Unterschiede
Hier werden die Unterschiede zwischen zwei Versionen angezeigt.
Beide Seiten der vorigen Revision Vorhergehende Überarbeitung Nächste Überarbeitung | Vorhergehende Überarbeitung | ||
xojo:objectnotifier:start [2021/04/02 13:11] mz |
xojo:objectnotifier:start [2021/04/06 09:27] (aktuell) mz [Object notification] |
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<WRAP round download 40%> | <WRAP round download 40%> | ||
- | {{ : | + | **{{ : |
{{ : | {{ : | ||
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- | This works similar to the built-in interfaces dataNotifier and dataNotificationReceiver.\\ | + | This works similar to the built-in interfaces |
However the **ObjectChanged** method receives two parameters: an **Object** from the notifier and any **info** from the original subscriber.\\ | However the **ObjectChanged** method receives two parameters: an **Object** from the notifier and any **info** from the original subscriber.\\ | ||
- | The **notifier** may send himself by setting " | + | The **notifier** may send himself by setting " |
The **subscriber** stores any sort of (static) information together with the callback-address when subscribing by // | The **subscriber** stores any sort of (static) information together with the callback-address when subscribing by // | ||
This info may be a simple index number, but it can also be a whole object (means a reference to an object) so that the receiver can distinguish which subscription called him. | This info may be a simple index number, but it can also be a whole object (means a reference to an object) so that the receiver can distinguish which subscription called him. | ||
Zeile 20: | Zeile 20: | ||
Simply instantiate this class and call their members like: | Simply instantiate this class and call their members like: | ||
- | + | Declare: | |
- | | + | |
private property onb as ObjectNotifierBox | private property onb as ObjectNotifierBox | ||
- | ----- | + | in //Constructor// Method: |
- | | + | |
onb = new ObjectNotifierBox | onb = new ObjectNotifierBox | ||
- | ----- | + | Actual implementation of the // |
- | Method: | + | |
Sub addObjectNotificationReceiver(receiver as objectNotificationReceiver, | Sub addObjectNotificationReceiver(receiver as objectNotificationReceiver, | ||
| | ||
End Sub | End Sub | ||
- | + | ||
- | Method: | + | |
Sub removeObjectNotificationReceiver(receiver As objectNotificationReceiver) | Sub removeObjectNotificationReceiver(receiver As objectNotificationReceiver) | ||
| | ||
End Sub | End Sub | ||
- | For calling all receivers write: | + | For calling all subscribed |
onb.callReceivers(me) | onb.callReceivers(me) | ||
Zeile 43: | Zeile 39: | ||
Instead of " | Instead of " | ||
+ | <WRAP round important 100%> | ||
+ | Be careful with // | ||
+ | < | ||
+ | xy.addObjectNotificationReceiver(me, | ||
+ | xy.addObjectNotificationReceiver(me, | ||
+ | </ | ||
+ | Because // | ||
+ | It's therefore not possible to delete only the second entry (with //info// 2). | ||
+ | |||
+ | </ | ||
+ | |||
+ | |||
+ | |||
+ | ====== Sourcecode ====== | ||
{{ : | {{ : | ||
Zeile 102: | Zeile 112: | ||
Properties | Properties | ||
| | ||
- | mInfos() As Variant | + | |
- | mReceivers() As objectNotificationReceiver | + | |
| | ||
End Class | End Class |