crown-engine/tools/level_editor/level_editor.vala

/*
 * Copyright (c) 2012-2018 Daniele Bartolini and individual contributors.
 * License: https://github.com/dbartolini/crown/blob/master/LICENSE
 */

using Gdk; // Pixbuf
using Gee;
using Gtk;

namespace Crown
{
	public enum ToolType
	{
		PLACE,
		MOVE,
		ROTATE,
		SCALE
	}

	public enum SnapMode
	{
		RELATIVE,
		ABSOLUTE
	}

	public enum ReferenceSystem
	{
		LOCAL,
		WORLD
	}

	public enum StartGame
	{
		NORMAL,
		TEST
	}

	public class LevelEditor : Gtk.Window
	{
		// Constants
		const Gtk.ActionEntry[] action_entries =
		{
			{ "menu-file",               null,       "_File",               null,             null,         null                       },
			{ "new-level",               null,       "New Level",           "<ctrl>N",        null,         on_new_level               },
			{ "open-level",              null,       "Open Level...",       "<ctrl>O",        null,         on_open_level              },
			{ "open-project",            null,       "Open Project...",     null,             null,         on_open_project            },
			{ "save",                    null,       "Save",                "<ctrl>S",        null,         on_save                    },
			{ "save-as",                 null,       "Save As...",          "<shift><ctrl>S", null,         on_save_as                 },
			{ "import",                  null,       "Import",              null,             null,         null                       },
			{ "import-sprites",          null,       "Sprites...",          null,             null,         on_import_sprites          },
			{ "import-meshes",           null,       "Meshes...",           null,             null,         on_import_meshes           },
			{ "import-sounds",           null,       "Sounds...",           null,             null,         on_import_sounds           },
			{ "import-textures",         null,       "Textures...",         null,             null,         on_import_textures         },
			{ "preferences",             null,       "Preferences",         null,             null,         on_preferences             },
			{ "deploy",                  null,       "Deploy...",           null,             null,         on_deploy                  },
			{ "quit",                    null,       "Quit",                "<ctrl>Q",        null,         on_quit                    },
			{ "menu-edit",               null,       "_Edit",               null,             null,         null                       },
			{ "undo",                    null,       "Undo",                "<ctrl>Z",        null,         on_undo                    },
			{ "redo",                    null,       "Redo",                "<shift><ctrl>Z", null,         on_redo                    },
			{ "duplicate",               null,       "Duplicate",           "<ctrl>D",        null,         on_duplicate               },
			{ "delete",                  null,       "Delete",              "<ctrl>K",        null,         on_delete                  },
			{ "menu-grid",               null,       "Grid",                null,             null,         null                       },
			{ "grid-custom",             null,       "Custom",              "<ctrl>G",        null,         on_custom_grid             },
			{ "menu-rotation-snap",      null,       "Rotation Snap",       null,             null,         null                       },
			{ "rotation-snap-custom",    null,       "Custom",              "<ctrl>H",        null,         on_rotation_snap           },
			{ "menu-create",             null,       "Create",              null,             null,         null                       },
			{ "menu-primitives",         null,       "Primitives",          null,             null,         null                       },
			{ "primitive-cube",          null,       "Cube",                null,             null,         on_create_primitive        },
			{ "primitive-sphere",        null,       "Sphere",              null,             null,         on_create_primitive        },
			{ "primitive-cone",          null,       "Cone",                null,             null,         on_create_primitive        },
			{ "primitive-cylinder",      null,       "Cylinder",            null,             null,         on_create_primitive        },
			{ "primitive-plane",         null,       "Plane",               null,             null,         on_create_primitive        },
			{ "camera",                  null,       "Camera",              null,             null,         on_create_primitive        },
			{ "light",                   null,       "Light",               null,             null,         on_create_primitive        },
			{ "sound-source",            null,       "Sound Source",        null,             null,         on_create_primitive        },
			{ "menu-camera",             null,       "Camera",              null,             null,         null                       },
			{ "camera-view-perspective", null,       "Perspective",         "KP_5",           null,         on_camera_view             },
			{ "camera-view-front",       null,       "View Front",          "KP_1",           null,         on_camera_view             },
			{ "camera-view-back",        null,       "View Back",           "<ctrl>KP_1",     null,         on_camera_view             },
			{ "camera-view-right",       null,       "View Right",          "KP_3",           null,         on_camera_view             },
			{ "camera-view-left",        null,       "View Left",           "<ctrl>KP_3",     null,         on_camera_view             },
			{ "camera-view-top",         null,       "View Top",            "KP_7",           null,         on_camera_view             },
			{ "camera-view-bottom",      null,       "View Bottom",         "<ctrl>KP_7",     null,         on_camera_view             },
			{ "menu-engine",             null,       "En_gine",             null,             null,         null                       },
			{ "menu-view",               null,       "View",                null,             null,         null                       },
			{ "resource-browser",        null,       "Resource Browser",    "<ctrl>P",        null,         on_resource_browser        },
			{ "fullscreen",              null,       "Fullscreen",          "F11",            null,         on_fullscreen              },
			{ "restart",                 null,       "_Restart",            null,             null,         on_engine_restart          },
			{ "reload-lua",              null,       "Reload Level Editor", "F7",             null,         on_reload_lua              },
			{ "menu-run",                null,       "_Run",                null,             null,         null                       },
			{ "test-level",              "game-run", "Test Level",          "F5",             "Test Level", on_run_game                },
			{ "run-game",                null,       "Run Game",            null,             null,         on_run_game                },
			{ "menu-help",               null,       "Help",                null,             null,         null                       },
			{ "manual",                  null,       "Manual",              "F1",             null,         on_manual                  },
			{ "report-issue",            null,       "Report an Issue",     null,             null,         on_report_issue            },
			{ "open-last-log",           null,       "Open last.log",       null,             null,         on_open_last_log           },
			{ "about",                   null,       "About",               null,             null,         on_about                   }
		};

		const Gtk.RadioActionEntry[] grid_entries =
		{
			{ "grid-0.1", null, "0.1m", null, null, 10  },
			{ "grid-0.2", null, "0.2m", null, null, 20  },
			{ "grid-0.5", null, "0.5m", null, null, 50  },
			{ "grid-1",   null, "1m",   null, null, 100 },
			{ "grid-2",   null, "2m",   null, null, 200 },
			{ "grid-5",   null, "5m",   null, null, 500 }
		};

		const Gtk.RadioActionEntry[] rotation_snap_entries =
		{
			{ "rotation-snap-1",   null, "1°",   null, null,   1 },
			{ "rotation-snap-15",  null, "15°",  null, null,  15 },
			{ "rotation-snap-30",  null, "30°",  null, null,  30 },
			{ "rotation-snap-45",  null, "45°",  null, null,  45 },
			{ "rotation-snap-90",  null, "90°",  null, null,  90 },
			{ "rotation-snap-180", null, "180°", null, null, 180 }
		};

