python-PyQt中透明QSplashScreen图像上的白色边框

Google,尽管我尝试过,但似乎无法弄清如何摆脱白色边框,而这种白色边框是我为QSplashScreen服务的png周围的问题.

我已经看过this article,但是我不知道如何将其转换为PyQt,或者甚至不是我想要的.

我什至尝试过分别设置一个黑白蒙版,这会导致低质量的结果,并且到处都有很多点.

有没有人发现神奇的半透明/半透明的SplashScreen,您还可以将文本数据输入到showMessage命令中？提前致谢.

我应该提到这也是Windows 7.

以下是我用作初始图像的测试PNG以及由此得到的难看的白色边框：

通过QBitmap提供黑白Alpha的另一种方法产生了这个更接近但难看的示例,其中充满了奇怪的点.代码和图像如下.

    splash_pix = QPixmap(":/images/images/PyQtSplash.png")
    splash = QSplashScreen(splash_pix, Qt.WindowStaysOnTopHint)
    splash.setMask(QBitmap(QPixmap(":/images/images/PyQtSplashAlpha.jpg")))

解决方法:

只要使用透明区域干净的图像,只需要将其蒙版传递给QSplashScreen.setMask.

该脚本可以在Linux上按预期工作：

from PyQt4 import QtGui, QtCore

def show_splash(path):
    image = QtGui.QPixmap(path)
    splash = QtGui.QSplashScreen(image)
    splash.setAttribute(QtCore.Qt.WA_DeleteOnClose)
    splash.setMask(image.mask())
    font = QtGui.QFont(splash.font())
    font.setPointSize(font.pointSize() + 5)
    splash.setFont(font)
    splash.show()
    QtGui.QApplication.processEvents()
    for count in range(1, 6):
        splash.showMessage(splash.tr('Processing %1...').arg(count),
                           QtCore.Qt.AlignBottom | QtCore.Qt.AlignLeft,
                           QtCore.Qt.white)
        QtGui.QApplication.processEvents()
        QtCore.QThread.msleep(1000)

if __name__ == '__main__':

    import sys
    app = QtGui.QApplication(sys.argv)
    show_splash(sys.argv[1])
    app.quit()

编辑

这个定制的SplashScreen类应该在Linux和Windows上产生合理的结果：

from PyQt4 import QtGui, QtCore

class SplashScreen(QtGui.QWidget):
    def __init__(self, pixmap):
        QtGui.QWidget.__init__(self)
        self._pixmap = pixmap
        self._message = QtCore.QString()
        self._color = QtGui.QColor.black
        self._alignment = QtCore.Qt.AlignLeft
        self.setWindowFlags(QtCore.Qt.FramelessWindowHint |
                            QtCore.Qt.WindowStaysOnTopHint)
        self.setAttribute(QtCore.Qt.WA_TranslucentBackground)
        self.setAttribute(QtCore.Qt.WA_DeleteOnClose)
        self.setFixedSize(self._pixmap.size())
        self.setMask(self._pixmap.mask())

    def clearMessage(self):
        self._message.clear()
        self.repaint()

    def showMessage(self, message, alignment=QtCore.Qt.AlignLeft,
                                   color=QtGui.QColor.black):
        self._message = QtCore.QString(message)
        self._alignment = alignment
        self._color = color
        self.repaint()

    def paintEvent(self, event):
        textbox = QtCore.QRect(self.rect())
        textbox.setRect(textbox.x() + 5, textbox.y() + 5,
                        textbox.width() - 10, textbox.height() - 10)
        painter = QtGui.QPainter(self)
        painter.drawPixmap(self.rect(), self._pixmap)
        painter.setPen(QtGui.QColor(self._color))
        painter.drawText(textbox, self._alignment, self._message)

    def mousePressEvent(self, event):
        self.hide()

def show_splash(path):
    image = QtGui.QPixmap(path)
    splash = SplashScreen(image)
    font = QtGui.QFont(splash.font())
    font.setPointSize(font.pointSize() + 5)
    splash.setFont(font)
    splash.show()
    QtGui.QApplication.processEvents()
    for count in range(1, 6):
        splash.showMessage(splash.tr('Processing %1...').arg(count),
                           QtCore.Qt.AlignCenter, QtCore.Qt.white)
        QtGui.QApplication.processEvents()
        QtCore.QThread.msleep(1000)
    splash.hide()
    splash.close()

if __name__ == '__main__':

    import sys
    app = QtGui.QApplication(sys.argv)
    show_splash(sys.argv[1])
    app.quit()

标签：pyqt,splash-screen,python,windows-7
来源： https://codeday.me/bug/20191202/2085317.html