PyQt 和 Netgraph 交互图

Question

我有一个使用 PyQt 的应用程序，我想将 Netgraph 图形交互性添加到我的应用程序中。

但是，我无法单击图形的顶点和边。

这是一个最小的例子：

import sys

import matplotlib
import matplotlib.pyplot as plt

from netgraph import InteractiveGraph

from PyQt5 import QtWidgets

from matplotlib.backends.backend_qt5agg import FigureCanvasQTAgg, NavigationToolbar2QT
from matplotlib.figure import Figure

import networkx as nx

matplotlib.use('Qt5Agg')


class MplCanvas(FigureCanvasQTAgg):

    def __init__(self, parent=None, width=5, height=4, dpi=100):
        fig = Figure(figsize=(width, height), dpi=dpi)
        self.axes = fig.add_subplot(111)

        g = nx.house_x_graph()

        fig, ax = plt.subplots(figsize=(10, 10))

        plot_instance = InteractiveGraph(g)

        super(MplCanvas, self).__init__(fig)


class MainWindow(QtWidgets.QMainWindow):

    def __init__(self, *args, **kwargs):
        super(MainWindow, self).__init__(*args, **kwargs)

        sc = MplCanvas(self, width=5, height=4, dpi=100)

        toolbar = NavigationToolbar2QT(sc, self)

        layout = QtWidgets.QVBoxLayout()
        layout.addWidget(toolbar)
        layout.addWidget(sc)

        widget = QtWidgets.QWidget()
        widget.setLayout(layout)
        self.setCentralWidget(widget)

        self.show()


app = QtWidgets.QApplication(sys.argv)
w = MainWindow()
app.exec_()

这是我想要的行为示例：

import matplotlib.pyplot as plt
import networkx as nx
from netgraph import EditableGraph

g = nx.house_x_graph()


fig, ax = plt.subplots(figsize=(10, 10))

plot_instance = EditableGraph(g)

plt.show()

关于如何使 Netgraph 交互性与 PyQt 一起工作的任何想法？

Answer 1

有几个错误，但最重要的是：

您必须使用 canvas 中的相同图形，而不是使用 pyplot 创建新图形。
您必须将轴作为参数传递给 InteractiveGraph，以便它使用已经创建的图形。
将 InteractiveGraph 的实例保存为 class 的属性。

import sys

from PyQt5 import QtWidgets

import matplotlib

matplotlib.use("Qt5Agg")


from matplotlib.backends.backend_qt5agg import FigureCanvasQTAgg, NavigationToolbar2QT
from matplotlib.figure import Figure

from netgraph import InteractiveGraph

import networkx as nx


class MplCanvas(FigureCanvasQTAgg):
    def __init__(self, parent=None, width=5, height=4, dpi=100):
        super(MplCanvas, self).__init__(Figure(figsize=(width, height), dpi=dpi))
        self.setParent(parent)
        self.ax = self.figure.add_subplot(111)
        graph = nx.house_x_graph()
        self.plot_instance = InteractiveGraph(graph, ax=self.ax)


class MainWindow(QtWidgets.QMainWindow):
    def __init__(self, *args, **kwargs):
        super(MainWindow, self).__init__(*args, **kwargs)

        self.canvas = MplCanvas(self, width=5, height=4, dpi=100)
        self.toolbar = NavigationToolbar2QT(self.canvas, self)

        widget = QtWidgets.QWidget()
        self.setCentralWidget(widget)

        layout = QtWidgets.QVBoxLayout(widget)
        layout.addWidget(self.toolbar)
        layout.addWidget(self.canvas)


def main():
    app = QtWidgets.QApplication(sys.argv)
    w = MainWindow()
    w.show()
    app.exec_()


if __name__ == "__main__":
    main()

PyQt 和 Netgraph 交互图

PyQt and Netgraph Interactive Graph

python

matplotlib

pyqt5

interactive

netgraph