python - 在带有 QT4 的 Python 中使用像素图或图像序列制作动画

Question

我有一个小的 Python 脚本，可以创建一个透明窗口来在屏幕上显示图形，我想为该图形设置动画，但我完全不确定如何或从哪里开始。这是我至少拥有的:

import sys
from PyQt4 import QtGui, Qt, QtCore

class Transparent(QtGui.QWidget):

    def __init__(self):
        QtGui.QWidget.__init__(self)
        self.setAttribute(Qt.Qt.WA_NoSystemBackground)
        self.setAutoFillBackground(True)

        pixmap = QtGui.QPixmap("test1.gif")
                pixmap2 = QtGui.QPixmap("test2.gif")
        width = pixmap.width()
        height = pixmap.height()

        self.setWindowTitle("Status")
            self.resize(width, height)

            self.label = QtGui.QLabel(self)


        def animateEvent():
                    imgnumber = 0
                    try:
                        if imgnumber == 1:
                            self.label.setPixmap(QtGui.QPixmap("test1.gif"))
                            self.setMask(pixmap.mask())
                            imgnumber = 0
                        else:
                            self.label.setPixmap(QtGui.QPixmap("test2.gif"))
                            self.setMask(pixmap2.mask())
                            imgnumber = 1
                    finally:
                        QtCore.QTimer.singleShot(1000, animateEvent)

                animateEvent()


        def paintEvent(self,event):
        self.setAttribute(Qt.Qt.WA_NoSystemBackground)

if __name__ == "__main__":
    app = QtGui.QApplication(sys.argv)
    x = Transparent()
    x.show()
    app.exec_()

感觉它的成分正确，但像素图没有更新。

我尝试了 QMovie，但是窗口中本应透明的区域被黑色填充了。

Answer 1

从 www.daniweb.com 查看此代码并查看是否可以根据需要修改它:

import sys 
from PyQt4.QtCore import *
from PyQt4.QtGui import * 

class MoviePlayer(QWidget): 
    def __init__(self, gif, parent=None): 
        super(MoviePlayer, self).__init__(parent)

        self.setGeometry(200, 200, 400, 400)
        self.setWindowTitle("QMovie to show animated gif")

        self.movie_screen = QLabel()
        self.movie_screen.setSizePolicy(QSizePolicy.Expanding, QSizePolicy.Expanding)        
        self.movie_screen.setAlignment(Qt.AlignCenter) 

        btn_start = QPushButton("Start Animation")
        btn_start.clicked.connect(self.start) 

        btn_stop = QPushButton("Stop Animation")
        btn_stop.clicked.connect(self.stop) 

        main_layout = QVBoxLayout() 
        main_layout.addWidget(self.movie_screen)
        main_layout.addWidget(btn_start) 
        main_layout.addWidget(btn_stop)
        self.setLayout(main_layout) 

        self.movie = QMovie(gif, QByteArray(), self) 
        self.movie.setCacheMode(QMovie.CacheAll) 
        self.movie.setSpeed(100) 
        self.movie_screen.setMovie(self.movie) 


    def start(self):
        """
        Start animation
        """
        self.movie.start()

    def stop(self):
        """
        Stop the animation
        """
        self.movie.stop()


app = QApplication(sys.argv) 
player = MoviePlayer("/path/to/image.gif") 
player.show() 
sys.exit(app.exec_())