		const Gtk.RadioActionEntry[] tool_entries =
		{
			{ "place",  "tool-place",  "Place",  null, "Place",  (int)ToolType.PLACE  },
			{ "move",   "tool-move",   "Move",   null, "Move",   (int)ToolType.MOVE   },
			{ "rotate", "tool-rotate", "Rotate", null, "Rotate", (int)ToolType.ROTATE },
			{ "scale",  "tool-scale",  "Scale",  null, "Scale",  (int)ToolType.SCALE  }
		};

		const Gtk.RadioActionEntry[] snap_mode_entries =
		{
			{ "snap-relative", "reference-local", "Relative Snap", null, "Relative Snap", (int)SnapMode.RELATIVE },
			{ "snap-absolute", "reference-world", "Absolute Snap", null, "Absolute Snap", (int)SnapMode.ABSOLUTE }
		};

		const Gtk.RadioActionEntry[] reference_system_entries =
		{
			{ "reference-system-local", "axis-local", "Local Axis", null, "Local Axis", (int)ReferenceSystem.LOCAL },
			{ "reference-system-world", "axis-world", "World Axis", null, "World Axis", (int)ReferenceSystem.WORLD }
		};

		const Gtk.ToggleActionEntry[] snap_to_entries =
		{
			{ "snap-to-grid", "snap-to-grid", "Snap To Grid", "<ctrl>U", "Snap To Grid", on_snap_to_grid, true },
			{ "grid-show",     null,          "Show Grid",    null,      "Show Grid",    on_show_grid,    true }
		};

		const Gtk.ToggleActionEntry[] view_entries =
		{
			{ "debug-render-world",  null, "Debug Render World",  null, null, on_debug_render_world,  false },
			{ "debug-physics-world", null, "Debug Physics World", null, null, on_debug_physics_world, false }
		};

		// Editor state
		private double _grid_size;
		private double _rotation_snap;
		private bool _show_grid;
		private bool _snap_to_grid;
		private bool _debug_render_world;
		private bool _debug_physics_world;
		private ToolType _tool_type;
		private SnapMode _snap_mode;
		private ReferenceSystem _reference_system;

		// Engine connections
		private GLib.Subprocess _compiler_process;
		private GLib.Subprocess _engine_process;
		private GLib.Subprocess _game_process;
		private ConsoleClient _compiler;
		private ConsoleClient _engine;
		private ConsoleClient _game;

		// Level data
		private Database _database;
		private Project _project;
		private ProjectStore _project_store;
		private Level _level;
		private DataCompiler _data_compiler;

		// Widgets
		private ConsoleView _console_view;
		private EngineView _engine_view;
		private LevelTreeView _level_treeview;
		private LevelLayersTreeView _level_layers_treeview;
		private PropertiesView _properties_view;
		private PreferencesDialog _preferences_dialog;
		private ResourceBrowser _resource_browser;
		private ResourceBrowser _resource_selection;
		private Gtk.Popover _resource_popover;
		private Gtk.Overlay _engine_view_overlay;
		private Slide _engine_slide;
		private Slide _inspector_slide;

		private Gtk.ActionGroup _action_group;
		private Gtk.UIManager _ui_manager;
		private Gtk.MenuBar _menubar;
		private Gtk.Toolbar _toolbar;
		private Gtk.Paned _engine_pane;
		private Gtk.Notebook _level_tree_view_notebook;
		private Gtk.Paned _inspector_pane;
		private Gtk.Paned _main_pane;
		private Gtk.Box _main_vbox;
		private Gtk.FileFilter _file_filter;

		private bool _fullscreen;

		public LevelEditor(Database database, Project project, Level level, ConsoleClient compiler, ConsoleClient engine, ConsoleClient game)
		{
			this.title = "Level Editor";

			// Editor state
			_grid_size = 1.0;
			_rotation_snap = 15.0;
			_show_grid = true;
			_snap_to_grid = true;
			_debug_render_world = false;
			_debug_physics_world = false;
			_tool_type = ToolType.MOVE;
			_snap_mode = SnapMode.RELATIVE;
			_reference_system = ReferenceSystem.LOCAL;

			// Engine connections
			_compiler_process = null;
			_engine_process = null;
			_game_process = null;
			_compiler = compiler;
			_compiler.connected.connect(on_compiler_connected);
			_compiler.disconnected.connect(on_compiler_disconnected);
			_compiler.message_received.connect(on_message_received);
			_engine = engine;
			_engine.connected.connect(on_engine_connected);
			_engine.disconnected.connect(on_engine_disconnected);
			_engine.message_received.connect(on_message_received);
			_game = game;
			_game.connected.connect(on_game_connected);
			_game.disconnected.connect(on_game_disconnected);
			_game.message_received.connect(on_message_received);

			_data_compiler = new DataCompiler(_compiler);
			_database = database;
			_project = project;
			_project_store = new ProjectStore(_project);
			_level = level;

			// Widgets
			_resource_browser = new ResourceBrowser(_project, _project_store, true);
			_resource_browser.resource_selected.connect(on_resource_browser_resource_selected);

			_resource_selection = new ResourceBrowser(_project, _project_store, false);

			_console_view = new ConsoleView(_engine, _project);
			_level_treeview = new LevelTreeView(_database, _level);
			_level_layers_treeview = new LevelLayersTreeView(_database, _level);
			_properties_view = new PropertiesView(_level, _project_store);

			_engine_slide = new Slide();
			_engine_slide.show_widget(new StartingCompiler());
			_inspector_slide = new Slide();
			_inspector_slide.show_widget(new StartingCompiler());

			_action_group = new Gtk.ActionGroup("group");
			_action_group.add_actions(action_entries, this);
			_action_group.add_radio_actions(grid_entries, (int)(_grid_size*100.0), this.on_grid_changed);
			_action_group.add_radio_actions(rotation_snap_entries, (int)_rotation_snap, this.on_rotation_snap_changed);
			_action_group.add_radio_actions(tool_entries, (int)_tool_type, on_tool_changed);
			_action_group.add_radio_actions(snap_mode_entries, (int)_snap_mode, on_snap_mode_changed);
			_action_group.add_radio_actions(reference_system_entries, (int)_reference_system, on_reference_system_changed);
			_action_group.add_toggle_actions(snap_to_entries, this);
			_action_group.add_toggle_actions(view_entries, this);

			_ui_manager = new UIManager();
			try
			{
				_ui_manager.add_ui_from_resource("/org/crown/level_editor/level_editor.xml");
				_ui_manager.insert_action_group(_action_group, 0);
				add_accel_group(_ui_manager.get_accel_group());
			}
			catch (Error e)
			{
				error(e.message);
			}

