Changeset 52266 in vbox for trunk/src/VBox/Frontends/VirtualBox

Timestamp:

Aug 4, 2014 1:59:14 PM (10 years ago)

Author:

vboxsync

Message:

FE/Qt: suppress unwanted FocusIn events on X11 hosts which could cause focus cycles between machine windows.

File:

• trunk/src/VBox/Frontends/VirtualBox/src/runtime/UIKeyboardHandler.cpp (modified) (1 diff)

trunk/src/VBox/Frontends/VirtualBox/src/runtime/UIKeyboardHandler.cpp

@@ -203 +203 @@
                  * and after we will just ignore that issue: */
                 int cTriesLeft = 50;
+                XEvent dummy;
                 while (cTriesLeft && XGrabKeyboard(QX11Info::display(), m_windows[m_iKeyboardCaptureViewIndex]->winId(), False, GrabModeAsync, GrabModeAsync, CurrentTime)) { --cTriesLeft; }
+                /* If the grab succeeds, X will insert a FocusIn event for this
+                 * window into the event queue.  If we have two windows they can
+                 * end up in an endless cycle of passing the focus back and
+                 * forward as there is always a pending FocusIn for each, and we
+                 * drop and re-take the grab each time the focus changes.  So we
+                 * remove the event again before Qt can see it. */
+                if (cTriesLeft > 0)
+                    XCheckTypedWindowEvent(QX11Info::display(),
+                            m_windows[m_iKeyboardCaptureViewIndex]->winId(),
+                            XFocusIn, &dummy);
                 break;
             }