Загрузил(а) файлы в 'flutter/lib'

flutter/lib/curve_painter.dart

@@ -8,71 +8,85 @@ class CurvePainter extends CustomPainter {
     Key? key,
     required this.graphData,
     required this.bfsPath,
-    required this.dfsStart,
+    required this.start,
+    required this.end,
     required this.dfsAccessTable,
   });
 
   List<int>? bfsPath;
   List<bool>? dfsAccessTable;
-  int? dfsStart;
+  int? start;
+  int? end;
   Graphs graphData;
-  final double dotRad = 6;
+  final double _dotRad = 6;
-  final double lineWidth = 2;
+  final double _lineWidth = 1.5;
-  final Color lineColor = Colors.black;
+  final Color _lineColor = Colors.black;
-  final double aboveHeight = 5;
+  final double _aboveHeight = 5;
-  double circleRad = 100;
+  double _circleRad = 100;
-  final TextStyle textStyle = TextStyle(
+  final TextStyle _textStyle = TextStyle(
-    color: Colors.green.shade900,
+    color: Colors.red.shade900,
+    decorationColor: Colors.green.shade900,
+    decorationThickness: 10,
+    decorationStyle: TextDecorationStyle.dashed,
     fontSize: 20,
   );
-
+  Map<int, Offset> _off = <int, Offset>{};
-  void drawLine(Canvas canvas, Offset p1, Offset p2) {
+  void _drawLine(Canvas canvas, Offset p1, Offset p2) {
     Paint p = Paint();
-    p.color = lineColor;
+    p.color = _lineColor;
-    p.strokeWidth = lineWidth;
+    p.strokeWidth = _lineWidth;
     canvas.drawLine(p1, p2, p);
   }
 
-  void drawDot(Canvas canvas, Offset p1) {
+  void _drawDot(Canvas canvas, Offset p1, [double plusRad = 0, Color? col]) {
+    col ??= Colors.yellow.shade900;
     var p = Paint();
-    p.color = Colors.yellow.shade900;
+    p.color = col;
-    p.strokeWidth = lineWidth + 2;
+    p.strokeWidth = _lineWidth + 2;
-    canvas.drawCircle(p1, dotRad, p);
+    canvas.drawCircle(p1, _dotRad + plusRad, p);
   }
 
-  void drawSelfConnect(Canvas canvas, Offset p1) {
+  void _drawSelfConnect(Canvas canvas, Offset p1) {
     var p = Paint();
-    p.color = lineColor;
+    p.color = _lineColor;
-    p.strokeWidth = lineWidth;
+    p.strokeWidth = _lineWidth;
     p.style = PaintingStyle.stroke;
-    canvas.drawCircle(Offset(p1.dx + dotRad + 20, p1.dy), dotRad + 20, p);
+    canvas.drawCircle(Offset(p1.dx + _dotRad + 20, p1.dy), _dotRad + 20, p);
   }
 
-  TextSpan _getTextSpan(String s) => TextSpan(text: s, style: textStyle);
+  TextSpan _getTextSpan(String s) => TextSpan(text: s, style: _textStyle);
   TextPainter _getTextPainter(String s) => TextPainter(
       text: _getTextSpan(s),
       textDirection: TextDirection.ltr,
       textAlign: TextAlign.center);
 
-  void drawDotNames(Canvas canvas, Offset place, String s) {
+  void _drawDotNames(Canvas canvas, Offset place, String s) {
     var textPainter = _getTextPainter(s);
     textPainter.layout();
     textPainter.paint(
         canvas,
         Offset((place.dx - textPainter.width),
-            (place.dy - textPainter.height) - aboveHeight));
+            (place.dy - textPainter.height) - _aboveHeight));
   }
 
-  void drawAboveText(Canvas canvas, Offset size, String s) {
+  void _drawDotNum(Canvas canvas, Offset size, String s) {
-    var textPainter = _getTextPainter(s);
+    var textPainter = TextPainter(
+        text: TextSpan(
+            text: s,
+            style: const TextStyle(
+              color: Colors.black,
+              fontSize: 17,
+            )),
+        textDirection: TextDirection.ltr,
+        textAlign: TextAlign.center);
     textPainter.layout();
     textPainter.paint(
         canvas,
-        Offset((size.dx - textPainter.width),
+        Offset((size.dx - textPainter.width) + 25,
-            (size.dy - textPainter.height) - aboveHeight));
+            (size.dy - textPainter.height) + _aboveHeight + 30));
   }
 
-  int getHighInputConnections() {
+  int _getHighInputConnections() {
     if (graphData.getDots().length != 1 && graphData.getDots().length <= 3) {
       return -1;
     }
@@ -83,17 +97,18 @@ class CurvePainter extends CustomPainter {
     return higest;
   }
 
-  Map<int, Offset> getDotPos(int dotsAm, Size size, [int? exclude]) {
+  Map<int, Offset> _getDotPos(int dotsAm, Size size) {
     Map<int, Offset> off = <int, Offset>{};
     var width = size.width / 2;
     var height = size.height / 2;
     int add = 0;
-    int h = getHighInputConnections();
+    int h = _getHighInputConnections();
     for (int i = 0; i < dotsAm; i++) {
       if ((i + 1) != h) {
-        double x = cos(2 * pi * (i - add) / (dotsAm - add)) * circleRad + width;
+        double x =
+            cos(2 * pi * (i - add) / (dotsAm - add)) * _circleRad + width;
         double y =
-            sin(2 * pi * (i - add) / (dotsAm - add)) * circleRad + height;
+            sin(2 * pi * (i - add) / (dotsAm - add)) * _circleRad + height;
 
         off[i + 1] = Offset(x, y);
       } else if ((i + 1) == h) {
@@ -110,7 +125,7 @@ class CurvePainter extends CustomPainter {
     return off;
   }
 
-  void drawHArrow(Canvas canvas, Size size, Offset from, Offset to,
+  void _drawHArrow(Canvas canvas, Size size, Offset from, Offset to,
       [bool doubleSided = false]) {
     Path path;
 
@@ -120,7 +135,7 @@ class CurvePainter extends CustomPainter {
       ..style = PaintingStyle.stroke
       ..strokeCap = StrokeCap.round
       ..strokeJoin = StrokeJoin.round
-      ..strokeWidth = lineWidth;
+      ..strokeWidth = _lineWidth;
 
     var length = sqrt((to.dx - from.dx) * (to.dx - from.dx) +
         (to.dy - from.dy) * (to.dy - from.dy));
@@ -131,8 +146,8 @@ class CurvePainter extends CustomPainter {
     path.relativeCubicTo(
         0,
         0,
-        -(from.dx + to.dx) / (length * 2) - 40,
+        -(from.dx + to.dx + length) / (length) - 40,
-        -(from.dy + to.dy) / (length * 2) - 40,
+        -(from.dy + to.dy + length) / (length) - 40,
         to.dx - from.dx,
         to.dy - from.dy);
     path =
@@ -140,7 +155,7 @@ class CurvePainter extends CustomPainter {
     canvas.drawPath(path, paint);
   }
 