			_menubar = _ui_manager.get_widget("/menubar") as Gtk.MenuBar;
			_toolbar = _ui_manager.get_widget("/toolbar") as Gtk.Toolbar;
			_toolbar.set_icon_size(Gtk.IconSize.SMALL_TOOLBAR);
			_toolbar.set_style(Gtk.ToolbarStyle.ICONS);
			_toolbar.halign = Gtk.Align.START;
			_toolbar.valign = Gtk.Align.START;
			_toolbar.orientation = Gtk.Orientation.VERTICAL;
			_toolbar.margin_start = 6;
			_toolbar.margin_top = 6;

			_resource_popover = new Gtk.Popover(_toolbar);
			_resource_popover.delete_event.connect(() => { _resource_popover.hide(); return true; });
			_resource_popover.modal = true;
			_resource_browser.resource_selected.connect(() => { _resource_popover.hide(); });
			_resource_popover.add(_resource_browser);

			_level_tree_view_notebook = new Notebook();
			_level_tree_view_notebook.show_border = false;
			_level_tree_view_notebook.append_page(_level_treeview, new Gtk.Image.from_icon_name("level-tree", IconSize.SMALL_TOOLBAR));
			_level_tree_view_notebook.append_page(_level_layers_treeview, new Gtk.Image.from_icon_name("level-layers", IconSize.SMALL_TOOLBAR));

			_engine_view_overlay = new Gtk.Overlay();

			_engine_pane = new Gtk.Paned(Gtk.Orientation.VERTICAL);
			_engine_pane.pack1(_engine_slide, true, true);
			_engine_pane.pack2(_console_view, true, true);

			_inspector_pane = new Gtk.Paned(Gtk.Orientation.VERTICAL);
			_inspector_pane.pack1(_level_tree_view_notebook, true, true);
			_inspector_pane.pack2(_properties_view, true, true);

			_main_pane = new Gtk.Paned(Gtk.Orientation.HORIZONTAL);
			_main_pane.pack1(_engine_pane, true, false);
			_main_pane.pack2(_inspector_slide, true, false);

			_main_vbox = new Gtk.Box(Gtk.Orientation.VERTICAL, 0);
			_main_vbox.pack_start(_menubar, false, false, 0);
			_main_vbox.pack_start(_main_pane, true, true, 0);

			_file_filter = new FileFilter();
			_file_filter.set_filter_name("Level (*.level)");
			_file_filter.add_pattern("*.level");

			// Save level once every 5 minutes.
			GLib.Timeout.add_seconds(5*3600, save_timeout);

			_fullscreen = false;

			this.destroy.connect(this.on_destroy);
			this.delete_event.connect(this.on_delete_event);
			this.key_press_event.connect(this.on_key_press);
			this.key_release_event.connect(this.on_key_release);
			this.window_state_event.connect(this.on_window_state_event);

			this.add(_main_vbox);
			this.maximize();
			this.show_all();

			start_compiler();

			// This is supposed to work in pixel units but it doesn't for
			// a reason I couldn't find. The values passed, though, seem
			// to move pane handles to the correct-ish position.
			_main_pane.set_position(300);
			_engine_pane.set_position(72);
			_inspector_pane.set_position(300);
		}

		private bool on_key_press(Gdk.EventKey ev)
		{
			if (ev.keyval == Gdk.Key.Control_L)
				_engine.send_script(LevelEditorApi.key_down("ctrl_left"));
			else if (ev.keyval == Gdk.Key.Shift_L)
				_engine.send_script(LevelEditorApi.key_down("shift_left"));
			else if (ev.keyval == Gdk.Key.Alt_L)
				_engine.send_script(LevelEditorApi.key_down("alt_left"));

			return false;
		}

		private bool on_key_release(Gdk.EventKey ev)
		{
			if (ev.keyval == Gdk.Key.Control_L)
				_engine.send_script(LevelEditorApi.key_up("ctrl_left"));
			else if (ev.keyval == Gdk.Key.Shift_L)
				_engine.send_script(LevelEditorApi.key_up("shift_left"));
			else if (ev.keyval == Gdk.Key.Alt_L)
				_engine.send_script(LevelEditorApi.key_up("alt_left"));

			return false;
		}

		private bool on_window_state_event(EventWindowState ev)
		{
			_fullscreen = (ev.new_window_state & WindowState.FULLSCREEN) != 0;
			return true;
		}

		private void on_resource_browser_resource_selected(string type, string name)
		{
			_engine.send_script(LevelEditorApi.set_placeable(type, name));
			_action_group.get_action("place").activate();
		}

		private void on_compiler_connected()
		{
			_console_view.logi("editor", "Compiler connected");
			_compiler.receive_async();
		}

		private void on_compiler_disconnected()
		{
			_console_view.logi("editor", "Compiler disconnected");
		}

		private void on_engine_connected()
		{
			_console_view.logi("editor", "Engine connected");
			_engine.receive_async();
		}

		private void on_engine_disconnected()
		{
			_console_view.logi("editor", "Engine disconnected");
		}

		private void on_game_connected()
		{
			_console_view.logi("editor", "Game connected");
			_game.receive_async();
		}

		private void on_game_disconnected()
		{
			_action_group.get_action("test-level").icon_name = "game-run";
			_console_view.logi("editor", "Game disconnected");
			_project.delete_level_editor_test_level();
		}

		private void on_message_received(ConsoleClient client, uint8[] json)
		{
			Hashtable msg = JSON.decode(json) as Hashtable;
			string msg_type = msg["type"] as string;

			if (msg_type == "message")
			{
				_console_view.log((string)msg["system"], (string)msg["message"], (string)msg["severity"]);
			}
			else if (msg_type == "add_file")
			{
				string path = (string)msg["path"];

				_project.add_file(path);
			}
			else if (msg_type == "remove_file")
			{
				string path = (string)msg["path"];

				_project.remove_file(path);
			}
			else if (msg_type == "compile")
			{
				// Guid id = Guid.parse((string)msg["id"]);

				if (msg.has_key("start"))
				{
					// FIXME
				}
				else if (msg.has_key("success"))
				{
					_data_compiler.finished((bool)msg["success"]);
				}
			}
			else if (msg_type == "unit_spawned")
			{
				string id             = (string)           msg["id"];
				string name           = (string)           msg["name"];
				ArrayList<Value?> pos = (ArrayList<Value?>)msg["position"];
				ArrayList<Value?> rot = (ArrayList<Value?>)msg["rotation"];
				ArrayList<Value?> scl = (ArrayList<Value?>)msg["scale"];

