540 lines
18 KiB
Dart
540 lines
18 KiB
Dart
import 'package:graphs/src/graph.dart';
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import 'package:graphs/src/curve_painter.dart';
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import 'package:file_picker/file_picker.dart';
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import 'package:flutter/material.dart';
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Graphs getGraph() {
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List<Dot> d = <Dot>[];
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d.add(Dot.fromTwoLists("1", [2], [3]));
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d.add(Dot.fromTwoLists("2", [3], [1]));
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d.add(Dot.fromTwoLists("3", [1], [2]));
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//d.add(Dot.fromTwoLists("Name1", [], []));
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//d.add(Dot.fromTwoLists("Name2", [], []));
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return Graphs.fromList("Имя графа", d, true, true);
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}
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class DrawingPage extends StatefulWidget {
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const DrawingPage({Key? key}) : super(key: key);
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@override
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State<StatefulWidget> createState() => _DrawingPageState();
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}
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class _DrawingPageState extends State<DrawingPage> {
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double screenSize = 0;
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Graphs graphData = getGraph();
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List<int?>? intListPath;
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List<bool>? dfsAccessTable;
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//List<int?>? dijkstraTable;
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String op = Operations.none;
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int? startDot;
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int? endDot;
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String? dropdownValue1;
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String? dropdownValue2;
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String currOp = "";
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final _textNameController = TextEditingController();
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final _textLnthController = TextEditingController();
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final _textGrNmController = TextEditingController();
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void clearInputData() {
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setState(() {
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_textLnthController.clear();
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_textNameController.clear();
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dropdownValue1 = null;
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dropdownValue2 = null;
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});
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}
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void clearDropDownVals() {
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setState(() {
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startDot = null;
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intListPath = null;
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dfsAccessTable = null;
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endDot = null;
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currOp = "";
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op = Operations.none;
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});
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}
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// *************buttons*************
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ElevatedButton createButton(String txt, void Function() onPressing) {
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return ElevatedButton(
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onPressed: onPressing,
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style: ButtonStyle(
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backgroundColor: MaterialStateProperty.resolveWith<Color>(
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(states) => Colors.green.shade700)),
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child: Text(txt,
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style: const TextStyle(
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fontSize: 15,
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color: Colors.white70,
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height: 1,
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)),
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);
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}
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void showPopUp(String alertTitle, String err) => showDialog<String>(
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context: context,
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builder: (BuildContext context) => AlertDialog(
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title: Text(alertTitle, style: const TextStyle(fontSize: 26)),
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content: Text(
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err,
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style: const TextStyle(fontSize: 18),
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),
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actions: <Widget>[
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TextButton(
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onPressed: () => Navigator.pop(context, 'OK'),
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child: const Text('OK'),
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),
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],
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),
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);
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// *************buttons*************
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// ***addSpace***
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SizedBox addSpaceH(double h) {
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return SizedBox(height: h);
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}
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SizedBox addSpaceW(double w) {
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return SizedBox(width: w);
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}
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// ***addSpace***
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// *************inputs*************
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Container createInputBox(String text, double width, IconData? icon,
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TextEditingController? controller) {
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if (icon == null) {
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return Container(
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width: width,
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height: 40,
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margin: const EdgeInsets.symmetric(horizontal: 20, vertical: 5),
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child: TextField(
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controller: controller,
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textAlign: TextAlign.center,
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onChanged: (name) => graphData.setName(name),
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decoration: InputDecoration(
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contentPadding:
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const EdgeInsets.symmetric(vertical: 10, horizontal: 10),
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filled: true,
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fillColor: Colors.white,
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//prefixIcon: Icon(icon, color: Colors.black),
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border: const OutlineInputBorder(
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borderRadius: BorderRadius.all(Radius.circular(40))),
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hintStyle: const TextStyle(color: Colors.black38),
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hintText: text),
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));
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}
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return Container(
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width: width,
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height: 40,
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margin: const EdgeInsets.symmetric(horizontal: 20, vertical: 5),
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child: TextField(
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controller: controller,
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textAlign: TextAlign.center,
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decoration: InputDecoration(
