Question

我 figure想如何在窗口发生变化时引发一场事件,但当我阅读数据库的窗户信息时,情况就是如此。在窗户缩小时,我想写到数据库,因此,我要引发我的事,即点击减子,而不是仅仅在窗户变化的时候。

Answer 1

下面的文字涉及的有:

from PyQt4 import QtGui, QtCore

class Window(QtGui.QWidget):
    def __init__(self):
        QtGui.QWidget.__init__(self)

    def changeEvent(self, event):
        if event.type() == QtCore.QEvent.WindowStateChange:
            if self.windowState() & QtCore.Qt.WindowMinimized:
                print( changeEvent: Minimised )
            elif event.oldState() & QtCore.Qt.WindowMinimized:
                print( changeEvent: Normal/Maximised/FullScreen )
        QtGui.QWidget.changeEvent(self, event)

if __name__ ==  __main__ :

    import sys
    app = QtGui.QApplication(sys.argv)
    window = Window()
    window.resize(300, 300)
    window.show()
    sys.exit(app.exec_())

Answer 2

您可使用http://developer.qt.nokia.com/doc/qt-4.8/qwidget.html#hideEvent”rel=“nofollow”QWidget.hideEvent, 并自查询。封闭窗口时也叫到。例:

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

import sys
from PyQt4.QtGui import *


class HookMinimize(QWidget):
    def hideEvent(self, event):
        QWidget.hideEvent(self, event)
        if self.isMinimized():
            print "Doing background task"


if __name__ ==  __main__ :
    app = QApplication(sys.argv)
    window = HookMinimize()
    window.resize(300, 400)
    window.show()
    sys.exit(app.exec_())

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