Python 在PyQt5中从主窗口打开文件到新窗口（在不同的文件中）_Python_Pyqt_Pyqt5

Python 在PyQt5中从主窗口打开文件到新窗口（在不同的文件中）

python

Python 在PyQt5中从主窗口打开文件到新窗口（在不同的文件中）,python,pyqt,pyqt5,Python,Pyqt,Pyqt5,我有两个文件，一个用于我的主窗口，其中有一个图像和一个按钮，另一个用于新窗口。我想让它做的是，当我从主窗口按下按钮时，它允许我加载一个文件，并在新窗口的TextEdit小部件中显示它这里有我正在使用的文件： main window.py import sys import os from PyQt5 import QtWidgets, QtGui from PyQt5.QtWidgets import QApplication, QWidget from PyQt5.QtWidgets imp

我有两个文件，一个用于我的主窗口，其中有一个图像和一个按钮，另一个用于新窗口。我想让它做的是，当我从主窗口按下按钮时，它允许我加载一个文件，并在新窗口的

TextEdit

小部件中显示它

这里有我正在使用的文件：

main window.py

import sys
import os
from PyQt5 import QtWidgets, QtGui
from PyQt5.QtWidgets import QApplication, QWidget
from PyQt5.QtWidgets import QPushButton, QVBoxLayout, QTextEdit, QHBoxLayout, QLabel, QMainWindow, QAction, QFileDialog

class Window(QWidget):

    def __init__(self, parent=None):
        super(Window, self).__init__(parent)

        self.img = QLabel()
        self.relleno=QLabel()
        self.btn_load = QPushButton('Load')
        self.width = 400
        self.height = 150


        self.init_ui()

    def init_ui(self):
        self.img.setPixmap(QtGui.QPixmap("someimage.png"))


        h_layout = QHBoxLayout()
        v_layout = QVBoxLayout()
        h_final = QHBoxLayout()

        h_layout.addWidget(self.img)

        v_layout.addWidget(self.btn_load)

        h_final.addLayout(h_layout)
        h_final.addLayout(v_layout)

        self.btn_load.clicked.connect(self.loadafile)

        self.setLayout(h_final)
        self.setWindowTitle('This is main window')
        self.setGeometry(600,150,self.width,self.height)

        self.show()

    def loadafile(self):
        filename = QFileDialog.getOpenFileName(self, 'Open File', os.getenv('HOME'))
        with open(filename[0], 'r') as f:
            file_text = f.read()
            return file_text

def main():
    app = QApplication(sys.argv)
    main = Window()
    sys.exit(app.exec_())

if __name__ == '__main__':
    main()

import os
import sys
from PyQt5.QtWidgets import QApplication, QWidget, QTextEdit, QVBoxLayout
from MainWindow import loadafile

info=loadafile()

class SecondWindow(QWidget):
    def __init__(self):
        super(SecondWindow, self).__init__()
        self.text = QTextEdit(self)

        self.init_ui()

    def init_ui(self):
        v_layout = QVBoxLayout()

        v_layout.addWidget(self.text)

        self.setLayout(v_layout)
        self.setText(info)
        self.setWindowTitle('Opened Text')

        self.show()

app = QApplication(sys.argv)
shower = SecondWindow()
sys.exit(app.exec_())

from PyQt5 import QtWidgets

class SecondWindow(QtWidgets.QWidget):
    def __init__(self):
        super(SecondWindow, self).__init__()
        self.text = QtWidgets.QTextEdit(self)
        self.init_ui()

    def init_ui(self):
        v_layout = QtWidgets.QVBoxLayout(self)
        v_layout.addWidget(self.text)
        self.setWindowTitle('Opened Text')
        self.show()

if __name__ == '__main__':
    import sys
    app = QtWidgets.QApplication(sys.argv)
    shower = SecondWindow()
    sys.exit(app.exec_())

import os
import sys
from PyQt5 import QtCore, QtGui, QtWidgets

from NewWindow import SecondWindow

class Window(QtWidgets.QWidget):
    textChanged = QtCore.pyqtSignal(str)

    def __init__(self, parent=None):
        super(Window, self).__init__(parent)

        self.img =QtWidgets.QLabel()
        self.relleno=QtWidgets.QLabel()
        self.btn_load = QtWidgets.QPushButton('Load')
        self.width = 400
        self.height = 150


        self.init_ui()

    def init_ui(self):
        self.img.setPixmap(QtGui.QPixmap("someimage.png"))

        h_final = QtWidgets.QHBoxLayout(self)
        h_final.addWidget(self.img)
        h_final.addWidget(self.btn_load)

        self.btn_load.clicked.connect(self.loadafile)
        self.setWindowTitle('This is main window')
        self.setGeometry(600,150,self.width,self.height)

        self.show()

