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diff --git a/src/graphcoloring/levelselect.hpp b/src/graphcoloring/levelselect.hpp
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+++ b/src/graphcoloring/levelselect.hpp
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+////////////////////////////////////////////////////////////////////////////////
+// Copyright (C) 2018 Leo Tenenbaum
+// This file is part of GraphColoring.
+//
+// GraphColoring is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// GraphColoring is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with GraphColoring.  If not, see <https://www.gnu.org/licenses/>.
+////////////////////////////////////////////////////////////////////////////////
+
+#ifndef GRAPHCOLORING_LEVELSELECT_H_
+#define GRAPHCOLORING_LEVELSELECT_H_
+
+#include <memory>
+
+#include "gui/gui.hpp"
+#include "pugi/pugixml.hpp"
+
+namespace graphcoloring {
+
+class LevelSelect
+{
+public:
+	typedef std::function<void(std::string,std::string)> level_click_callback_t;
+	LevelSelect(gui::Window* window,
+		level_click_callback_t level_click_callback);
+	virtual ~LevelSelect() {}
+	static const char* const LEVEL_LISTING_PATH;
+private:
+	void Scroll(int direction); // -1 for up, +1 for down
+	void ReadCategories();
+	pugi::xml_object_range<pugi::xml_named_node_iterator> GetCategories();
+	void ButtonClicked(std::string category_id, std::string level_id);
+	void MakeLevelButtons();
+	void Render();
+	void RenderCategoryLabels();
+	static constexpr double LEVEL_CIRCLE_RADIUS = 0.06; // As a percentage of min(width, height)
+	static constexpr double LEVEL_CIRCLE_PADDING = 0.03;
+	static constexpr double TEXT_SIZE = 0.06;
+	static constexpr double COMPLETED_SHADE = 0.7; // How much to shade completed levels
+	static constexpr int LEVELS_PER_ROW = 7;
+	gui::Window* const window;
+	pugi::xml_document category_listing;
+	int total_points;
+	std::map<std::string, double> categories_y_positions;
+	level_click_callback_t level_click_callback;
+	std::vector<std::unique_ptr<gui::Button>> buttons;
+	gui::Size min_dimension_both; // min_dimension_both.x,y = min(window width, window height)
+	gui::Size min_dimension_y; // min_dimension_y.x = window width, .y = min(window width, window height)
+	gui::Position scroll_position;
+	int lowest_y; // Lowest y position of bottom of level circle. Used for calculating maximum scroll down.
+};
+
+} // namespace graphcoloring
+
+#endif // GRAPHCOLORING_LEVELSELECT_H_