				_level.on_unit_spawned(Guid.parse(id)
					, name
					, Vector3.from_array(pos)
					, Quaternion.from_array(rot)
					, Vector3.from_array(scl)
					);
			}
			else if (msg_type == "sound_spawned")
			{
				string id             = (string)           msg["id"];
				string name           = (string)           msg["name"];
				ArrayList<Value?> pos = (ArrayList<Value?>)msg["position"];
				ArrayList<Value?> rot = (ArrayList<Value?>)msg["rotation"];
				ArrayList<Value?> scl = (ArrayList<Value?>)msg["scale"];
				double range          = (double)           msg["range"];
				double volume         = (double)           msg["volume"];
				bool loop             = (bool)             msg["loop"];

				_level.on_sound_spawned(Guid.parse(id)
					, name
					, Vector3.from_array(pos)
					, Quaternion.from_array(rot)
					, Vector3.from_array(scl)
					, range
					, volume
					, loop
					);
			}
			else if (msg_type == "move_objects")
			{
				Hashtable ids           = (Hashtable)msg["ids"];
				Hashtable new_positions = (Hashtable)msg["new_positions"];
				Hashtable new_rotations = (Hashtable)msg["new_rotations"];
				Hashtable new_scales    = (Hashtable)msg["new_scales"];

				ArrayList<string> keys = new ArrayList<string>.wrap(ids.keys.to_array());
				keys.sort(Gee.Functions.get_compare_func_for(typeof(string)));

				Guid[] n_ids             = new Guid[keys.size];
				Vector3[] n_positions    = new Vector3[keys.size];
				Quaternion[] n_rotations = new Quaternion[keys.size];
				Vector3[] n_scales       = new Vector3[keys.size];

				for (int i = 0; i < keys.size; ++i)
				{
					string k = keys[i];

					n_ids[i]       = Guid.parse((string)ids[k]);
					n_positions[i] = Vector3.from_array((ArrayList<Value?>)(new_positions[k]));
					n_rotations[i] = Quaternion.from_array((ArrayList<Value?>)new_rotations[k]);
					n_scales[i]    = Vector3.from_array((ArrayList<Value?>)new_scales[k]);
				}

				_level.on_move_objects(n_ids, n_positions, n_rotations, n_scales);
			}
			else if (msg_type == "selection")
			{
				Hashtable objects = (Hashtable)msg["objects"];

				ArrayList<string> keys = new ArrayList<string>.wrap(objects.keys.to_array());
				keys.sort(Gee.Functions.get_compare_func_for(typeof(string)));

				Guid[] ids = new Guid[keys.size];

				for (int i = 0; i < keys.size; ++i)
				{
					string k = keys[i];
					ids[i] = Guid.parse((string)objects[k]);
				}

				_level.on_selection(ids);
			}
			else if (msg_type == "error")
			{
				_console_view.loge("editor", "Error: " + (string)msg["message"]);
			}
			else
			{
				_console_view.loge("editor", "Unknown message type: " + msg_type);
			}

			// Receive next message
			client.receive_async();
		}

		private void send_state()
		{
			StringBuilder sb = new StringBuilder();
			sb.append(LevelEditorApi.set_grid_size(_grid_size));
			sb.append(LevelEditorApi.set_rotation_snap(_rotation_snap));
			sb.append(LevelEditorApi.enable_show_grid(_show_grid));
			sb.append(LevelEditorApi.enable_snap_to_grid(_snap_to_grid));
			sb.append(LevelEditorApi.enable_debug_render_world(_debug_render_world));
			sb.append(LevelEditorApi.enable_debug_physics_world(_debug_physics_world));
			sb.append(LevelEditorApi.set_tool_type(_tool_type));
			sb.append(LevelEditorApi.set_snap_mode(_snap_mode));
			sb.append(LevelEditorApi.set_reference_system(_reference_system));
			_engine.send_script(sb.str);
		}

		private bool on_button_press(EventButton ev)
		{
			// Prevent accelerators to step on camera's toes
			remove_accel_group(_ui_manager.get_accel_group());
			return true;
		}

		private bool on_button_release(EventButton ev)
		{
			add_accel_group(_ui_manager.get_accel_group());
			return true;
		}

		private void start_compiler()
		{
			string args[] =
			{
				ENGINE_EXE,
				"--source-dir", _project.source_dir(),
				"--data-dir", _project.data_dir(),
				"--map-source-dir", "core", _project.toolchain_dir(),
				"--server",
				"--wait-console",
				null
			};

			GLib.SubprocessLauncher sl = new GLib.SubprocessLauncher(subprocess_flags());
			sl.set_cwd(ENGINE_DIR);
			try
			{
				_compiler_process = sl.spawnv(args);
			}
			catch (Error e)
			{
				_console_view.loge("editor", e.message);
			}

			for (int tries = 0; !_compiler.is_connected() && tries < 5; ++tries)
			{
				_compiler.connect("127.0.0.1", CROWN_DEFAULT_SERVER_PORT);
				GLib.Thread.usleep(250*1000);
			}

			_data_compiler.compile.begin(_project.data_dir(), _project.platform(), (obj, res) => {
				if (_data_compiler.compile.end(res))
				{
					if (_engine_view != null)
						return;

					_engine_view = new EngineView(_engine);
					_engine_view.realized.connect(on_engine_view_realized);
					_engine_view.button_press_event.connect(on_button_press);
					_engine_view.button_release_event.connect(on_button_release);

					_engine_view_overlay.add(_engine_view);
					_engine_view_overlay.add_overlay(_toolbar);

					_engine_slide.show_widget(_engine_view_overlay);
					_inspector_slide.show_widget(_inspector_pane);
				}
			});
		}

		private void stop_compiler()
		{
			_compiler.send(DataCompilerApi.quit());
			_compiler.close();

			if (_compiler_process != null)
			{
				try
				{
					_compiler_process.wait();
				}
				catch (Error e)
				{
					_console_view.loge("editor", e.message);
				}
			}
		}

		private void start_engine(uint window_xid)
		{
			if (window_xid == 0)
				return;

			string args[] =
			{
				ENGINE_EXE,
				"--data-dir", _project.data_dir(),
				"--boot-dir", LEVEL_EDITOR_BOOT_DIR,
				"--parent-window", window_xid.to_string(),
				"--wait-console",
				null
			};

			GLib.SubprocessLauncher sl = new GLib.SubprocessLauncher(subprocess_flags());
			sl.set_cwd(ENGINE_DIR);
			try
			{
				_engine_process = sl.spawnv(args);
			}
			catch (Error e)
			{
				_console_view.loge("editor", e.message);
			}

			for (int tries = 0; !_engine.is_connected() && tries < 10; ++tries)
			{
				_engine.connect("127.0.0.1", 10001);
				GLib.Thread.usleep(500*1000);
			}

