"

 COPYRIGHT (c) 1999 by eXept Software AG

              All Rights Reserved

 This software is furnished under a license and may be used

 only in accordance with the terms of that license and with the

 inclusion of the above copyright notice.   This software may not

 be provided or otherwise made available to, or used by, any

 other person.  No title to or ownership of the software is

 hereby transferred.

"

"{ Package: 'stx:libbasic' }"

Notification subclass:#UserNotification

	instanceVariableNames:''

	classVariableNames:''

	poolDictionaries:''

	category:'Kernel-Exceptions-Notifications'

!

!UserNotification class methodsFor:'documentation'!

copyright

"

 COPYRIGHT (c) 1999 by eXept Software AG

              All Rights Reserved

 This software is furnished under a license and may be used

 only in accordance with the terms of that license and with the

 inclusion of the above copyright notice.   This software may not

 be provided or otherwise made available to, or used by, any

 other person.  No title to or ownership of the software is

 hereby transferred.

"

!

documentation

"    

    UserNotification is the superclass of all user notification 

    signals in the system. It produces an info box with the message on the screen. 

    If no display is available, the message is written to the Transcript (headless operation).

    [author:]

        Stefan Vogel

    [see also:]

        Signal

"

!

examples

"

                                                            [exBegin]

    UserNotification raiseRequest

                                                            [exEnd]

                                                            [exBegin]

    UserNotification raiseErrorString:'huh ?'

                                                            [exEnd]

                                                            [exBegin]

    UserNotification raiseRequestWith:nil errorString:'what ?'

                                                            [exEnd]

                                                            [exBegin]

    UserNotification raiseRequestWith:nil errorString:' what ?'

                                                            [exEnd]

"

! !

!UserNotification class methodsFor:'initialization'!

initialize

    NotifierString := 'User Notification:'.

    "

     self initialize

    "

    "Created: / 23.7.1999 / 15:31:44 / stefan"

! !

!UserNotification class methodsFor:'notification'!

notify:aString

    self raiseErrorString:aString

! !

!UserNotification class methodsFor:'testing'!

isQuerySignal

    ^ true

! !

!UserNotification methodsFor:'default actions'!

defaultAction

    "Default action for notifications: open a info box with description"

    |text|

    text := self description.

    self hasDialog ifTrue:[

        Dialog information:text.

    ] ifFalse:[

        "

         on systems without GUI, simply show

         the message on the Transcript.

        "

        Transcript show:'notification: '; showCR:text.

    ].

    self proceed.

    "

      UserNotification raiseRequestErrorString:' abc'

    "

    "Modified: / 3.8.1999 / 14:06:55 / stefan"

! !

!UserNotification methodsFor:'helpers'!

hasDialog

    "answer true, if we can use a Dialog window"

    (Smalltalk isInitialized 

     and:[Dialog notNil

     and:[Screen notNil

     and:[Screen current notNil

     and:[Screen current isOpenAndDispatching

    ]]]]) ifTrue:[

        Dialog autoload.        "in case its autoloaded"

        ^ true.

    ].

    ^ false

! !

!UserNotification class methodsFor:'documentation'!

version

    ^ '$Header: /cvs/stx/stx/libbasic/UserNotification.st,v 1.15 2009/10/14 17:34:46 cg Exp $'

!

version_CVS

    ^ '§Header: /cvs/stx/stx/libbasic/UserNotification.st,v 1.15 2009/10/14 17:34:46 cg Exp §'

!

version_SVN

! !

UserNotification initialize!