-  void drawHighArrow(Canvas canvas, Size size, Offset from, Offset to,
+  void _drawHighArrow(Canvas canvas, Size size, Offset from, Offset to,
       [bool doubleSided = false]) {
     Path path;
 
@@ -150,7 +165,7 @@ class CurvePainter extends CustomPainter {
       ..style = PaintingStyle.stroke
       ..strokeCap = StrokeCap.round
       ..strokeJoin = StrokeJoin.round
-      ..strokeWidth = lineWidth;
+      ..strokeWidth = _lineWidth;
 
     var length = sqrt((to.dx - from.dx) * (to.dx - from.dx) +
         (to.dy - from.dy) * (to.dy - from.dy));
@@ -161,7 +176,7 @@ class CurvePainter extends CustomPainter {
     path.relativeCubicTo(
         0,
         0,
-        (from.dx + to.dx) / (length * 3) + 40,
+        (from.dx + to.dx) / (length * 2) + 40,
         (from.dy + to.dy) / (length * 2) + 40,
         to.dx - from.dx,
         to.dy - from.dy);
@@ -173,29 +188,29 @@ class CurvePainter extends CustomPainter {
     canvas.drawPath(path, paint);
   }
 
-  void drawConnections(
+  void _drawConnections(
       Canvas canvas, Size size, List<Dot> dots, Map<int, Offset> off) {
     for (var i in dots) {
       var list = i.getL();
       var beg = off[i.num];
       for (var d in list.keys) {
         if (d == i.num) {
-          drawSelfConnect(canvas, off[d]!);
+          _drawSelfConnect(canvas, off[d]!);
         } else {
           if (graphData.getDoubleSidedBool()) {
             if (d > i.num) {
-              drawHArrow(canvas, size, beg!, off[d]!, false);
+              _drawHArrow(canvas, size, beg!, off[d]!, false);
               if (graphData.getUseLengthBool()) {
-                drawDotNames(
+                _drawDotNames(
                     canvas,
                     Offset((off[d]!.dx + beg.dx) / 2 - 18,
                         (off[d]!.dy + beg.dy) / 2 - 18),
                     i.getL()[d].toString());
               }
             } else {
-              drawHighArrow(canvas, size, beg!, off[d]!, false);
+              _drawHighArrow(canvas, size, beg!, off[d]!, false);
               if (graphData.getUseLengthBool()) {
-                drawDotNames(
+                _drawDotNames(
                     canvas,
                     Offset((off[d]!.dx + beg.dx) / 2 + 30,
                         (off[d]!.dy + beg.dy) / 2 + 30),
@@ -203,9 +218,9 @@ class CurvePainter extends CustomPainter {
               }
             }
           } else {
-            drawLine(canvas, beg!, off[d]!);
+            _drawLine(canvas, beg!, off[d]!);
             if (graphData.getUseLengthBool()) {
-              drawDotNames(
+              _drawDotNames(
                   canvas,
                   Offset((off[d]!.dx + beg.dx) / 2, (off[d]!.dy + beg.dy) / 2),
                   i.getL()[d].toString());
@@ -216,52 +231,71 @@ class CurvePainter extends CustomPainter {
     }
   }
 
+  void _drawBFS(Canvas canvas) {
+    if (bfsPath != null) {
+      for (int i = 0; i < bfsPath!.length; i++) {
+        _drawDot(canvas, _off[bfsPath![i]]!, 8, Colors.yellow);
+      }
+      _drawDot(canvas, _off[start]!, 9, Colors.green);
+      _drawDot(canvas, _off[end]!, 7, Colors.red.shade200);
+      for (int i = 0; i < bfsPath!.length; i++) {
+        _drawDotNum(canvas, _off[bfsPath![i]]!, "bfs: №${i + 1}");
+      }
+    }
+  }
+
+  void _drawDFS(Canvas canvas) {
+    if (dfsAccessTable != null) {
+      for (int i = 0; i < dfsAccessTable!.length; i++) {
+        if (dfsAccessTable![i]) {
+          _drawDot(canvas, _off[i + 1]!, 8, Colors.green.shade500);
+          _drawDotNum(canvas, _off[i + 1]!, "dfs: visible");
+        } else {
+          _drawDot(canvas, _off[i + 1]!, 7, Colors.red.shade500);
+          _drawDotNum(canvas, _off[i + 1]!, "dfs: not visible");
+        }
+      }
+      _drawDot(canvas, _off[start]!, 9, Colors.green.shade900);
+    }
+  }
+
   @override
   void paint(Canvas canvas, Size size) {
     if (size.width > size.height) {
-      circleRad = size.height / 3;
+      _circleRad = size.height / 3;
     } else {
-      circleRad = size.width / 3;
+      _circleRad = size.width / 3;
     }
-    //var paint = Paint();
-    //drawLine(canvas, Offset(0, size.height / 2),
-    //Offset(size.width, size.height / 2));
 
-    //gr = getGraph();
+    _off = _getDotPos(graphData.getDotAmount(), size); //, higest);
-    //int higest = getHighConnections();
+    for (int i in _off.keys) {
-    //if (higest > -1) {
+      _drawDot(canvas, _off[i]!);
-    var off = getDotPos(graphData.getDotAmount(), size); //, higest);
+      //drawDotNames(canvas, off[i]!, "${graphData.getDots()[i - 1].getName()}:[$i]");
-    //off[higest] = Offset(size.width / 2, size.height / 2);
-    for (int i in off.keys) {
-      drawDot(canvas, off[i]!);
-      drawDotNames(
-          canvas, off[i]!, "${graphData.getDots()[i - 1].getName()}:[$i]");
     }
-    //var g = gr.getNoRepeatDots();
+
-    //print(g);
     var g = graphData.getDots();
-    drawConnections(canvas, size, g, off);
+    _drawBFS(canvas);
+    _drawDFS(canvas);
+    _drawConnections(canvas, size, g, _off);
     //pringArr(canvas, size);
     //drawArrow(canvas, Offset(size.width / 2, size.height / 2),
     //   Offset(size.width / 2 + 50, size.height / 2 + 200));
     //}
+
+    for (int i in _off.keys) {
+      //drawDot(canvas, off[i]!);
+      _drawDotNames(
+          canvas, _off[i]!, "${graphData.getDots()[i - 1].getName()}:[$i]");
+    }
   }
 
   @override
   bool shouldRepaint(CustomPainter oldDelegate) {
     return true;
   }
-
-  /*void _drawTextAt(String txt, Offset position, Canvas canvas) {
-    final textPainter = getTextPainter(txt);
-    textPainter.layout(minWidth: 0, maxWidth: 0);
-    Offset drawPosition =
-        Offset(position.dx, position.dy - (textPainter.height / 2));
-    textPainter.paint(canvas, drawPosition);
-  }*/
 }
 
