camera.h Example File | Qt Multimedia Widgets 5.4

- Qt 5.4
- Qt Multimedia Widgets
- Camera Example
- camera.h Example File
- Qt 5.4.2 Reference Documentation

# camera.h Example File

camera/camera.h

    /****************************************************************************
    **
    ** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
    ** Contact: http://www.qt-project.org/legal
    **
    ** This file is part of the examples of the Qt Toolkit.
    **
    ** $QT_BEGIN_LICENSE:BSD$
    ** You may use this file under the terms of the BSD license as follows:
    **
    ** "Redistribution and use in source and binary forms, with or without
    ** modification, are permitted provided that the following conditions are
    ** met:
    **   * Redistributions of source code must retain the above copyright
    **     notice, this list of conditions and the following disclaimer.
    **   * Redistributions in binary form must reproduce the above copyright
    **     notice, this list of conditions and the following disclaimer in
    **     the documentation and/or other materials provided with the
    **     distribution.
    **   * Neither the name of Digia Plc and its Subsidiary(-ies) nor the names
    **     of its contributors may be used to endorse or promote products derived
    **     from this software without specific prior written permission.
    **
    **
    ** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
    ** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
    ** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
    ** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
    ** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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    ** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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    ****************************************************************************/

    #ifndef CAMERA_H
    #define CAMERA_H

    #include <QCamera>
    #include <QCameraImageCapture>
    #include <QMediaRecorder>

    #include <QMainWindow>

    namespace Ui { class Camera; }

    class Camera : public QMainWindow
    {
        Q_OBJECT

    public:
        Camera(QWidget *parent = 0);
        ~Camera();

    private slots:
        void setCamera(const QCameraInfo &cameraInfo);

        void startCamera();
        void stopCamera();

        void record();
        void pause();
        void stop();
        void setMuted(bool);

        void toggleLock();
        void takeImage();
        void displayCaptureError(int, QCameraImageCapture::Error, const QString &errorString);

        void configureCaptureSettings();
        void configureVideoSettings();
        void configureImageSettings();

        void displayRecorderError();
        void displayCameraError();

        void updateCameraDevice(QAction *action);

        void updateCameraState(QCamera::State);
        void updateCaptureMode();
        void updateRecorderState(QMediaRecorder::State state);
        void setExposureCompensation(int index);

        void updateRecordTime();

        void processCapturedImage(int requestId, const QImage &img);
        void updateLockStatus(QCamera::LockStatus, QCamera::LockChangeReason);

        void displayViewfinder();
        void displayCapturedImage();

        void readyForCapture(bool ready);
        void imageSaved(int id, const QString &fileName);

    protected:
        void keyPressEvent(QKeyEvent *event);
        void keyReleaseEvent(QKeyEvent *event);
        void closeEvent(QCloseEvent *event);

    private:
        Ui::Camera *ui;

        QCamera *camera;
        QCameraImageCapture *imageCapture;
        QMediaRecorder* mediaRecorder;

        QImageEncoderSettings imageSettings;
        QAudioEncoderSettings audioSettings;
        QVideoEncoderSettings videoSettings;
        QString videoContainerFormat;
        bool isCapturingImage;
        bool applicationExiting;
    };

    #endif