Implement event model in C++

Filtering events in JS is too slow with >20,000 events. This moves the
event data model into C++.

1 files changed, 46 insertions, 0 deletions

diff --git a/event_list.h b/event_list.h
new file mode 100644
index 0000000..1c50c59
--- /dev/null
+++ b/event_list.h
@@ -0,0 +1,46 @@
+#ifndef EVENT_LIST_H
+#define EVENT_LIST_H
+
+#include <QAbstractListModel>
+#include <QJsonObject>
+#include <QStringList>
+#include <qqml.h>
+
+class EventList : public QAbstractListModel
+{
+	Q_OBJECT
+	Q_PROPERTY(QStringList tagsOrder MEMBER tagsOrder NOTIFY tagsChanged)
+	Q_PROPERTY(QJsonObject tags MEMBER tags NOTIFY tagsChanged)
+	QML_ELEMENT
+public:
+	Qt::ItemFlags flags(const QModelIndex& index) const;
+	QHash<int, QByteArray> roleNames() const;
+	int rowCount(const QModelIndex& parent = {}) const;
+	QVariant data(const QModelIndex& index, int role = Qt::DisplayRole) const;
+	bool setData(const QModelIndex& index, const QVariant& value, int role);
+
+public slots:
+	int insert(const int time = -1);
+	bool removeRows(int row, int count = 1, const QModelIndex &parent = {});
+	void load(const QJsonObject& json);
+	QJsonObject save() const;
+
+signals:
+	void tagsChanged();
+
+private:
+	struct Event {
+		long long time;
+		QString tag{};
+		QVariantMap values{};
+	};
+	enum Role { Time = Qt::UserRole + 1, Tag, Values };
+
+	QStringList tagsOrder;
+	QJsonObject tags;
+	QList<Event> events;
+
+	int find(long long time) const;
+};
+
+#endif