-void pringArr(Canvas canvas, Size size) {
+/*void _pringArr(Canvas canvas, Size size) {
   TextSpan textSpan;
   TextPainter textPainter;
   Path path;
@@ -292,108 +326,4 @@ void pringArr(Canvas canvas, Size size) {
   );
   textPainter.layout(minWidth: size.width);
   textPainter.paint(canvas, Offset(0, size.height * 0.06));
-/*
+}*/
-  /// Draw a double sided arrow.
-  path = Path();
-  path.moveTo(size.width * 0.25, size.height * 0.2);
-  path.relativeCubicTo(0, 0, size.width * 0.25, 50, size.width * 0.5, 0);
-  path = ArrowPath.make(path: path, isDoubleSided: true);
-  canvas.drawPath(path, paint..color = Colors.cyan);
-
-  textSpan = const TextSpan(
-    text: 'Double sided arrow',
-    style: TextStyle(color: Colors.cyan),
-  );
-  textPainter = TextPainter(
-    text: textSpan,
-    textAlign: TextAlign.center,
-    textDirection: TextDirection.ltr,
-  );
-  textPainter.layout(minWidth: size.width);
-  textPainter.paint(canvas, Offset(0, size.height * 0.16));
-
-  /// Use complex path.
-  path = Path();
-  path.moveTo(size.width * 0.25, size.height * 0.3);
-  path.relativeCubicTo(0, 0, size.width * 0.25, 0, size.width * 0.5, 50);
-  path.relativeCubicTo(0, 0, -size.width * 0.25, 50, -size.width * 0.5, 50);
-  //path.relativeCubicTo(0, 0, size.width * 0.125, 10, size.width * 0.25, -10);
-  path = ArrowPath.make(path: path, isDoubleSided: true);
-  canvas.drawPath(path, paint..color = Colors.blue);
-
-  textSpan = const TextSpan(
-    text: 'Complex path',
-    style: TextStyle(color: Colors.blue),
-  );
-  textPainter = TextPainter(
-    text: textSpan,
-    textAlign: TextAlign.center,
-    textDirection: TextDirection.ltr,
-  );
-  textPainter.layout(minWidth: size.width);
-  textPainter.paint(canvas, Offset(0, size.height * 0.28));
-
-  /// Draw several arrows on the same path.
-  path = Path();
-  path.moveTo(size.width * 0.25, size.height * 0.53);
-  path.relativeCubicTo(0, 0, size.width * 0.25, 50, size.width * 0.5, 50);
-  path = ArrowPath.make(path: path);
-  path.relativeCubicTo(0, 0, -size.width * 0.25, 0, -size.width * 0.5, 50);
-  path = ArrowPath.make(path: path);
-  Path subPath = Path();
-  subPath.moveTo(size.width * 0.375, size.height * 0.53 + 100);
-  subPath.relativeCubicTo(0, 0, size.width * 0.125, 10, size.width * 0.25, -10);
-  subPath = ArrowPath.make(path: subPath, isDoubleSided: true);
-  path.addPath(subPath, Offset.zero);
-  canvas.drawPath(path, paint..color = Colors.cyan);
-
-  textSpan = const TextSpan(
-    text: 'Several arrows on the same path',
-    style: TextStyle(color: Colors.cyan),
-  );
-  textPainter = TextPainter(
-    text: textSpan,
-    textAlign: TextAlign.center,
-    textDirection: TextDirection.ltr,
-  );
-  textPainter.layout(minWidth: size.width);
-  textPainter.paint(canvas, Offset(0, size.height * 0.49));
-
-  /// Adjusted
-  path = Path();
-  path.moveTo(size.width * 0.1, size.height * 0.8);
-  path.relativeCubicTo(0, 0, size.width * 0.3, 50, size.width * 0.25, 75);
-  path = ArrowPath.make(path: path, isAdjusted: true);
-  canvas.drawPath(path, paint..color = Colors.blue);
-
-  textSpan = const TextSpan(
-    text: 'Adjusted',
-    style: TextStyle(color: Colors.blue),
-  );
-  textPainter = TextPainter(
-    text: textSpan,
-    textAlign: TextAlign.left,
-    textDirection: TextDirection.ltr,
-  );
-  textPainter.layout();
-  textPainter.paint(canvas, Offset(size.width * 0.2, size.height * 0.77));
-
-  /// Non adjusted.
-  path = Path();
-  path.moveTo(size.width * 0.6, size.height * 0.8);
-  path.relativeCubicTo(0, 0, size.width * 0.3, 50, size.width * 0.25, 75);
-  path = ArrowPath.make(path: path, isAdjusted: false);
-  canvas.drawPath(path, paint..color = Colors.blue);
-
-  textSpan = const TextSpan(
-    text: 'Non adjusted',
-    style: TextStyle(color: Colors.blue),
-  );
-  textPainter = TextPainter(
-    text: textSpan,
-    textAlign: TextAlign.left,
-    textDirection: TextDirection.ltr,
-  );
-  textPainter.layout();
-  textPainter.paint(canvas, Offset(size.width * 0.65, size.height * 0.77));*/
-}

