Загрузил(а) файлы в 'flutter/lib'
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import 'package:arrow_path/arrow_path.dart';
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import 'package:graphs/src/graph.dart';
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import 'package:flutter/material.dart';
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import 'dart:math';
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class CurvePainter extends CustomPainter {
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CurvePainter({
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Key? key,
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required this.graphData,
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required this.bfsPath,
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required this.start,
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required this.end,
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required this.dfsAccessTable,
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});
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List<int>? bfsPath;
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List<bool>? dfsAccessTable;
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int? start;
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int? end;
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Graphs graphData;
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final double _dotRad = 6;
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final double _lineWidth = 1.5;
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final Color _lineColor = Colors.black;
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final double _aboveHeight = 5;
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double _circleRad = 100;
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final TextStyle _textStyle = TextStyle(
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color: Colors.red.shade900,
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decorationColor: Colors.green.shade900,
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decorationThickness: 10,
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decorationStyle: TextDecorationStyle.dashed,
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fontSize: 20,
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);
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Map<int, Offset> _off = <int, Offset>{};
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void _drawLine(Canvas canvas, Offset p1, Offset p2) {
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Paint p = Paint();
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p.color = _lineColor;
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p.strokeWidth = _lineWidth;
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canvas.drawLine(p1, p2, p);
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}
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void _drawDot(Canvas canvas, Offset p1, [double plusRad = 0, Color? col]) {
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col ??= Colors.yellow.shade900;
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var p = Paint();
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p.color = col;
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p.strokeWidth = _lineWidth + 2;
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canvas.drawCircle(p1, _dotRad + plusRad, p);
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}
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void _drawSelfConnect(Canvas canvas, Offset p1) {
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var p = Paint();
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p.color = _lineColor;
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p.strokeWidth = _lineWidth;
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p.style = PaintingStyle.stroke;
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canvas.drawCircle(Offset(p1.dx + _dotRad + 20, p1.dy), _dotRad + 20, p);
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}
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TextSpan _getTextSpan(String s) => TextSpan(text: s, style: _textStyle);
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TextPainter _getTextPainter(String s) => TextPainter(
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text: _getTextSpan(s),
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textDirection: TextDirection.ltr,
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textAlign: TextAlign.center);
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void _drawDotNames(Canvas canvas, Offset place, String s) {
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var textPainter = _getTextPainter(s);
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textPainter.layout();
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textPainter.paint(
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canvas,
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Offset((place.dx - textPainter.width),
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(place.dy - textPainter.height) - _aboveHeight));
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}
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void _drawDotNum(Canvas canvas, Offset size, String s) {
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var textPainter = TextPainter(
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text: TextSpan(
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text: s,
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style: const TextStyle(
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color: Colors.black,
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fontSize: 17,
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)),
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textDirection: TextDirection.ltr,
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textAlign: TextAlign.center);
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textPainter.layout();
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textPainter.paint(
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canvas,
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Offset((size.dx - textPainter.width) + 25,
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(size.dy - textPainter.height) + _aboveHeight + 30));
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}
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int _getHighInputConnections() {
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if (graphData.getDots().length != 1 && graphData.getDots().length <= 3) {
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return -1;
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}
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int higest = -1;
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for (var i in graphData.getDots()) {
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if (i.getL().length > higest) higest = i.num;
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}
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return higest;
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}
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Map<int, Offset> _getDotPos(int dotsAm, Size size) {
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Map<int, Offset> off = <int, Offset>{};
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var width = size.width / 2;
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var height = size.height / 2;
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int add = 0;
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int h = _getHighInputConnections();
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for (int i = 0; i < dotsAm; i++) {
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if ((i + 1) != h) {
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double x =
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cos(2 * pi * (i - add) / (dotsAm - add)) * _circleRad + width;
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double y =
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sin(2 * pi * (i - add) / (dotsAm - add)) * _circleRad + height;
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off[i + 1] = Offset(x, y);
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} else if ((i + 1) == h) {
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off[i + 1] = Offset(width + 2, height - 2);
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add = 1;
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h = 0;
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} else {
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print("GetDotPos error");
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}
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//print(off.length);
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}
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//print(off);
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return off;
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}
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void _drawHArrow(Canvas canvas, Size size, Offset from, Offset to,
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[bool doubleSided = false]) {
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Path path;
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// The arrows usually looks better with rounded caps.
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Paint paint = Paint()
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..color = Colors.black
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..style = PaintingStyle.stroke
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..strokeCap = StrokeCap.round
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..strokeJoin = StrokeJoin.round
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..strokeWidth = _lineWidth;
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var length = sqrt((to.dx - from.dx) * (to.dx - from.dx) +
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(to.dy - from.dy) * (to.dy - from.dy));
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/// Draw a single arrow.
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path = Path();
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path.moveTo(from.dx, from.dy);
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path.relativeCubicTo(
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0,
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0,
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-(from.dx + to.dx + length) / (length) - 40,
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-(from.dy + to.dy + length) / (length) - 40,
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to.dx - from.dx,
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to.dy - from.dy);
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path =
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ArrowPath.make(path: path, isDoubleSided: doubleSided, tipLength: 16);
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canvas.drawPath(path, paint);
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}
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void _drawHighArrow(Canvas canvas, Size size, Offset from, Offset to,
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[bool doubleSided = false]) {
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Path path;
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// The arrows usually looks better with rounded caps.
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Paint paint = Paint()
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..color = Colors.black
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..style = PaintingStyle.stroke
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..strokeCap = StrokeCap.round
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..strokeJoin = StrokeJoin.round
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..strokeWidth = _lineWidth;
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var length = sqrt((to.dx - from.dx) * (to.dx - from.dx) +
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(to.dy - from.dy) * (to.dy - from.dy));
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/// Draw a single arrow.
