Python 和 PyQt：捕获最小化事件

Question

呃...有人可以帮我吗？我似乎无法捕获我创建的小部件的最小化事件。我尝试了我能找到的每一篇文章中的解决方案，但它似乎不适用于我的代码。在我尝试的解决方案之一中，窗口最小化并显示系统托盘图标，但应用程序图标在任务栏上仍然可见。我似乎不知道我应该做什么或者我在这里错过了什么。我正在使用 Python 2.7 和 PyQt 4.11。我的操作系统是 Windows 7，所以我很确定这不是操作系统问题。如果有人能在这里帮助我，我将非常感激。

这是代码。

from PyQt4 import QtCore, QtGui
from PyQt4.QtGui import *
from PyQt4.QtCore import *

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_Form(QtGui.QWidget):
    def __init__(self):
        QtGui.QWidget.__init__(self)
        self.setupUi(self)
    def setupUi(self, Form):
        Form.setObjectName(_fromUtf8("Form"))
        Form.resize(385, 277)
        self.gridLayout = QtGui.QGridLayout(Form)
        self.gridLayout.setObjectName(_fromUtf8("gridLayout"))
        self.radioButton = QtGui.QRadioButton(Form)
        self.radioButton.setObjectName(_fromUtf8("radioButton"))
        self.gridLayout.addWidget(self.radioButton, 0, 1, 1, 1)
        self.lineEdit = QtGui.QLineEdit(Form)
        self.lineEdit.setObjectName(_fromUtf8("lineEdit"))
        self.gridLayout.addWidget(self.lineEdit, 1, 0, 1, 1)
        self.pushButton = QtGui.QPushButton(Form)
        self.pushButton.setObjectName(_fromUtf8("pushButton"))
        self.gridLayout.addWidget(self.pushButton, 1, 1, 1, 1)
        self.listWidget = QtGui.QListWidget(Form)
        self.listWidget.setEditTriggers(QtGui.QAbstractItemView.DoubleClicked|QtGui.QAbstractItemView.EditKeyPressed|QtGui.QAbstractItemView.SelectedClicked)
        self.listWidget.setSelectionBehavior(QtGui.QAbstractItemView.SelectItems)
        self.listWidget.setMovement(QtGui.QListView.Snap)
        self.listWidget.setUniformItemSizes(False)
        self.listWidget.setObjectName(_fromUtf8("listView"))
        self.gridLayout.addWidget(self.listWidget, 2, 0, 1, 2)
        #system tray
        self.systemTrayIcon = QtGui.QSystemTrayIcon()
        self.systemTrayIcon.setIcon(QtGui.QIcon(":/images/images/mad-icon.jpg"))
        self.systemTrayIcon.setVisible(True)
        self.systemTrayIcon.activated.connect(self.sysTrayIconActivated)

        self.retranslateUi(Form)
        QtCore.QMetaObject.connectSlotsByName(Form)
    def retranslateUi(self, Form):
        Form.setWindowTitle(_translate("Form", "Form", None))
        self.radioButton.setText(_translate("Form", "monitor clipboard", None))
        self.pushButton.setText(_translate("Form", "Add", None))

    #when system tray icon is clicked, if window is visible, then hide. if it is not visible, then show
    def sysTrayIconActivated(self, reason):
        if reason == QtGui.QSystemTrayIcon.Trigger:
            if Form.isHidden():
                Form.show()
            else:
                Form.hide()

if __name__ == "__main__":
    import sys
    app = QtGui.QApplication(sys.argv)
    Form = QtGui.QWidget()
    ui = Ui_Form()
    ui.setupUi(Form)
    Form.show()
    sys.exit(app.exec_()) 

Answer 1

这段代码应该可以工作

def changeEvent(self, event):
    if event.type() == QEvent.WindowStateChange:
        if event.oldState() and Qt.WindowMinimized:
            print("WindowMinimized")
        elif event.oldState() == Qt.WindowNoState or self.windowState() == Qt.WindowMaximized:
            print("WindowMaximized")