[ #48205 ] Add device configuration widget skeleton

src/videodevicemodel.cpp

@@ -67,7 +67,8 @@ bool VideoDeviceModel::setData(const QModelIndex& idx, const QVariant &value, in
 
 ///Constructor
 VideoDeviceModel::VideoDeviceModel() : QAbstractListModel(QCoreApplication::instance()),
-m_pResolutionModel(nullptr),m_pChannelModel(nullptr),m_pRateModel(nullptr)
+m_pResolutionModel(nullptr),m_pChannelModel(nullptr),m_pRateModel(nullptr),
+m_pDummyDevice(nullptr)
 {
    connect(this             ,SIGNAL(changed()) , channelModel   () , SLOT(reload()));
    connect(channelModel()   ,SIGNAL(changed()) , resolutionModel() , SLOT(reload()));
@@ -155,7 +156,18 @@ VideoDevice* VideoDeviceModel::activeDevice() const
    const QString deId = interface.getActiveDevice();
    if (!m_lDevices.size())
       const_cast<VideoDeviceModel*>(this)->reload();
-   return m_hDevices[deId];
+   VideoDevice* dev =  m_hDevices[deId];
+
+   //Handling null everywhere is too long, better create a dummy device and
+   //log the event
+   if (!dev) {
+      if (!deId.isEmpty())
+         qWarning() << "Requested unknown device" << deId;
+      if (!m_pDummyDevice)
+         const_cast<VideoDeviceModel*>(this)->m_pDummyDevice = new VideoDevice("None");
+      return m_pDummyDevice;
+   }
+   return dev;
 }
 
 

src/videodevicemodel.h

@@ -112,6 +112,12 @@ Q_DECLARE_METATYPE(VideoDeviceChannelModel*)
 class LIB_EXPORT ExtendedVideoDeviceModel : public QAbstractListModel {
    Q_OBJECT
 public:
+   enum ExtendedDeviceList {
+      NONE   ,
+      SCREEN ,
+      FILE   ,
+      __COUNT
+   };
    QVariant      data     ( const QModelIndex& index, int role = Qt::DisplayRole     ) const;
    int           rowCount ( const QModelIndex& parent = QModelIndex()                ) const;
    Qt::ItemFlags flags    ( const QModelIndex& index                                 ) const;
@@ -120,12 +126,6 @@ public:
    //Singleton
    static ExtendedVideoDeviceModel* instance();
 private:
-   enum ExtendedDeviceList {
-      NONE   ,
-      SCREEN ,
-      FILE   ,
-      __COUNT
-   };
    struct Display {
       Display() : res("0x0"),point(0,0),index(0){}
       Resolution res ; /* Resolution 0x0 for native */
@@ -215,6 +215,7 @@ private:
    VideoDeviceResolutionModel* m_pResolutionModel;
    VideoDeviceChannelModel*    m_pChannelModel   ;
    VideoDeviceRateModel*       m_pRateModel      ;
+   VideoDevice*                m_pDummyDevice    ;
 
 public Q_SLOTS:
    void setActive(const QModelIndex& idx);