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pellekrogholt/announcer_example_4_workspace

Last active August 29, 2015 13:56
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announcer_example_4_workspace
|announcerInstance announcerInstanceDoInitialize point1 point2 announcer1 announcer2|
Transcript clear.
announcerInstanceDoInitialize := false.
announcerInstance := FilteringAnnouncer current.
announcerInstanceDoInitialize ifTrue: [announcerInstance initialize].
"announcerInstanceDoInitialize ifTrue: [announcerInstance teardown]."
Transcript show: 'announcerInstance subscriptions size: ', announcerInstance subscriptions size; cr.
announcer1 := announcerInstance on: [:e | e x == 1] do: [:announcement |
Transcript show: 'do something when announcement occurs'; cr.
].
announcer2 := announcerInstance on: [:e | e y == 1] do: [:announcement |
Transcript show: 'do something when announcement occurs'; cr.
].
point1 := Point new x: 1; y: 1; yourself.
announcerInstance announce: point1.
point2 := Point new x: 1; y: 2; yourself.
announcerInstance announce: point2.
"we are a bit confused with the unsubscribe ?"
announcerInstance unsubscribe: point2.
Transcript show: 'announcerInstance subscriptions size: ', announcerInstance subscriptions size; cr.
announcerInstance off: announcer1.
announcerInstance off: announcer2.
Transcript show: 'announcerInstance subscriptions size: ', announcerInstance subscriptions size; cr.
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