Home » U++ Library support » U++ Callbacks and Timers » How to disable a callback?
| How to disable a callback? [message #14646] |
Wed, 05 March 2008 19:27  |
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indiocolifa
Messages: 49
Registered: January 2008
Location: Argentina
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Member |
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Suppose I "connect" a function to a class using callbacks:
Class.WhenBLAH = THISBACK(fn);
Now, I need to temporarily disable this callback, altough I've not found a suitable "null" value for the Callback type. The following obviously do not work so far:
Class.WhenBLAH=THISBACK(NULL);
Class.WhenBLAH=NULL;
Both are incompatible with Upp::Callback.
How I can do this?
[Updated on: Wed, 05 March 2008 19:28] Report message to a moderator |
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| Re: How to disable a callback? [message #14648 is a reply to message #14646] |
Wed, 05 March 2008 20:04  |
cbpporter
Messages: 1427
Registered: September 2007
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Ultimate Contributor |
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| indiocolifa wrote on Wed, 05 March 2008 20:27 |
Suppose I "connect" a function to a class using callbacks:
Class.WhenBLAH = THISBACK(fn);
Now, I need to temporarily disable this callback, altough I've not found a suitable "null" value for the Callback type. The following obviously do not work so far:
Class.WhenBLAH=THISBACK(NULL);
Class.WhenBLAH=NULL;
Both are incompatible with Upp::Callback.
How I can do this?
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You can use Class.WhenBLAH = Callback() to denote a "null" callback, as in no action.
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