Загрузил(а) файлы в 'flutter/lib/src'
This commit is contained in:
parent
8fea8c95fc
commit
6fc7bbb2e5
|
|
@ -0,0 +1,333 @@
|
|||
import 'package:arrow_path/arrow_path.dart';
|
||||
import 'package:graphs/src/graph.dart';
|
||||
import 'package:flutter/material.dart';
|
||||
import 'dart:math';
|
||||
|
||||
class Operations {
|
||||
static const String bfs = "bfs";
|
||||
static const String dfs = "dfs";
|
||||
static const String dijkstra = "djkstr";
|
||||
static const String none = "none";
|
||||
}
|
||||
|
||||
class CurvePainter extends CustomPainter {
|
||||
CurvePainter({
|
||||
Key? key,
|
||||
required this.graphData,
|
||||
required this.intListPath,
|
||||
required this.dfsAccessTable,
|
||||
required this.start,
|
||||
required this.end,
|
||||
required this.op,
|
||||
});
|
||||
|
||||
List<int?>? intListPath;
|
||||
List<bool>? dfsAccessTable;
|
||||
String op;
|
||||
int? start;
|
||||
int? end;
|
||||
Graphs graphData;
|
||||
final double _dotRad = 7;
|
||||
final double _lineWidth = 1.5;
|
||||
final Color _lineColor = Colors.black;
|
||||
final double _aboveHeight = 5;
|
||||
double _circleRad = 100;
|
||||
final TextStyle _textStyle = TextStyle(
|
||||
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) {
|
||||
Paint p = Paint();
|
||||
p.color = _lineColor;
|
||||
p.strokeWidth = _lineWidth;
|
||||
canvas.drawLine(p1, p2, p);
|
||||
}
|
||||
|
||||
void _drawDot(Canvas canvas, Offset p1, [double plusRad = 0, Color? col]) {
|
||||
col ??= Colors.yellow.shade900;
|
||||
var p = Paint();
|
||||
p.color = col;
|
||||
p.strokeWidth = _lineWidth + 2;
|
||||
canvas.drawCircle(p1, _dotRad + plusRad, p);
|
||||
}
|
||||
|
||||
void _drawSelfConnect(Canvas canvas, Offset p1) {
|
||||
var p = Paint();
|
||||
p.color = _lineColor;
|
||||
p.strokeWidth = _lineWidth;
|
||||
p.style = PaintingStyle.stroke;
|
||||
canvas.drawCircle(Offset(p1.dx + _dotRad + 20, p1.dy), _dotRad + 20, p);
|
||||
}
|
||||
|
||||
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) {
|
||||
var textPainter = _getTextPainter(s);
|
||||
textPainter.layout();
|
||||
textPainter.paint(
|
||||
canvas,
|
||||
Offset((place.dx - textPainter.width),
|
||||
(place.dy - textPainter.height) - _aboveHeight));
|
||||
}
|
||||
|
||||
void _drawDotNum(Canvas canvas, Offset size, String 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) + 25,
|
||||
(size.dy - textPainter.height) + _aboveHeight + 30));
|
||||
}
|
||||
|
||||
int _getHighInputConnections() {
|
||||
if (graphData.getDots().length != 1 && graphData.getDots().length <= 3) {
|
||||
return -1;
|
||||
}
|
||||
int higest = -1;
|
||||
for (var i in graphData.getDots()) {
|
||||
if (i.getL().length > higest) higest = i.num;
|
||||
}
|
||||
return higest;
|
||||
}
|
||||
|
||||
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();
|
||||
for (int i = 0; i < dotsAm; i++) {
|
||||
if ((i + 1) != h) {
|
||||
double x =
|
||||
cos(2 * pi * (i - add) / (dotsAm - add)) * _circleRad + width;
|
||||
double y =
|
||||
sin(2 * pi * (i - add) / (dotsAm - add)) * _circleRad + height;
|
||||
|
||||
off[i + 1] = Offset(x, y);
|
||||
} else if ((i + 1) == h) {
|
||||
off[i + 1] = Offset(width + 2, height - 2);
|
||||
add = 1;
|
||||
h = 0;
|
||||
} else {
|
||||
print("GetDotPos error");
|
||||
}
|
||||
//print(off.length);
|
||||
}
|
||||
|
||||
//print(off);
|
||||
return off;
|
||||
}
|
||||
|
||||
void _drawHArrow(Canvas canvas, Size size, Offset from, Offset to,
|
||||
[bool doubleSided = false]) {
|
||||
Path path;
|
||||
|
||||
// The arrows usually looks better with rounded caps.
