带有pyqt窗口的可伸缩matplotlib图

Question

因为我的 stackoverflow 上一个问题我的数字的边缘：

但是，您可以看到它不能保持pyqt窗口缩放，我不知道如何使图形大小与我的窗口大小一致。

import sys
import matplotlib; matplotlib.use("Qt5Agg")

from PyQt5 import QtWidgets, QtCore, Qt # <- additional import
from matplotlib.backends.backend_qt5agg import FigureCanvasQTAgg, NavigationToolbar2QT
from matplotlib.figure import Figure
import matplotlib.pyplot as plt
from netgraph import EditableGraph


class MplCanvas(FigureCanvasQTAgg):
    def __init__(self, parent=None):
        figure = plt.figure()
        figure.set_figheight(6)
        figure.set_figwidth(6)
        plt.tight_layout()
        figure.patch.set_visible(False)
        super(MplCanvas, self).__init__(figure)
        self.setParent(parent)
        self.ax = plt.axes([0,0,1,1], frameon=False)
        self.ax.axis('off')
        self.ax.get_xaxis().set_visible(False)
        self.ax.get_yaxis().set_visible(False)
        self.graph = EditableGraph([(0, 1)], ax=self.ax)
        plt.autoscale(axis='both', tight=True)
        self.updateGeometry()


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

        self.canvas = MplCanvas(self)

        self.vbl = QtWidgets.QVBoxLayout()
        self.vbl.addWidget(self.canvas)
        self.setLayout(self.vbl)


def main():

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


if __name__ == "__main__":
    main()

我也面临着一种奇怪的行为。如果我将数字的高度和宽度更改为不同的值（8和6 por示例），那么

figure.set_figheight(8)
figure.set_figwidth(6)

它就停止触摸边界了：

我无法弄清楚为什么它在矩形图上不起作用。

有人知道我能做什么才能完善这种行为？

Answer 1

您可以使用此代码：

import sys
import matplotlib; matplotlib.use("Qt5Agg")

from PyQt5 import QtWidgets # <- additional import
from matplotlib.backends.backend_qt5agg import FigureCanvasQTAgg, NavigationToolbar2QT
from matplotlib.figure import Figure
import matplotlib.pyplot as plt
from netgraph import EditableGraph


class MplCanvas(FigureCanvasQTAgg):
    def __init__(self, parent=None):
        figure = plt.figure()
        figure.set_figheight(6)
        figure.set_figwidth(6)
        plt.tight_layout()
        figure.patch.set_visible(False)
        super(MplCanvas, self).__init__(figure)
        self.setParent(parent)
        self.ax = plt.axes([0,0,1,1], frameon=False)
        self.ax.axis('off')
        self.ax.get_xaxis().set_visible(False)
        self.ax.get_yaxis().set_visible(False)
        self.graph = EditableGraph([(0, 1)], ax=self.ax)
        plt.autoscale(axis='both', tight=True)
        self.updateGeometry()


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

        self.canvas = MplCanvas(self)
        self.lbl = QtWidgets.QLabel(self)
        self.setCentralWidget(self.canvas)
        self.setFixedHeight(700)
        self.setFixedWidth(700)


def main():

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


if __name__ == "__main__":
    main()