QPropertyAnimation不适用于子窗口小部件 [英] QPropertyAnimation doesn't work with a child widget

问题描述

以下代码未按预期为按钮设置动画。但是，如果该按钮是独立按钮，则可以使用，当它是子窗口小部件时，它将停止工作。我在这里做错了什么？

The below code doesn't animate the button as expected. But it works if the button is stand alone and stops working when it is a child widget. What am I doing wrong here?

我正在Ubuntu上尝试此操作。

I'm trying this on Ubuntu.

class TestWindow(QtGui.QWidget):

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

        self.button = QtGui.QPushButton("Ok")
        self.button.setParent(self)
        self.button.setGeometry(QtCore.QRect(0,0,50,50))
        self.button.clicked.connect(self.anim)

    def anim(self):

        animation = QtCore.QPropertyAnimation(self.button, "geometry")
        animation.setDuration(10000)
        animation.setStartValue(QtCore.QRect(0,0,0,0))
        animation.setEndValue(QtCore.QRect(0,0,200,200))
        animation.start()

if __name__ == '__main__':
        app = QtGui.QApplication(sys.argv)

        r = TestWindow()
        r.show()

        sys.exit(app.exec_())

推荐答案

我刚刚在Ubu上尝试过使用PySide的ntu 10.04。尝试保留对动画对象的引用，它在此处解决了问题：

I've just tried it on Ubuntu 10.04 with PySide. Try to keep a reference to your animation object, it solved the problem here:

def anim(self):

    animation = QtCore.QPropertyAnimation(self.button, "geometry")
    animation.setDuration(10000)
    animation.setStartValue(QtCore.QRect(0,0,0,0))
    animation.setEndValue(QtCore.QRect(0,0,200,200))
    animation.start()

    self.animation = animation

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