Refactor icon lists heavily

* Icon list now uses a filesystem watcher for updates
* Icon folder is user-customizable
* All the little details. ALL OF THEM.

logic/icons/IconList.h

@@ -0,0 +1,77 @@
+/* Copyright 2013 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 <QMutex>
+#include <QAbstractListModel>
+#include <QFile>
+#include <QDir>
+#include <QtGui/QIcon>
+#include <memory>
+#include "MMCIcon.h"
+#include "setting.h"
+
+class QFileSystemWatcher;
+
+class IconList : public QAbstractListModel
+{
+	Q_OBJECT
+public:
+	explicit IconList(QObject *parent = 0);
+	virtual ~IconList() {};
+
+	QIcon getIcon(QString key);
+	int getIconIndex(QString key);
+
+	virtual QVariant data(const QModelIndex &index, int role = Qt::DisplayRole) const;
+	virtual int rowCount(const QModelIndex &parent = QModelIndex()) const;
+
+	bool addIcon(QString key, QString name, QString path, MMCIcon::Type type);
+	bool deleteIcon(QString key);
+
+	virtual QStringList mimeTypes() const;
+	virtual Qt::DropActions supportedDropActions() const;
+	virtual bool dropMimeData(const QMimeData *data, Qt::DropAction action, int row, int column,
+							  const QModelIndex &parent);
+	virtual Qt::ItemFlags flags(const QModelIndex &index) const;
+
+	void installIcons(QStringList iconFiles);
+
+	void startWatching();
+	void stopWatching();
+
+signals:
+	void iconUpdated(QString key);
+
+private:
+	// hide copy constructor
+	IconList(const IconList &) = delete;
+	// hide assign op
+	IconList &operator=(const IconList &) = delete;
+	void reindex();
+
+protected
+slots:
+	void directoryChanged(const QString &path);
+	void fileChanged(const QString &path);
+	void settingChanged(const Setting & setting, QVariant value);
+private:
+	std::shared_ptr<QFileSystemWatcher> m_watcher;
+	bool is_watching;
+	QMap<QString, int> name_index;
+	QVector<MMCIcon> icons;
+	QDir m_dir;
+};