如何在不使用.setModal（True）的情况下使一个窗口阻止另一个窗口

Question

如果右键单击主窗口，则显示QInputDialog。我希望QInputDialog在主窗口打开时阻止它。怎么做到这一点？

from PyQt4 import QtCore, QtGui
app = QtGui.QApplication([])
class AppWindow(QtGui.QMainWindow):
    def __init__(self):
        super(AppWindow, self).__init__()
        mainWidget=QtGui.QWidget()
        self.setCentralWidget(mainWidget)
        mainLayout = QtGui.QVBoxLayout()
        mainWidget.setLayout(mainLayout)
        frame=QtGui.QFrame()
        frame.setContextMenuPolicy(QtCore.Qt.CustomContextMenu)
        frame.connect(frame, QtCore.SIGNAL("customContextMenuRequested(QPoint)" ), self.up)
        mainLayout.addWidget(frame)

        self.modal=QtGui.QInputDialog()       

    def up(self, QPos):
        self.modal.move(QtGui.QCursor.pos())
        self.modal.show()
        self.modal.raise_()

window=AppWindow()
window.show()
sys.exit(app.exec_())

Answer 1

好的，这个解决方案可以通过使用方法QWidget.setWindowModality (self, Qt.WindowModality windowModality)来解决。模态窗口是阻止其他窗口输入的窗口。请注意，不会阻止作为模态窗口子窗口的窗口。

在初始方法中添加此行;

self.modal.setWindowModality(QtCore.Qt.ApplicationModal)

已完成的代码是;

import sys
from PyQt4 import QtCore, QtGui
class AppWindow (QtGui.QMainWindow):
    def __init__ (self):
        super(AppWindow, self).__init__()
        mainWidget = QtGui.QWidget(self)
        self.setCentralWidget(mainWidget)
        mainLayout = QtGui.QVBoxLayout()
        mainWidget.setLayout(mainLayout)
        frame = QtGui.QFrame()
        frame.setContextMenuPolicy(QtCore.Qt.CustomContextMenu)
        frame.connect(frame, QtCore.SIGNAL("customContextMenuRequested(QPoint)" ), self.up)
        mainLayout.addWidget(frame)
        self.modal = QtGui.QInputDialog(self)
        self.modal.setWindowModality(QtCore.Qt.ApplicationModal)

    def up (self, QPos):
        self.modal.move(QtGui.QCursor.pos())
        self.modal.show()
        self.modal.raise_()

app = QtGui.QApplication([])
window = AppWindow()
window.show()
sys.exit(app.exec_())

参考方法：http://pyqt.sourceforge.net/Docs/PyQt4/qwidget.html#setWindowModality

参考枚举：http://pyqt.sourceforge.net/Docs/PyQt4/qt.html#WindowModality-enum

---

此致

Answer 2

在坚果壳中，这是基本方法。我创建了第二个窗口（一个框架），其中包含一个表格小部件，我的类名称是TableWindow。在主窗口文件中导入。点击一下按钮，我调用下面的功能。

    def call_table_window(self):
        self.frame = QtGui.QFrame()
        self.window_table = TableWindow()
        self.window_table.setupUi(self.frame)

        #This stops the user to switch to the main window. He has to close 
        #the 2nd window first.
        self.frame.setWindowModality(QtCore.Qt.ApplicationModal)
        self.frame.show()