flutter/lib/drawing_page.dart

@@ -0,0 +1,507 @@
+import 'package:graphs/src/graph.dart';
+import 'package:graphs/curve_painter.dart';
+
+import 'package:file_picker/file_picker.dart';
+import 'package:flutter/material.dart';
+
+Graphs getGraph() {
+  List<Dot> d = <Dot>[];
+  d.add(Dot.fromTwoLists("1", [2, 3], [5, 1]));
+  d.add(Dot.fromTwoLists("2", [1, 3], [1, 1]));
+  d.add(Dot.fromTwoLists("3", [1, 2], [1, 2]));
+  //d.add(Dot.fromTwoLists("Name1", [], []));
+  //d.add(Dot.fromTwoLists("Name2", [], []));
+  return Graphs.fromList("Имя", d, true, true);
+}
+
+class DrawingPage extends StatefulWidget {
+  const DrawingPage({Key? key}) : super(key: key);
+
+  @override
+  State<StatefulWidget> createState() => _DrawingPageState();
+}
+
+class _DrawingPageState extends State<DrawingPage> {
+  double screenSize = 0;
+  Graphs graphData = getGraph();
+  List<int>? bfsPath;
+  List<bool>? dfsAccessTable;
+  int? startDot;
+  int? endDot;
+  String? dropdownValue1;
+  String? dropdownValue2;
+
+  final _textNameController = TextEditingController();
+  final _textNumbController = TextEditingController();
+  final _textDestController = TextEditingController();
+  final _textLnthController = TextEditingController();
+  final _textGrNmController = TextEditingController();
+
+  void clearInputData() {
+    setState(() {
+      _textDestController.clear();
+      _textNumbController.clear();
+      _textLnthController.clear();
+      _textNameController.clear();
+      dropdownValue1 = null;
+      dropdownValue2 = null;
+      /*startDot = null;
+      bfsPath = null;
+      dfsAccessTable = null;
+      endDot = null;*/
+    });
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    screenSize = MediaQuery.of(context).size.width;
+    _textGrNmController.text = graphData.getName();
+    return MaterialApp(
+        home: Scaffold(
+      appBar: AppBar(
+          title: const Align(
+              alignment: Alignment.topLeft,
+              child: Text("Graph name:\n",
+                  style: TextStyle(
+                    fontSize: 18,
+                    color: Colors.white,
+                  ))),
+          toolbarHeight: 110,
+          flexibleSpace: Container(
+            color: Colors.green.shade900,
+            child: Column(children: <Widget>[
+              const SizedBox(height: 5),
+              Row(children: [
+                addSpaceW(screenSize / 8 + 19),
+                createButton("\nAdd dot\n", addDotPushed),
+                createInputBox("Dot name", screenSize / 4 - 25, Icons.label,
+                    _textNameController),
+                addSpaceW(8),
+                createButton("\nAdd path\n", addPathPushed),
+                createInputBox("Input length", screenSize / 4 - 25,
+                    Icons.arrow_right_alt_outlined, _textLnthController),
+              ]),
+              addSpaceH(3),
+              Row(children: [
+                addSpaceW(6),
+                createInputBox(
+                    "Name", screenSize / 8 - 25, null, _textGrNmController),
+                //addSpaceW(screenSize / 8 - 4),
+                createButton("\nDel dot \n", delDotPushed),
+                //createInputBox("Dot number", screenSize / 4 - 25, Icons.fiber_manual_record, _textNumbController),
+                addSpaceW(54),
+                dropList1(screenSize / 4 - 80),
+                addSpaceW(54),
+                createButton("\nDel path\n", delPathPushed),
+                addSpaceW(54),
+                dropList2(screenSize / 4 - 80),
+                //createInputBox("Destination number", screenSize / 4 - 25, Icons.fiber_manual_record, _textDestController),
+              ]),
+            ]),
+          ),
+          actions: [
+            IconButton(
+              onPressed: () => graphData.flushData(),
+              icon: const Icon(Icons.delete_sweep),
+              iconSize: 60,
+            ),
+          ]),
+      body: CustomPaint(
+        painter: CurvePainter(
+            graphData: graphData,
+            bfsPath: bfsPath,
+            dfsAccessTable: dfsAccessTable,
+            start: startDot,
+            end: endDot),
+        child: Align(
+          alignment: Alignment.topRight,
+          child: ButtonBar(
+            mainAxisSize: MainAxisSize.min,
+            children: <Widget>[
+              createButton("Bfs", bfsPushed),
+              createButton("Dfs", dfsPushed),
+              createButton("Clear dfs or bfs", () {
+                setState(() {
+                  bfsPath = null;
+                  dfsAccessTable = null;
+                  startDot = null;
+                  endDot = null;
+                });
+              }),
+              createButton(graphData.getUseLengthStr(), changeLength),
+              createButton(graphData.getDoubleSidedStr(), changeOriented),
+              /*Text(_textGrNmController.text,
+                  style:
+                      TextStyle(fontSize: 15, color: Colors.blueGrey.shade900)),*/
+              createButton("Save to file", fileSaver),
+              createButton("Load from file", fileOpener),
+              createButton("Help", () {
+                String out =
+                    "   В поле \"Graph name\" можно сменить имя графу.\n";
+                out +=
+                    "   Для добавления точки необходимо ввести имя в \"Dot name\" и нажать на \"Add dot\".\n";
+                out +=
+                    "   Для удаления точки необходимо ввести номер в \"Dot number\" и нажать на \"Del dot\".\n";
+                out +=
+                    "   Для добавления пути необходимо ввести: номер выходной вершины в \"Dot number\", номер входной вершины в \"Destination number\" ";
+                out +=
+                    "и, если граф взвешенный, то ввести длину пути в \"Input length\". Затем нажать \"Add path\".\n";
+                out +=
+                    "   Для удаления пути необходимо ввести номер выходной вершины в \"Dot number\" и номер входной вершины в \"Destination number\". Затем нажать \"Del path\".\n\n";
+                out +=
+                    "   Кнопки \"Bfs\" и \"Dfs\" нумеруют точки в зависимости от послежовательности, в которой они будут пройдены.\n";
+                out +=
+                    "   Кнопки \"Взвешенный\" и \"Ориентированный\" позволяют сменить эти значения перед построением графа (т.е. для их работы граф должен быть пустым).\n";
+                out +=
+                    "   Кнопки \"Save to file\" и \"Load from file\" позволяют вывести информацию в файл и загрузить информацию из файла соответственно.\n";
+                out +=
+                    "   Кнопка \"Help\" описывает работу с интерфейсом программы.";
+                showPopUp("Help:", out);
+              })
+            ],
+          ),
+        ),
+      ),
+    ));
+  }
+
+  // ignore: avoid_types_as_parameter_names, non_constant_identifier_names, use_function_type_syntax_for_parameters
+  ElevatedButton createButton(String txt, void onPressing()) {
+    return ElevatedButton(
+      onPressed: onPressing,
+      style: ButtonStyle(
+          backgroundColor: MaterialStateProperty.resolveWith<Color>(
+              (states) => Colors.green.shade700)),
+      child: Text(txt,
+          style: const TextStyle(
+            fontSize: 15,
+            color: Colors.white70,
+            height: 1,
+          )),
+    );
+  }
+
+  Container createInputBox(String text, double wid, IconData? icon,
+      TextEditingController? controller) {
+    if (icon == null) {
+      return Container(
+          width: wid,
+          height: 40,
+          margin: const EdgeInsets.symmetric(horizontal: 20, vertical: 5),
+          child: TextField(
+            controller: controller,
+            textAlign: TextAlign.center,
+            onChanged: (name) => graphData.setName(name),
+            decoration: InputDecoration(
+                contentPadding:
+                    const EdgeInsets.symmetric(vertical: 10, horizontal: 10),
+                filled: true,
+                fillColor: Colors.white,
+                //prefixIcon: Icon(icon, color: Colors.black),
+                border: const OutlineInputBorder(
+                    borderRadius: BorderRadius.all(Radius.circular(40))),
+                hintStyle: const TextStyle(color: Colors.black38),
+                hintText: text),
+          ));
+    }
+    return Container(
+        width: wid,
+        height: 40,
+        margin: const EdgeInsets.symmetric(horizontal: 20, vertical: 5),
+        child: TextField(
+          controller: controller,
+          textAlign: TextAlign.center,
+          decoration: InputDecoration(
+              contentPadding:
