-
Bug
-
Resolution: Done
-
P3: Somewhat important
-
4.4.2
-
None
-
26b572903a800163972817cd717b5df454b96eb2
In void QWidget::activateWindow(), XSetInputFocus() can be called on a window which is Unviewable or Unmapped. The call fails and return a BadMatch error (this behavior is not described in the man page, it is described in the XLib programming Manual).
Here is a patch to avoid the issue:
diff --git a/src/gui/kernel/qwidget_x11.cpp b/src/gui/kernel/qwidget_x11.cpp
index 79ee8c9..766a301 100644
--- a/src/gui/kernel/qwidget_x11.cpp
+++ b/src/gui/kernel/qwidget_x11.cpp
@@ -1509,9 +1509,14 @@ QWidget *QWidget::keyboardGrabber()
void QWidget::activateWindow()
{
- Q_D(QWidget);
QWidget *tlw = window();
if (tlw->isVisible() && !tlw->d_func()->topData()->embedded && !X11->deferred_map.contains(tlw)) {
+
+ XWindowAttributes attributes;
+ XGetWindowAttributes(X11->display, tlw->internalWinId(), &attributes);
+ if(attributes.map_state != IsViewable)
+ return;
+
if (X11->userTime == 0)
X11->userTime = X11->time;
qt_net_update_user_time(tlw, X11->userTime);
diff --git a/src/gui/kernel/qapplication_x11.cpp b/src/gui/kernel/qapplication_x11.cpp
index e21c573..c8277bb 100644
--- a/src/gui/kernel/qapplication_x11.cpp
+++ b/src/gui/kernel/qapplication_x11.cpp
@@ -632,11 +632,6 @@ static int qt_x_errhandler(Display *dpy, XErrorEvent *err)
return 0;
break;
- case BadMatch:
- if (err->request_code == 42 /* X_SetInputFocus */)
- return 0;
- break;
-
default:
if (err->request_code == X11->xinput_major
&& err->error_code == (X11->xinput_errorbase + XI_BadDevice)