    @QtCore.pyqtSlot()
    def loadafile(self):
        filename, _  = QtWidgets.QFileDialog.getOpenFileName(self, 'Open File', os.getenv('HOME'))
        with open(filename, 'r') as f:
            file_text = f.read()
            self.textChanged.emit(file_text)

def main():
    app = QtWidgets.QApplication(sys.argv)
    main = Window()
    s = SecondWindow()
    main.textChanged.connect(s.text.append)
    sys.exit(app.exec_())

if __name__ == '__main__':
    main()

NewWindow.py

import sys
import os
from PyQt5 import QtWidgets, QtGui
from PyQt5.QtWidgets import QApplication, QWidget
from PyQt5.QtWidgets import QPushButton, QVBoxLayout, QTextEdit, QHBoxLayout, QLabel, QMainWindow, QAction, QFileDialog

class Window(QWidget):

    def __init__(self, parent=None):
        super(Window, self).__init__(parent)

        self.img = QLabel()
        self.relleno=QLabel()
        self.btn_load = QPushButton('Load')
        self.width = 400
        self.height = 150


        self.init_ui()

    def init_ui(self):
        self.img.setPixmap(QtGui.QPixmap("someimage.png"))


        h_layout = QHBoxLayout()
        v_layout = QVBoxLayout()
        h_final = QHBoxLayout()

        h_layout.addWidget(self.img)

        v_layout.addWidget(self.btn_load)

        h_final.addLayout(h_layout)
        h_final.addLayout(v_layout)

        self.btn_load.clicked.connect(self.loadafile)

        self.setLayout(h_final)
        self.setWindowTitle('This is main window')
        self.setGeometry(600,150,self.width,self.height)

        self.show()

    def loadafile(self):
        filename = QFileDialog.getOpenFileName(self, 'Open File', os.getenv('HOME'))
        with open(filename[0], 'r') as f:
            file_text = f.read()
            return file_text

def main():
    app = QApplication(sys.argv)
    main = Window()
    sys.exit(app.exec_())

if __name__ == '__main__':
    main()

import os
import sys
from PyQt5.QtWidgets import QApplication, QWidget, QTextEdit, QVBoxLayout
from MainWindow import loadafile

info=loadafile()

class SecondWindow(QWidget):
    def __init__(self):
        super(SecondWindow, self).__init__()
        self.text = QTextEdit(self)

        self.init_ui()

    def init_ui(self):
        v_layout = QVBoxLayout()

        v_layout.addWidget(self.text)

        self.setLayout(v_layout)
        self.setText(info)
        self.setWindowTitle('Opened Text')

        self.show()

app = QApplication(sys.argv)
shower = SecondWindow()
sys.exit(app.exec_())

from PyQt5 import QtWidgets

class SecondWindow(QtWidgets.QWidget):
    def __init__(self):
        super(SecondWindow, self).__init__()
        self.text = QtWidgets.QTextEdit(self)
        self.init_ui()

    def init_ui(self):
        v_layout = QtWidgets.QVBoxLayout(self)
        v_layout.addWidget(self.text)
        self.setWindowTitle('Opened Text')
        self.show()

if __name__ == '__main__':
    import sys
    app = QtWidgets.QApplication(sys.argv)
    shower = SecondWindow()
    sys.exit(app.exec_())

import os
import sys
from PyQt5 import QtCore, QtGui, QtWidgets

from NewWindow import SecondWindow

class Window(QtWidgets.QWidget):
    textChanged = QtCore.pyqtSignal(str)

    def __init__(self, parent=None):
        super(Window, self).__init__(parent)

        self.img =QtWidgets.QLabel()
        self.relleno=QtWidgets.QLabel()
        self.btn_load = QtWidgets.QPushButton('Load')
        self.width = 400
        self.height = 150


        self.init_ui()

    def init_ui(self):
        self.img.setPixmap(QtGui.QPixmap("someimage.png"))

        h_final = QtWidgets.QHBoxLayout(self)
        h_final.addWidget(self.img)
        h_final.addWidget(self.btn_load)

        self.btn_load.clicked.connect(self.loadafile)
        self.setWindowTitle('This is main window')
        self.setGeometry(600,150,self.width,self.height)

        self.show()

    @QtCore.pyqtSlot()
    def loadafile(self):
        filename, _  = QtWidgets.QFileDialog.getOpenFileName(self, 'Open File', os.getenv('HOME'))
        with open(filename, 'r') as f:
            file_text = f.read()
            self.textChanged.emit(file_text)

def main():
    app = QtWidgets.QApplication(sys.argv)
    main = Window()
    s = SecondWindow()
    main.textChanged.connect(s.text.append)
    sys.exit(app.exec_())

if __name__ == '__main__':
    main()

