Introduce QScreenRayCaster

Split common functionality into abstract base class. Both frontend
classes use the same backend implementation.
Split common pick functionality for the object picking and ray
casting jobs into abstract base class.

Change-Id: Ieb8bdcf65d81db12234841d72c6cb0160e145bf6
Reviewed-by: Sean Harmer <sean.harmer@kdab.com>

1 files changed, 80 insertions, 0 deletions

diff --git a/src/render/picking/qscreenraycaster.h b/src/render/picking/qscreenraycaster.h
new file mode 100644
index 000000000..09ad94374
--- /dev/null
+++ b/src/render/picking/qscreenraycaster.h
@@ -0,0 +1,80 @@
+/****************************************************************************
+**
+** Copyright (C) 2018 Klaralvdalens Datakonsult AB (KDAB).
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of the Qt3D module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** 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 https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://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.LGPL3 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-3.0.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 (at your option) the GNU General
+** Public license version 3 or any later version approved by the KDE Free
+** Qt Foundation. The licenses are as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-2.0.html and
+** https://www.gnu.org/licenses/gpl-3.0.html.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef QT3DRENDER_QSCREENRAYCASTER_H
+#define QT3DRENDER_QSCREENRAYCASTER_H
+
+#include <Qt3DRender/qt3drender_global.h>
+#include <Qt3DRender/QAbstractRayCaster>
+
+#include <QtGui/QVector3D>
+
+QT_BEGIN_NAMESPACE
+
+namespace Qt3DRender {
+
+class QT3DRENDERSHARED_EXPORT QScreenRayCaster : public QAbstractRayCaster
+{
+    Q_OBJECT
+
+    Q_PROPERTY(QPoint position READ position WRITE setPosition NOTIFY positionChanged)
+public:
+    explicit QScreenRayCaster(QNode *parent = nullptr);
+    ~QScreenRayCaster();
+
+    QPoint position() const;
+
+public Q_SLOTS:
+    void setPosition(const QPoint &position);
+
+    void trigger();
+    void trigger(const QPoint &position);
+
+Q_SIGNALS:
+    void positionChanged(const QPoint &position);
+
+protected:
+    explicit QScreenRayCaster(QAbstractRayCasterPrivate &dd, QNode *parent = nullptr);
+};
+
+} // Qt3D
+
+QT_END_NAMESPACE
+
+#endif // QT3DRENDER_QSCREENRAYCASTER_H