Python 使用 QGridLayout 不添加小部件

Question

我是 Qt5 的新手，我有一个简单的 QGridLayout 布局掩码。我想用 window

调整大小的小部件创建一个 windows

这是代码

import sys
from PyQt5 import QtCore, QtGui, QtWidgets
from PyQt5.QtWidgets import QFileDialog ,QVBoxLayout,QGroupBox,QGridLayout

class MainWindow(QtWidgets.QMainWindow, QtWidgets.QFileDialog, QtWidgets.QLineEdit):
    def __init__(self):
        super().__init__()

        self.title = "Calcolo Hash"
        self.top = 100
        self.left = 100
        self.width = 800
        self.height = 330

        self.InitWindow()

    def InitWindow(self):
        self.setWindowIcon(QtGui.QIcon("icona_aprie.png"))
        self.setWindowTitle(self.title)
        self.setGeometry(self.top, self.left, self.width, self.height)

        self.creamaschera()

        self.show()

    def creamaschera(self):
        print ("creazione maschera")
        layout = QtWidgets.QGridLayout()
        self.txtcartella = QtWidgets.QLineEdit()
        self.lblprova = QtWidgets.QLabel("Please enter new name:")
        # self.txtcartella.setGeometry(QtCore.QRect(10, 10, 301, 20))
        # self.txtcartella.setObjectName("txtcartella")
        layout.addWidget(self.lblprova,0,0)
        layout.addWidget(self.txtcartella,0,1)

        self.setLayout(layout)
        # self.horizontalGroupBox.setLayout(layout)

if __name__ == "__main__":
    app = QtWidgets.QApplication(sys.argv)
    w = MainWindow()
    #w.show()
    sys.exit(app.exec_())

但是当我运行时，掩码是空的。我用 Qt5 设计器制作基础并将其转换为 python。我想在最佳锻炼中重构 class。哪里出错了？

Answer 1

您应该在小部件中设置布局，而不是将其设置到 MainWindow，因为您使用的是 MainWindow class 本身，并且在访问 class MainWindow 的方法和属性时，您可以更具体

import sys
from PyQt5 import QtCore, QtGui
from PyQt5.QtWidgets import (QLineEdit, QMainWindow, QWidget,
                             QGridLayout, QLabel, QApplication)


class MainWindow(QMainWindow):
    def __init__(self, *args, **kwargs):
        super(MainWindow, self).__init__(*args, **kwargs)
        self.title = "Calcolo Hash"
        self.top = 100
        self.left = 100
        self.width = 800
        self.height = 330
        self.InitWindow()
    def InitWindow(self):
        self.setWindowIcon(QtGui.QIcon("icona_aprie.png"))
        self.setWindowTitle(self.title)
        self.setGeometry(self.top, self.left, self.width, self.height)

        self.creamaschera()

    def creamaschera(self):
        print("creazione maschera")
        Layout = QGridLayout()
        self.txtcartella = QLineEdit()
        self.lblprova = QLabel("Enter Your Name")
        self.lblprova.setGeometry(QtCore.QRect(15, 15, 301, 20))
        self.txtcartella.setObjectName("txtcartella")
        Layout.addWidget(self.lblprova, 0, 0)
        Layout.addWidget(self.txtcartella, 0, 1)
        # Widget to setLayout in it since you are using MainWindow as an Class
        widget = QWidget()
        widget.setLayout(Layout)
        # SetCentralWidget without this widget won't be placed
        self.setCentralWidget(widget)
        # self.horizontalGroupBox.setLayout(layout)


if __name__ == "__main__":
    app = QApplication(sys.argv)
    MainWindow = MainWindow()
    MainWindow.show()
    sys.exit(app.exec_())

Python 使用 QGridLayout 不添加小部件

Python using QGridLayout not add widget

python

qt-designer

pyqt5