add property supportedExposureModes to CameraExposure

Task-number: QTBUG-45336
Change-Id: I9b4f3271f7f56b88f2484f56dd1d37e2e97f5118
Reviewed-by: Christian Stromme <christian.stromme@qt.io>

3 files changed, 34 insertions, 0 deletions

diff --git a/src/imports/multimedia/multimedia.cpp b/src/imports/multimedia/multimedia.cpp
index 96994b9bf..28829adfb 100644
--- a/src/imports/multimedia/multimedia.cpp
+++ b/src/imports/multimedia/multimedia.cpp
@@ -156,6 +156,8 @@ public:
         qmlRegisterType<QDeclarativeAudio, 3>(uri, 5, 11, "MediaPlayer");
         qmlRegisterUncreatableType<QDeclarativeCameraFocus, 1>(uri, 5, 11, "CameraFocus",
                                 trUtf8("CameraFocus is provided by Camera"));
+        qmlRegisterUncreatableType<QDeclarativeCameraExposure, 1>(uri, 5, 11, "CameraExposure",
+                                trUtf8("CameraExposure is provided by Camera"));
 
         qmlRegisterType<QDeclarativeMediaMetaData>();
         qmlRegisterType<QAbstractVideoFilter>();
diff --git a/src/imports/multimedia/qdeclarativecameraexposure.cpp b/src/imports/multimedia/qdeclarativecameraexposure.cpp
index 92972e512..af8c6acf6 100644
--- a/src/imports/multimedia/qdeclarativecameraexposure.cpp
+++ b/src/imports/multimedia/qdeclarativecameraexposure.cpp
@@ -107,6 +107,14 @@ QDeclarativeCameraExposure::QDeclarativeCameraExposure(QCamera *camera, QObject
     connect(m_exposure, SIGNAL(shutterSpeedChanged(qreal)), this, SIGNAL(shutterSpeedChanged(qreal)));
 
     connect(m_exposure, SIGNAL(exposureCompensationChanged(qreal)), this, SIGNAL(exposureCompensationChanged(qreal)));
+    connect(camera, &QCamera::statusChanged, [this](QCamera::Status status) {
+        if (status != QCamera::UnloadedStatus && status != QCamera::LoadedStatus
+            && status != QCamera::ActiveStatus) {
+            return;
+        }
+
+        emit supportedExposureModesChanged();
+    });
 }
 
 QDeclarativeCameraExposure::~QDeclarativeCameraExposure()
@@ -369,6 +377,27 @@ void QDeclarativeCameraExposure::setExposureMode(QDeclarativeCameraExposure::Exp
         emit exposureModeChanged(exposureMode());
     }
 }
+
+/*!
+    \qmlproperty list<ExposureMode> QtMultimedia::CameraExposure::supportedExposureModes
+
+    This property holds the supported exposure modes of the camera.
+
+    \since 5.11
+    \sa exposureMode
+ */
+QVariantList QDeclarativeCameraExposure::supportedExposureModes() const
+{
+    QVariantList supportedModes;
+
+    for (int i = int(ExposureAuto); i <= int(QCameraExposure::ExposureBarcode); ++i) {
+        if (m_exposure->isExposureModeSupported((QCameraExposure::ExposureMode) i))
+            supportedModes.append(QVariant(i));
+    }
+
+    return supportedModes;
+}
+
 /*!
     \property QDeclarativeCameraExposure::spotMeteringPoint
 
diff --git a/src/imports/multimedia/qdeclarativecameraexposure_p.h b/src/imports/multimedia/qdeclarativecameraexposure_p.h
index 806cb775e..ef99b1ce9 100644
--- a/src/imports/multimedia/qdeclarativecameraexposure_p.h
+++ b/src/imports/multimedia/qdeclarativecameraexposure_p.h
@@ -73,6 +73,7 @@ class QDeclarativeCameraExposure : public QObject
     Q_PROPERTY(qreal manualIso READ manualIsoSensitivity WRITE setManualIsoSensitivity NOTIFY manualIsoSensitivityChanged)
 
     Q_PROPERTY(ExposureMode exposureMode READ exposureMode WRITE setExposureMode NOTIFY exposureModeChanged)
+    Q_PROPERTY(QVariantList supportedExposureModes READ supportedExposureModes NOTIFY supportedExposureModesChanged REVISION 1)
 
     Q_PROPERTY(QPointF spotMeteringPoint READ spotMeteringPoint WRITE setSpotMeteringPoint NOTIFY spotMeteringPointChanged)
     Q_PROPERTY(MeteringMode meteringMode READ meteringMode WRITE setMeteringMode NOTIFY meteringModeChanged)
@@ -114,6 +115,7 @@ public:
     ~QDeclarativeCameraExposure();
 
     ExposureMode exposureMode() const;
+    QVariantList supportedExposureModes() const;
     qreal exposureCompensation() const;
 
     int isoSensitivity() const;
@@ -153,6 +155,7 @@ Q_SIGNALS:
 
     void exposureCompensationChanged(qreal);
     void exposureModeChanged(ExposureMode);
+    void supportedExposureModesChanged();
 
     void meteringModeChanged(MeteringMode);
     void spotMeteringPointChanged(QPointF);