+                  const EdgeInsets.symmetric(vertical: 10, horizontal: 10),
+              filled: true,
+              fillColor: Colors.white,
+              prefixIcon: Icon(icon, color: Colors.black),
+              border: const OutlineInputBorder(
+                  borderRadius: BorderRadius.all(Radius.circular(40))),
+              hintStyle: const TextStyle(color: Colors.black38),
+              hintText: text),
+        ));
+  }
+
+  SizedBox addSpaceH(double h) {
+    return SizedBox(height: h);
+  }
+
+  SizedBox addSpaceW(double w) {
+    return SizedBox(width: w);
+  }
+
+  void showPopUp(String alertTitle, String err) => showDialog<String>(
+        context: context,
+        builder: (BuildContext context) => AlertDialog(
+          title: Text(alertTitle),
+          content: Text(err),
+          actions: <Widget>[
+            TextButton(
+              onPressed: () => Navigator.pop(context, 'OK'),
+              child: const Text('OK'),
+            ),
+          ],
+        ),
+      );
+
+//*********ButtonsFunctions*********
+  void addDotPushed() {
+    //showPopUp("Test", "Test message");
+    //var inp = int.tryParse(_textNameController.text);
+    setState(() {
+      if (_textNameController.text == "") {
+        showPopUp("Error", "No name in \"Dot name\" box");
+      } else {
+        String? res = graphData.addIsolated(_textNameController.text);
+        if (res != null) {
+          showPopUp("Error", res);
+        }
+      }
+      clearInputData();
+    });
+  }
+
+  void addPathPushed() {
+    setState(() {
+      if (dropdownValue1 == null) {
+        showPopUp("Error", "Select output dot");
+      } else if (dropdownValue2 == null) {
+        showPopUp("Error", "select input dot");
+      } else if (_textLnthController.text == "" &&
+          graphData.getUseLengthBool()) {
+        showPopUp("Error", "No length in \"Input length\" box");
+      } else {
+        int? from = int.parse(dropdownValue1!);
+        int? to = int.parse(dropdownValue2!);
+        int? len = int.tryParse(_textLnthController.text);
+        if (len == null && graphData.getUseLengthBool()) {
+          showPopUp("Error",
+              "Can't parse input.\nInts only allowed in \"Dot number\", \"Destination number\" and \"Input length\"");
+        } else {
+          len ??= 0;
+          String? res = graphData.addPath(from, to, len);
+          if (res != null) {
+            showPopUp("Error", res);
+          }
+        }
+      }
+      clearInputData();
+    });
+  }
+
+  void changeOriented() {
+    setState(() {
+      String? res = graphData.flipUseOrientation();
+      if (res != null) showPopUp("Error", res);
+    });
+  }
+
+  void changeLength() {
+    setState(() {
+      String? res = graphData.flipUseLength();
+      if (res != null) showPopUp("Error", res);
+    });
+  }
+
+  void delPathPushed() {
+    setState(() {
+      if (_textNumbController.text == "") {
+        showPopUp("Error", "No number in \"Dot number\" box");
+      } else if (_textDestController.text == "") {
+        showPopUp("Error", "No name in \"Dot name\" box");
+      } else {
+        int? from = int.tryParse(_textNumbController.text);
+        int? to = int.tryParse(_textDestController.text);
+        if (from == null || to == null) {
+          showPopUp("Error",
+              "Can't parse input.\nInts only allowed in \"Dot number\" and \"Destination number\"");
+        } else {
+          String? res = graphData.delPath(from, to);
+          if (res != null) {
+            showPopUp("Error", res);
+          }
+        }
+      }
+      clearInputData();
+    });
+  }
+
+  void delDotPushed() {
+    setState(() {
+      /*if (_textNumbController.text == "") {
+        showPopUp("Error", "No number in \"Dot number\" box");
+      } else {
+        int? dot = int.tryParse(_textNumbController.text);
+        if (dot == null) {
+          showPopUp("Error", "Can't parse input.\nInts only allowed");
+        } else {
+          String? res = graphData.delDot(dot);
+          if (res != null) {
+            showPopUp("Error", res);
+          }
+        }
+      }*/
+      if (dropdownValue1 != null) {
+        graphData.delDot(int.parse(dropdownValue1!));
+      } else {
+        showPopUp("Error", "Nothing in input");
+      }
+      clearInputData();
+    });
+  }
+
+  void fileOpener() async {
+    FilePickerResult? result =
+        await FilePicker.platform.pickFiles(allowedExtensions: ["txt"]);
+    setState(() {
+      if (result != null) {
+        if (!result.files.single.path!.endsWith(".txt")) {
+          showPopUp("Error", "Can open only \".txt\" files");
+        } else {
+          //print(result.files.single.path!);
+          String? res =
+              graphData.replaceDataFromFile(result.files.single.path!);
+          if (res != null) showPopUp("Error", res);
+        }
+      } else {
+        showPopUp("Error", "No file selected");
+        // User canceled the picker
+      }
+    });
+  }
+
+  void fileSaver() async {
+    String? outputFile = await FilePicker.platform.saveFile(
+        dialogTitle: 'Please select an output file:',
+        fileName: 'output-file.txt',
+        allowedExtensions: ["txt"]);
+    if (outputFile == null) {
+      showPopUp("Error", "Save cancelled");
+      // User canceled the picker
+    } else {
+      if (!outputFile.endsWith(".txt")) {
+        outputFile += ".txt";
+      }
+      graphData.printToFile(outputFile);
+    }
+  }
+
+  void bfsPushed() {
+    setState(() {
+      bfsPath = null;
+      dfsAccessTable = null;
+      startDot = null;
+      endDot = null;
+      if (dropdownValue1 == null) {
+        showPopUp("Error", "No number in \"Dot number\" box");
+      } else if (dropdownValue2 == null) {
+        showPopUp("Error", "No number in \"Destination number\" box");
+      } else {
+        startDot = int.parse(dropdownValue1!);
+        endDot = int.parse(dropdownValue2!);
+
+        bfsPath = graphData.bfsPath(startDot!, endDot!);
+        if (bfsPath == null) {
+          showPopUp("Info", "There is no path");
+        }
+        print(bfsPath);
+      }
+    });
+    clearInputData();
+  }
+
+  void dfsPushed() {
+    setState(() {
+      bfsPath = null;
+      dfsAccessTable = null;
+      startDot = null;
+      endDot = null;
+      if (dropdownValue1 == null) {
+        showPopUp("Error", "No number in \"Dot number\" box");
+      } else {
+        startDot = int.parse(dropdownValue1!);
+        dfsAccessTable = graphData.dfsIterative(startDot!);
+        if (dfsAccessTable == null) {
+          showPopUp("Err", "report this error.");
+        }
+        print(dfsAccessTable);
+      }
+      clearInputData();
+    });
+  }
+  //*********ButtonsFunctions*********
+
+  SizedBox dropList1(double width) {
+    var button = DropdownButton(
+      hint: const Text(
+        'Select Dot',
+        style: TextStyle(color: Colors.white, fontSize: 13),
+      ), // Not necessary for Option 1
+      alignment: AlignmentDirectional.centerEnd,
+      value: dropdownValue1,
+
+      isDense: true,
+      borderRadius: const BorderRadius.all(Radius.circular(20)),
+      dropdownColor: Colors.green.shade800,
+      style: const TextStyle(
+        //background: Paint()..color = Colors.white,
+        color: Colors.white,
+        fontSize: 18,
+      ),
+      onChanged: (String? newValue) {
+        setState(() {
+          dropdownValue1 = newValue;
+        });
+      },
+      items: graphData.getDots().map((location) {
+        return DropdownMenuItem(
+          child: Text(location.getName()),
+          value: location.num.toString(),
+        );
+      }).toList(),
+    );
+
+    return SizedBox(
+      child: button,
+      width: width,
+    );
+  }
+
+  SizedBox dropList2(double width) {
+    var button = DropdownButton(
+      hint: const Text(
+        'Select Dot',
+        style: TextStyle(color: Colors.white, fontSize: 13),
+      ), // Not necessary for Option 1
+      alignment: AlignmentDirectional.centerEnd,
+      value: dropdownValue2,
+
+      isDense: true,
+      borderRadius: const BorderRadius.all(Radius.circular(20)),
+      dropdownColor: Colors.green.shade800,
+      style: const TextStyle(
+        //background: Paint()..color = Colors.white,
+        color: Colors.white,
+        fontSize: 18,
+      ),
+      onChanged: (String? newValue) {
+        setState(() {
+          dropdownValue2 = newValue;
+        });
+      },
+      items: graphData.getDots().map((location) {
+        return DropdownMenuItem(
+          child: Text(location.getName()),
+          value: location.num.toString(),
+        );
+      }).toList(),
+    );
+
+    return SizedBox(
+      child: button,
+      width: width,
+    );
+  }
+}

