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(sys_kill): Attach to current foreground thread

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when grabbing focus; necessary on NT 5.0.
This commit is contained in:
Andrew Innes 1999-05-02 10:27:27 +00:00
parent 55dcfc1588
commit f446016fdb
1 changed files with 49 additions and 16 deletions
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65
src/w32proc.c
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@ -1359,25 +1359,58 @@ sys_kill (int pid, int sig)
}
foreground_window = GetForegroundWindow ();
if (foreground_window && SetForegroundWindow (cp->hwnd))
if (foreground_window)
{
/* Generate keystrokes as if user had typed Ctrl-Break or
Ctrl-C. */
keybd_event (VK_CONTROL, control_scan_code, 0, 0);
keybd_event (vk_break_code, break_scan_code,
(vk_break_code == 'C' ? 0 : KEYEVENTF_EXTENDEDKEY), 0);
keybd_event (vk_break_code, break_scan_code,
(vk_break_code == 'C' ? 0 : KEYEVENTF_EXTENDEDKEY)
| KEYEVENTF_KEYUP, 0);
keybd_event (VK_CONTROL, control_scan_code, KEYEVENTF_KEYUP, 0);
/* NT 5.0, and apparently also Windows 98, will not allow
a Window to be set to foreground directly without the
user's involvement. The workaround is to attach
ourselves to the thread that owns the foreground
window, since that is the only thread that can set the
foreground window. */
DWORD foreground_thread, child_thread;
foreground_thread =
GetWindowThreadProcessId (foreground_window, NULL);
if (foreground_thread == GetCurrentThreadId ()
|| !AttachThreadInput (GetCurrentThreadId (),
foreground_thread, TRUE))
foreground_thread = 0;
/* Sleep for a bit to give time for Emacs frame to respond
to focus change events (if Emacs was active app). */
Sleep (10);
child_thread = GetWindowThreadProcessId (cp->hwnd, NULL);
if (child_thread == GetCurrentThreadId ()
|| !AttachThreadInput (GetCurrentThreadId (),
child_thread, TRUE))
child_thread = 0;
SetForegroundWindow (foreground_window);
}
}
/* Set the foreground window to the child. */
if (SetForegroundWindow (cp->hwnd))
{
/* Generate keystrokes as if user had typed Ctrl-Break or
Ctrl-C. */
keybd_event (VK_CONTROL, control_scan_code, 0, 0);
keybd_event (vk_break_code, break_scan_code,
(vk_break_code == 'C' ? 0 : KEYEVENTF_EXTENDEDKEY), 0);
keybd_event (vk_break_code, break_scan_code,
(vk_break_code == 'C' ? 0 : KEYEVENTF_EXTENDEDKEY)
| KEYEVENTF_KEYUP, 0);
keybd_event (VK_CONTROL, control_scan_code,
KEYEVENTF_KEYUP, 0);
/* Sleep for a bit to give time for Emacs frame to respond
to focus change events (if Emacs was active app). */
Sleep (100);
SetForegroundWindow (foreground_window);
}
/* Detach from the foreground and child threads now that
the foreground switching is over. */
if (foreground_thread)
AttachThreadInput (GetCurrentThreadId (),
foreground_thread, FALSE);
if (child_thread)
AttachThreadInput (GetCurrentThreadId (),
child_thread, FALSE);
}
}
/* Ctrl-Break is NT equivalent of SIGINT. */
else if (!GenerateConsoleCtrlEvent (CTRL_BREAK_EVENT, pid))
{