Re: event problem

2017-10-29 Thread Carsten Haitzler 
On Sun, 29 Oct 2017 00:29:21 +0800 "石仔" <406643...@qq.com> said:

> hi all.
> This is my ~/.xinitrc :
>   exec xterm
> 
> I start x with 'startx' command,  and then run 'testx'. This is  source :
> /* gcc testx.c -o testx -lX11 */
>   1 #include 
>   2 #include 
>   3 int main(int argc, char *argv[])
>   4 {
>   5 
>   6 Display *display=XOpenDisplay(NULL);
>   7 Window root, parent, *child=NULL, root_win=RootWindow(display,
> DefaultScreen(display)); 8 unsigned int n;
>   9 XWindowAttributes attr;
>  10 if(XQueryTree(display, root_win, , , , ))
>  11 for(size_t i=0; i  12 if(XGetWindowAttributes(display, child[i], )
>  13 && attr.map_state == IsViewable
>  14 && XSelectInput(display, child[i], ButtonPressMask))
>  15 printf("set %x\n", child[i]);
>  16 XEvent event;
>  17 while(1)
>  18 {
>  19 XNextEvent(display, );
>  20 if(event.type == ButtonPress)
>  21 printf("type=%d, w=%x\n", event.type, event.xbutton.window);
>  22 }
>  23 }
> 
> I can not get ButtonPress when i press button. But I can get EnterNotify if i
> replace ButtonPressMask with EnterWindowMask. why ?

Because another client (xterm itself) is listening for button presses. presses
(and releases) only go to the first client to request them on a window because
of implicit grabs. You can try intercept them via parent windows (XGrabButton
+ XAllowEvent fun) which is how window managers do click to focus. Only 1
client can select for button press/release events on a window.

-- 
- Codito, ergo sum - "I code, therefore I am" --
Carsten Haitzler - ras...@rasterman.com

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Re: [PATCH libXau 0/3] remove redundant null check on calling free()

2017-10-29 Thread walter harms 


Am 28.10.2017 21:18, schrieb Daniel Martin:
> Am 28.10.2017 19:16 schrieb "walter harms" :
> 
> After the last patch for libXau i checked the code
> with smatch and started to remove remove redundant
> 
> 
> One redundant "remove" here. ;-)
> 


aehm, yes totally absolutely gone :)

re,
 wh

> All 3 patches are
> Reviewed-by: Daniel Martin 
> 
> 
> 
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event problem

2017-10-29 Thread ???? 
hi all.
This is my ~/.xinitrc :
  exec xterm

I start x with 'startx' command,  and then run 'testx'. This is  source :
/* gcc testx.c -o testx -lX11 */
  1 #include 
  2 #include 
  3 int main(int argc, char *argv[])
  4 {
  5 
  6 Display *display=XOpenDisplay(NULL);
  7 Window root, parent, *child=NULL, root_win=RootWindow(display, 
DefaultScreen(display));
  8 unsigned int n;
  9 XWindowAttributes attr;
 10 if(XQueryTree(display, root_win, , , , ))
 11 for(size_t i=0; i