我正在開發(fā)一個Qt應用程序并用這種方式改變了closeEvent virtual function的關(guān)閉行為：

class MainWindow(QMainWindow):
    def closeEvent(self, event):
            event.ignore()
            self.hide()
            self.trayicon.showMessage('Running', 'Running in the background.')

這按預期工作.如果我刪除event.ignore()應用程序按預期退出,一切都很好.

我也想控制最小化事件,所以當用戶點擊標題欄上的最小化按鈕時,我想移動窗口而不是最小化.
我無法使用hideEvent虛函數(shù),因為無論如何事件都會被發(fā)送到窗口,所以這段代碼：

def hideEvent(self, event):
    event.ignore()
    self.move(0,0)

將窗口移動到左上角然后將其最小化. event.ignore()在這里沒有效果,所以我嘗試用這種方式使用QtCore.QObject.event：

def event(self, event):
    if event.type() == QEvent.WindowStateChange:
        if self.isMinimized():
            event.ignore()
            self.move(0,0)
            return True
    return False

窗口移動但最小化.這有什么問題？如何完全覆蓋最小化事件？

解決方法:

嘗試changeEvent并過濾WindowMinimized事件,如下所示：

#!/usr/bin/env python
#-*- coding:utf-8 -*-

from PyQt4 import QtGui, QtCore

class MyWindow(QtGui.QWidget):
    def __init__(self, parent=None):
        super(MyWindow, self).__init__(parent)

        self.systemTrayIcon = QtGui.QSystemTrayIcon(self)
        self.systemTrayIcon.setIcon(QtGui.QIcon.fromTheme("face-smile"))
        self.systemTrayIcon.setVisible(True)
        self.systemTrayIcon.activated.connect(self.on_systemTrayIcon_activated)

        self.label = QtGui.QLabel(self)
        self.label.setText("Minimize me!")

        self.layoutVertical = QtGui.QVBoxLayout(self)
        self.layoutVertical.addWidget(self.label)

    @QtCore.pyqtSlot(QtGui.QSystemTrayIcon.ActivationReason)
    def on_systemTrayIcon_activated(self, reason):
        if reason == QtGui.QSystemTrayIcon.DoubleClick:
            if self.isHidden():
                self.show()

            else:
                self.hide()

    def changeEvent(self, event):
        if event.type() == QtCore.QEvent.WindowStateChange:
            if self.windowState() & QtCore.Qt.WindowMinimized:
                event.ignore()
                self.close()
                return

        super(MyWindow, self).changeEvent(event)

    def closeEvent(self, event):
        event.ignore()
        self.hide()
        self.systemTrayIcon.showMessage('Running', 'Running in the background.')

if __name__ == "__main__":
    import sys

    app = QtGui.QApplication(sys.argv)
    app.setApplicationName('MyWindow')

    main = MyWindow()
    main.show()

    sys.exit(app.exec_())