flutter/lib/graph.dart

@@ -0,0 +1,679 @@
+import 'dart:io';
+
+class Separators {
+  static const String dotToConnections = ": ";
+  static const String dotToLength = "|";
+  static const String space = " ";
+  static const String hasLength = "Взвешенный";
+  static const String hasNoLength = "НеВзвешенный";
+  static const String isOriented = "Ориентированный";
+  static const String isNotOriented = "НеОриентированный";
+  static const String nL = "\n";
+  static const String end = "END";
+
+  Separators();
+}
+
+class Dot {
+  //Data
+  // ignore: prefer_final_fields
+  String _name = "";
+  int num = -1;
+  Map<int, int> _ln = <int, int>{};
+
+  //****Get****
+  String getName() => _name;
+  bool hasConnection(int n) => _ln.containsKey(n);
+  Map<int, int> getL() => _ln;
+
+  int getLength(int x) {
+    if (hasConnection(x)) {
+      return _ln[x]!;
+    }
+    return -1;
+  }
+  //****Get****
+
+  //Set
+  void setName(String n) => _name = n;
+
+  //Add
+  void addPath(int inp, int length) => _ln[inp] = length;
+
+  //Del
+  void delPath(int n) => _ln.removeWhere((key, value) =>
+      key == n); // удалить обратный путь если не ориентированный
+
+  //Print
+  void printD() {
+    stdout.write("$_name: №$num => ");
+    for (var i in _ln.keys) {
+      stdout.write("$i|${_ln[i]} ");
+    }
+    stdout.write("\n");
+  }
+
+  //******Constructor******
+  Dot([String name = "Undefined", int n = -1]) {
+    _name = name;
+    num = n;
+    _ln = <int, int>{};
+  }
+  Dot.fromTwoLists(String name, List<int> num0, List<int> length,
+      [int n = -1]) {
+    _name = name;
+    num = n;
+    Map<int, int> nw = <int, int>{};
+    if (num0.length != length.length) {
+      print("Error in lists");
+    } else {
+      for (var i = 0; i < num0.length; i++) {
+        nw[num0[i]] = length[i];
+        _ln = nw;
+      }
+    }
+  }
+  Dot.fromMap(String name, Map<int, int> l, [int n = -1]) {
+    _name = name;
+    num = n;
+    _ln = l;
+  }
+  //******Constructor******
+
+  //Copy
+  Dot.clone(Dot a) {
+    _name = a.getName();
+    num = a.num;
+    _ln = a.getL();
+  }
+}
+
+class Graphs {
+  //Data
+  String _name = "Undefined"; //Имя
+  int _amount = 0; //Количество вершин
+  List<Dot> _dots = <Dot>[]; //Список смежности вершин
+  Map<int, String> _nameTable = <int, String>{}; //Список вершин по именам
+  bool _useLength = false; //Взвешенность
+  bool _oriented = false; //Ориентированность
+
+  //*********************Add************************
+  String? addDot(Dot a) {
+    if (getNumByName(a.getName()) != null) {
+      return ("Dot name \"${a.getName()}\" already in use. Change name or use addPath");
+    }
+    _amount++;
+    a.num = _amount;
+    _dots.add(a);
+    _syncNameTable();
+    checkDots(false);
+    if (!_oriented) _fullFix();
+    return null;
+  }
+
+  bool addDotFromToLists(String name, List<int> num0, List<int> length,
+      [int n = -1]) {
+    var a = Dot.fromTwoLists(name, num0, length, n);
+    if (getNumByName(a.getName()) != null) {
+      print(
+          "Dot name ${a.getName()} already in use. Change name or use addPath");
+      return false;
+    }
+    _amount++;
+    a.num = _amount;
+    _dots.add(a);
+    _syncNameTable();
+    checkDots(false);
+    if (!_oriented) _fixPathAfterInsert(a);
+    return true;
+  }
+
+  String? addIsolated(String name) {
+    var res = addDot(Dot.fromTwoLists(name, [], []));
+    _syncNameTable();
+    return res;
+  }
+
+  String? addPath(int from, int to, [int len = 0]) {
+    if (from <= 0 || from > _amount || to <= 0 && to > _amount) {
+      return "Index out of range. Have dots 1..$_amount";
+    }
+    _dots[from - 1].addPath(to, len);
+    if (!_oriented) {
+      _dots[to - 1].addPath(from, len);
+    }
+    return null;
+  }
+  //*********************Add************************
+
+  //*********Delete*********
+  String? delPath(int from, int to) {
+    if (from <= 0 || from > _amount || to <= 0 && to > _amount) {
+      return "Can't find specified path";
+    }
+    _dots[from - 1].delPath(to);
+    if (!_oriented) {
+      _dots[to - 1].delPath(from);
+    }
+    return null;
+  }
+
+  String? delDot(int inn) {
+    if (inn > _amount || inn < 1) {
+      return "Index out of range. Allowed 1..$_amount";
+    }
+    List<int> toDel = <int>[];
+    for (int i in _dots[inn - 1].getL().keys) {
+      toDel.add(i);
+    }
+    for (int i in toDel) {
+      delPath(i, inn);
+    }
+    _dots.removeAt(inn - 1);
+    _syncNum();
+    _syncNameTable();
+    _fixAfterDel(inn);
+    return null;
+  }
+
+  void flushData() {
+    _dots = <Dot>[];
+    _amount = 0;
+    _nameTable = <int, String>{};
+  }
+  //*********Delete*********
+
+  //******Helper*******
+  bool checkDots([bool verbose = false]) {
+    for (var a in _dots) {
+      for (var i in a.getL().keys) {
+        try {
+          if (!_dots[i - 1].getL().containsKey(a.num)) {
+            if (verbose) print("Can't find ${a.num}");
+            return false;
+          }
+        } catch (e) {
+          if (verbose) {
+            print("Can't find Dot $i for path ${a.num}->$i. Exception $e");
+          }
+          _dots[a.num - 1].getL().remove(i);
+          return false;
+        }
+      }
+    }
+    return true;
+  }
+
+  void _fixAfterDel(int inn) {
+    for (int i = 0; i < _dots.length; i++) {
+      Map<int, int> l = <int, int>{};
+      for (int j in _dots[i].getL().keys) {
+        if (j >= inn) {
+          l[j - 1] = _dots[i].getL()[j]!;
+        } else {
+          l[j] = _dots[i].getL()[j]!;
+        }
+      }
+      _dots[i] = Dot.fromMap(_dots[i].getName(), l, _dots[i].num);
+    }
+  }
+
+  void _fixPathAfterInsert(Dot a) {
+    //Для неориентированного
+    for (var i in a.getL().keys) {
+      if (!_dots[i - 1].getL().containsKey(a.num)) {
+        addPath(i, a.num, a.getL()[i]!);
+      }
+    }
+  }
+
+  void _fullFix() {
+    for (var i in _dots) {
+      _fixPathAfterInsert(i);
+    }
+  }
+
+  void _syncNameTable() {
+    _nameTable = <int, String>{};
+    for (var i in _dots) {
+      _nameTable[i.num] = i.getName();
+    }
+  }
+
+  void _syncNum() {
+    _amount = 0;
+    for (var i in _dots) {
+      i.num = ++_amount;
+    }