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contentPadding:
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const EdgeInsets.symmetric(vertical: 10, horizontal: 10),
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filled: true,
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fillColor: Colors.white,
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prefixIcon: Icon(icon, color: Colors.black),
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border: const OutlineInputBorder(
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borderRadius: BorderRadius.all(Radius.circular(40))),
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hintStyle: const TextStyle(color: Colors.black38),
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hintText: text),
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));
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}
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SizedBox dropList1(double width) {
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var button = DropdownButton(
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hint: const Text(
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'Select dot',
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style: TextStyle(color: Colors.white, fontSize: 13),
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),
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//icon: const Icon(Icons.fiber_manual_record, color: Colors.white),
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alignment: AlignmentDirectional.bottomEnd,
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value: dropdownValue1,
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isDense: true,
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borderRadius: const BorderRadius.all(Radius.circular(20)),
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dropdownColor: Colors.green.shade800,
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style: const TextStyle(
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color: Colors.white,
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fontSize: 18,
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),
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onChanged: (String? newValue) {
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setState(() {
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dropdownValue1 = newValue;
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});
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},
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items: graphData.getDots().map((location) {
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return DropdownMenuItem(
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child: Text(location.getName()),
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value: location.num.toString(),
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);
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}).toList(),
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);
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return SizedBox(
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child: button,
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width: width,
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);
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}
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SizedBox dropList2(double width) {
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var button = DropdownButton(
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hint: const Text(
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'Select Dot',
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style: TextStyle(color: Colors.white, fontSize: 13),
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),
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alignment: AlignmentDirectional.centerEnd,
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value: dropdownValue2,
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isDense: true,
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borderRadius: const BorderRadius.all(Radius.circular(20)),
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dropdownColor: Colors.green.shade800,
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style: const TextStyle(
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color: Colors.white,
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fontSize: 18,
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),
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onChanged: (String? newValue) {
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setState(() {
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dropdownValue2 = newValue;
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});
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},
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items: graphData.getDots().map((location) {
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return DropdownMenuItem(
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child: Text(location.getName()),
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value: location.num.toString(),
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);
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}).toList(),
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);
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return SizedBox(
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child: button,
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width: width,
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);
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}
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// *************inputs*************
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//*********ButtonsFunctions*********
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void addDotPushed() {
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clearDropDownVals();
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if (_textNameController.text == "") {
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showPopUp("Error", "No name in \"Dot name\" box");
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} else {
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setState(() {
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String? res = graphData.addIsolated(_textNameController.text);
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if (res != null) {
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showPopUp("Error", res);
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}
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});
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}
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clearInputData();
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}
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void addPathPushed() {
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clearDropDownVals();
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if (dropdownValue1 == null) {
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showPopUp("Error", "No dot in first box selected");
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} else if (dropdownValue2 == null) {
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showPopUp("Error", "No dot in second box selected");
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} else if (_textLnthController.text == "" && graphData.getUseLengthBool()) {
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showPopUp("Error", "No length in \"Input length\" box");
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} else {
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int? from = int.parse(dropdownValue1!);
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int? to = int.parse(dropdownValue2!);
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int? len = int.tryParse(_textLnthController.text);
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if (len == null && graphData.getUseLengthBool()) {
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showPopUp("Error",
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"Can't parse input.\nInts only allowed in \"Input length\"");
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} else {
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len ??= 0;
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setState(() {
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String? res = graphData.addPath(from, to, len!);
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if (res != null) showPopUp("Error", res);
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});
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}
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}
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clearInputData();
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}
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void changeOriented() {
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setState(() {
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String? res = graphData.flipUseOrientation();
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if (res != null) showPopUp("Error", res);
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});
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}
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void changeLength() {
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setState(() {
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String? res = graphData.flipUseLength();
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if (res != null) showPopUp("Error", res);
