(ASM, C ) input.device

[Asman]

I'm looking for docs, examples for input.device.
I read RKM Devices and saw example ) but I still don't understand what should I do when I added input handler. any ideas, examples docs are welcome

[thomas]

The question is what you want to do. An input handler is called whenever input events arrive. It gets the input event chain as parameter and it can do whatever it wants with it: it can remove events from the chain, it can add events, it can change existing events or it can just browse the chaing doing something else.

For example it can swap the left and right mouse buttons by changing the mouse button events. That's what the RKRM example does IIRC. Here is a similar example which swaps the left and right Amiga keys: http://thomas-rapp.homepage.t-online.../SwapAmiga.lha

Here is an example which signals the main program whenever a left mouse button event arrives: http://thomas-rapp.homepage.t-online...WaitForClick.c

Edit: just found a bug in the WaitForClick source: it does not close the device if the user pressed Ctrl-C. The (rc == 0) at the end should be (rc <= RETURN_WARN).

[Asman]

Thank you. Your example (WaitForClick.c ) is perfect for me. Now I understand.

[thomas]

Found another bug:

handler and req need to be initialized to NULL in the beginning because if CreateMsgPort() fails they don't get assigned a value.

[Asman]

You're right.

Personally I always set pointers to NULL . I think also that would be better if declaration of sigs will be moved into begin of else block, coz you uses sigs only in that block . Of course, it's only proposal .