Add a simple Torch class that wraps the camera flash.

Since nearly all programmable torch hardware doubles as camera flash
hardware, offer this class here that wraps the QCameraFlashControl.

Change-Id: Ib2c061c21c14221d67477d8a3fd89a76fc26ed71
Reviewed-by: Jonas Rabbe <jonas.rabbe@nokia.com>

src/imports/multimedia/qdeclarativetorch_p.h

@@ -0,0 +1,93 @@
+/****************************************************************************
+**
+** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** GNU Lesser General Public License Usage
+** This file may be used under the terms of the GNU Lesser General Public
+** License version 2.1 as published by the Free Software Foundation and
+** appearing in the file LICENSE.LGPL included in the packaging of this
+** file. Please review the following information to ensure the GNU Lesser
+** General Public License version 2.1 requirements will be met:
+** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain additional
+** rights. These rights are described in the Nokia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU General
+** Public License version 3.0 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 3.0 requirements will be met:
+** http://www.gnu.org/copyleft/gpl.html.
+**
+** Other Usage
+** Alternatively, this file may be used in accordance with the terms and
+** conditions contained in a signed written agreement between you and Nokia.
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+
+#ifndef QDECLARATIVETORCH_P_H
+#define QDECLARATIVETORCH_P_H
+
+#include <QObject>
+#include <QtDeclarative/qdeclarative.h>
+#include <qcamera.h>
+#include <qcameraexposurecontrol.h>
+#include <qcameraflashcontrol.h>
+
+QT_BEGIN_HEADER
+
+QT_BEGIN_NAMESPACE
+
+class QDeclarativeTorch : public QObject
+{
+    Q_OBJECT
+    Q_PROPERTY(bool enabled READ enabled WRITE setEnabled NOTIFY enabledChanged)
+    Q_PROPERTY(int power READ power WRITE setPower NOTIFY powerChanged)
+
+    // Errors?
+
+public:
+    explicit QDeclarativeTorch(QObject *parent = 0);
+    ~QDeclarativeTorch();
+
+    bool enabled() const;
+    void setEnabled(bool enabled);
+
+    int power() const;
+    void setPower(int power);
+
+signals:
+    void enabledChanged();
+    void powerChanged();
+
+private slots:
+    void parameterChanged(int parameter);
+
+private:
+    QCamera *m_camera;
+    QCameraExposureControl *m_exposure;
+    QCameraFlashControl *m_flash;
+};
+
+QT_END_NAMESPACE
+
+QML_DECLARE_TYPE(QT_PREPEND_NAMESPACE(QDeclarativeTorch))
+
+QT_END_HEADER
+
+#endif // QDECLARATIVETORCH_P_H