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});
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}
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void delPathPushed() {
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clearDropDownVals();
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if (dropdownValue1 == null) {
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showPopUp("Error", "No dot in first box selected");
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} else if (dropdownValue2 == null) {
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showPopUp("Error", "No dot in second box selected");
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} else {
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int? from = int.tryParse(dropdownValue1!);
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int? to = int.tryParse(dropdownValue2!);
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if (from == null || to == null) {
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showPopUp("Error",
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"Can't parse input.\nInts only allowed in \"Dot number\" and \"Destination number\"");
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} else {
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setState(() {
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String? res = graphData.delPath(from, to);
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if (res != null) {
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showPopUp("Error", res);
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}
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});
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}
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}
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clearInputData();
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}
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void delDotPushed() {
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if (dropdownValue1 != null) {
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setState(() {
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String? res = graphData.delDot(int.parse(dropdownValue1!));
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if (res != null) {
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showPopUp("Error", res);
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}
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});
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} else {
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showPopUp("Error", "Nothing in input");
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}
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clearDropDownVals();
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clearInputData();
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}
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void fileOpener() async {
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FilePickerResult? result =
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await FilePicker.platform.pickFiles(allowedExtensions: ["txt"]);
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if (result != null) {
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if (!result.files.single.path!.endsWith(".txt")) {
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showPopUp("Error", "Can open only \".txt\" files");
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} else {
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setState(() {
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String? res =
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graphData.replaceDataFromFile(result.files.single.path!);
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if (res != null) showPopUp("Error", res);
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});
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}
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} else {
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showPopUp("Error", "No file selected");
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}
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clearDropDownVals();
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clearInputData();
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}
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void fileSaver() async {
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String? outputFile = await FilePicker.platform.saveFile(
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dialogTitle: 'Please select an output file:',
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fileName: 'output-file.txt',
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allowedExtensions: ["txt"]);
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if (outputFile == null) {
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showPopUp("Error", "Save cancelled");
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} else {
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if (!outputFile.endsWith(".txt")) {
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outputFile += ".txt";
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}
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graphData.printToFile(outputFile);
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}
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clearDropDownVals();
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clearInputData();
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}
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void bfsPushed() {
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clearDropDownVals();
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if (dropdownValue1 == null) {
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showPopUp("Error", "No dot in first box selected");
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} else if (dropdownValue2 == null) {
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showPopUp("Error", "No dot in second box selected");
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} else {
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setState(() {
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startDot = int.parse(dropdownValue1!);
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endDot = int.parse(dropdownValue2!);
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currOp = "OP: BFS from $startDot to $endDot";
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op = Operations.bfs;
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intListPath = graphData.bfsPath(startDot!, endDot!);
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});
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if (intListPath == null) {
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showPopUp("Info", "There is no path");
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}
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//print(intListPath);
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}
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clearInputData();
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}
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void dfsPushed() {
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clearDropDownVals();
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if (dropdownValue1 == null) {
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showPopUp("Error", "No dot in first box selected");
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} else {
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setState(() {
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startDot = int.parse(dropdownValue1!);
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op = Operations.dfs;
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currOp = "OP: DFS from $startDot";
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dfsAccessTable = graphData.dfsIterative(startDot!);
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});
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if (dfsAccessTable == null) {
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showPopUp("Err", "report this error.");
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}
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//print(dfsAccessTable);
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}
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clearInputData();
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}
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void dijkstraPushed() {
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clearDropDownVals();
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if (dropdownValue1 == null) {
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showPopUp("Error", "No number in \"Dot number\" box");
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} else {
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setState(() {
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startDot = int.parse(dropdownValue1!);
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currOp = "OP: Dijkstra from $startDot";
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op = Operations.dijkstra;
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intListPath = graphData.dijkstra(startDot!);
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});
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if (intListPath == null) {
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showPopUp("Err", "report this error.");
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}
