Add EventSourceHelperSetter

Change-Id: I91b76f1206fa0b6c398f0913586757c6419936b4
Reviewed-by: Sean Harmer <sean.harmer@kdab.com>

3 files changed, 169 insertions, 2 deletions

diff --git a/src/input/backend/backend.pri b/src/input/backend/backend.pri
index bb1806cae..b57dc2a28 100644
--- a/src/input/backend/backend.pri
+++ b/src/input/backend/backend.pri
@@ -29,7 +29,8 @@ HEADERS += \
     $$PWD/genericdevicebackendnode_p.h \
     $$PWD/inputchord_p.h \
     $$PWD/inputsequence_p.h \
-    $$PWD/inputsettings_p.h
+    $$PWD/inputsettings_p.h \
+    $$PWD/eventsourcesetterhelper_p.h
 
 SOURCES += \
     $$PWD/keyboardcontroller.cpp \
@@ -57,6 +58,7 @@ SOURCES += \
     $$PWD/genericdevicebackendnode.cpp \
     $$PWD/inputchord.cpp \
     $$PWD/inputsequence.cpp \
-    $$PWD/inputsettings.cpp
+    $$PWD/inputsettings.cpp \
+    $$PWD/eventsourcesetterhelper.cpp
 
 INCLUDEPATH += $$PWD
diff --git a/src/input/backend/eventsourcesetterhelper.cpp b/src/input/backend/eventsourcesetterhelper.cpp
new file mode 100644
index 000000000..1dc85a24b
--- /dev/null
+++ b/src/input/backend/eventsourcesetterhelper.cpp
@@ -0,0 +1,75 @@
+/****************************************************************************
+**
+** Copyright (C) 2016 Klaralvdalens Datakonsult AB (KDAB).
+** Contact: http://www.qt-project.org/legal
+**
+** This file is part of the Qt3D module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL3$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see http://www.qt.io/terms-conditions. For further
+** information use the contact form at http://www.qt.io/contact-us.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 3 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPLv3 included in the
+** packaging of this file. Please review the following information to
+** ensure the GNU Lesser General Public License version 3 requirements
+** will be met: https://www.gnu.org/licenses/lgpl.html.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 2.0 or later as published by the Free
+** Software Foundation and appearing in the file LICENSE.GPL included in
+** the packaging of this file. Please review the following information to
+** ensure the GNU General Public License version 2.0 requirements will be
+** met: http://www.gnu.org/licenses/gpl-2.0.html.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "eventsourcesetterhelper_p.h"
+#include "inputhandler_p.h"
+#include <Qt3DCore/private/qeventfilterservice_p.h>
+
+QT_BEGIN_NAMESPACE
+
+namespace Qt3DInput {
+
+namespace Input {
+
+EventSourceSetterHelper::EventSourceSetterHelper(Qt3DCore::QEventFilterService *service,
+                                                 InputHandler *inputHandler)
+    : QObject()
+    , m_service(service)
+    , m_inputHandler(inputHandler)
+{
+}
+
+// Any thread
+void EventSourceSetterHelper::setEventSource(QObject *eventSource)
+{
+    QMetaObject::invokeMethod(this,
+                              "setEventSourceHelper",
+                              Qt::BlockingQueuedConnection,
+                              Q_ARG(QObject *, eventSource));
+}
+
+// Main Thread
+void EventSourceSetterHelper::setEventSourceHelper(QObject *eventSource)
+{
+    m_service->initialize(eventSource);
+    m_inputHandler->registerEventFilters(m_service);
+}
+
+} // Input
+
+} // Qt3DInput
+
+QT_END_NAMESPACE
diff --git a/src/input/backend/eventsourcesetterhelper_p.h b/src/input/backend/eventsourcesetterhelper_p.h
new file mode 100644
index 000000000..4a948be6a
--- /dev/null
+++ b/src/input/backend/eventsourcesetterhelper_p.h
@@ -0,0 +1,90 @@
+/****************************************************************************
+**
+** Copyright (C) 2016 Klaralvdalens Datakonsult AB (KDAB).
+** Contact: http://www.qt-project.org/legal
+**
+** This file is part of the Qt3D module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL3$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see http://www.qt.io/terms-conditions. For further
+** information use the contact form at http://www.qt.io/contact-us.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 3 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPLv3 included in the
+** packaging of this file. Please review the following information to
+** ensure the GNU Lesser General Public License version 3 requirements
+** will be met: https://www.gnu.org/licenses/lgpl.html.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 2.0 or later as published by the Free
+** Software Foundation and appearing in the file LICENSE.GPL included in
+** the packaging of this file. Please review the following information to
+** ensure the GNU General Public License version 2.0 requirements will be
+** met: http://www.gnu.org/licenses/gpl-2.0.html.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef EVENTSOURCESETTERHELPER_H
+#define EVENTSOURCESETTERHELPER_H
+
+//
+//  W A R N I N G
+//  -------------
+//
+// This file is not part of the Qt API.  It exists for the convenience
+// of other Qt classes.  This header file may change from version to
+// version without notice, or even be removed.
+//
+// We mean it.
+//
+
+#include <QObject>
+
+QT_BEGIN_NAMESPACE
+
+namespace Qt3DCore {
+class QEventFilterService;
+}
+
+namespace Qt3DInput {
+
+namespace Input {
+
+class InputHandler;
+
+class EventSourceSetterHelper : public QObject
+{
+    Q_OBJECT
+public:
+    explicit EventSourceSetterHelper(Qt3DCore::QEventFilterService *service,
+                                     InputHandler *m_inputHandler);
+
+    // Called from any thread
+    void setEventSource(QObject *eventSource);
+
+private Q_SLOTS:
+    // Called in main thread
+    void setEventSourceHelper(QObject *);
+
+private:
+    Qt3DCore::QEventFilterService *m_service;
+    InputHandler *m_inputHandler;
+};
+
+} // Input
+
+} // Qt3DInput
+
+QT_END_NAMESPACE
+
+#endif // EVENTSOURCESETTERHELPER_H