[FIXED] How to make one window to block another without using .setModal(True)

Issue

If main window right-clicked a QInputDialog shows up. I want QInputDialog to block main window while it is open. How to achieve this?

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_())

Solution

OK, This solution can be solve by use method QWidget.setWindowModality (self, Qt.WindowModality windowModality) . A modal window is one that blocks input to other windows. Note that windows that are children of a modal window are not blocked.

Add this line in your initial method;

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

Completed code is;

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_())

Reference method : http://pyqt.sourceforge.net/Docs/PyQt4/qwidget.html#setWindowModality

Reference enum : http://pyqt.sourceforge.net/Docs/PyQt4/qt.html#WindowModality-enum

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Regards,

Answered By - Kitsune Meyoko