+    _syncNameTable();
+  }
+  //******Helper*******
+
+  //*****Setters*******
+  void setName(String name) => _name = name;
+  String? flipUseOrientation() {
+    if (_amount != 0) {
+      return "Can change use of orientation only in empty graph";
+    }
+    _oriented = !_oriented;
+    return null;
+  }
+
+  String? flipUseLength() {
+    if (_amount != 0) {
+      return "Can change use of length only in empty graph";
+    }
+    _useLength = !_useLength;
+    return null;
+  }
+
+  String? replaceDataFromFile(String path) {
+    File file = File(path);
+    List<String> lines = file.readAsLinesSync();
+    if (lines.length < 3) {
+      return "Not enough lines in file";
+    }
+    String name = lines.removeAt(0);
+    bool oriented;
+    switch (lines.removeAt(0)) {
+      case Separators.isOriented:
+        oriented = true;
+        break;
+      case Separators.isNotOriented:
+        oriented = false;
+        break;
+      default:
+        return "Error on parsing \"IsOriented\"";
+    }
+    bool useLength;
+    switch (lines.removeAt(0).trim()) {
+      case Separators.hasLength:
+        useLength = true;
+        break;
+      case Separators.hasNoLength:
+        useLength = false;
+        break;
+      default:
+        return "Error on parsing \"HasLength\"";
+    }
+    List<Dot> dots = <Dot>[];
+    for (var l in lines) {
+      l = l.trimRight();
+      if (l != Separators.end) {
+        var spl = l.split(Separators.space);
+        List<int> dot = <int>[];
+        List<int> len = <int>[];
+        String name = spl.removeAt(0);
+        name = name.substring(0, name.length - 1);
+        for (var splitted in spl) {
+          if (splitted != "") {
+            var dt = splitted.split(Separators.dotToLength);
+            if (dt.length == 2) {
+              int? parsed = int.tryParse(dt[0]);
+              if (parsed == null) {
+                return "Error while parsing file\nin parsing int in \"${dt[0]}\"";
+              }
+              dot.add(parsed);
+              if (useLength) {
+                parsed = int.tryParse(dt[1]);
+                if (parsed == null) {
+                  return "Error while parsing file\nin parsing int in \"${dt[1]}\"";
+                }
+                len.add(parsed);
+              } else {
+                len.add(0);
+              }
+            } else if (dt.length == 1) {
+              int? parsed = int.tryParse(splitted);
+              if (parsed == null) {
+                return "Error while parsing file\nin parsing int in \"$splitted\"";
+              }
+              dot.add(parsed);
+              len.add(0);
+            }
+          }
+        }
+        dots.add(Dot.fromTwoLists(name, dot, len));
+      }
+    }
+    _name = name;
+    _oriented = oriented;
+    _useLength = useLength;
+    _dots = dots;
+    _syncNum();
+    _syncNameTable();
+    if (!_oriented) _fullFix();
+    return null;
+  }
+  //*****Setters*******
+
+  //*****Getters*******
+  bool getDoubleSidedBool() => _oriented;
+  String getDoubleSidedStr() {
+    if (_oriented) return Separators.isOriented;
+    return Separators.isNotOriented;
+  }
+
+  bool getUseLengthBool() => _useLength;
+  String getUseLengthStr() {
+    if (_useLength) return Separators.hasLength;
+    return Separators.hasNoLength;
+  }
+
+  List<Dot> getDots() => _dots;
+  String getName() => _name;
+  String? getNameByNum(int n) => _nameTable[n];
+  Map<int, String> getNameTable() => _nameTable;
+  int getDotAmount() => _dots.length;
+  int? getNumByName(String n) {
+    for (var i in _nameTable.keys) {
+      if (_nameTable[i] == n) return i;
+    }
+    return null;
+  }
+
+  List<List<int>>? getLenTable() {
+    List<List<int>>? out = <List<int>>[];
+    for (int i = 0; i < _amount; i++) {
+      List<int> xx = <int>[];
+      for (int j = 1; j <= _amount; j++) {
+        xx.add(_dots[i].getLength(j));
+      }
+      out.add(xx);
+    }
+    return out;
+  }
+
+  List<List<int>>? getPathTable() {
+    List<List<int>>? out = <List<int>>[];
+    for (int i = 0; i < _amount; i++) {
+      List<int> xx = <int>[];
+      for (int j = 1; j <= _amount; j++) {
+        if (_dots[i].getLength(j) != -1) {
+          xx.add(i);
+        } else {
+          xx.add(-1);
+        }
+      }
+      out.add(xx);
+    }
+    return out;
+  }
+
+  /*List<Dot> getNoRepeatDots() {
+    List<Dot> ret = <Dot>[];
+    for (int i = 0; i < _amount; i++) {
+      ret.add(Dot(_dots[i].getName(), _dots[i].num));
+    }
+    for (int i = 0; i < _amount; i++) {
+      for (int j in _dots[i].getL().keys) {
+        if (!ret[j - 1].hasConnection(i + 1) && !ret[i].hasConnection(j) ||
+            i == j) {
+          var len = _dots[i].getLength(j);
+          ret[i].addPath(j, len);
+        }
+      }
+    }
+    return ret;
+  }*/
+  //*****Getters*******
+
+  //******Print******
+  void printG() {
+    stdout.write("$_name: ");
+    if (_oriented) {
+      stdout.write("Ориентированный, ");
+    } else {
+      stdout.write("Не ориентированный, ");
+    }
+    if (_useLength) {
+      print("Взвешенный");
+    } else {
+      print("Не взвешенный");
+    }
+    for (var i in _dots) {
+      i.printD();
+    }
+  }
+
+  void printToFile(String name) {
+    var file = File(name);
+    file.writeAsStringSync("$_name\n");
+    if (_oriented) {
+      file.writeAsStringSync("${Separators.isOriented}\n",
+          mode: FileMode.append);
+    } else {
+      file.writeAsStringSync("${Separators.isNotOriented}\n",
+          mode: FileMode.append);
+    }
+    if (_useLength) {
+      file.writeAsStringSync("${Separators.hasLength}\n",
+          mode: FileMode.append);
+    } else {
+      file.writeAsStringSync("${Separators.hasNoLength}\n",
+          mode: FileMode.append);
+    }
+    for (int i = 0; i < _amount; i++) {
+      file.writeAsStringSync((i + 1).toString() + Separators.dotToConnections,
+          mode: FileMode.append);
+      var d = _dots[i].getL();
+      for (var j in d.keys) {
+        file.writeAsStringSync(
+            j.toString() + Separators.dotToLength + d[j].toString() + " ",
+            mode: FileMode.append);
+      }
+      file.writeAsStringSync(Separators.nL, mode: FileMode.append);
