我在Qt Designer中设计了一个对话框，并设置为非模态，启动时始终是模态的。我使用的是OS X El Capitan，Python 3.5.1，Qt 5.4.2，pyqt4。
这些代码段显示了我在做什么：
from PyQt4 import QtCore, QtGui
try:
_fromUtf8 = QtCore.QString.fromUtf8
except AttributeError:
def _fromUtf8(s):
return s
try:
_encoding = QtGui.QApplication.UnicodeUTF8
def _translate(context, text, disambig):
return QtGui.QApplication.translate(context, text, disambig, _encoding)
except AttributeError:
def _translate(context, text, disambig):
return QtGui.QApplication.translate(context, text, disambig)
class Ui_purchaseInfoDialog(object):
def setupUi(self, purchaseInfoDialog):
purchaseInfoDialog.setObjectName(_fromUtf8("purchaseInfoDialog"))
purchaseInfoDialog.setWindowModality(QtCore.Qt.NonModal)
purchaseInfoDialog.resize(837, 377)
purchaseInfoDialog.setSizeGripEnabled(True)
purchaseInfoDialog.setModal(False)
self.purchaseInfoButtonBox = QtGui.QDialogButtonBox(purchaseInfoDialog)
self.purchaseInfoButtonBox.setGeometry(QtCore.QRect(710, 330, 101, 32))
self.purchaseInfoButtonBox.setOrientation(QtCore.Qt.Horizontal)
self.purchaseInfoButtonBox.setStandardButtons(QtGui.QDialogButtonBox.Close)
self.purchaseInfoButtonBox.setObjectName(_fromUtf8("purchaseInfoButtonBox"))
self.purchaseInfoTable = QtGui.QTableWidget(purchaseInfoDialog)
self.purchaseInfoTable.setGeometry(QtCore.QRect(10, 50, 911, 271))
self.purchaseInfoTable.setObjectName(_fromUtf8("purchaseInfoTable"))
self.purchaseInfoTable.setColumnCount(9)
self.purchaseInfoTable.setRowCount(0)
item = QtGui.QTableWidgetItem()
self.purchaseInfoTable.setHorizontalHeaderItem(0, item)
item = QtGui.QTableWidgetItem()
self.purchaseInfoTable.setHorizontalHeaderItem(1, item)
item = QtGui.QTableWidgetItem()
self.purchaseInfoTable.setHorizontalHeaderItem(2, item)
item = QtGui.QTableWidgetItem()
self.purchaseInfoTable.setHorizontalHeaderItem(3, item)
item = QtGui.QTableWidgetItem()
self.purchaseInfoTable.setHorizontalHeaderItem(4, item)
item = QtGui.QTableWidgetItem()
self.purchaseInfoTable.setHorizontalHeaderItem(5, item)
item = QtGui.QTableWidgetItem()
self.purchaseInfoTable.setHorizontalHeaderItem(6, item)
item = QtGui.QTableWidgetItem()
self.purchaseInfoTable.setHorizontalHeaderItem(7, item)
item = QtGui.QTableWidgetItem()
self.purchaseInfoTable.setHorizontalHeaderItem(8, item)
self.piPartLabel = QtGui.QLabel(purchaseInfoDialog)
self.piPartLabel.setGeometry(QtCore.QRect(20, 20, 71, 16))
self.piPartLabel.setObjectName(_fromUtf8("piPartLabel"))
self.piPartdescriptionLabel = QtGui.QLabel(purchaseInfoDialog)
self.piPartdescriptionLabel.setGeometry(QtCore.QRect(120, 20, 191, 16))
self.piPartdescriptionLabel.setObjectName(_fromUtf8("piPartdescriptionLabel"))
self.poFromSelectionPushButton = QtGui.QPushButton(purchaseInfoDialog)
self.poFromSelectionPushButton.setGeometry(QtCore.QRect(540, 330, 171, 32))
self.poFromSelectionPushButton.setObjectName(_fromUtf8("poFromSelectionPushButton"))
self.retranslateUi(purchaseInfoDialog)
QtCore.QObject.connect(self.purchaseInfoButtonBox, QtCore.SIGNAL(_fromUtf8("accepted()")), purchaseInfoDialog.accept)
QtCore.QObject.connect(self.purchaseInfoButtonBox, QtCore.SIGNAL(_fromUtf8("rejected()")), purchaseInfoDialog.reject)
#QtCore.QObject.connect(self.poFromSelectionPushButton, QtCore.SIGNAL(_fromUtf8("clicked()")), purchaseInfoDialog.poFromSelection)
QtCore.QMetaObject.connectSlotsByName(purchaseInfoDialog)
def retranslateUi(self, purchaseInfoDialog):
purchaseInfoDialog.setWindowTitle(_translate("purchaseInfoDialog", "Purchase History", None))
item = self.purchaseInfoTable.horizontalHeaderItem(0)
item.setText(_translate("purchaseInfoDialog", "#", None))
item = self.purchaseInfoTable.horizontalHeaderItem(1)
item.setText(_translate("purchaseInfoDialog", "P.O. #", None))
item = self.purchaseInfoTable.horizontalHeaderItem(2)
item.setText(_translate("purchaseInfoDialog", "Vendor", None))
item = self.purchaseInfoTable.horizontalHeaderItem(3)
item.setText(_translate("purchaseInfoDialog", "P.O. Date", None))
item = self.purchaseInfoTable.horizontalHeaderItem(4)
