pyqt5+QWebEngine窗口图形无法显示解决方案
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参考技术A 附上网页： https://doc.qt.io/qt-5/qtwebengine-platform-notes.html解决方法：
1 系统高级设置-添加环境变量 QTWEBENGINE_DISABLE_SANDBOX = 1.
2 声明窗口程序时，输入参数添加"--no-sandbox"，例如：
app = QApplication(sys.argv+["--no-sandbox"])
解决办法：
https://blog.csdn.net/euler1983/article/details/120031945
在新窗口中显示 matplotlib 图，第二个窗口不显示结果 pyqt
【中文标题】在新窗口中显示 matplotlib 图，第二个窗口不显示结果 pyqt【英文标题】：show matplotlib graph in a new window , second window dont show result pyqt 【发布时间】：2020-10-21 16:18:08 【问题描述】：我正在使用 picot GUI 应用程序来显示一些图形和图表，我尝试使用 pyqtgraph 来显示，但它不适用于日期或时间，所以我切换到 matplotlib
效果很好，但结果显示在同一个窗口中，我无法返回主窗口
我正在寻找一种在另一个窗口中显示相同结果的方法，因为我尝试使用像这个示例 https://github.com/swharden/Python-GUI-examples/tree/master/2016-07-30_qt_matplotlib_sine_scroll 这样的小部件来做到这一点，在 ui 内部但它有很多问题
我试试这个例子matplotlib in second window pyqt5 它工作得很好，它显示了另一个窗口，但它是空的
这是我的用户界面
<?xml version="1.0" encoding="UTF-8"?>
<ui version="4.0">
<class>MainWindow</class>
<widget class="QMainWindow" name="MainWindow">
<property name="geometry">
<rect>
<x>0</x>
<y>0</y>
<width>800</width>
<height>600</height>
</rect>
</property>
<property name="windowTitle">
<string>MainWindow</string>
</property>
<widget class="QWidget" name="centralwidget">
<widget class="QPushButton" name="pushButton_113">
<property name="geometry">
<rect>
<x>610</x>
<y>90</y>
<width>161</width>
<height>41</height>
</rect>
</property>
<property name="text">
<string>Recherche</string>
</property>
</widget>
<widget class="QDateEdit" name="dateEdit_20">
<property name="geometry">
<rect>
<x>340</x>
<y>90</y>
<width>251</width>
<height>41</height>
</rect>
</property>
<property name="dateTime">
<datetime>
<hour>0</hour>
<minute>0</minute>
<second>0</second>
<year>2020</year>
<month>1</month>
<day>1</day>
</datetime>
</property>
<property name="calendarPopup">
<bool>true</bool>
</property>
</widget>
<widget class="QDateEdit" name="dateEdit_19">
<property name="geometry">
<rect>
<x>40</x>
<y>90</y>
<width>271</width>
<height>41</height>
</rect>
</property>
<property name="dateTime">
<datetime>
<hour>0</hour>
<minute>0</minute>
<second>0</second>
<year>2020</year>
<month>1</month>
<day>1</day>
</datetime>
</property>
<property name="calendarPopup">
<bool>true</bool>
</property>
</widget>
</widget>
<widget class="QStatusBar" name="statusbar"/>
</widget>
<resources/>
<connections/>
</ui>
这是运行 matplotlib 图形的函数
import sys
from PyQt5.QtWidgets import QApplication, QMainWindow
from pyqtgraph import PlotWidget, plot
import pyqtgraph as pg
import pandas as pd
from pandas import *
from datetime import datetime
import matplotlib.pyplot as plt
import matplotlib.dates as mdates
import matplotlib
matplotlib.use('Qt5Agg')
from matplotlib.backends.backend_qt5agg import FigureCanvasQTAgg, NavigationToolbar2QT as NavigationToolbar
from matplotlib.figure import Figure
import psycopg2
from admin import Ui_MainWindow as ui
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)
super(MplCanvas, self).__init__(fig)
class SecondWindow(QMainWindow):
def __init__(self):
super(SecondWindow, self).__init__()
self.main_widget = QtWidgets.QWidget()
self.setCentralWidget(self.main_widget)
layout = QtWidgets.QVBoxLayout(self.main_widget)
sc = MplCanvas(self.main_widget, width = 300, height = 300)
layout.addWidget(sc)
class MainApp(QMainWindow, ui):
def __init__(self):
QMainWindow.__init__(self)
self.setupUi(self)
self.Handel_Buttons()
def Handel_Buttons(self):
self.pushButton_113.clicked.connect(self.draw_graph_all)
def draw_graph_all(self): #pushButton_113
self.connection = psycopg2.connect(user="postgres",
password="password",
host="localhost",
database="database")
self.cur = self.connection.cursor()
date_0 = str(self.dateEdit_19.text())
date_1 = str(self.dateEdit_20.text())
self.cur.execute( '''SELECT date_d, SUM(montant) FROM transactions WHERE date_d BETWEEN %s AND %s GROUP BY date_d ''', (date_0, date_1))
rows = self.cur.fetchall()
date = []
montant = []
for row in rows:
date.append(row[0])
montant.append(row[1])
self.SW = SecondWindow()
sc = MplCanvas(self, width=5, height=4, dpi=100)
sc.axes.plot(date, montant)
self.SW.resize(300,300)
self.SW.show()
【问题讨论】：
【参考方案1】：我找到了在新的分隔窗口中显示 matplotlib 图形的解决方案
import sys
from PyQt5.QtWidgets import QApplication, QMainWindow
from pyqtgraph import PlotWidget, plot
import pyqtgraph as pg
import pandas as pd
from pandas import *
from datetime import datetime
import matplotlib.pyplot as plt
import matplotlib.dates as mdates
import matplotlib
matplotlib.use('Qt5Agg')
from matplotlib.backends.backend_qt5agg import FigureCanvasQTAgg, NavigationToolbar2QT as NavigationToolbar
from matplotlib.figure import Figure
import psycopg2
from admin import Ui_MainWindow as ui
class MainApp(QMainWindow, ui):
def __init__(self):
QMainWindow.__init__(self)
self.setupUi(self)
self.Handel_Buttons()
def Handel_Buttons(self):
self.pushButton_113.clicked.connect(self.draw_graph_all)
def draw_graph_all(self): #pushButton_113
self.connection = psycopg2.connect(user="postgres",
password="password",
host="localhost",
database="database")
self.cur = self.connection.cursor()
date_0 = str(self.dateEdit_19.text())
date_1 = str(self.dateEdit_20.text())
self.cur.execute( '''SELECT date_d, SUM(montant) FROM transactions WHERE date_d BETWEEN %s AND %s GROUP BY date_d ''', (date_0, date_1))
rows = self.cur.fetchall()
date = []
montant = []
for row in rows:
date.append(row[0])
montant.append(row[1])
plt.figure()
plt.plot(date, montant)
plt.show(block=False)
【讨论】：
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