author | Jan Vrany <jan.vrany@fit.cvut.cz> |
Mon, 26 Apr 2010 19:26:38 +0100 | |
branch | jv |
changeset 17761 | b0e5971141bc |
parent 17711 | 39faaaf888b4 |
child 17845 | 7e0cfaac936d |
permissions | -rw-r--r-- |
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COPYRIGHT (c) 2007 by eXept Software AG |
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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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"{ Package: 'stx:libbasic' }" |
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UserNotification subclass:#UserConfirmation |
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instanceVariableNames:'canCancel defaultAnswerInDialog defaultAnswer' |
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classVariableNames:'' |
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poolDictionaries:'' |
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category:'Kernel-Exceptions-Notifications' |
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! |
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!UserConfirmation class methodsFor:'documentation'! |
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copyright |
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" |
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COPYRIGHT (c) 2007 by eXept Software AG |
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All Rights Reserved |
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This software is furnished under a license and may be used |
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only in accordance with the terms of that license and with the |
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inclusion of the above copyright notice. This software may not |
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be provided or otherwise made available to, or used by, any |
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other person. No title to or ownership of the software is |
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hereby transferred. |
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" |
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! |
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documentation |
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" |
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This confirmation query is used when a user confirmation is required |
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somewhere within a model's operation (i.e. in non-GUI code). |
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Instead of directly asking via Dialog confirm... messages, |
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this should be raised. |
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Its default behavior is the same as the above dialog. |
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However, the query can be cought and answered by an exceoptn (a query-) handler, |
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to suppress these GUI interactions in situations, where they are not wanted. |
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This is a much better approach to the alternatives: |
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passing additional 'doConfirm' arguments down from the high level caller |
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keeping the doConfirm settings in a passed down flag object |
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keeping the flag in a global (very bad) |
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keeping it in a class var (almost as bad) |
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Notice: thats one of the nice consequences of proceedable exceptions. |
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[authors:] |
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Stefan Vogel |
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Claus Gittinger |
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[see also:] |
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Query Notification Exception |
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! ! |
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!UserConfirmation methodsFor:'accessing'! |
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aspect |
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"the aspect the user is asked. Set this to a symbol. |
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It can be used by a exception handler" |
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^ parameter |
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! |
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aspect:aSymbol |
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"the aspect the user is asked. Set this to a symbol. |
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It can be used by a exception handler" |
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parameter := aSymbol |
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canCancel |
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"answer true, if the user is allowed to press the cancel button |
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in a confirmation dialog" |
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^ canCancel ? false |
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canCancel:something |
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canCancel := something. |
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defaultAnswer |
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"used to pass information from the raiser to the GUI dialog. |
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Specifies, which answer of the three (yes/no/cancel) should be the return-key-default. |
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If not specified, the cancel-key will be the default" |
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^ defaultAnswer |
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defaultAnswer:aBooleanOrNil |
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"used to pass information from the raiser to the GUI dialog. |
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Specifies, which answer of the three (yes/no/cancel) should be the return-key-default. |
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If not specified, the cancel-key will be the default" |
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defaultAnswer := aBooleanOrNil |
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! ! |
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!UserConfirmation methodsFor:'default actions'! |
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defaultAction |
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"Default action for confirmations: open a info box with description. |
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If no GUI present, assume that the user pressed 'yes'" |
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|text retVal retValText| |
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text := self description. |
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self hasDialog ifTrue:[ |
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self canCancel ifTrue:[ |
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^ Dialog confirmWithCancel:text default:defaultAnswer |
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] ifFalse:[ |
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^ Dialog confirm:text default:defaultAnswer |
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]. |
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]. |
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" |
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on systems without GUI, simply show |
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the message on the Transcript and assume, that he would have typed 'yes' (or the defaultAnswer). |
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retVal := defaultAnswer notNil |
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ifTrue:[ defaultAnswer ] |
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ifFalse:[ |
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self canCancel |
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ifTrue:[ nil ] |
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ifFalse:[ true ]]. |
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retValText := retVal isNil |
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ifTrue:[ 'cancel' ] |
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ifFalse:[ |
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retVal |
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ifTrue:[ 'yes' ] |
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ifFalse:[ 'no' ]]. |
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Transcript |
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show:('User confirmation requested (assuming %1): ' bindWith:retValText); |
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showCR:text. |
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^ retVal |
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" |
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UserConfirmation raiseRequestErrorString:'Please click yes or no!!' |
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" |
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! ! |
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!UserConfirmation class methodsFor:'documentation'! |
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version |
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17761
b0e5971141bc
Added Lookup and BuiltinLookup classes
Jan Vrany <jan.vrany@fit.cvut.cz>
parents:
17711
diff
changeset
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^ '$Id: UserConfirmation.st 10517 2010-04-26 18:26:38Z vranyj1 $' |
b0e5971141bc
Added Lookup and BuiltinLookup classes
Jan Vrany <jan.vrany@fit.cvut.cz>
parents:
17711
diff
changeset
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! |
b0e5971141bc
Added Lookup and BuiltinLookup classes
Jan Vrany <jan.vrany@fit.cvut.cz>
parents:
17711
diff
changeset
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b0e5971141bc
Added Lookup and BuiltinLookup classes
Jan Vrany <jan.vrany@fit.cvut.cz>
parents:
17711
diff
changeset
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version_SVN |
b0e5971141bc
Added Lookup and BuiltinLookup classes
Jan Vrany <jan.vrany@fit.cvut.cz>
parents:
17711
diff
changeset
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^ '$Id: UserConfirmation.st 10517 2010-04-26 18:26:38Z vranyj1 $' |
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! ! |