Implement notifications when the available cameras change for macOS

Listen to AVCaptureDeviceWas(Dis)ConnectedNotification notifications
and refresh our video device list if we get one of them.

Change-Id: Idf79e88e06422d74ab61cb82676c4b82fd1fb387
Reviewed-by: Doris Verria <doris.verria@qt.io>
Reviewed-by: Lars Knoll <lars.knoll@qt.io>

1 files changed, 5 insertions, 0 deletions

diff --git a/examples/multimediawidgets/camera/camera.h b/examples/multimediawidgets/camera/camera.h
index bdef8b8f8..d45923cc4 100644
--- a/examples/multimediawidgets/camera/camera.h
+++ b/examples/multimediawidgets/camera/camera.h
@@ -60,6 +60,7 @@
 
 QT_BEGIN_NAMESPACE
 namespace Ui { class Camera; }
+class QActionGroup;
 QT_END_NAMESPACE
 
 class Camera : public QMainWindow
@@ -109,6 +110,8 @@ private slots:
     void readyForCapture(bool ready);
     void imageSaved(int id, const QString &fileName);
 
+    void updateCameras();
+
 protected:
     void keyPressEvent(QKeyEvent *event) override;
     void keyReleaseEvent(QKeyEvent *event) override;
@@ -117,6 +120,8 @@ protected:
 private:
     Ui::Camera *ui;
 
+    QActionGroup *videoDevicesGroup  = nullptr;
+
     QScopedPointer<QCamera> m_camera;
     QCameraImageCapture *m_imageCapture;
     QScopedPointer<QMediaRecorder> m_mediaRecorder;