PyQt：如何隐藏QMainWindow

  • Z时代
  • 2024-01-10
  • 分类：问答

单击Dialog_01的按钮 其窗口并打开Dialog_02。单击Dialog_02的按钮应 其窗口并 Dialog_01。如何实现呢？

import sys, os
from PyQt4 import QtCore, QtGui
class Dialog_02(QtGui.QMainWindow):
    def __init__(self):
        super(Dialog_02, self).__init__()
        myQWidget = QtGui.QWidget()
        myBoxLayout = QtGui.QVBoxLayout()
        Button_02 = QtGui.QPushButton("Close THIS and Unhide Dialog 01")
        Button_02.clicked.connect(self.closeAndReturn)
        myBoxLayout.addWidget(Button_02)
        myQWidget.setLayout(myBoxLayout)
        self.setCentralWidget(myQWidget)
        self.setWindowTitle('Dialog 02')
    def closeAndReturn(self):
        self.close()
class Dialog_01(QtGui.QMainWindow):
    def __init__(self):
        super(Dialog_01, self).__init__()
        myQWidget = QtGui.QWidget()
        myBoxLayout = QtGui.QVBoxLayout()
        Button_01 = QtGui.QPushButton("Hide THIS and Open Dialog 02")
        Button_01.clicked.connect(self.callAnotherQMainWindow)
        myBoxLayout.addWidget(Button_01)
        myQWidget.setLayout(myBoxLayout)
        self.setCentralWidget(myQWidget)
        self.setWindowTitle('Dialog 01')
    def callAnotherQMainWindow(self):
        self.hide()
        self.dialog_02 = Dialog_02()
        self.dialog_02.show()
        self.dialog_02.raise_()
if __name__ == '__main__':
    app = QtGui.QApplication(sys.argv)
    dialog_1 = Dialog_01()
    dialog_1.show()
    sys.exit(app.exec_())

回答：

将第一个窗口作为第二个窗口的父窗口：

class Dialog_02(QtGui.QMainWindow):
    def __init__(self, parent):
        super(Dialog_02, self).__init__(parent)
        # ensure this window gets garbage-collected when closed
        self.setAttribute(QtCore.Qt.WA_DeleteOnClose)
    ...
    def closeAndReturn(self):
        self.close()
        self.parent().show()
class Dialog_01(QtGui.QMainWindow):
    ...
    def callAnotherQMainWindow(self):
        self.hide()
        self.dialog_02 = Dialog_02(self)
        self.dialog_02.show()

如果您希望每次都显示相同的对话框，请执行以下操作：

    def callAnotherQMainWindow(self):
        self.hide()
        if not hassattr(self, 'dialog_02'):
            self.dialog_02 = Dialog_02(self)
        self.dialog_02.show()

和hide()子窗口，而不是关闭它。

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