PyQt边缘透阴影明窗口实现

来源：互联网发布：阿里云学生专区编辑：程序博客网时间：2024/06/05 14:07

实现类似QQ的无边框窗口界面的边缘效果

主要有几点：
第一，窗口要设置称无边框：
self.setWindowFlags(Qt.FramelessWindowHint)
第二，窗口要设置成透明:
self.setAttribute(Qt.WA_TranslucentBackground,True)
第三，就是主要实现方法了，主要是在paintEvent方法中进行绘制实现的：

def paintEvent(self,event):    m = 9    path = QPainterPath()    path.setFillRule(Qt.WindingFill)    path.addRect(m, m, self.width()-m*2, self.height()-m*2)    painter = QPainter(self)    #painter.setRenderHint(QPainter.Antialiasing, True)    painter.fillPath(path, QBrush(Qt.white))     color = QColor(100, 100, 100, 30)    #for(int i=0; i<10; i++)        for i in range(m):        path = QPainterPath()        path.setFillRule(Qt.WindingFill)        path.addRoundRect(m-i, m-i, self.width()-(m-i)*2, self.height()-(m-i)*2,1,1)        color.setAlpha(90 - math.sqrt(i)*30)        painter.setPen(QPen(color,1,Qt.SolidLine))        painter.drawRoundRect(QRect(m-i, m-i, self.width()-(m-i)*2, self.height()-(m-i)*2), 0,0)

可以修改边缘效果的宽度：m的值，可以看到这个方法是先先将除了边缘m宽度的整个窗口填充为白色（可以自定义），然后利用一个for循环，在外围绘制了m条线，而且由内到外逐渐变得透明。

下面贴上源代码（可以直接运行），供小伙伴们参考和改进。

#coding:utf-8'''Created on 2015��8��1��@author: guowu'''from PyQt4.QtGui import QWidget, QApplication, QPainterPath, QPainter, QBrush,\    QColor, QPenfrom PyQt4.QtCore import Qt, QSize, QRect, QPointimport sysimport mathclass TestFrame(QWidget):    def __init__(self,parent=None):        super(TestFrame,self).__init__(parent)        self.setWindowFlags(Qt.FramelessWindowHint)        self.setAttribute(Qt.WA_TranslucentBackground,True)        self.setFixedSize(QSize(500,500))        self.currentPos = None        def mousePressEvent(self,event):        self.currentPos = event.pos()        def mouseMoveEvent(self,event):        self.move(QPoint(self.pos()+event.pos()-self.currentPos))            def paintEvent(self,event):        m = 9                path = QPainterPath()        path.setFillRule(Qt.WindingFill)        path.addRect(m, m, self.width()-m*2, self.height()-m*2)                painter = QPainter(self)        #painter.drawLine(QLineF)        #painter.setRenderHint(QPainter.Antialiasing, True)        painter.fillPath(path, QBrush(Qt.white))             color = QColor(100, 100, 100, 30)        #for(int i=0; i<10; i++)                for i in range(m):            path = QPainterPath()            path.setFillRule(Qt.WindingFill)            path.addRoundRect(m-i, m-i, self.width()-(m-i)*2, self.height()-(m-i)*2,1,1)            color.setAlpha(90 - math.sqrt(i)*30)            painter.setPen(QPen(color,1,Qt.SolidLine))            painter.drawRoundRect(QRect(m-i, m-i, self.width()-(m-i)*2, self.height()-(m-i)*2), 0,0)           #             path = QPainterPath()#             path.setFillRule(Qt.WindingFill)#             path.addRect(m-i, m-i, self.width()-(m-i)*2, self.height()-(m-i)*2)#             color.setAlpha(90 - math.sqrt(i)*30)#             painter.setPen(QPen(color,1))#             painter.drawPath(path)                     if __name__ == "__main__":    app = QApplication(sys.argv)    c = TestFrame()    c.show()    app.exec_()

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