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path = Path();
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path.moveTo(from.dx, from.dy);
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path.relativeCubicTo(
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0,
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0,
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(from.dx + to.dx) / (length * 2) + 40,
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(from.dy + to.dy) / (length * 2) + 40,
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to.dx - from.dx,
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to.dy - from.dy);
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path = ArrowPath.make(
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path: path,
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isDoubleSided: doubleSided,
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tipLength: 13,
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isAdjusted: false);
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canvas.drawPath(path, paint);
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}
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void _drawConnections(
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Canvas canvas, Size size, List<Dot> dots, Map<int, Offset> off) {
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for (var i in dots) {
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var list = i.getL();
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var beg = off[i.num];
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for (var d in list.keys) {
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if (d == i.num) {
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_drawSelfConnect(canvas, off[d]!);
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} else {
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if (graphData.getDoubleSidedBool()) {
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if (d > i.num) {
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_drawHArrow(canvas, size, beg!, off[d]!, false);
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if (graphData.getUseLengthBool()) {
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_drawDotNames(
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canvas,
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Offset((off[d]!.dx + beg.dx) / 2 - 18,
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(off[d]!.dy + beg.dy) / 2 - 18),
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i.getL()[d].toString());
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}
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} else {
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_drawHighArrow(canvas, size, beg!, off[d]!, false);
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if (graphData.getUseLengthBool()) {
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_drawDotNames(
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canvas,
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Offset((off[d]!.dx + beg.dx) / 2 + 30,
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(off[d]!.dy + beg.dy) / 2 + 30),
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i.getL()[d].toString());
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}
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}
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} else {
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_drawLine(canvas, beg!, off[d]!);
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if (graphData.getUseLengthBool()) {
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_drawDotNames(
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canvas,
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Offset((off[d]!.dx + beg.dx) / 2, (off[d]!.dy + beg.dy) / 2),
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i.getL()[d].toString());
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}
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}
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}
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}
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}
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}
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void _drawBFS(Canvas canvas) {
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if (bfsPath != null) {
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for (int i = 0; i < bfsPath!.length; i++) {
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_drawDot(canvas, _off[bfsPath![i]]!, 8, Colors.yellow);
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}
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_drawDot(canvas, _off[start]!, 9, Colors.green);
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_drawDot(canvas, _off[end]!, 7, Colors.red.shade200);
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for (int i = 0; i < bfsPath!.length; i++) {
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_drawDotNum(canvas, _off[bfsPath![i]]!, "bfs: №${i + 1}");
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}
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}
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}
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void _drawDFS(Canvas canvas) {
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if (dfsAccessTable != null) {
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for (int i = 0; i < dfsAccessTable!.length; i++) {
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if (dfsAccessTable![i]) {
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_drawDot(canvas, _off[i + 1]!, 8, Colors.green.shade500);
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_drawDotNum(canvas, _off[i + 1]!, "dfs: visible");
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} else {
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_drawDot(canvas, _off[i + 1]!, 7, Colors.red.shade500);
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_drawDotNum(canvas, _off[i + 1]!, "dfs: not visible");
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}
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}
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_drawDot(canvas, _off[start]!, 9, Colors.green.shade900);
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}
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}
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@override
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void paint(Canvas canvas, Size size) {
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if (size.width > size.height) {
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_circleRad = size.height / 3;
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} else {
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_circleRad = size.width / 3;
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}
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_off = _getDotPos(graphData.getDotAmount(), size); //, higest);
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for (int i in _off.keys) {
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_drawDot(canvas, _off[i]!);
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//drawDotNames(canvas, off[i]!, "${graphData.getDots()[i - 1].getName()}:[$i]");
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}
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var g = graphData.getDots();
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_drawBFS(canvas);
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_drawDFS(canvas);
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_drawConnections(canvas, size, g, _off);
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//pringArr(canvas, size);
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//drawArrow(canvas, Offset(size.width / 2, size.height / 2),
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// Offset(size.width / 2 + 50, size.height / 2 + 200));
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//}
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for (int i in _off.keys) {
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//drawDot(canvas, off[i]!);
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_drawDotNames(
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canvas, _off[i]!, "${graphData.getDots()[i - 1].getName()}:[$i]");
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}
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}
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@override
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bool shouldRepaint(CustomPainter oldDelegate) {
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return true;
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}
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}
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/*void _pringArr(Canvas canvas, Size size) {
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TextSpan textSpan;
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TextPainter textPainter;
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Path path;
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// The arrows usually looks better with rounded caps.
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Paint paint = Paint()
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..color = Colors.black
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..style = PaintingStyle.stroke
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..strokeCap = StrokeCap.round
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..strokeJoin = StrokeJoin.round
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..strokeWidth = 3.0;
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/// Draw a single arrow.
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path = Path();
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path.moveTo(size.width * 0.25, size.height * 0.10);
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path.relativeCubicTo(0, 0, size.width * 0.25, 50, size.width * 0.5, 0);
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path = ArrowPath.make(path: path);
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canvas.drawPath(path, paint..color = Colors.blue);
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textSpan = const TextSpan(
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text: 'Single arrow',
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style: TextStyle(color: Colors.blue),
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);
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textPainter = TextPainter(
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text: textSpan,
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textAlign: TextAlign.center,
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textDirection: TextDirection.ltr,
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);
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textPainter.layout(minWidth: size.width);
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textPainter.paint(canvas, Offset(0, size.height * 0.06));
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}*/
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