			_level.send_level();
			send_state();
		}

		private void stop_engine()
		{
			_engine.send_script("Device.quit()");
			_engine.close();

			if (_engine_process != null)
			{
				try
				{
					_engine_process.wait();
				}
				catch (Error e)
				{
					_console_view.loge("editor", e.message);
				}
			}
		}

		private void restart_engine()
		{
			stop_engine();
			start_engine(_engine_view.window_id);
		}

		private void start_game(StartGame sg)
		{
			_database.dump(_project.level_editor_test_level());

			_data_compiler.compile.begin(_project.data_dir(), _project.platform(), (obj, res) => {
				if (_data_compiler.compile.end(res))
				{
					string args[] =
					{
						ENGINE_EXE,
						"--data-dir", _project.data_dir(),
						"--console-port", "12345",
						"--wait-console",
						"--lua-string", sg == StartGame.TEST ? "TEST=true" : "",
						null
					};

					GLib.SubprocessLauncher sl = new GLib.SubprocessLauncher(subprocess_flags());
					sl.set_cwd(ENGINE_DIR);

					try
					{
						_game_process = sl.spawnv(args);
					}
					catch (Error e)
					{
						_console_view.loge("editor", e.message);
					}

					for (int tries = 0; !_game.is_connected() && tries < 10; ++tries)
					{
						_game.connect("127.0.0.1", 12345);
						GLib.Thread.usleep(500*1000);
					}
				}
			});
		}

		private void stop_game()
		{
			_game.send_script("Device.quit()");
			_game.close();

			if (_game_process != null)
			{
				try
				{
					_game_process.wait();
				}
				catch (Error e)
				{
					_console_view.loge("editor", e.message);
				}
			}
		}

		private void deploy_game()
		{
			FileChooserDialog fcd = new FileChooserDialog("Select destination directory..."
				, null
				, FileChooserAction.SELECT_FOLDER
				, "Cancel"
				, ResponseType.CANCEL
				, "Open"
				, ResponseType.ACCEPT
				);

			if (fcd.run() == (int)ResponseType.ACCEPT)
			{
				GLib.File data_dir = File.new_for_path(fcd.get_filename());

				string args[] =
				{
					ENGINE_EXE,
					"--source-dir", _project.source_dir(),
					"--map-source-dir", "core", _project.toolchain_dir(),
					"--data-dir", data_dir.get_path(),
					"--compile",
					null
				};

				GLib.SubprocessLauncher sl = new GLib.SubprocessLauncher(subprocess_flags());
				sl.set_cwd(ENGINE_DIR);
				try
				{
					GLib.Subprocess compiler = sl.spawnv(args);
					compiler.wait();
					if (compiler.get_exit_status() == 0)
					{
						GLib.File engine_exe = File.new_for_path(ENGINE_EXE);
						GLib.File engine_exe_dest = File.new_for_path(data_dir.get_path() + "/" + ENGINE_EXE);
						engine_exe.copy(engine_exe_dest, FileCopyFlags.OVERWRITE);

						_console_view.logi("editor", "Project deployed to `%s`".printf(data_dir.get_path()));
					}
				}
				catch (Error e)
				{
					_console_view.logi("editor", "%s".printf(e.message));
					_console_view.logi("editor", "Failed to deploy project");
				}
			}

			fcd.destroy();
		}

		private void on_engine_view_realized()
		{
			start_engine(_engine_view.window_id);
		}

		private void on_tool_changed(Gtk.Action action)
		{
			RadioAction ra = (RadioAction)action;
			_tool_type = (ToolType)ra.current_value;
			send_state();
		}

		private void on_snap_mode_changed(Gtk.Action action)
		{
			RadioAction ra = (RadioAction)action;
			_snap_mode = (SnapMode)ra.current_value;
			send_state();
		}

		private void on_reference_system_changed(Gtk.Action action)
		{
			RadioAction ra = (RadioAction)action;
			_reference_system = (ReferenceSystem)ra.current_value;
			send_state();
		}

		private void on_grid_changed(Gtk.Action action)
		{
			RadioAction ra = (RadioAction)action;
			_grid_size = (float)ra.current_value/100.0;
			send_state();
		}

		private void on_rotation_snap_changed(Gtk.Action action)
		{
			RadioAction ra = (RadioAction)action;
			_rotation_snap = (float)ra.current_value;
			send_state();
		}

		private void new_level()
		{
			_level.load_empty_level();
			_level.send_level();
		}

		private void load_level()
		{
			FileChooserDialog fcd = new FileChooserDialog("Open Level..."
				, this
				, FileChooserAction.OPEN
				, "Cancel"
				, ResponseType.CANCEL
				, "Open"
				, ResponseType.ACCEPT
				);
			fcd.add_filter(_file_filter);
			fcd.set_current_folder(_project.source_dir());

			if (fcd.run() == (int)ResponseType.ACCEPT)
			{
				string filename = fcd.get_filename();
				if (filename.has_prefix(_project.source_dir()))
				{
					if (filename.has_suffix(".level") && filename != _level._filename)
					{
						_level.load(filename);
						_level.send_level();
						send_state();
					}
				}
				else
				{
					_console_view.loge("editor", "Level not loaded: file must be within `%s`".printf(_project.source_dir()));
				}
			}

			fcd.destroy();
		}

		private void load_project()
		{
			FileChooserDialog fcd = new FileChooserDialog("Open Project..."
				, this
				, FileChooserAction.SELECT_FOLDER
				, "Cancel"
				, ResponseType.CANCEL
				, "Open"
				, ResponseType.ACCEPT
				);

			if (fcd.run() == (int)ResponseType.ACCEPT)
			{
				string filename = fcd.get_filename();
				_console_view.logi("editor", "Loading project `%s`...".printf(filename));
				_project.load(filename, _project.toolchain_dir());

				_level.load_empty_level();
				stop_compiler();
				start_compiler();
				restart_engine();
				_resource_browser.restart_engine();
			}

			fcd.destroy();
		}

		private bool save_as()
		{
			bool saved = false;

