Re: Copy to clipboard for Linux

[Dave D. <dde...@es...>]

Daniel J Sebald <dan...@ie...> writes:

> Daniel J Sebald wrote:
>
>> SO, the idea is to force the requestor window to clear all pending updates before sending the event.  Here's the additional command:
>> 

[snip]

>  
> +	    /* Make sure things are ready on the requestor window. */
> +	    XFlush(dpy);
> +
>  	    XSendEvent(dpy, reply.xselection.requestor, False, 0L, &reply);
> -	    /* we never block on XNextEvent(), so must flush manually
> -	     * (took me *ages* to find this out !)
> -	     */
>  
> -	    XFlush(dpy);
>
> The flush should be before sending the event.  (That comment may be a red herring.)
>

With no flush afterwards..?

This really concerns me : you are basically relying on a delay to make
things work. There will be a flush soon anyway,

All the flush is doing is forcing them to be written to the socket
fd.  You have no guarantee that it has actually been written over
the network. So the send event may still actually get transmitted in
the same buffer. The only way to gaurantee that it has actually been
processed by the X server is to use XSync() rather than XFlush.

I believe that X is deterministic, and so if you have to
solve it this way, you've missed the real problem somewhere.

dd
-- 
Dave Denholm              <dde...@es...>       http://www.esmertec.com