我认为

loadafile

确实返回了我的

file\u text

变量，但我不知道如何从那里打开新窗口。我想我需要在主窗口中使用析构函数，然后显示新窗口，但我不知道该怎么做（这是我第一次尝试OOP）

程序不是一组文件，尤其是在OOP中，程序是对象之间的交互。如果对象具有相同的作用域，则它们会进行交互，因此必须在一个位置创建两个窗口，以便将信息从一个窗口传递到另一个窗口

另一方面，在Qt中有一个基本概念，即信号，此功能允许通知另一个对象的状态更改，而无需太多依赖项，因此在本例中，我将创建一个信号，将文本传输到另一个对象

NewWindow.py

import sys
import os
from PyQt5 import QtWidgets, QtGui
from PyQt5.QtWidgets import QApplication, QWidget
from PyQt5.QtWidgets import QPushButton, QVBoxLayout, QTextEdit, QHBoxLayout, QLabel, QMainWindow, QAction, QFileDialog

class Window(QWidget):

    def __init__(self, parent=None):
        super(Window, self).__init__(parent)

        self.img = QLabel()
        self.relleno=QLabel()
        self.btn_load = QPushButton('Load')
        self.width = 400
        self.height = 150


        self.init_ui()

    def init_ui(self):
        self.img.setPixmap(QtGui.QPixmap("someimage.png"))


        h_layout = QHBoxLayout()
        v_layout = QVBoxLayout()
        h_final = QHBoxLayout()

        h_layout.addWidget(self.img)

        v_layout.addWidget(self.btn_load)

        h_final.addLayout(h_layout)
        h_final.addLayout(v_layout)

        self.btn_load.clicked.connect(self.loadafile)

        self.setLayout(h_final)
        self.setWindowTitle('This is main window')
        self.setGeometry(600,150,self.width,self.height)

        self.show()

    def loadafile(self):
        filename = QFileDialog.getOpenFileName(self, 'Open File', os.getenv('HOME'))
        with open(filename[0], 'r') as f:
            file_text = f.read()
            return file_text

def main():
    app = QApplication(sys.argv)
    main = Window()
    sys.exit(app.exec_())

if __name__ == '__main__':
    main()

import os
import sys
from PyQt5.QtWidgets import QApplication, QWidget, QTextEdit, QVBoxLayout
from MainWindow import loadafile

info=loadafile()

class SecondWindow(QWidget):
    def __init__(self):
        super(SecondWindow, self).__init__()
        self.text = QTextEdit(self)

        self.init_ui()

    def init_ui(self):
        v_layout = QVBoxLayout()

        v_layout.addWidget(self.text)

        self.setLayout(v_layout)
        self.setText(info)
        self.setWindowTitle('Opened Text')

        self.show()

app = QApplication(sys.argv)
shower = SecondWindow()
sys.exit(app.exec_())

from PyQt5 import QtWidgets

class SecondWindow(QtWidgets.QWidget):
    def __init__(self):
        super(SecondWindow, self).__init__()
        self.text = QtWidgets.QTextEdit(self)
        self.init_ui()

    def init_ui(self):
        v_layout = QtWidgets.QVBoxLayout(self)
        v_layout.addWidget(self.text)
        self.setWindowTitle('Opened Text')
        self.show()

if __name__ == '__main__':
    import sys
    app = QtWidgets.QApplication(sys.argv)
    shower = SecondWindow()
    sys.exit(app.exec_())

import os
import sys
from PyQt5 import QtCore, QtGui, QtWidgets

from NewWindow import SecondWindow

class Window(QtWidgets.QWidget):
    textChanged = QtCore.pyqtSignal(str)

    def __init__(self, parent=None):
        super(Window, self).__init__(parent)

        self.img =QtWidgets.QLabel()
        self.relleno=QtWidgets.QLabel()
        self.btn_load = QtWidgets.QPushButton('Load')
        self.width = 400
        self.height = 150


        self.init_ui()

    def init_ui(self):
        self.img.setPixmap(QtGui.QPixmap("someimage.png"))

        h_final = QtWidgets.QHBoxLayout(self)
        h_final.addWidget(self.img)
        h_final.addWidget(self.btn_load)

        self.btn_load.clicked.connect(self.loadafile)
        self.setWindowTitle('This is main window')
        self.setGeometry(600,150,self.width,self.height)

        self.show()

