Implement icon picker, bring back raster icons.

backend/IconListModel.h

@@ -0,0 +1,33 @@
+#pragma once
+
+#include <QMutex>
+#include <QAbstractListModel>
+#include <QtGui/QIcon>
+
+class Private;
+
+class IconList : public QAbstractListModel
+{
+public:
+	static IconList* instance();
+	static void drop();
+	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, bool is_builtin = false);
+	
+	
+private:
+	virtual ~IconList();
+	IconList();
+	// hide copy constructor
+	IconList ( const IconList & ) = delete;
+	// hide assign op
+	IconList& operator= ( const IconList & ) = delete;
+	static IconList* m_Instance;
+	static QMutex mutex;
+	Private* d;
+};