+    }
+    file.writeAsStringSync(Separators.end, mode: FileMode.append);
+  }
+  //******Print******
+
+  //*******Constructor********
+  Graphs(
+      [String name = "Undefined",
+      bool hasLen = false,
+      bool isOriented = false]) {
+    _name = name;
+    _dots = <Dot>[];
+    _useLength = hasLen;
+    _oriented = isOriented;
+    _amount = 0;
+    _nameTable = <int, String>{};
+  }
+  Graphs.fromList(String name, List<Dot> dots, bool hasLen, bool oriented) {
+    _name = name;
+    _dots = dots;
+    _useLength = hasLen;
+    _amount = _dots.length;
+    _oriented = oriented;
+    _syncNum();
+    if (!_oriented) _fullFix();
+  }
+  Graphs.fromFile(String path) {
+    replaceDataFromFile(path);
+    /*File file = File(path);
+    List<String> lines = file.readAsLinesSync();
+    _name = lines.removeAt(0);
+    _oriented = lines.removeAt(0) == Separators.isOriented.trim();
+    _useLength = lines.removeAt(0) == Separators.hasLength.trim();
+    _dots = <Dot>[];
+    for (var l in lines) {
+      if (l != Separators.end) {
+        var spl = l.split(Separators.space);
+        List<int> dot = <int>[];
+        List<int> len = <int>[];
+        String name = spl.removeAt(0);
+        name = name.substring(0, name.length - 1);
+        for (var splitted in spl) {
+          var dt = splitted.split(Separators.dotToLength);
+          if (dt.length == 2) {
+            dot.add(int.parse(dt[0]));
+            if (_useLength) {
+              len.add(int.parse(dt[1]));
+            } else {
+              len.add(0);
+            }
+          } else if (dt.length == 1) {
+            dot.add(int.parse(splitted));
+            len.add(0);
+          }
+        }
+        _dots.add(Dot.fromTwoLists(name, dot, len));
+      }
+    }
+    _syncNum();
+    _syncNameTable();
+    if (!_oriented) _fullFix();*/
+  }
+  //*******Constructor********
+
+  //Copy
+  Graphs.clone(Graphs a) {
+    _name = a.getName();
+    _dots = a.getDots();
+    _oriented = a.getDoubleSidedBool();
+    _useLength = a.getUseLengthBool();
+    _amount = _dots.length;
+    _syncNameTable();
+  }
+
+  //************Алгоритмы************
+  /* bool bfsHasPath(int startDot, int goalDot) {
+    // обход в ширину
+    startDot--;
+    goalDot--;
+    List<bool> visited = <bool>[];
+    List<int> queue = <int>[];
+    for (int i = 0; i < _amount; i++) {
+      visited.add(false);
+    } // изначально список посещённых узлов пуст
+    queue.add(startDot); // начиная с узла-источника
+    visited[startDot] = true;
+    while (queue.isNotEmpty) {
+      // пока очередь не пуста
+      int node = queue.removeAt(0); // извлечь первый элемент в очереди
+      if (node == goalDot) {
+        return true; // проверить, не является ли текущий узел целевым
+      }
+      for (int child in _dots[node].getL().keys) {
+        // все преемники текущего узла, ...
+        if (!visited[child - 1]) {
+          // ... которые ещё не были посещены ...
+          queue.add(child - 1); // ... добавить в конец очереди...
+          visited[child - 1] = true; // ... и пометить как посещённые
+        }
+      }
+    }
+    return false; // Целевой узел недостижим
+  }*/
+
+  List<int>? bfsPath(int startDot, int goalDot) {
+    if (startDot == goalDot) return [startDot];
+    //if (!bfsHasPath(startDot, goalDot)) return null;
+    startDot--;
+    goalDot--;
+    List<List<int>>? graph = getLenTable();
+    List<bool> used = <bool>[];
+    List<int> dst = <int>[];
+    List<int> pr = <int>[];
+
+    for (int i = 0; i < _amount; i++) {
+      dst.add(-1);
+      used.add(false);
+      pr.add(0);
+    }
+
+    List<int> q = <int>[];
+    q.add(startDot);
+    used[startDot] = true;
+    dst[startDot] = 0;
+    pr[startDot] =
+        -1; //Пометка, означающая, что у вершины startDot нет предыдущей.
+
+    while (q.isNotEmpty) {
+      int cur = q.removeAt(0);
+      int x = 0;
+      for (int neighbor in graph![cur]) {
+        if (neighbor != -1) {
+          if (!used[x]) {
+            q.add(x);
+            used[x] = true;
+            dst[x] = dst[cur] + 1;
+            pr[x] = cur; //сохранение предыдущей вершины
+          }
+        }
+        x++;
+      }
+    }
+
+    //Восстановим кратчайший путь
+    //Для восстановления пути пройдём его в обратном порядке, и развернём.
+    List<int> path = <int>[];
+
+    int cur = goalDot; //текущая вершина пути
+    path.add(cur + 1);
+
+    while (pr[cur] != -1) {
+      //пока существует предыдущая вершина
+      cur = pr[cur]; //переходим в неё
+      path.add(cur + 1); //и дописываем к пути
+    }
+
+    path = path.reversed.toList();
+
+    //print("Shortest path between vertices ${startDot+1} and ${goalDot+1} is: $path");
+    if (path[0] == (startDot + 1) &&
+        path[1] == (goalDot + 1) &&
+        !_dots[startDot].hasConnection(goalDot + 1)) return null;
+    return path;
+  }
+
+  List<bool>? dfsIterative(int v) {
+    v--;
+    //List<int>? pos = <int>[];
+    List<bool> label = <bool>[];
+    for (int i = 0; i < _amount; i++) {
+      label.add(false);
+    }
+    List<int> stack = <int>[];
+    stack.add(v);
+    //pos.add(v);
+    while (stack.isNotEmpty) {
+      v = stack.removeLast();
+      if (!label[v]) {
+        label[v] = true;
+        for (int i in _dots[v].getL().keys) {
+          stack.add(i - 1);
+          //pos.add(i);
+        }
+      }
+    }
+    //print(pos);
+    return label;
+  }
+
+  void dijkstra(int source) {
+    /*
+      create vertex set Q;
+
+      for each vertex v in Graph{            
+          dist[v] ← INFINITY ;                
+          prev[v] ← UNDEFINED  ;            
+          add v to Q;}                     
+      dist[source] ← 0;                       
+     
+      while Q is not empty{
+         u ← vertex in Q with min dist[u]   
+                                             
+          remove u from Q
+         
+          for each neighbor v of u still in Q{
+              alt ← dist[u] + length(u, v);
+              if alt < dist[v]:  {            
+                  dist[v] ← alt;
+                  prev[v] ← u;}
+  }}
+      return dist[], prev[]*/
+  }
+  //************Алгоритмы************
+}