    @QtCore.pyqtSlot()
    def loadafile(self):
        filename, _  = QtWidgets.QFileDialog.getOpenFileName(self, 'Open File', os.getenv('HOME'))
        with open(filename, 'r') as f:
            file_text = f.read()
            self.textChanged.emit(file_text)

def main():
    app = QtWidgets.QApplication(sys.argv)
    main = Window()
    s = SecondWindow()
    main.textChanged.connect(s.text.append)
    sys.exit(app.exec_())

if __name__ == '__main__':
    main()

main window.py

import sys
import os
from PyQt5 import QtWidgets, QtGui
from PyQt5.QtWidgets import QApplication, QWidget
from PyQt5.QtWidgets import QPushButton, QVBoxLayout, QTextEdit, QHBoxLayout, QLabel, QMainWindow, QAction, QFileDialog

class Window(QWidget):

    def __init__(self, parent=None):
        super(Window, self).__init__(parent)

        self.img = QLabel()
        self.relleno=QLabel()
        self.btn_load = QPushButton('Load')
        self.width = 400
        self.height = 150


        self.init_ui()

    def init_ui(self):
        self.img.setPixmap(QtGui.QPixmap("someimage.png"))


        h_layout = QHBoxLayout()
        v_layout = QVBoxLayout()
        h_final = QHBoxLayout()

        h_layout.addWidget(self.img)

        v_layout.addWidget(self.btn_load)

        h_final.addLayout(h_layout)
        h_final.addLayout(v_layout)

        self.btn_load.clicked.connect(self.loadafile)

        self.setLayout(h_final)
        self.setWindowTitle('This is main window')
        self.setGeometry(600,150,self.width,self.height)

        self.show()

    def loadafile(self):
        filename = QFileDialog.getOpenFileName(self, 'Open File', os.getenv('HOME'))
        with open(filename[0], 'r') as f:
            file_text = f.read()
            return file_text

def main():
    app = QApplication(sys.argv)
    main = Window()
    sys.exit(app.exec_())

if __name__ == '__main__':
    main()

import os
import sys
from PyQt5.QtWidgets import QApplication, QWidget, QTextEdit, QVBoxLayout
from MainWindow import loadafile

info=loadafile()

class SecondWindow(QWidget):
    def __init__(self):
        super(SecondWindow, self).__init__()
        self.text = QTextEdit(self)

        self.init_ui()

    def init_ui(self):
        v_layout = QVBoxLayout()

        v_layout.addWidget(self.text)

        self.setLayout(v_layout)
        self.setText(info)
        self.setWindowTitle('Opened Text')

        self.show()

app = QApplication(sys.argv)
shower = SecondWindow()
sys.exit(app.exec_())

from PyQt5 import QtWidgets

class SecondWindow(QtWidgets.QWidget):
    def __init__(self):
        super(SecondWindow, self).__init__()
        self.text = QtWidgets.QTextEdit(self)
        self.init_ui()

    def init_ui(self):
        v_layout = QtWidgets.QVBoxLayout(self)
        v_layout.addWidget(self.text)
        self.setWindowTitle('Opened Text')
        self.show()

if __name__ == '__main__':
    import sys
    app = QtWidgets.QApplication(sys.argv)
    shower = SecondWindow()
    sys.exit(app.exec_())

import os
import sys
from PyQt5 import QtCore, QtGui, QtWidgets

from NewWindow import SecondWindow

class Window(QtWidgets.QWidget):
    textChanged = QtCore.pyqtSignal(str)

    def __init__(self, parent=None):
        super(Window, self).__init__(parent)

        self.img =QtWidgets.QLabel()
        self.relleno=QtWidgets.QLabel()
        self.btn_load = QtWidgets.QPushButton('Load')
        self.width = 400
        self.height = 150


        self.init_ui()

    def init_ui(self):
        self.img.setPixmap(QtGui.QPixmap("someimage.png"))

        h_final = QtWidgets.QHBoxLayout(self)
        h_final.addWidget(self.img)
        h_final.addWidget(self.btn_load)

        self.btn_load.clicked.connect(self.loadafile)
        self.setWindowTitle('This is main window')
        self.setGeometry(600,150,self.width,self.height)

        self.show()

    @QtCore.pyqtSlot()
    def loadafile(self):
        filename, _  = QtWidgets.QFileDialog.getOpenFileName(self, 'Open File', os.getenv('HOME'))
        with open(filename, 'r') as f:
            file_text = f.read()
            self.textChanged.emit(file_text)

def main():
    app = QtWidgets.QApplication(sys.argv)
    main = Window()
    s = SecondWindow()
    main.textChanged.connect(s.text.append)
    sys.exit(app.exec_())

if __name__ == '__main__':
    main()

我可以为一个对象提供多个信号吗？@lissethamc您可以获得所需的信号，我建议您在询问之前尝试：-）