			FileChooserDialog fcd = new FileChooserDialog("Save As..."
				, this
				, FileChooserAction.SAVE
				, "Cancel"
				, ResponseType.CANCEL
				, "Save"
				, ResponseType.ACCEPT
				);
			fcd.add_filter(_file_filter);
			fcd.set_current_folder(_project.source_dir());

			if (fcd.run() == (int)ResponseType.ACCEPT)
			{
				string filename = fcd.get_filename();
				if (filename.has_prefix(_project.source_dir()))
				{
					_level.save(filename.has_suffix(".level") ? filename : filename + ".level");
					saved = true;
				}
				else
				{
					_console_view.loge("editor", "Level not saved: file must be within `%s`".printf(_project.source_dir()));
				}
			}

			fcd.destroy();
			return saved;
		}

		private bool save()
		{
			bool saved = false;

			if (_level._filename == null)
			{
				saved = save_as();
			}
			else
			{
				_level.save(_level._filename);
				saved = true;
			}

			return saved;
		}

		private bool save_timeout()
		{
			if (_level._filename != null)
				save();

			return true;
		}

		private void shutdown()
		{
			if (_resource_browser != null)
				_resource_browser.destroy();

			if (_preferences_dialog != null)
				_preferences_dialog.destroy();

			stop_game();
			stop_engine();
			stop_compiler();
			Gtk.main_quit();
		}

		private void quit()
		{
			if (!_database.changed())
			{
				shutdown();
				return;
			}

			Gtk.MessageDialog md = new Gtk.MessageDialog(this
				, Gtk.DialogFlags.MODAL
				, Gtk.MessageType.WARNING
				, Gtk.ButtonsType.NONE
				, "File changed, save?"
				);
			md.add_button("Quit _without Saving", ResponseType.NO);
			md.add_button("_Cancel", ResponseType.CANCEL);
			md.add_button("_Save", ResponseType.YES);
			md.set_default_response(ResponseType.YES);
			int rt = md.run();
			md.destroy();

			if (rt == (int)ResponseType.YES && save() || rt == (int)ResponseType.NO)
				shutdown();
		}

		private void on_new_level()
		{
			if (!_database.changed())
			{
				new_level();
				send_state();
				return;
			}

			Gtk.MessageDialog md = new Gtk.MessageDialog(this
				, Gtk.DialogFlags.MODAL
				, Gtk.MessageType.WARNING
				, Gtk.ButtonsType.NONE
				, "File changed, save?"
				);
			md.add_button("New _without Saving", ResponseType.NO);
			md.add_button("_Cancel", ResponseType.CANCEL);
			md.add_button("_Save", ResponseType.YES);
			md.set_default_response(ResponseType.YES);
			int rt = md.run();
			md.destroy();

			if (rt == (int)ResponseType.YES && save() || rt == (int)ResponseType.NO)
			{
				new_level();
				send_state();
			}
		}

		private void on_open_level(Gtk.Action action)
		{
			if (!_database.changed())
			{
				load_level();
				return;
			}

			Gtk.MessageDialog md = new Gtk.MessageDialog(this
				, Gtk.DialogFlags.MODAL
				, Gtk.MessageType.WARNING
				, Gtk.ButtonsType.NONE
				, "File changed, save?"
				);
			md.add_button("Open _without Saving", ResponseType.NO);
			md.add_button("_Cancel", ResponseType.CANCEL);
			md.add_button("_Save", ResponseType.YES);
			md.set_default_response(ResponseType.YES);
			int rt = md.run();
			md.destroy();

			if (rt == (int)ResponseType.YES && save() || rt == (int)ResponseType.NO)
				load_level();
		}

		private void on_open_project(Gtk.Action action)
		{
			if (!_database.changed())
			{
				load_project();
				return;
			}

			Gtk.MessageDialog md = new Gtk.MessageDialog(this
				, Gtk.DialogFlags.MODAL
				, Gtk.MessageType.WARNING
				, Gtk.ButtonsType.NONE
				, "File changed, save?"
				);
			md.add_button("Open _without Saving", ResponseType.NO);
			md.add_button("_Cancel", ResponseType.CANCEL);
			md.add_button("_Save", ResponseType.YES);
			md.set_default_response(ResponseType.YES);
			int rt = md.run();
			md.destroy();

			if (rt == (int)ResponseType.YES && save() || rt == (int)ResponseType.NO)
				load_project();
		}

		private void on_save(Gtk.Action action)
		{
			save();
		}

		private void on_save_as(Gtk.Action action)
		{
			save_as();
		}

		// If it returns true then filenames and out_dir are valid.
		private bool on_import_begin(Gtk.FileFilter ff, ref SList<string> filenames, ref string out_dir)
		{
			FileChooserDialog fcd = new FileChooserDialog("Import..."
				, this
				, FileChooserAction.OPEN
				, "Cancel"
				, ResponseType.CANCEL
				, "Open"
				, ResponseType.ACCEPT
				);
			fcd.select_multiple = true;
			fcd.add_filter(ff);

			if (fcd.run() != (int)ResponseType.ACCEPT)
			{
				fcd.destroy();
				return false;
			}

			filenames = fcd.get_filenames();
			fcd.destroy();

			FileChooserDialog dst = new FileChooserDialog("Select destination folder..."
				, this
				, FileChooserAction.SELECT_FOLDER
				, "Cancel"
				, ResponseType.CANCEL
				, "Select"
				, ResponseType.ACCEPT
				);
			dst.set_current_folder(_project.source_dir());

			if (dst.run() != (int)ResponseType.ACCEPT)
			{
				dst.destroy();
				return false;
			}

			out_dir = dst.get_filename();
			dst.destroy();
			return true;
		}

		private void on_import_end()
		{
			_data_compiler.compile.begin(_project.data_dir(), _project.platform(), (obj, res) => {
				_data_compiler.compile.end(res);
			});
		}

		private void on_import_sprites(Gtk.Action action)
		{
			Gtk.FileFilter ff = new FileFilter();
			ff.set_filter_name("Sprite (*.png)");
			ff.add_pattern("*.png");

			SList<string> filenames = new SList<string>();
			string out_dir = "";
			if (on_import_begin(ff, ref filenames, ref out_dir))
			{
				_project.import_sprites(filenames, out_dir);
				on_import_end();
			}
		}

		private void on_import_meshes(Gtk.Action action)
		{
			Gtk.FileFilter ff = new FileFilter();
			ff.set_filter_name("Mesh (*.mesh)");
			ff.add_pattern("*.mesh");

			SList<string> filenames = new SList<string>();
			string out_dir = "";
			if (on_import_begin(ff, ref filenames, ref out_dir))
			{
				_project.import_meshes(filenames, out_dir);
				on_import_end();
			}
		}

		private void on_import_sounds(Gtk.Action action)
		{
			Gtk.FileFilter ff = new FileFilter();
			ff.set_filter_name("Sound (*.wav)");
			ff.add_pattern("*.wav");

			SList<string> filenames = new SList<string>();
			string out_dir = "";
			if (on_import_begin(ff, ref filenames, ref out_dir))
			{
				_project.import_sounds(filenames, out_dir);
				on_import_end();
			}
		}

		private void on_import_textures(Gtk.Action action)
		{
			Gtk.FileFilter ff = new FileFilter();
			ff.set_filter_name("Texture (*.png, *.tga, *.dds, *.ktx, *.pvr)");
			ff.add_pattern("*.png");
			ff.add_pattern("*.tga");
			ff.add_pattern("*.dds");
			ff.add_pattern("*.ktx");
			ff.add_pattern("*.pvr");

