; add:field1.
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group leaveAction:[top destroy].
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top delegate:group.
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top open
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using a single model for all fields:
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(here, we use a Plug to simulate a more complex model):
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|top panel group field1 field2 field3 model
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value1 value2 value3|
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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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value1 := 'one'. value2 := 'two'. value3 := 'three'.
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model := Plug new.
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model respondTo:#value1 with:[value1].
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model respondTo:#value1: with:[:arg | value1 := arg].
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model respondTo:#value2 with:[value2].
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model respondTo:#value2: with:[:arg | value2 := arg].
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model respondTo:#value3 with:[value3].
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model respondTo:#value3: with:[:arg | value3 := arg].
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field1 model:model; aspect:#value1; change:#value1:.
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field2 model:model; aspect:#value2; change:#value2:.
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field3 model:model; aspect:#value3; change:#value3:.
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top delegate:group.
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top openModal.
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Transcript showCr:'value1: ' , value1.
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Transcript showCr:'value2: ' , value2.
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Transcript showCr:'value3: ' , value3.
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286 |
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287 |
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the above is done automatically for you, if you add inputFields
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to a dialogBox:
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|box model
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value1 value2 value3|
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293 |
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box := DialogBox new.
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box extent:200@200.
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296 |
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value1 := 'one'. value2 := 'two'. value3 := 'three'.
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model := Plug new.
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model respondTo:#value1 with:[value1].
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model respondTo:#value1: with:[:arg | value1 := arg].
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302 |
model respondTo:#value2 with:[value2].
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model respondTo:#value2: with:[:arg | value2 := arg].
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304 |
model respondTo:#value3 with:[value3].
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model respondTo:#value3: with:[:arg | value3 := arg].
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306 |
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(box addInputFieldOn:model) aspect:#value1; change:#value1:.
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box addVerticalSpace.
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309 |
(box addInputFieldOn:model) aspect:#value2; change:#value2:.
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box addVerticalSpace.
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(box addInputFieldOn:model) aspect:#value3; change:#value3:.
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312 |
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box open.
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314 |
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315 |
Transcript showCr:'value1: ' , value1.
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316 |
Transcript showCr:'value2: ' , value2.
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317 |
Transcript showCr:'value3: ' , value3.
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38
|
318 |
"
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319 |
! !
|
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0
|
320 |
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122
|
321 |
!EnterFieldGroup class methodsFor:'instance creation'!
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322 |
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323 |
new
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324 |
^ self basicNew wrap:false
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325 |
! !
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326 |
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0
|
327 |
!EnterFieldGroup methodsFor:'adding / removing'!
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328 |
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329 |
add:aField
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122
|
330 |
|thisIndex next action|
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0
|
331 |
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|
332 |
fields isNil ifTrue:[
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69
|
333 |
fields := OrderedCollection new
|
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0
|
334 |
].
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|
335 |
fields add:aField.
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|
336 |
thisIndex := fields size.
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121
|
337 |
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7
|
338 |
aField delegate:self.
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121
|
339 |
aField hideCursor.
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0
|
340 |
aField disable.
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341 |
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|
342 |
"set the fields enableAction to disable active field"
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343 |
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344 |
aField enableAction:[
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121
|
345 |
"/ Transcript showCr:'enable field with: ' , aField editValue.
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69
|
346 |
currentField notNil ifTrue:[
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|
347 |
currentField disable
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|
348 |
].
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|
349 |
currentField := aField
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0
|
350 |
].
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|
351 |
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|
352 |
"set the fields leaveAction to enable next field"
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353 |
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|
354 |
aField leaveAction:[:key |
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121
|
355 |
"/ Transcript showCr:'left field with: ' , aField editValue.
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69
|
356 |
currentField notNil ifTrue:[
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121
|
357 |
currentField disable.
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|
358 |
currentField hideCursor.
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|
69
|
359 |
].
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122
|
360 |
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|
361 |
action := key.
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121
|
362 |
((key == #CursorUp) or:[key == #PreviousField]) ifTrue:[
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|
69
|
363 |
(thisIndex == 1) ifTrue:[
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|
364 |
next := fields size
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|
365 |
] ifFalse:[
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|
366 |
next := thisIndex - 1
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|
367 |
]
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|
368 |
].
|
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122
|
369 |
((key == #CursorDown)
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|
370 |
or:[key == #NextField
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|
371 |
or:[key == #Tab]]) ifTrue:[
|
|
69
|
372 |
(thisIndex == (fields size)) ifTrue:[
|
|
122
|
373 |
wrap ifFalse:[
|
|
|
374 |
action := #Return.
|
|
|
375 |
] ifTrue:[
|
|
|
376 |
next := 1
|
|
|
377 |
].
|
|
69
|
378 |
] ifFalse:[
|
|
|
379 |
next := thisIndex + 1
|
|
|
380 |
]
|
|
|
381 |
].
|
|
122
|
382 |
(action == #Return) ifTrue:[
|
|
69
|
383 |
(thisIndex == (fields size)) ifTrue:[
|
|
|
384 |
leaveAction notNil ifTrue:[
|
|
|
385 |
leaveAction value.
