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Graphs_dart
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Попытки в стрелочки (неудачные)

This commit is contained in:
Морозов Андрей 2021-11-05 21:57:12 +04:00
parent d965d2e038
commit 5653628cfe
3 changed files with 244 additions and 20 deletions
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224
flutter/lib/curve_painter.dart
View File

@ -48,6 +48,15 @@ class CurvePainter extends CustomPainter {
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 drawAboveText(Canvas canvas, Offset size, String s) {
var textPainter = _getTextPainter(s);
textPainter.layout();
@ -80,7 +89,7 @@ class CurvePainter extends CustomPainter {
return off;
}
void drawArrow(Canvas canvas, Offset from, Offset to,
void drawLowArrow(Canvas canvas, Size size, Offset from, Offset to,
[bool doubleSided = false]) {
Path path;
@ -93,15 +102,42 @@ class CurvePainter extends CustomPainter {
..strokeWidth = width - 1;
/// Draw a single arrow.
path = Path();
path = Path();
path.moveTo(from.dx, from.dy);
path.relativeCubicTo(0, 0, 0, 0, to.dx - from.dx, to.dy - from.dy);
path.relativeCubicTo(
0, 0, size.width / 20, 50, to.dx - from.dx, to.dy - from.dy);
path =
ArrowPath.make(path: path, isDoubleSided: doubleSided, tipLength: 13);
canvas.drawPath(path, paint);
}
void drawConnections(Canvas canvas, List<Dot> dots, Map<int, Offset> off) {
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 = width - 1;
/// Draw a single arrow.
path = Path();
path.moveTo(from.dx, from.dy);
path.relativeCubicTo(
0, 0, -size.width / 25, -50, 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];
@ -109,7 +145,35 @@ class CurvePainter extends CustomPainter {
if (d == i.num) {
drawSelfConnect(canvas, off[d]!);
} else {
drawArrow(canvas, beg!, off[d]!, !gr.getDoubleSidedBool());
if (gr.getDoubleSidedBool()) {
if (d > i.num) {
drawLowArrow(canvas, size, beg!, off[d]!, false);
if (gr.getUseLengthBool()) {
drawDotNames(
canvas,
Offset((off[d]!.dx + beg.dx) / 2 - 20,
(off[d]!.dy + beg.dy) / 2 - 20),
i.getL()[d].toString());
}
} else {
drawHighArrow(canvas, size, beg!, off[d]!, false);
if (gr.getUseLengthBool()) {
drawDotNames(
canvas,
Offset((off[d]!.dx + beg.dx) / 2 + 25,
(off[d]!.dy + beg.dy) / 2 + 25),
i.getL()[d].toString());
}
}
} else {
drawLine(canvas, beg!, off[d]!);
if (gr.getUseLengthBool()) {
drawDotNames(
canvas,
Offset((off[d]!.dx + beg.dx) / 2, (off[d]!.dy + beg.dy) / 2),
i.getL()[d].toString());
}
}
}
}
}
@ -128,12 +192,15 @@ class CurvePainter extends CustomPainter {
//gr = getGraph();
var off = getDotPos(gr.getDotAmount(), size);
for (int i = 0; i < off.length; i++) {
drawDot(canvas, off[i + 1]!);
drawAboveText(
canvas, off[i + 1]!, "${gr.getDots()[i].getName()}:[${i + 1}]");
for (int i in off.keys) {
drawDot(canvas, off[i]!);
drawDotNames(canvas, off[i]!, "${gr.getDots()[i - 1].getName()}:[${i}]");
}
drawConnections(canvas, gr.getDots(), off);
//var g = gr.getNoRepeatDots();
//print(g);
var g = gr.getDots();
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));
}
@ -151,3 +218,140 @@ class CurvePainter extends CustomPainter {
textPainter.paint(canvas, drawPosition);
}*/
}
void pringArr(Canvas canvas, Size size) {
TextSpan textSpan;
TextPainter textPainter;
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 = 3.0;
/// Draw a single arrow.
path = Path();
path.moveTo(size.width * 0.25, size.height * 0.10);
path.relativeCubicTo(0, 0, size.width * 0.25, 50, size.width * 0.5, 0);
path = ArrowPath.make(path: path);
canvas.drawPath(path, paint..color = Colors.blue);
textSpan = const TextSpan(
text: 'Single arrow',
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 * 0.06));
/*
/// 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, 50, size.width * 0.5, 50);
path.relativeCubicTo(0, 0, -size.width * 0.25, 0, -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));*/
}

17
flutter/lib/pages/drawing_page.dart
View File

@ -6,12 +6,12 @@ import 'package:flutter/material.dart';
Graphs getGraph() {
List<Dot> d = <Dot>[];
d.add(Dot.fromTwoLists("1", [2, 3], [1, 1]));
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, 1]));
d.add(Dot.fromTwoLists("3", [1, 2], [1, 2]));
d.add(Dot.fromTwoLists("Name1", [], []));
d.add(Dot.fromTwoLists("Name2", [], []));
return Graphs.fromList("1", d, false, true);
return Graphs.fromList("1", d, true, false);
}
class DrawingPage extends StatefulWidget {
@ -301,9 +301,13 @@ class _DrawingPageState extends State<DrawingPage> {
await FilePicker.platform.pickFiles(allowedExtensions: ["txt"]);
setState(() {
if (result != null) {
//print(result.files.single.path!);
String? res = data.replaceDataFromFile(result.files.single.path!);
if (res != null) showPopUp("Error", res);
if (!result.files.single.path!.endsWith(".txt")) {
showPopUp("Error", "Can open only \".txt\" files");
} else {
//print(result.files.single.path!);
String? res = data.replaceDataFromFile(result.files.single.path!);
if (res != null) showPopUp("Error", res);
}
} else {
showPopUp("Error", "No file selected");
// User canceled the picker
@ -316,7 +320,6 @@ class _DrawingPageState extends State<DrawingPage> {
dialogTitle: 'Please select an output file:',
fileName: 'output-file.txt',
allowedExtensions: ["txt"]);
if (outputFile == null) {
showPopUp("Error", "Save cancelled");
// User canceled the picker

23
flutter/lib/src/graph.dart
View File

@ -54,9 +54,9 @@ class Dot {
}
//******Constructor******
Dot() {
_name = "Undefined";
num = -1;
Dot([String name = "Undefined", int n = -1]) {
_name = name;
num = n;
_ln = <int, int>{};
}
Dot.fromTwoLists(String name, List<int> num0, List<int> length,
@ -398,6 +398,23 @@ class Graphs {
}
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******