python - 如何在水平布局中调整小部件的大小

Question

当我放大 GUI 窗口时，我希望所有小部件的长度(水平)发生变化。现在，当我增大窗口时，只有行编辑会更改大小。最重要的是，我希望我的按钮和组合框更长。

import sys
from PyQt5 import QtWidgets
from PyQt5.QtWidgets import QGridLayout, QWidget, QListWidget, QLineEdit, QHBoxLayout, QPushButton


class Window(QtWidgets.QMainWindow):
    def __init__(self):
        super().__init__()
        centralWidget = QWidget()
        self.setCentralWidget(centralWidget)
        self.Search_Bar = QLineEdit(placeholderText="Search")
        self.Button = QPushButton('button')
        layout = QHBoxLayout(centralWidget)
        layout.addWidget(self.Button)
        layout.addWidget(self.Search_Bar)



if __name__ == '__main__':
    app = QtWidgets.QApplication(sys.argv)
    window = Window()
    window.show()
    sys.exit(app.exec_())

Answer 1

有两种可能的解决方案:

• 通过将小部件添加到布局来设置相同的拉伸(stretch):

  layout.addWidget(self.Button, <b>stretch=1</b>)
  layout.addWidget(self.Search_Bar, <b>stretch=1</b>)

• 设置QSizePolicy::Expanding在 sizePolicy 的水平分量上按钮:

  sp = self.Button.sizePolicy()
  sp.setHorizontalPolicy(QtWidgets.QSizePolicy.Expanding)
  self.Button.setSizePolicy(sp)