item.setText(_translate("purchaseInfoDialog", "Mfg", None))
item = self.purchaseInfoTable.horizontalHeaderItem(5)
item.setText(_translate("purchaseInfoDialog", "Mpn", None))
item = self.purchaseInfoTable.horizontalHeaderItem(6)
item.setText(_translate("purchaseInfoDialog", "Qty", None))
item = self.purchaseInfoTable.horizontalHeaderItem(7)
item.setText(_translate("purchaseInfoDialog", "Price", None))
item = self.purchaseInfoTable.horizontalHeaderItem(8)
item.setText(_translate("purchaseInfoDialog", "Dock", None))
self.piPartLabel.setText(_translate("purchaseInfoDialog", "Part", None))
self.piPartdescriptionLabel.setText(_translate("purchaseInfoDialog", "Description", None))
self.poFromSelectionPushButton.setText(_translate("purchaseInfoDialog", "P.O. From Selection", None))
#
# PURCHASE INFO (HISTORY) Dialog
#
# Sub-class Ui_purchaseInfoDialog
class PurchaseInfoDialog(QDialog, Ui_purchaseInfoDialog):
def __init__(self):
QDialog.__init__((self))
self.setModal(False)
self.ui.orderPartButton.clicked.connect(lambda: self.orderPartButtonClicked())
#
# Parts Slots
#
#
@pyqtSlot()
def orderPartButtonClicked(self):
selectedPart = MainWindow.ui.partShortagesTable.selectedItems()
if (selectedPart):
part = selectedPart[0].text()
aPurchaseInfoDialog = PurchaseInfoDialog()
pidUi = Ui_purchaseInfoDialog()
pidUi.setupUi(aPurchaseInfoDialog)
refreshPurchaseInfoTable(self, pidUi.purchaseInfoTable, pidUi.piPartLabel, pidUi.piPartdescriptionLabel, part, pathToArchive)
#aPurchaseInfoDialog.setWindowModality(QtCore.Qt.NonModal)
result = aPurchaseInfoDialog.exec_() # Launch the Purchase Info Dialog. result = 0 for Close
#aPurchaseInfoDialog.show()
在我的环境中是否存在pyqt4的问题（我在Linux下尝试了相同的结果）或者我在某个地方错过了一些设置？
演示：
import sys
from PyQt4 import QtCore
from PyQt4.QtCore import *
from PyQt4.QtGui import *
class Dialog1(QDialog):
def __init__(self):
QDialog.__init__(self)
self.setModal(True)
class Dialog2(QDialog):
def __init__(self):
QDialog.__init__(self)
self.setModal(False)
def window():
app = QApplication(sys.argv)
w = QWidget()
b = QPushButton(w)
b.setText("Modal Dialog")
b.move(15, 25)
b.clicked.connect(showdialog1)
c = QPushButton(w)
c.setText("Modless Dialog")
c.move(15, 75)
c.clicked.connect(showdialog2)
w.setWindowTitle("PyQt Dialog demo")
w.resize(200, 150)
w.show()
sys.exit(app.exec_())
def showdialog1():
# d = QDialog()
d = Dialog1()
#d.setWindowModality(QtCore.Qt.Modal)
b1 = QPushButton("Modal Dialog", d)
b1.move(50, 50)
d.setWindowTitle("Modal Dialog")
d.setWindowModality(Qt.ApplicationModal)
d.exec_()
def showdialog2():
# d = QDialog()
d = Dialog2()
d.setWindowModality(QtCore.Qt.NonModal)
b1 = QPushButton("ok", d)
b1.move(50, 50)
d.setWindowTitle("Modeless Dialog")
d.setWindowModality(Qt.ApplicationModal)
d.exec_()
if __name__ == '__main__':
window()
答案 0 :(得分：3)
由于个人偏好，我重新安排了一些代码（我确定你可以把它放回去没问题），现在一个是模态的，另一个是非模态的。
创建非模态窗口时，必须在QDialog类的实例化中提供父QWidget。然后，使用QDialog.exec_()而不是QDialog.show()。这显示了非模态窗口，但允许原始父级在某种意义上继续运行。使用exec_()将始终生成模态窗口，即使您将其设置为非模态也是如此。这是文档：http://pyqt.sourceforge.net/Docs/PyQt4/qdialog.html
以下是代码：
class Dialog1(QDialog):
def __init__(self):
QDialog.__init__(self)
self.setModal(True)
class Dialog2(QDialog):
def __init__(self, parent):
QDialog.__init__(self, parent)
self.setModal(0)
b1 = QPushButton("ok", self)
b1.move(50, 50)
b1.clicked.connect(self.exit)
self.setWindowTitle("Nonmodal Dialog")
self.show()
def exit(self):
self.close()
def window():
app = QApplication(sys.argv)
w = QWidget()
b = QPushButton(w)
b.setText("Modal Dialog")
b.move(15, 25)
b.clicked.connect(showdialog1)
c = QPushButton(w)
c.setText("Nonmodal Dialog")
c.move(15, 75)
c.clicked.connect(lambda: showdialog2(w))
w.setWindowTitle("PyQt Dialog demo")
w.resize(200, 150)
w.show()
sys.exit(app.exec_())
def showdialog1():
# d = QDialog()
d = Dialog1()
#d.setWindowModality(QtCore.Qt.Modal)
b1 = QPushButton("Modal Dialog", d)
b1.move(50, 50)
d.setWindowTitle("Modal Dialog")
d.setWindowModality(Qt.ApplicationModal)
d.exec_()
def showdialog2(w):
# d = QDialog()
Dialog2(w)
if __name__ == '__main__':
window()