function Panel_Tunnels() : PanelContent() constructor {
	title = "Tunnels";
	showHeader	 = false;
	title_height = 64;
	padding		 = 24;
		
	#region data
		w = ui(320);
		h = ui(480);
		
		build_x = 0;
		build_y = 0;
		
		tunnel_ins = [];
		tunnel_select = noone;
		tunnel_hover  = noone;
		
		function scanNodes() {
			var amo = ds_map_size(NODE_MAP);
			var k   = ds_map_find_first(NODE_MAP);
		
			tunnel_ins = [];
			
			repeat(amo) {
				var node = NODE_MAP[? k];
				k = ds_map_find_next(NODE_MAP, k);
			
				if(instanceof(node) == "Node_Tunnel_In") 
					array_push(tunnel_ins, node);
			}
		}
		scanNodes();
		
		search_string = "";
		keyboard_lastchar = "";
		KEYBOARD_STRING = "";
		keyboard_lastkey = -1;
		
		search_res    = [];
		tb_search = new textBox(TEXTBOX_INPUT.text, function(str) { 
			search_string = string(str); 
			searchNodes();
		});
		tb_search.align			= fa_left;
		tb_search.auto_update	= true;
		tb_search.boxColor		= COLORS._main_icon_light;
		WIDGET_CURRENT			= tb_search;
		
		function searchNodes() {
			search_res = [];
			for( var i = 0; i < array_length(tunnel_ins); i++ ) {
				var node = tunnel_ins[i];
				var key  = node.inputs[| 0].getValue(0);
			
				if(string_pos(search_string, key) == 0) continue;
				array_push(search_res, node);
			}
		}
	#endregion
	
	function onResize() {
		PANEL_PADDING
		
		sc_tunnel.resize(w - ui(padding + padding), h - ui(title_height + padding + 40));
	}
	
	#region content
		sc_tunnel = new scrollPane(w - ui(padding + padding), h - ui(title_height + padding + 40), function(_y, _m) {
			draw_clear_alpha(COLORS.panel_bg_clear, 0);
			var _h  = 0;
			var ww  = sc_tunnel.surface_w;
			var hg  = ui(36);
			var i   = 0;
		
			var arr = search_string == ""? tunnel_ins : search_res;
			tunnel_hover  = noone;
		
			for( var i = 0; i < array_length(arr); i++ ) {
				var node = arr[i];

				if(point_in_rectangle(_m[0], _m[1], 0, _y, ww, _y + hg)) {
					var cc = merge_color(COLORS._main_icon_light, COLORS._main_icon, 0.25);
					draw_sprite_stretched_ext(THEME.ui_panel_bg, 0, 0, _y, ww, hg, cc, 1);
					tunnel_hover  = node;
				
					if(mouse_press(mb_left, sc_tunnel.active) && _m[0] < ww - ui(32 + 32 * 2)) 
						tunnel_select = tunnel_select == node? noone : node;
				} else 
					draw_sprite_stretched_ext(THEME.ui_panel_bg, 0, 0, _y, ww, hg, COLORS._main_icon_light, 1);
			
				var key = node.inputs[| 0].getValue(0);
				var bw = ui(28);
				var bh = ui(28);
				var bx = ww - ui(4) - bw;
				var by = _y + (hg - bh) / 2;
			
				if(buttonInstant(THEME.button_hide, bx, by, bw, bh, _m, sc_tunnel.active, sc_tunnel.hover, "Go to node", THEME.node_goto) == 2)
					graphFocusNode(node);
				bx -= ui(32);
			
				if(buttonInstant(THEME.button_hide, bx, by, bw, bh, _m, sc_tunnel.active, sc_tunnel.hover, "Create tunnel out", THEME.tunnel) == 2) {
					var n = nodeBuild("Node_Tunnel_Out", build_x, build_y);
					n.inputs[| 0].setValue(key);
					
					if(in_dialog) instance_destroy();
				}
				bx -= ui(32);
			
				draw_sprite_ui(THEME.tunnel, 1, ui(4 + 16), _y + hg / 2);
				draw_set_text(f_p0, fa_left, fa_center, key == ""? COLORS._main_text_sub : COLORS._main_text);
				draw_text(ui(4 + 32 + 4), _y + hg / 2, key == ""? "[no key]" : key);
			
				_y += hg + ui(4);
				_h += hg + ui(4);
			
				if(tunnel_select == node) {
					var amo = ds_map_size(TUNNELS_OUT);
					var k   = ds_map_find_first(TUNNELS_OUT);
		
					repeat(amo) { 
						var _k  = k;
						k = ds_map_find_next(TUNNELS_OUT, k);
					
						var out = TUNNELS_OUT[? _k];
						if(out != key || !ds_map_exists(NODE_MAP, _k)) 
							continue;
				
						var _node = NODE_MAP[? _k];
					
						draw_sprite_ui(THEME.tunnel, 0, ui(32), _y + ui(10), 0.75, 0.75, 0, COLORS._main_icon);
						draw_set_text(f_p1, fa_left, fa_center, COLORS._main_text_sub);
						draw_text(ui(32 + 16), _y + ui(10), _node.display_name == ""? _node.name : _node.display_name);
					
					
						if(point_in_rectangle(_m[0], _m[1], 0, _y, ww, _y + ui(20))) 
							tunnel_hover  = _node;
					
						_y += ui(20);
						_h += ui(20);
					}
				
					_y += ui(8);
					_h += ui(8);
				}
			}
		
			return _h;
		})
	#endregion

	function drawContent(panel) {
		PANEL_PADDING
		PANEL_TITLE
		
		scanNodes();
		
		var px = ui(padding);
		var py = ui(title_height);
		var pw = w - ui(padding + padding);
		var ph = h - ui(title_height + padding);
	
		draw_sprite_stretched(THEME.ui_panel_bg, !in_dialog, px - ui(8), py - ui(8), pw + ui(16), ph + ui(16));
		if(pFOCUS) WIDGET_CURRENT = tb_search;
		tb_search.draw(px, py, pw, ui(32), search_string, [mx, my]);
		if(search_string == "")
			tb_search.sprite_index = 1;
	
		sc_tunnel.setActiveFocus(pFOCUS, pHOVER);
		sc_tunnel.draw(px, py + ui(40), mx - px, my - (py + ui(40)));
		
		var bx = w - ui(32 + 16);
		var by = title_height / 2 - ui(16 + !in_dialog * 2);
			
		if(buttonInstant(THEME.button_hide, bx, by, ui(32), ui(32), [mx, my], pFOCUS, pHOVER, "Create tunnel", THEME.tunnel, 1, c_white) == 2) {
			nodeBuild("Node_Tunnel_In", build_x, build_y);
			instance_destroy();
		}
	}
}