setup electron app with boilerplate

cpp/src/particlelistmodel.h

@@ -0,0 +1,26 @@
+#ifndef PARTICLELISTMODEL_H
+#define PARTICLELISTMODEL_H
+
+#include <QAbstractListModel>
+#include "store.h"
+
+class ParticleListModel : public QAbstractListModel
+{
+  Q_OBJECT
+
+public:
+  explicit ParticleListModel(Store *store, QObject *parent = nullptr);
+
+  int rowCount(const QModelIndex &parent = QModelIndex()) const override;
+  QVariant data(const QModelIndex &index, int role = Qt::DisplayRole) const override;
+
+  void setStreamId(const QString &streamId);
+  int firstUnseenRow() const;  // Returns -1 if none unseen
+  const Particle* particleAtRow(int row) const;
+
+private:
+  Store *m_store;
+  QString m_currentStreamId;
+};
+
+#endif // PARTICLELISTMODEL_H