在 main window 上使用 QProcessAnimation

Question

我在尝试为 QMainWindow 设置动画时遇到问题。我正在尝试为侧面板制作 "slide" 动画。如果我在 "app.exec" 之前调用它，它工作正常，但是调用 "animate_out" 函数似乎什么也没做。有什么想法吗？

PS：您可以取消对底部代码的注释，以查看我正在寻找的示例。

谢谢

# PYQT IMPORTS
from PyQt4 import QtCore, QtGui
import sys
import UI_HUB


# MAIN HUB CLASS
class HUB(QtGui.QMainWindow, UI_HUB.Ui_HUB):

    def __init__(self):
        super(self.__class__, self).__init__()
        self.setupUi(self)
        self.setCentralWidget(self._Widget)
        self.setWindowTitle('HUB - 0.0')
        self._Widget.installEventFilter(self)
        self.setWindowFlags(QtCore.Qt.FramelessWindowHint | QtCore.Qt.WindowStaysOnTopHint)
        self.set_size()

        self.animate_out()

    def set_size(self):
        # Finds available and total screen resolution
        resolution_availabe = QtGui.QDesktopWidget().availableGeometry()
        ava_height = resolution_availabe.height()
        self.resize(380, ava_height)

    def animate_out(self):
        animation = QtCore.QPropertyAnimation(self, "pos")
        animation.setDuration(400)
        animation.setStartValue(QtCore.QPoint(1920, 22))
        animation.setEndValue(QtCore.QPoint(1541, 22))
        animation.setEasingCurve(QtCore.QEasingCurve.OutCubic)
        animation.start()


if __name__ == '__main__':
    app = QtGui.QApplication(sys.argv)
    form = HUB()
    form.show()
    form.raise_()
    form.activateWindow()

    # Doing the animation here works just fine
    # animation = QtCore.QPropertyAnimation(form, "pos")
    # animation.setDuration(400)
    # animation.setStartValue(QtCore.QPoint(1920, 22))
    # animation.setEndValue(QtCore.QPoint(1541, 22))
    # animation.setEasingCurve(QtCore.QEasingCurve.OutCubic)
    # animation.start()

    app.exec_()

Answer 1

问题是 animation 对象不会超过 animate_out out 函数的范围。要解决此问题，您必须将 animation 对象作为成员添加到 HUB class.

在我的示例代码中，我还将动画的创建和播放拆分为不同的函数。

# [...] skipped
class HUB(QtGui.QMainWindow, UI_HUB.Ui_HUB):

    def __init__(self):
        # [...] skipped 
        self.create_animations() # see code below
        self.animate_out()

    def set_size(self):
        # [...] skipped

    def create_animations(self):
        # set up the animation object
        self.animation = QtCore.QPropertyAnimation(self, "pos")
        self.animation.setDuration(400)
        self.animation.setStartValue(QtCore.QPoint(1920, 22))
        self.animation.setEndValue(QtCore.QPoint(1541, 22))
        self.animation.setEasingCurve(QtCore.QEasingCurve.OutCubic)

    def animate_out(self)
        # use the animation object
        self.animation.start()
# [...] skipped

在 main window 上使用 QProcessAnimation

Use QProcessAnimation on main window

python

qt

pyqt

pyside