[signals] call a slot only once - Boost-users - lists.preview.boost.org

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[signals] call a slot only once

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Christian Holmquist

2 Oct 2007 2 Oct '07

9:49 a.m.

Hello, Is there a way to automatically have a slot disconnected after it has been called once, without managing the connection manually? void f() { } signal sig; sig.connect(&f); sig(); // f gets called sig(); // f shouldn't get called

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Christian Holmquist

2 Oct 2 Oct

10:07 a.m.

Nevermind, I'll just keep a vector<connection> in a signal-derived class, and disconnects these after every invocation of the signal. Maybe not the most clever way, but it works. If there is an efficient way of doing this, I'll be happy to now about it though. Thanks, Christian On 02/10/2007, Christian Holmquist wrote:

Hello,

Is there a way to automatically have a slot disconnected after it has been called once, without managing the connection manually?

void f() { }

signal sig; sig.connect(&f); sig(); // f gets called sig(); // f shouldn't get called

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Frank Mori Hess

12:58 p.m.

On Tuesday 02 October 2007 05:49 am, Christian Holmquist wrote:

Hello,

Is there a way to automatically have a slot disconnected after it has been called once, without managing the connection manually?

You can have the slot disconnect itself. -- Frank

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Christian Holmquist

6:20 p.m.

How? Could you provide me with some example code? I read the documentation on connection management and didn't find anything pointing me in the right direction. Christian On 02/10/2007, Frank Mori Hess wrote:

On Tuesday 02 October 2007 05:49 am, Christian Holmquist wrote:

...
Hello,

Is there a way to automatically have a slot disconnected after it has been called once, without managing the connection manually?

You can have the slot disconnect itself.

-- Frank

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Frank Mori Hess

6:47 p.m.

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On Tuesday 02 October 2007 14:20 pm, Christian Holmquist wrote:

How?

Could you provide me with some example code? I read the documentation on connection management and didn't find anything pointing me in the right direction.

I just meant that you can call connection::disconnect() at the end of your slot function, as long as you somehow give it access to its connection object. - -- Frank -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.6 (GNU/Linux) iD8DBQFHApIn5vihyNWuA4URAtw9AJ9tRw6yDcZN4xf2NvZechEmhK0iQACcC0Z1 PABoxISv96lB9NM3x9STcSA= =a0AK -----END PGP SIGNATURE-----

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Christian Holmquist
Frank Mori Hess