Implemented key filter support on platform input context

As previously with QInputContext, now supporting filterEvent()
interface. Usage only on XCB so far.

Change-Id: I8e5972626552bda32318fe060017d0217bb79a94
Reviewed-on: http://codereview.qt-project.org/5240
Reviewed-by: Qt Sanity Bot <qt_sanity_bot@ovi.com>
Reviewed-by: Joona Petrell <joona.t.petrell@nokia.com>
Reviewed-by: Lars Knoll <lars.knoll@nokia.com>

3 files changed, 17 insertions, 3 deletions

diff --git a/src/gui/kernel/qplatforminputcontext_qpa.cpp b/src/gui/kernel/qplatforminputcontext_qpa.cpp
index 0fdcd9e9ac..3459046dab 100644
--- a/src/gui/kernel/qplatforminputcontext_qpa.cpp
+++ b/src/gui/kernel/qplatforminputcontext_qpa.cpp
@@ -78,6 +78,11 @@ void QPlatformInputContext::invokeAction(QInputPanel::Action action, int cursorP
         reset();
 }
 
+bool QPlatformInputContext::filterEvent(const QEvent *event)
+{
+    return false;
+}
+
 QRectF QPlatformInputContext::keyboardRect() const
 {
     return QRectF();
diff --git a/src/gui/kernel/qplatforminputcontext_qpa.h b/src/gui/kernel/qplatforminputcontext_qpa.h
index 35763edf13..f4efc3e92d 100644
--- a/src/gui/kernel/qplatforminputcontext_qpa.h
+++ b/src/gui/kernel/qplatforminputcontext_qpa.h
@@ -66,7 +66,7 @@ public:
     virtual void commit();
     virtual void update(Qt::InputMethodQueries);
     virtual void invokeAction(QInputPanel::Action, int cursorPosition);
-
+    virtual bool filterEvent(const QEvent *event);
     virtual QRectF keyboardRect() const;
     void emitKeyboardRectChanged() const;
 
diff --git a/src/plugins/platforms/xcb/qxcbkeyboard.cpp b/src/plugins/platforms/xcb/qxcbkeyboard.cpp
index cb65a5106e..b5722e7eeb 100644
--- a/src/plugins/platforms/xcb/qxcbkeyboard.cpp
+++ b/src/plugins/platforms/xcb/qxcbkeyboard.cpp
@@ -1026,9 +1026,9 @@ void QXcbKeyboard::handleKeyEvent(QWindow *window, QEvent::Type type, xcb_keycod
 
     QByteArray chars;
     xcb_keysym_t sym = lookupString(window, state, code, type, &chars);
+    QPlatformInputContext *inputContext = QGuiApplicationPrivate::platformIntegration()->inputContext();
 
-
-    if (QObject* inputContext = QGuiApplicationPrivate::platformIntegration()->inputContext()) {
+    if (inputContext) {
         bool retval = false;
         if (inputContext->metaObject()->indexOfMethod("x11FilterEvent") != -1)
             QMetaObject::invokeMethod(inputContext, "x11FilterEvent", Qt::DirectConnection,
@@ -1045,6 +1045,15 @@ void QXcbKeyboard::handleKeyEvent(QWindow *window, QEvent::Type type, xcb_keycod
     int qtcode = 0;
     int count = chars.count();
     QString string = translateKeySym(sym, state, qtcode, modifiers, chars, count);
+
+    if (inputContext) {
+        QKeyEvent event(type, qtcode, modifiers, string);
+        event.setTimestamp(time);
+        bool retval = inputContext->filterEvent(&event);
+        if (retval)
+            return;
+    }
+
     QWindowSystemInterface::handleExtendedKeyEvent(window, time, type, qtcode, modifiers,
                                                    code, 0, state, string.left(count));
 }