PickEventFilter

Will take care of storing MouseEvents that will then be used by the renderer
for picking

Change-Id: I4d87f8a14975b7fb58484b8847bf07759b1262e0
Reviewed-by: Sean Harmer <sean.harmer@kdab.com>

3 files changed, 167 insertions, 2 deletions

diff --git a/src/render/backend/pickeventfilter.cpp b/src/render/backend/pickeventfilter.cpp
new file mode 100644
index 000000000..deaa83d3d
--- /dev/null
+++ b/src/render/backend/pickeventfilter.cpp
@@ -0,0 +1,81 @@
+/****************************************************************************
+**
+** Copyright (C) 2015 Paul Lemire paul.lemire350@gmail.com
+** 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 "pickeventfilter_p.h"
+
+QT_BEGIN_NAMESPACE
+
+namespace Qt3DRender {
+
+namespace Render {
+
+PickEventFilter::PickEventFilter(QObject *parent)
+    : QObject(parent)
+{
+}
+
+PickEventFilter::~PickEventFilter()
+{
+}
+
+// main thread (aspect->jobsToExecute)
+QList<QMouseEvent> PickEventFilter::pendingEvents()
+{
+    QList<QMouseEvent> cpy(m_pendingEvents);
+    m_pendingEvents.clear();
+    return cpy;
+}
+
+// main thread
+bool PickEventFilter::eventFilter(QObject *obj, QEvent *e)
+{
+    switch (e->type()) {
+    case QEvent::MouseButtonPress:
+    case QEvent::MouseButtonRelease:
+    case QEvent::MouseMove:
+        m_pendingEvents.push_back(QMouseEvent(*static_cast<QMouseEvent *>(e)));
+        break;
+    default:
+        break;
+    }
+    return QObject::eventFilter(obj, e);
+}
+
+} // Render
+
+} // Qt3DRender
+
+QT_END_NAMESPACE
diff --git a/src/render/backend/pickeventfilter_p.h b/src/render/backend/pickeventfilter_p.h
new file mode 100644
index 000000000..1c814dc88
--- /dev/null
+++ b/src/render/backend/pickeventfilter_p.h
@@ -0,0 +1,82 @@
+/****************************************************************************
+**
+** Copyright (C) 2015 Paul Lemire paul.lemire350@gmail.com
+** 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 QT3DRENDER_RENDER_PICKEVENTFILTER_H
+#define QT3DRENDER_RENDER_PICKEVENTFILTER_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>
+#include <QMouseEvent>
+
+QT_BEGIN_NAMESPACE
+
+namespace Qt3DRender {
+
+namespace Render {
+
+class PickEventFilter : public QObject
+{
+    Q_OBJECT
+public:
+    explicit PickEventFilter(QObject *parent = Q_NULLPTR);
+    ~PickEventFilter();
+
+    QList<QMouseEvent> pendingEvents();
+
+protected:
+    bool eventFilter(QObject *obj, QEvent *e) Q_DECL_FINAL;
+
+private:
+    QList<QMouseEvent> m_pendingEvents;
+};
+
+} // Render
+
+} // Qt3DRender
+
+QT_END_NAMESPACE
+
+#endif // QT3DRENDER_RENDER_PICKEVENTFILTER_H
diff --git a/src/render/backend/render-backend.pri b/src/render/backend/render-backend.pri
index 8066aa006..a2d0e8395 100644
--- a/src/render/backend/render-backend.pri
+++ b/src/render/backend/render-backend.pri
@@ -22,7 +22,8 @@ HEADERS += \
     $$PWD/layer_p.h \
     $$PWD/nodefunctor_p.h \
     $$PWD/transform_p.h \
-    $$PWD/objectpicker_p.h
+    $$PWD/objectpicker_p.h \
+    $$PWD/pickeventfilter_p.h
 
 SOURCES += \
     $$PWD/renderthread.cpp \
@@ -41,4 +42,5 @@ SOURCES += \
     $$PWD/entity.cpp \
     $$PWD/layer.cpp \
     $$PWD/transform.cpp \
-    $$PWD/objectpicker.cpp
+    $$PWD/objectpicker.cpp \
+    $$PWD/pickeventfilter.cpp