|
|
|
386 |
currentField := nil
|
|
|
387 |
] ifFalse:[
|
|
|
388 |
next := 1
|
|
|
389 |
]
|
|
|
390 |
] ifFalse:[
|
|
|
391 |
next := thisIndex + 1
|
|
|
392 |
]
|
|
|
393 |
].
|
|
|
394 |
next notNil ifTrue:[
|
|
121
|
395 |
self makeActive:(fields at:next)
|
|
69
|
396 |
]
|
|
121
|
397 |
].
|
|
|
398 |
|
|
|
399 |
fields size == 1 ifTrue:[
|
|
|
400 |
"the first one"
|
|
|
401 |
self makeActive:aField
|
|
0
|
402 |
]
|
|
|
403 |
! !
|
|
|
404 |
|
|
|
405 |
!EnterFieldGroup methodsFor:'accessing'!
|
|
|
406 |
|
|
122
|
407 |
wrap:aBoolean
|
|
|
408 |
"specifies if leaveing the last field via non-Return
|
|
|
409 |
should wrap back to the first, or leave the group"
|
|
|
410 |
|
|
|
411 |
wrap := aBoolean
|
|
|
412 |
!
|
|
|
413 |
|
|
0
|
414 |
leaveAction:aBlock
|
|
121
|
415 |
"set the action to perform when the last field is left.
|
|
|
416 |
Usually, this is to accept the values of all fields and perform
|
|
|
417 |
some additional processing (such as closing a dialog)."
|
|
|
418 |
|
|
0
|
419 |
leaveAction := aBlock
|
|
|
420 |
! !
|
|
|
421 |
|
|
121
|
422 |
!EnterFieldGroup methodsFor:'misc'!
|
|
|
423 |
|
|
|
424 |
activateFirst
|
|
|
425 |
"pass controll to my first field"
|
|
|
426 |
|
|
|
427 |
fields notNil ifTrue:[
|
|
|
428 |
self makeActive:(fields first)
|
|
|
429 |
]
|
|
|
430 |
! !
|
|
|
431 |
|
|
|
432 |
!EnterFieldGroup methodsFor:'private'!
|
|
0
|
433 |
|
|
7
|
434 |
makeActive:aField
|
|
121
|
435 |
"make a specific field the active one"
|
|
|
436 |
|
|
7
|
437 |
currentField notNil ifTrue:[
|
|
121
|
438 |
currentField disable.
|
|
|
439 |
currentField hideCursor.
|
|
|
440 |
currentField hasKeyboardFocus:false.
|
|
7
|
441 |
].
|
|
|
442 |
currentField := aField.
|
|
|
443 |
currentField enable.
|
|
121
|
444 |
currentField showCursor.
|
|
|
445 |
currentField hasKeyboardFocus:true.
|
|
|
446 |
! !
|
|
7
|
447 |
|
|
121
|
448 |
!EnterFieldGroup methodsFor:'event forwarding'!
|
|
|
449 |
|
|
|
450 |
handlesKeyPress:key inView:aView
|
|
|
451 |
"query from event processor: am I interrested in key-events ?
|
|
|
452 |
yes I am (to forward it to the active field)."
|
|
|
453 |
|
|
0
|
454 |
^ true
|
|
|
455 |
!
|
|
|
456 |
|
|
121
|
457 |
handlesButtonPress:button inView:aView
|
|
|
458 |
"query from event processor: am I interrested in button-events ?
|
|
|
459 |
yes I am (to activate the clicked-on field)."
|
|
59
|
460 |
|
|
121
|
461 |
^ true
|
|
59
|
462 |
!
|
|
|
463 |
|
|
121
|
464 |
handlesButtonShiftPress:button inView:aView
|
|
|
465 |
"query from event processor: am I interrested in button-events ?
|
|
|
466 |
yes I am (to activate the clicked-on field)."
|
|
59
|
467 |
|
|
121
|
468 |
^ true
|
|
59
|
469 |
!
|
|
|
470 |
|
|
7
|
471 |
keyPress:key x:x y:y view:aView
|
|
121
|
472 |
"key-press in any field - forward the key to the active field"
|
|
0
|
473 |
|
|
|
474 |
currentField notNil ifTrue:[
|
|
69
|
475 |
currentField keyPress:key x:0 y:0
|
|
0
|
476 |
]
|
|
|
477 |
!
|
|
|
478 |
|
|
7
|
479 |
buttonPress:button x:x y:y view:aView
|
|
121
|
480 |
"clicking on a field activates it and forwards the click to it"
|
|
|
481 |
|
|
7
|
482 |
self makeActive:aView.
|
|
|
483 |
aView buttonPress:button x:x y:y
|
|
0
|
484 |
!
|
|
|
485 |
|
|
7
|
486 |
buttonShiftPress:button x:x y:y view:aView
|
|
121
|
487 |
"clicking on a field activates it and forwards the click to it"
|
|
|
488 |
|
|
7
|
489 |
self makeActive:aView.
|
|
0
|
490 |
aView buttonShiftPress:button x:x y:y
|
|
|
491 |
! !
|