"

 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' }"

UserNotification subclass:#Warning

	instanceVariableNames:''

	classVariableNames:''

	poolDictionaries:''

	category:'Kernel-Exceptions'

!

!Warning 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

"

    Warning is the superclass of all warning exceptions in the system.

    The default beavior for an unhandled Warning is to display a warn

    box with the error decription. If no display is available, the error 

    description is written to the Transcript.

    [author:]

        Stefan Vogel

    [see also:]

        Signal

"

!

examples

"

  show a warning:

                                                            [exBegin]

    Transcript showCR:'1 - now raising'.

    Warning raiseRequest.

    Transcript showCR:'2 - after the raise'.

                                                            [exEnd]

  passing an errorString:

                                                            [exBegin]

    Warning raiseRequestErrorString:'hello world'

                                                            [exEnd]

  provide a handler for warnings:

                                                            [exBegin]

    Warning handle:[:ex |

        Transcript showCR:'WARNING: ' , ex description

    ] do:[

        '...'.

        Warning raiseRequest.

        '...'.

    ].

    Warning handle:[:ex |

        Transcript showCR:'WARNING: ' , ex description

    ] do:[

        '...'.

        Warning raiseRequestErrorString:'hello world'.

        '...'.

    ]

                                                            [exEnd]

  ignore warnings during some evaluation:

                                                            [exBegin]

    Warning ignoreIn:[

        '...'.

        Warning raiseRequest.

        '...'.

    ]

                                                            [exEnd]

  defer a warning to some later time:

                                                            [exBegin]

    Warning deferAfter:[

        Transcript showCR:'1 - no warning here ...'.

        Warning raiseRequestErrorString:'this warning is deferred'.

        Transcript showCR:'2 - but in a second...'.

    ].

    Transcript showCR:'3 - after warning-protected block'.

                                                            [exEnd]

"

! !

!Warning class methodsFor:'initialization'!

initialize

    NotifierString := 'Warning:'.

    "

     self initialize

    "

    "Created: / 23.7.1999 / 15:34:27 / stefan"

! !

!Warning methodsFor:'default actions'!

defaultAction

    "Default action for warnings: open a warn box with description"

    |text|

    text := self description.

    (Smalltalk isInitialized 

     and:[Dialog notNil

     and:[Screen notNil

     and:[Screen current notNil

     and:[Screen current isOpen

    ]]]]) ifTrue:[

        Dialog autoload.        "in case its autoloaded"

        Dialog warn:text.

    ] ifFalse:[

        "

         on systems without GUI, simply show

         the message on the Transcript.

        "

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

    ].

    self proceed.

    "

      Warning raiseRequestErrorString:' abc'

    "

    "Modified: / 3.8.1999 / 14:06:41 / stefan"

! !

!Warning class methodsFor:'documentation'!

version

! !

Warning initialize!