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//print(intListPath);
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}
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clearInputData();
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}
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//*********ButtonsFunctions*********
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// build
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@override
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Widget build(BuildContext context) {
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screenSize = MediaQuery.of(context).size.width;
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_textGrNmController.text = graphData.getName();
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return MaterialApp(
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home: Scaffold(
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appBar: AppBar(
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title: const Align(
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alignment: Alignment.topLeft,
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child: Text("Graph name:\n",
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style: TextStyle(
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fontSize: 18,
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color: Colors.white,
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))),
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toolbarHeight: 110,
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flexibleSpace: Container(
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color: Colors.green.shade900,
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child: Column(children: <Widget>[
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const SizedBox(height: 5),
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Row(children: [
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addSpaceW(screenSize / 8 + 19),
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createButton("\nAdd dot\n", addDotPushed),
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createInputBox("Dot name", screenSize / 4 - 25, Icons.label,
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_textNameController),
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addSpaceW(8),
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createButton("\nAdd path\n", addPathPushed),
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createInputBox("Input length", screenSize / 4 - 25,
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Icons.arrow_right_alt_outlined, _textLnthController),
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]),
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addSpaceH(3),
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Row(children: [
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addSpaceW(6),
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createInputBox(
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"Name", screenSize / 8 - 25, null, _textGrNmController),
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//addSpaceW(screenSize / 8 - 4),
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createButton("\nDel dot \n", delDotPushed),
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//createInputBox("Dot number", screenSize / 4 - 25, Icons.fiber_manual_record, _textNumbController),
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addSpaceW(54),
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dropList1(screenSize / 4 - 80),
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addSpaceW(53),
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createButton("\nDel path\n", delPathPushed),
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addSpaceW(54),
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dropList2(screenSize / 4 - 80),
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//createInputBox("Destination number", screenSize / 4 - 25, Icons.fiber_manual_record, _textDestController),
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]),
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]),
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),
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actions: [
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IconButton(
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onPressed: () {
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setState(() {
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clearDropDownVals();
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graphData.flushData();
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clearInputData();
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});
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},
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icon: const Icon(Icons.delete_sweep),
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iconSize: 60,
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),
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]),
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body: CustomPaint(
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painter: CurvePainter(
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graphData: graphData,
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intListPath: intListPath,
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dfsAccessTable: dfsAccessTable,
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start: startDot,
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end: endDot,
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op: op),
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child: Align(
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alignment: Alignment.topRight,
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child: ButtonBar(
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mainAxisSize: MainAxisSize.min,
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children: <Widget>[
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Text(
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currOp,
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style: const TextStyle(fontSize: 14, color: Colors.black),
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),
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createButton("Bfs", bfsPushed),
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createButton("Dfs", dfsPushed),
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createButton("Dijkstra", dijkstraPushed),
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createButton("Clear OP", () {
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clearDropDownVals();
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clearInputData();
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}),
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createButton(graphData.getUseLengthStr(), changeLength),
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createButton(graphData.getDoubleSidedStr(), changeOriented),
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createButton("Save to file", fileSaver),
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createButton("Load from file", fileOpener),
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createButton("Help", () {
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String out =
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" В поле \"Graph name\" можно сменить имя графу.\n";
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out +=
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" Для добавления точки необходимо ввести имя в \"Dot name\" и нажать на \"Add dot\".\n";
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out +=
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" Для удаления точки необходимо выбрать номер в левом выпадающем списке и нажать на \"Del dot\".\n";
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out +=
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" Для добавления пути необходимо выбрать: первую вершину в левом выпадающем списке, вторую вершину в правом выпадающем списке, ";
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out +=
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"и, если граф взвешенный, то ввести длину пути в \"Input length\". Затем нажать \"Add path\".\n";
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out +=
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" Для удаления пути необходимо выбрать первую вершину из левого списка и вторую вершину в правом списке. Затем нажать \"Del path\".\n\n";
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out +=
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" Кнопка \"Bfs\" отмечает точки в пути из вершины, выбранной слева, в вершину, выбранную справа.\n";
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out +=
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" Кнопка \"Dfs\" помечает точки, которые доступны из вершины, выбранной слева.";
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out +=
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" Кнопка \"Dijkstra\" ищет кратчайший путь из вершины, выбранной слева. во все другие.";
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out +=
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" Кнопка \"Clear op\" отменяет \"Bfs\", \"Dfs\" и \"Dijkstra\". Все эти отображения так же отменяются при любых действиях с графом.";
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out +=
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" 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);
|
||
})
|
||
],
|
||
),
|
||
),
|
||
),
|
||
));
|
||
}
|
||
}
|