camerauis/cameraxui/cxengine/inc/cxesnapshotcontrol.h
author Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
Tue, 06 Jul 2010 14:04:02 +0300
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/*
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* Copyright (c) 2010 Nokia Corporation and/or its subsidiary(-ies).
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* All rights reserved.
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* This component and the accompanying materials are made available
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* under the terms of "Eclipse Public License v1.0"
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* which accompanies this distribution, and is available
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* at the URL "http://www.eclipse.org/legal/epl-v10.html".
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*
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* Initial Contributors:
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* Nokia Corporation - initial contribution.
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*
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* Contributors:
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*
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* Description:
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*
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*/
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#ifndef CXESNAPSHOTCONTROL_H
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#define CXESNAPSHOTCONTROL_H
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#include <QObject>
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#include "cxeerror.h"
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#include "cxenamespace.h"
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class CxeCameraDevice;
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class CxeSnapshotControlPrivate;
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/*!
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* Snapshot control class.
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*/
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class CxeSnapshotControl : public QObject
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{
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    Q_OBJECT
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public:
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    // State Machine
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    enum State {
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        //! Idle, snapshot not active.
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        Idle   = 0x01,
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        //! Active, snapshot events provided after successful capture.
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        Active = 0x02
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    };
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    explicit CxeSnapshotControl(CxeCameraDevice &device);
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    virtual ~CxeSnapshotControl();
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public:
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    State state() const;
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    QSize calculateSnapshotSize(const QSize& displaySize, Cxe::AspectRatio aspectRatio) const;
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    void start(const QSize &size);
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    void stop();
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signals:
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    void stateChanged(CxeSnapshotControl::State newState, CxeError::Id status);
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    void snapshotReady(CxeError::Id status, const QImage &snapshot);
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public slots:
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    void handleCameraEvent(int id, int error);
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private:
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    CxeSnapshotControlPrivate *d;
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    Q_DISABLE_COPY(CxeSnapshotControl)
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    friend class CxeSnapshotControlPrivate;
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};
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Q_DECLARE_METATYPE(CxeSnapshotControl::State)
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#endif // CXESNAPSHOTCONTROL_H