Add a new WA_X11DoNotAcceptFocus attribute for top-level widgets.

This should prevent window managers from ever sending a WM_TAKE_FOCUS
message to those windows (useful for IM windows like virtual keyboards,
notification banners, etc.)

Reviewed-by: bhughes

3 files changed, 26 insertions, 1 deletions

diff --git a/src/gui/kernel/qwidget.cpp b/src/gui/kernel/qwidget.cpp
index af5fcd1..e88026c 100644
--- a/src/gui/kernel/qwidget.cpp
+++ b/src/gui/kernel/qwidget.cpp
@@ -10550,6 +10550,10 @@ void QWidget::setAttribute(Qt::WidgetAttribute attribute, bool on)
     case Qt::WA_X11OpenGLOverlay:
         d->updateIsOpaque();
         break;
+    case Qt::WA_X11DoNotAcceptFocus:
+        if (testAttribute(Qt::WA_WState_Created))
+            d->updateX11AcceptFocus();
+        break;
 #endif
     case Qt::WA_DontShowOnScreen: {
         if (on && isVisible()) {
diff --git a/src/gui/kernel/qwidget_p.h b/src/gui/kernel/qwidget_p.h
index 2cb8586..c32e1a1 100644
--- a/src/gui/kernel/qwidget_p.h
+++ b/src/gui/kernel/qwidget_p.h
@@ -703,6 +703,7 @@ public:
     void setNetWmWindowTypes();
     void x11UpdateIsOpaque();
     bool isBackgroundInherited() const;
+    void updateX11AcceptFocus();
 #elif defined(Q_WS_WIN) // <--------------------------------------------------------- WIN
     uint noPaintOnScreen : 1; // see qwidget_win.cpp ::paintEngine()
     uint nativeGesturePanEnabled : 1;
diff --git a/src/gui/kernel/qwidget_x11.cpp b/src/gui/kernel/qwidget_x11.cpp
index 54dd300..c1363d2 100644
--- a/src/gui/kernel/qwidget_x11.cpp
+++ b/src/gui/kernel/qwidget_x11.cpp
@@ -780,7 +780,7 @@ void QWidgetPrivate::create_sys(WId window, bool initializeWindow, bool destroyO
         XWMHints wm_hints;                        // window manager hints
         memset(&wm_hints, 0, sizeof(wm_hints)); // make valgrind happy
         wm_hints.flags = InputHint | StateHint | WindowGroupHint;
-        wm_hints.input = True;
+        wm_hints.input = q->testAttribute(Qt::WA_X11DoNotAcceptFocus) ? False : True;
         wm_hints.initial_state = NormalState;
         wm_hints.window_group = X11->wm_client_leader;
 
@@ -3050,4 +3050,24 @@ void qt_x11_getX11InfoForWindow(QX11Info * xinfo, const QX11WindowAttributes &at
     xinfo->setX11Data(xd);
 }
 
+void QWidgetPrivate::updateX11AcceptFocus()
+{
+    Q_Q(QWidget);
+    if (!q->isWindow() || !q->internalWinId())
+        return;
+
+    XWMHints *h = XGetWMHints(X11->display, q->internalWinId());
+    XWMHints wm_hints;
+    if (!h) {
+        memset(&wm_hints, 0, sizeof(wm_hints)); // make valgrind happy
+        h = &wm_hints;
+    }
+    h->flags |= InputHint;
+    h->input = q->testAttribute(Qt::WA_X11DoNotAcceptFocus) ? False : True;
+
+    XSetWMHints(X11->display, q->internalWinId(), h);
+    if (h != &wm_hints)
+        XFree((char *)h);
+}
+
 QT_END_NAMESPACE