GraphsPath/main.py at master · DaniilSmirnov/GraphsPath · GitHub

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
import matplotlib.pyplot as plt
import networkx as nx
from PyQt5.QtGui import *
from PyQt5.QtWidgets import *
from matplotlib.backends.backend_qt5agg import FigureCanvasQTAgg as FigureCanvas

matrix = []


class MainWidget(QWidget):

    def __init__(self):
        super(MainWidget, self).__init__()
        font = QFont()
        font.setPointSize(16)
        self.initUI()

    def initUI(self):

        self.center()
        self.setWindowTitle('Поиск Эйлерова пути')

        self.gridLayout = QGridLayout()
        self.setLayout(self.gridLayout)

        self.label_2 = QLabel("Матрица смежности")
        self.label_2.setObjectName("label_2")
        self.gridLayout.addWidget(self.label_2, 0, 1, 1, 1)
        self.line = QFrame()
        self.line.setFrameShape(QFrame.VLine)
        self.line.setFrameShadow(QFrame.Sunken)
        self.line.setObjectName("line")
        self.gridLayout.addWidget(self.line, 0, 2, 4, 1)
        self.tableWidget = QTableWidget()
        self.tableWidget.setObjectName("tableWidget")
        self.gridLayout.addWidget(self.tableWidget, 1, 0, 1, 2)
        self.tableWidget.setSizePolicy(QSizePolicy.MinimumExpanding, QSizePolicy.Minimum)
        self.label = QLabel("Количество вершин")
        self.label.setObjectName("label")
        self.gridLayout.addWidget(self.label, 2, 0, 1, 1)
        self.spinBox = QSpinBox()
        self.spinBox.setObjectName("spinBox")
        self.gridLayout.addWidget(self.spinBox, 2, 1, 1, 1)
        self.label_3 = QLabel("Путь:")
        self.label_3.setObjectName("label_3")
        self.gridLayout.addWidget(self.label_3, 3, 0, 1, 1)

        self.figure = plt.figure()
        self.canvas = FigureCanvas(self.figure)
        self.gridLayout.addWidget(self.canvas, 0, 3, 4, 1)

        self.spinBox.valueChanged.connect(self.matrix_draw)
        self.tableWidget.cellChanged.connect(self.get_matrix)

        self.spinBox.setValue(2)
        self.show()

    def matrix_draw(self):
        amount = int(self.spinBox.text())
        i = 1
        self.tableWidget.setRowCount(amount)
        self.tableWidget.setColumnCount(amount)
        headers = []
        while i < amount:
            headers.append(str(i))
            i += 1
        self.tableWidget.setHorizontalHeaderLabels(headers)
        self.tableWidget.setVerticalHeaderLabels(headers)
        self.tableWidget.resizeColumnsToContents()

    def get_matrix(self):
        amount = int(self.spinBox.text())

        exec = True

        for i in range(0, amount, 1):
            for j in range(0, amount, 1):
                item = self.tableWidget.item(i, j)
                if item is None:
                    exec = False
                j += 1
            i += 1

        if exec:
            for i in range(0, amount, 1):
                for j in range(0, amount, 1):
                    item = self.tableWidget.item(i, j)
                    if item.text() == "1":
                        matrix.append((i+1, j+1))

                    j += 1
                i += 1

            self.plot()

    def plot(self):
        self.figure.clf()
        G = nx.Graph()
        G.add_edges_from(matrix)
        nx.draw(G, with_labels=True)
        self.canvas.draw_idle()

        try:
            self.label_3.setText("Эйлеров путь для введеного графа: " + str(list(nx.eulerian_circuit(G))))
        except nx.NetworkXError:
            self.label_3.setText("В этом графе Эйлерова пути не существует")

    def center(self):
        qr = self.frameGeometry()
        cp = QDesktopWidget().availableGeometry().center()
        qr.moveCenter(cp)
        self.move(qr.topLeft())


if __name__ == '__main__':

    import sys
    app = QApplication(sys.argv)
    app.aboutToQuit.connect(app.deleteLater)
    app.setStyle("Fusion")
    screen = MainWidget()
    screen.show()
    sys.exit(app.exec_())