|
||||
Paint paint = Paint()
|
||||
..color = Colors.black
|
||||
..style = PaintingStyle.stroke
|
||||
..strokeCap = StrokeCap.round
|
||||
..strokeJoin = StrokeJoin.round
|
||||
..strokeWidth = _lineWidth;
|
||||
|
||||
var length = sqrt((to.dx - from.dx) * (to.dx - from.dx) +
|
||||
(to.dy - from.dy) * (to.dy - from.dy));
|
||||
|
||||
/// Draw a single arrow.
|
||||
path = Path();
|
||||
path.moveTo(from.dx, from.dy);
|
||||
path.relativeCubicTo(
|
||||
0,
|
||||
0,
|
||||
-(from.dx + to.dx + length) / (length) - 40,
|
||||
-(from.dy + to.dy + length) / (length) - 40,
|
||||
to.dx - from.dx,
|
||||
to.dy - from.dy);
|
||||
path =
|
||||
ArrowPath.make(path: path, isDoubleSided: doubleSided, tipLength: 16);
|
||||
canvas.drawPath(path, paint);
|
||||
}
|
||||
|
||||
void _drawHighArrow(Canvas canvas, Size size, Offset from, Offset to,
|
||||
[bool doubleSided = false]) {
|
||||
Path path;
|
||||
|
||||
// The arrows usually looks better with rounded caps.
|
||||
Paint paint = Paint()
|
||||
..color = Colors.black
|
||||
..style = PaintingStyle.stroke
|
||||
..strokeCap = StrokeCap.round
|
||||
..strokeJoin = StrokeJoin.round
|
||||
..strokeWidth = _lineWidth;
|
||||
|
||||
var length = sqrt((to.dx - from.dx) * (to.dx - from.dx) +
|
||||
(to.dy - from.dy) * (to.dy - from.dy));
|
||||
|
||||
/// Draw a single arrow.
|
||||
path = Path();
|
||||
path.moveTo(from.dx, from.dy);
|
||||
path.relativeCubicTo(
|
||||
0,
|
||||
0,
|
||||
(from.dx + to.dx) / (length * 2) + 40,
|
||||
(from.dy + to.dy) / (length * 2) + 40,
|
||||
to.dx - from.dx,
|
||||
to.dy - from.dy);
|
||||
path = ArrowPath.make(
|
||||
path: path,
|
||||
isDoubleSided: doubleSided,
|
||||
tipLength: 13,
|
||||
isAdjusted: false);
|
||||
canvas.drawPath(path, paint);
|
||||
}
|
||||
|
||||
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]!);
|
||||
} else {
|
||||
if (graphData.getDoubleSidedBool()) {
|
||||
if (d > i.num) {
|
||||
_drawHArrow(canvas, size, beg!, off[d]!, false);
|
||||
if (graphData.getUseLengthBool()) {
|
||||
_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);
|
||||
if (graphData.getUseLengthBool()) {
|
||||
_drawDotNames(
|
||||
canvas,
|
||||
Offset((off[d]!.dx + beg.dx) / 2 + 30,
|
||||
(off[d]!.dy + beg.dy) / 2 + 30),
|
||||
i.getL()[d].toString());
|
||||
}
|
||||
}
|
||||
} else {
|
||||
_drawLine(canvas, beg!, off[d]!);
|
||||
if (graphData.getUseLengthBool()) {
|
||||
_drawDotNames(
|
||||
canvas,
|
||||
Offset((off[d]!.dx + beg.dx) / 2, (off[d]!.dy + beg.dy) / 2),
|
||||
i.getL()[d].toString());
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
void _drawBFS(Canvas canvas) {
|
||||
if (intListPath != null) {
|
||||
for (int i = 0; i < intListPath!.length; i++) {
|
||||
_drawDot(canvas, _off[intListPath![i]]!, 8, Colors.yellow);
|
||||
}
|
||||
_drawDot(canvas, _off[start]!, 9, Colors.green);
|
||||
_drawDot(canvas, _off[end]!, 7, Colors.red.shade200);
|
||||
for (int i = 0; i < intListPath!.length; i++) {
|
||||
_drawDotNum(canvas, _off[intListPath![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);
|
||||
}
|
||||
}
|
||||
|
||||
void _drawDijkstra(Canvas canvas) {
|
||||
if (intListPath != null) {
|
||||
_drawDot(canvas, _off[start]!, 9, Colors.green);
|
||||
for (int i = 0; i < intListPath!.length; i++) {
|
||||
if (intListPath![i] == null) {
