finished navigation including music player and navigate back

functionality

LenaPi/models/UiStateModel.h

@@ -0,0 +1,28 @@
+#ifndef UISTATEMODEL_H
+#define UISTATEMODEL_H
+
+#include <QObject>
+#include <QUrl>
+
+class UiStateModel : public QObject
+{
+    Q_OBJECT
+
+    Q_PROPERTY(QUrl pSource READ getSource NOTIFY sourceChanged)
+
+signals:
+    void sourceChanged();
+
+public:
+    UiStateModel(QObject *parent = Q_NULLPTR);
+
+    QUrl getSource() const;
+
+    void showMusicPlayer();
+    void showNavigation();
+
+private:
+    QUrl mSource;
+};
+
+#endif // UISTATEMODEL_H