finished navigation including music player and navigate back

functionality

LenaPi/models/MusicModel.cpp

@@ -0,0 +1,32 @@
+#include "MusicModel.h"
+
+MusicModel::MusicModel(QObject *parent) : QObject(parent)
+{
+
+}
+
+void MusicModel::init(NavigationItemModel *item)
+{
+    mCurrentItem = item;
+    emit currentItemChanged();
+}
+
+void MusicModel::navigateBack()
+{
+    emit navigateTo(mCurrentItem);
+}
+
+void MusicModel::playPause()
+{
+    mIsPlaying = !mIsPlaying;
+}
+
+NavigationItemModel *MusicModel::getCurrentItem()
+{
+    return mCurrentItem;
+}
+
+bool MusicModel::isPlaying()
+{
+    return mIsPlaying;
+}