PyQt5 MainWindow resize()调用不起作用

Question

我有一个PyQt5 GUI应用程序主窗口，它根据屏幕大小设置几何图形。当我调用toogleLogWindow()函数时，hLayoutWidget_error的可见性属性会更改，但不会调整窗口大小。当我通过单击右上角的恢复按钮手动恢复主窗口时，调整大小功能会起作用。有人能帮我理解这种行为吗？默认情况下不检查actionToggleLogWindow状态。

import sys, os
from PyQt5 import QtCore, QtGui, QtWidgets
from PyQt5.QtCore import *
from PyQt5.QtGui import *
from PyQt5.QtWidgets import *
class MainWindow(QMainWindow):
def __init__(self):
super(MainWindow, self).__init__()
self.setupUI()
def setupUI(self):

# Set screen size parameters
for i in range(QApplication.desktop().screenCount()):
self.window_size = QApplication.desktop().availableGeometry(i).size()
self.resize(self.window_size)
self.move(QPoint(0, 0))

self._button = QtWidgets.QPushButton(self)
self._button.setText('Test Me')

self._editText = QtWidgets.QComboBox(self)
self._editText.setEditable(True)
self._editText.addItem("")
self._editText.setGeometry(QtCore.QRect(240, 40, 113, 21))
# Connect signal to slot
self._button.clicked.connect(self.toogleLogWindow)


def toogleLogWindow(self):

if self._editText.currentText() == "0":
h = self.window_size.height()
w = int(self.window_size.width()/2)
self.resize(w,h)
elif self._editText.currentText() == "1":
h = self.window_size.height()
w = int(self.window_size.width())
self.resize(w,h)
else:
pass


def get_main_app(argv=[]):
app = QApplication(argv)
win = MainWindow()
win.show()
return app, win
def main():
app, _win = get_main_app(sys.argv)
return app.exec_()
if __name__ == '__main__':
sys.exit(main())

Answer 1

需要注意的是：

• 如果在显示之前设置窗口的最大大小，然后再显示，则相当于最大化窗口。

• 当窗口最大化时，除非将其恢复到以前的状态，否则无法更改其大小。例如，如果手动更改窗口的大小，直到它处于正常状态，则可以只更改大小。

因此，对于这种情况，有几种替代方案：

• 不要设置屏幕的全尺寸：

  self.window_size = QApplication.desktop().availableGeometry(i).size() - QSize(10, 10)
  

• 显示后设置大小：

  class MainWindow(QMainWindow):
  def __init__(self):
  super(MainWindow, self).__init__()
  self.setupUI()
  def setupUI(self):
  # Set screen size parameters
  for i in range(QApplication.desktop().screenCount()):
  self.window_size = QApplication.desktop().availableGeometry(i).size()
  self._button = QPushButton(self)
  self._button.setText("Test Me")
  self._editText = QComboBox(self)
  self._editText.setEditable(True)
  self._editText.addItem("")
  self._editText.setGeometry(QRect(240, 40, 113, 21))
  # Connect signal to slot
  self._button.clicked.connect(self.toogleLogWindow)
  def init_geometry(self):
  self.resize(self.window_size)
  self.move(QPoint(0, 0))
  def toogleLogWindow(self):
  if self._editText.currentText() == "0":
  h = self.window_size.height()
  w = int(self.window_size.width() / 2)
  self.resize(w, h)
  elif self._editText.currentText() == "1":
  h = self.window_size.height()
  w = int(self.window_size.width())
  self.resize(w, h)
  else:
  pass
  
  def get_main_app(argv=[]):
  app = QApplication(argv)
  win = MainWindow()
  win.show()
  win.init_geometry()
  return app, win