			SList<string> filenames = new SList<string>();
			string out_dir = "";
			if (on_import_begin(ff, ref filenames, ref out_dir))
			{
				_project.import_textures(filenames, out_dir);
				on_import_end();
			}
		}

		private void on_preferences(Gtk.Action action)
		{
			if (_preferences_dialog == null)
			{
				_preferences_dialog = new PreferencesDialog(_engine);
				_preferences_dialog.set_transient_for(this);
				_preferences_dialog.delete_event.connect(() => { _preferences_dialog.hide(); return true; });
			}

			_preferences_dialog.show_all();
		}

		private void on_deploy(Gtk.Action action)
		{
			deploy_game();
		}

		private void on_quit(Gtk.Action action)
		{
			quit();
		}

		private void on_show_grid(Gtk.Action action)
		{
			ToggleAction ta = (ToggleAction)action;
			_show_grid = ta.active;
			send_state();
		}

		private void on_custom_grid()
		{
			Gtk.Dialog dg = new Gtk.Dialog.with_buttons("Grid size"
				, this
				, DialogFlags.MODAL
				, "Cancel"
				, ResponseType.CANCEL
				, "Ok"
				, ResponseType.OK
				, null
				);

			SpinButtonDouble sb = new SpinButtonDouble(_grid_size, 0.1, 1000);
			sb._x.activate.connect(() => { dg.response(ResponseType.OK); });
			dg.get_content_area().add(sb);
			dg.skip_taskbar_hint = true;
			dg.show_all();

			if (dg.run() == (int)ResponseType.OK)
			{
				_grid_size = sb.value;
				send_state();
			}

			dg.destroy();
		}

		private void on_rotation_snap(Gtk.Action action)
		{
			Gtk.Dialog dg = new Gtk.Dialog.with_buttons("Rotation snap"
				, this
				, DialogFlags.MODAL
				, "Cancel"
				, ResponseType.CANCEL
				, "Ok"
				, ResponseType.OK
				, null
				);

			SpinButtonDouble sb = new SpinButtonDouble(_rotation_snap, 1.0, 180.0);
			sb._x.activate.connect(() => { dg.response(ResponseType.OK); });
			dg.get_content_area().add(sb);
			dg.skip_taskbar_hint = true;
			dg.show_all();

			if (dg.run() == (int)ResponseType.OK)
			{
				_rotation_snap = sb.value;
				send_state();
			}

			dg.destroy();
		}

		private void on_create_primitive(Gtk.Action action)
		{
			if (action.name == "primitive-cube")
				_engine.send_script(LevelEditorApi.set_placeable("unit", "core/units/primitives/cube"));
			else if (action.name == "primitive-sphere")
				_engine.send_script(LevelEditorApi.set_placeable("unit", "core/units/primitives/sphere"));
			else if (action.name == "primitive-cone")
				_engine.send_script(LevelEditorApi.set_placeable("unit", "core/units/primitives/cone"));
			else if (action.name == "primitive-cylinder")
				_engine.send_script(LevelEditorApi.set_placeable("unit", "core/units/primitives/cylinder"));
			else if (action.name == "primitive-plane")
				_engine.send_script(LevelEditorApi.set_placeable("unit", "core/units/primitives/plane"));
			else if (action.name == "camera")
				_engine.send_script(LevelEditorApi.set_placeable("unit", "core/units/camera"));
			else if (action.name == "light")
				_engine.send_script(LevelEditorApi.set_placeable("unit", "core/units/light"));
			else if (action.name == "sound-source")
				_engine.send_script(LevelEditorApi.set_placeable("sound", ""));

			_action_group.get_action("place").activate();
		}

		private void on_camera_view(Gtk.Action action)
		{
			if (action.name == "camera-view-perspective")
				_engine.send_script("LevelEditor:camera_view_perspective()");
			else if (action.name == "camera-view-front")
				_engine.send_script("LevelEditor:camera_view_front()");
			else if (action.name == "camera-view-back")
				_engine.send_script("LevelEditor:camera_view_back()");
			else if (action.name == "camera-view-right")
				_engine.send_script("LevelEditor:camera_view_right()");
			else if (action.name == "camera-view-left")
				_engine.send_script("LevelEditor:camera_view_left()");
			else if (action.name == "camera-view-top")
				_engine.send_script("LevelEditor:camera_view_top()");
			else if (action.name == "camera-view-bottom")
				_engine.send_script("LevelEditor:camera_view_bottom()");
		}

		private void on_resource_browser(Gtk.Action action)
		{
			_resource_popover.show_all();
		}

		private void on_fullscreen(Gtk.Action action)
		{
			if (_fullscreen)
				this.unfullscreen();
			else
				this.fullscreen();
		}

		private void on_engine_restart(Gtk.Action action)
		{
			restart_engine();
		}

		private void on_reload_lua(Gtk.Action action)
		{
			_data_compiler.compile.begin(_project.data_dir(), _project.platform(), (obj, res) => {
				if (_data_compiler.compile.end(res))
				{
					_engine.send(DeviceApi.pause());
					_engine.send(DeviceApi.reload("lua", "core/editors/level_editor/level_editor"));
					_engine.send(DeviceApi.unpause());
				}
			});
		}

		public void on_snap_to_grid(Gtk.Action action)
		{
			ToggleAction ta = (ToggleAction)action;
			_snap_to_grid = ta.active;
			send_state();
		}

		private void on_debug_render_world(Gtk.Action action)
		{
			ToggleAction ta = (ToggleAction)action;
			_debug_render_world = ta.active;
			send_state();
		}

		private void on_debug_physics_world(Gtk.Action action)
		{
			ToggleAction ta = (ToggleAction)action;
			_debug_physics_world = ta.active;
			send_state();
		}

		private void on_run_game(Gtk.Action action)
		{
			if (_game.is_connected())
			{
				stop_game();
				action.icon_name = "game-run";
			}
			else
			{
				start_game(action.name == "test-level" ? StartGame.TEST : StartGame.NORMAL);
				action.icon_name = "game-stop";
			}
		}

		private void on_undo(Gtk.Action action)
		{
			_database.undo();
		}

		private void on_redo(Gtk.Action action)
		{
			_database.redo();
		}

		private void on_duplicate(Gtk.Action action)
		{
			_level.duplicate_selected_objects();
		}

		private void on_delete(Gtk.Action action)
		{
			_level.destroy_selected_objects();
		}

		private void on_manual(Gtk.Action action)
		{
			try
			{
				AppInfo.launch_default_for_uri("https://dbartolini.github.io/crown/html/v" + CROWN_VERSION, null);
			}
			catch (Error e)
			{
				_console_view.loge("editor", e.message);
			}
		}

