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diff --git a/api/logic/minecraft/WorldList.h b/api/logic/minecraft/WorldList.h
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+/* Copyright 2015 MultiMC Contributors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#pragma once
+
+#include <QList>
+#include <QString>
+#include <QDir>
+#include <QAbstractListModel>
+#include <QMimeData>
+#include "minecraft/World.h"
+
+#include "multimc_logic_export.h"
+
+class QFileSystemWatcher;
+
+class MULTIMC_LOGIC_EXPORT WorldList : public QAbstractListModel
+{
+	Q_OBJECT
+public:
+	enum Columns
+	{
+		NameColumn,
+		LastPlayedColumn
+	};
+
+	enum Roles
+	{
+		ObjectRole = Qt::UserRole + 1,
+		FolderRole,
+		SeedRole,
+		NameRole,
+		LastPlayedRole
+	};
+
+	WorldList(const QString &dir);
+
+	virtual QVariant data(const QModelIndex &index, int role = Qt::DisplayRole) const;
+
+	virtual int rowCount(const QModelIndex &parent = QModelIndex()) const
+	{
+		return size();
+	};
+	virtual QVariant headerData(int section, Qt::Orientation orientation,
+								int role = Qt::DisplayRole) const;
+	virtual int columnCount(const QModelIndex &parent) const;
+
+	size_t size() const
+	{
+		return worlds.size();
+	};
+	bool empty() const
+	{
+		return size() == 0;
+	}
+	World &operator[](size_t index)
+	{
+		return worlds[index];
+	}
+
+	/// Reloads the mod list and returns true if the list changed.
+	virtual bool update();
+
+	/// Install a world from location
+	void installWorld(QFileInfo filename);
+
+	/// Deletes the mod at the given index.
+	virtual bool deleteWorld(int index);
+
+	/// Deletes all the selected mods
+	virtual bool deleteWorlds(int first, int last);
+
+	/// flags, mostly to support drag&drop
+	virtual Qt::ItemFlags flags(const QModelIndex &index) const;
+	/// get data for drag action
+	virtual QMimeData *mimeData(const QModelIndexList &indexes) const;
+	/// get the supported mime types
+	virtual QStringList mimeTypes() const;
+	/// process data from drop action
+	virtual bool dropMimeData(const QMimeData *data, Qt::DropAction action, int row, int column, const QModelIndex &parent);
+	/// what drag actions do we support?
+	virtual Qt::DropActions supportedDragActions() const;
+
+	/// what drop actions do we support?
+	virtual Qt::DropActions supportedDropActions() const;
+
+	void startWatching();
+	void stopWatching();
+
+	virtual bool isValid();
+
+	QDir dir() const
+	{
+		return m_dir;
+	}
+
+	const QList<World> &allWorlds() const
+	{
+		return worlds;
+	}
+
+private slots:
+	void directoryChanged(QString path);
+
+signals:
+	void changed();
+
+protected:
+	QFileSystemWatcher *m_watcher;
+	bool is_watching;
+	QDir m_dir;
+	QList<World> worlds;
+};