|
||||
_drawDotNum(canvas, _off[i + 1]!, "len: INF");
|
||||
} else {
|
||||
_drawDotNum(canvas, _off[i + 1]!, "len: ${intListPath![i]}");
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
@override
|
||||
void paint(Canvas canvas, Size size) {
|
||||
if (size.width > size.height) {
|
||||
_circleRad = size.height / 3;
|
||||
} else {
|
||||
_circleRad = size.width / 3;
|
||||
}
|
||||
|
||||
_off = _getDotPos(graphData.getDotAmount(), size); //, higest);
|
||||
for (int i in _off.keys) {
|
||||
_drawDot(canvas, _off[i]!);
|
||||
//drawDotNames(canvas, off[i]!, "${graphData.getDots()[i - 1].getName()}:[$i]");
|
||||
}
|
||||
|
||||
var g = graphData.getDots();
|
||||
switch (op) {
|
||||
case Operations.bfs:
|
||||
{
|
||||
_drawBFS(canvas);
|
||||
break;
|
||||
}
|
||||
case Operations.dfs:
|
||||
{
|
||||
_drawDFS(canvas);
|
||||
break;
|
||||
}
|
||||
case Operations.dijkstra:
|
||||
{
|
||||
_drawDijkstra(canvas);
|
||||
break;
|
||||
}
|
||||
default:
|
||||
{
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
_drawConnections(canvas, size, g, _off);
|
||||
for (int i in _off.keys) {
|
||||
//drawDot(canvas, off[i]!);
|
||||
_drawDotNames(
|
||||
canvas, _off[i]!, "${graphData.getDots()[i - 1].getName()}:[$i]");
|
||||
}
|
||||
}
|
||||
|
||||
@override
|
||||
bool shouldRepaint(CustomPainter oldDelegate) {
|
||||
return true;
|
||||
}
|
||||
}
|
||||
|
|
@ -89,6 +89,7 @@ class Dot {
|
|||
}
|
||||
|
||||
class Graphs {
|
||||
static const int intMax = 0x7fffffffffffffff;
|
||||
//Data
|
||||
String _name = "Undefined"; //Имя
|
||||
int _amount = 0; //Количество вершин
|
||||
|
|
@ -151,6 +152,9 @@ class Graphs {
|
|||
if (from <= 0 || from > _amount || to <= 0 && to > _amount) {
|
||||
return "Can't find specified path";
|
||||
}
|
||||
if (!_dots[from - 1].hasConnection(to)) {
|
||||
return "Already no connection between $from and $to";
|
||||
}
|
||||
_dots[from - 1].delPath(to);
|
||||
if (!_oriented) {
|
||||
_dots[to - 1].delPath(from);
|
||||
|
|
@ -652,28 +656,41 @@ class Graphs {
|
|||
return label;
|
||||
}
|
||||
|
||||
void dijkstra(int source) {
|
||||
List<int?> dijkstra(int from) {
|
||||
/*
|
||||
create vertex set Q;
|
||||
int n;
|
||||
... чтение n ...
|
||||
//vector<vector<pair<int,int>>> g(_amount);
|
||||
*/
|
||||
List<int?> d = List<int?>.filled(_amount, intMax);
|
||||
List<int> p = List<int>.filled(_amount, -1);
|
||||
|
||||
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[]*/
|
||||
d[from - 1] = 0;
|
||||
List<bool> u = List<bool>.filled(_amount, false);
|
||||
for (int i = 0; i < _amount; ++i) {
|
||||
int v = -1;
|
||||
for (int j = 0; j < _amount; ++j) {
|
||||
// int t;
|
||||
if (!u[j] && (v == -1 || d[j]! < d[v]!)) {
|
||||
v = j;
|
||||
}
|
||||
}
|
||||
if (d[v] == intMax) break;
|
||||
u[v] = true;
|
||||
for (int to in _dots[v].getL().keys) {
|
||||
int len = _dots[v].getL()[to]!;
|
||||
if (!_useLength && len == 0) len = 1;
|
||||
if (d[v]! + len < d[to - 1]!) {
|
||||
d[to - 1] = d[v]! + len;
|
||||
p[to - 1] = v;
|
||||
}
|
||||
}
|
||||
}
|
||||
for (int i = 0; i < d.length; i++) {
|
||||
// подумать как убрать эту часть
|
||||
if (d[i] == intMax) d[i] = null;
|
||||
}
|
||||
return d;
|
||||
}
|
||||
//************Алгоритмы************
|
||||
}
|
||||
|
|
|
|||
Loading…
Reference in New Issue