		private void on_report_issue(Gtk.Action action)
		{
			try
			{
				AppInfo.launch_default_for_uri("https://github.com/dbartolini/crown/issues", null);
			}
			catch (Error e)
			{
				_console_view.loge("editor", e.message);
			}
		}

		private void on_open_last_log(Gtk.Action action)
		{
			File file = File.new_for_path(_project.data_dir() + "/last.log");
			try
			{
				AppInfo.launch_default_for_uri(file.get_uri(), null);
			}
			catch (Error e)
			{
				_console_view.loge("editor", e.message);
			}
		}

		private void on_about(Gtk.Action action)
		{
			Gtk.AboutDialog dlg = new Gtk.AboutDialog();
			dlg.set_destroy_with_parent(true);
			dlg.set_transient_for(this);
			dlg.set_modal(true);

			try
			{
				dlg.set_logo(new Pixbuf.from_resource("/org/crown/ui/icons/128x128/pepper.png"));
			}
			catch (Error e)
			{
				_console_view.loge("editor", e.message);
			}

			dlg.program_name = "Crown Game Engine";
			dlg.version = CROWN_VERSION;
			dlg.website = "https://github.com/dbartolini/crown";
			dlg.copyright = "Copyright (c) 2012-2018 Daniele Bartolini and individual contributors.";
			dlg.license = "Crown Game Engine.\n"
				+ "Copyright (c) 2012-2018 Daniele Bartolini and individual contributors.\n"
				+ "\n"
				+ "This program is free software; you can redistribute it and/or\n"
				+ "modify it under the terms of the GNU General Public License\n"
				+ "as published by the Free Software Foundation; either version 2\n"
				+ "of the License, or (at your option) any later version.\n"
				+ "\n"
				+ "This program is distributed in the hope that it will be useful,\n"
				+ "but WITHOUT ANY WARRANTY; without even the implied warranty of\n"
				+ "MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the\n"
				+ "GNU General Public License for more details.\n"
				+ "\n"
				+ "You should have received a copy of the GNU General Public License\n"
				+ "along with this program; if not, write to the Free Software\n"
				+ "Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.\n"
				;
			dlg.run();
			dlg.destroy();
		}

		private void on_destroy()
		{
			Gtk.main_quit();
		}

		private bool on_delete_event()
		{
			quit();
			return true;
		}
	}

	public static GLib.SubprocessFlags subprocess_flags()
	{
		GLib.SubprocessFlags flags = SubprocessFlags.NONE;
#if !CROWN_DEBUG
		flags |= SubprocessFlags.STDOUT_SILENCE | SubprocessFlags.STDERR_SILENCE;
#endif
		return flags;
	}

	public static int main (string[] args)
	{
		Gtk.init(ref args);
		Intl.setlocale(LocaleCategory.ALL, "C");
		Gtk.Settings.get_default().gtk_theme_name = "Adwaita";
		Gtk.Settings.get_default().gtk_application_prefer_dark_theme = true;

		Gtk.CssProvider provider = new Gtk.CssProvider();
		Gdk.Screen screen = Gdk.Display.get_default().get_default_screen();
		Gtk.StyleContext.add_provider_for_screen(screen, provider, STYLE_PROVIDER_PRIORITY_APPLICATION);
		provider.load_from_resource("/org/crown/ui/theme/style.css");

		Gtk.IconTheme.get_default().add_resource_path("/org/crown/ui/icons/theme");

		bool create_initial_files = false;
		string source_dir = "";
		string level_resource = "";
		string toolchain_dir = "";

		if (args.length > 1)
		{
			if (!GLib.FileUtils.test(args[1], FileTest.EXISTS) || !GLib.FileUtils.test(args[1], FileTest.IS_DIR))
			{
				stdout.printf("Source directory does not exist or it is not a directory\n");
				return -1;
			}

			source_dir = args[1];
		}
		else
		{
			FileChooserDialog fcd = new FileChooserDialog("Select folder where to create new project..."
				, null
				, FileChooserAction.SELECT_FOLDER
				, "Cancel"
				, ResponseType.CANCEL
				, "Select"
				, ResponseType.ACCEPT
				);

			if (fcd.run() != (int)ResponseType.ACCEPT)
			{
				fcd.destroy();
				return -1;
			}

			string dir = fcd.get_filename();
			fcd.destroy();

			if (GLib.FileUtils.test(dir, FileTest.IS_REGULAR))
			{
				stdout.printf("Source directory can't be a regular file\n");
				return -1;
			}

			source_dir = dir;
			create_initial_files = true;
		}

		if (args.length > 2)
		{
			// Validation is done below after the Project object instantiation
			level_resource = args[2];
		}

		if (args.length > 3)
		{
			if (!GLib.FileUtils.test(args[3], FileTest.EXISTS) || !GLib.FileUtils.test(args[3], FileTest.IS_DIR))
			{
				stdout.printf("Toolchain directory does not exist or it is not a directory\n");
				return -1;
			}

			toolchain_dir = args[3];
		}
		else
		{
			bool found = false;

			/// More desirable paths come first
			string toolchain_paths[] =
			{
				"../..",
				"../../../samples"
			};

			for (int i = 0; i < toolchain_paths.length; ++i)
			{
				string path = Path.build_filename(toolchain_paths[i], "core");

				// Try to locate the toolchain directory
				if (GLib.FileUtils.test(path, FileTest.EXISTS) && GLib.FileUtils.test(path, FileTest.IS_DIR))
				{
					toolchain_dir = toolchain_paths[i];
					found = true;
					break;
				}
			}

			if (!found)
			{
				stdout.printf("Unable to find the toolchain directory\n");
				return -1;
			}
		}

		Project project = new Project();
		project.load(source_dir, toolchain_dir);
		if (create_initial_files)
			project.create_initial_files();

		Database database = new Database();
		ConsoleClient compiler = new ConsoleClient();
		ConsoleClient engine = new ConsoleClient();
		ConsoleClient game = new ConsoleClient();

		Level level = new Level(database, engine, project);
		LevelEditor editor = new LevelEditor(database, project, level, compiler, engine, game);

		if (level_resource != "")
		{
			string level_path = project.source_dir() + "/" + level_resource + ".level";
			if (!GLib.FileUtils.test(level_path, FileTest.EXISTS) || !GLib.FileUtils.test(level_path, FileTest.IS_REGULAR))
			{
				stdout.printf("Level resource '%s' does not exist.\n", level_resource);
				return -1;
			}

			level.load(level_path);
		}
		else
		{
			level.load_empty_level();
		}

		editor.show_all();

		Gtk.main();
		return 0;
	}
}