本文实例为大家分享了Pyqt实现无边框窗口拖动及大小改变的具体代码，供大家参考，具体内容如下
做个记录，绘制边框阴影可以忽略这里不是主要
根据网上某位仁兄Qt的实现转过来的大笑，上完整代码
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# coding:utf-8 from PyQt4.Qt import *import sys PADDING=4sys.setrecursionlimit(10000) class ShadowWidget(QWidget): def __init__(self,parent=None): super(ShadowWidget,self).__init__(parent) self.setWindowFlags(Qt.FramelessWindowHint|Qt.WindowSystemMenuHint) self.setAttribute(Qt.WA_TranslucentBackground) self.SHADOW_WIDTH=0 #边框距离 self.isLeftPressDown = False #鼠标左键是否按下 self.dragPosition=0 #拖动时坐标 self.Numbers = self.enum(UP=0, DOWN=1, LEFT=2, RIGHT=3, LEFTTOP=4, LEFTBOTTOM=5, RIGHTBOTTOM=6, RIGHTTOP=7, NONE=8) #枚举参数 self.setMinimumHeight(500) #窗体最小高度 self.setMinimumWidth(1000) #窗体最小宽度 self.dir=self.Numbers.NONE #初始鼠标状态 self.setMouseTracking(True) #绘制边框阴影 def drawShadow(self,painter): #绘制左上角、左下角、右上角、右下角、上、下、左、右边框 self.pixmaps=QStringList() self.pixmaps.append(QString("./img/border/left_top.png")) self.pixmaps.append(QString("./img/border/left_bottom.png")) self.pixmaps.append(QString("./img/border/right_top.png")) self.pixmaps.append(QString("./img/border/right_bottom.png")) self.pixmaps.append(QString("./img/border/top_mid.png")) self.pixmaps.append(QString("./img/border/bottom_mid.png")) self.pixmaps.append(QString("./img/border/left_mid.png")) self.pixmaps.append(QString("./img/border/right_mid.png")) painter.drawPixmap(0, 0, self.SHADOW_WIDTH, self.SHADOW_WIDTH, QPixmap(self.pixmaps[0])) #左上角 painter.drawPixmap(self.width()-self.SHADOW_WIDTH, 0, self.SHADOW_WIDTH, self.SHADOW_WIDTH, QPixmap(self.pixmaps[2])) #右上角 painter.drawPixmap(0,self.height()-self.SHADOW_WIDTH, self.SHADOW_WIDTH, self.SHADOW_WIDTH, QPixmap(self.pixmaps[1])) #左下角 painter.drawPixmap(self.width()-self.SHADOW_WIDTH, self.height()-self.SHADOW_WIDTH, self.SHADOW_WIDTH, self.SHADOW_WIDTH, QPixmap(self.pixmaps[3])) #右下角 painter.drawPixmap(0, self.SHADOW_WIDTH, self.SHADOW_WIDTH, self.height()-2*self.SHADOW_WIDTH, QPixmap(self.pixmaps[6]).scaled(self.SHADOW_WIDTH, self.height()-2*self.SHADOW_WIDTH)) #左 painter.drawPixmap(self.width()-self.SHADOW_WIDTH, self.SHADOW_WIDTH, self.SHADOW_WIDTH, self.height()-2*self.SHADOW_WIDTH, QPixmap(self.pixmaps[7]).scaled(self.SHADOW_WIDTH, self.height()- 2*self.SHADOW_WIDTH)) #右 painter.drawPixmap(self.SHADOW_WIDTH, 0, self.width()-2*self.SHADOW_WIDTH, self.SHADOW_WIDTH, QPixmap(self.pixmaps[4]).scaled(self.width()-2*self.SHADOW_WIDTH, self.SHADOW_WIDTH)) #上 painter.drawPixmap(self.SHADOW_WIDTH, self.height()-self.SHADOW_WIDTH, self.width()-2*self.SHADOW_WIDTH, self.SHADOW_WIDTH, QPixmap(self.pixmaps[5]).scaled(self.width()-2*self.SHADOW_WIDTH, self.SHADOW_WIDTH)) #下 #枚举参数 def enum(self,**enums): return type('Enum', (), enums) def region(self,cursorGlobalPoint): #获取窗体在屏幕上的位置区域，tl为topleft点，rb为rightbottom点 rect = self.rect() tl = self.mapToGlobal(rect.topLeft()) rb = self.mapToGlobal(rect.bottomRight()) x = cursorGlobalPoint.x() y = cursorGlobalPoint.y() if(tl.x() + PADDING >= x and tl.x() <= x and tl.y() + PADDING >= y and tl.y() <= y): #左上角 self.dir = self.Numbers.LEFTTOP self.setCursor(QCursor(Qt.SizeFDiagCursor)) #设置鼠标形状 elif(x >= rb.x() - PADDING and x <= rb.x() and y >= rb.y() - PADDING and y <= rb.y()): #右下角 self.dir = self.Numbers.RIGHTBOTTOM self.setCursor(QCursor(Qt.SizeFDiagCursor)) elif(x <= tl.x() + PADDING and x >= tl.x() and y >= rb.y() - PADDING and y <= rb.y()): #左下角 self.dir = self.Numbers.LEFTBOTTOM self.setCursor(QCursor(Qt.SizeBDiagCursor)) elif(x <= rb.x() and x >= rb.x() - PADDING and y >= tl.y() and y <= tl.y() + PADDING): #右上角 self.dir = self.Numbers.RIGHTTOP self.setCursor(QCursor(Qt.SizeBDiagCursor)) elif(x <= tl.x() + PADDING and x >= tl.x()): #左边 self.dir = self.Numbers.LEFT self.setCursor(QCursor(Qt.SizeHorCursor)) elif( x <= rb.x() and x >= rb.x() - PADDING): #右边 self.dir = self.Numbers.RIGHT self.setCursor(QCursor(Qt.SizeHorCursor)) elif(y >= tl.y() and y <= tl.y() + PADDING): #上边 self.dir = self.Numbers.UP self.setCursor(QCursor(Qt.SizeVerCursor)) elif(y <= rb.y() and y >= rb.y() - PADDING): #下边 self.dir = self.Numbers.DOWN self.setCursor(QCursor(Qt.SizeVerCursor)) else: #默认 self.dir = self.Numbers.NONE self.setCursor(QCursor(Qt.ArrowCursor)) def mouseReleaseEvent(self,event): if(event.button() == Qt.LeftButton): self.isLeftPressDown = False if(self.dir != self.Numbers.NONE): self.releaseMouse() self.setCursor(QCursor(Qt.ArrowCursor)) def mousePressEvent(self,event): if(event.button()==Qt.LeftButton): self.isLeftPressDown=True if(self.dir != self.Numbers.NONE): self.mouseGrabber() else: self.dragPosition = event.globalPos() - self.frameGeometry().topLeft() def mouseMoveEvent(self,event): gloPoint = event.globalPos() rect = self.rect() tl = self.mapToGlobal(rect.topLeft()) rb = self.mapToGlobal(rect.bottomRight()) if(not self.isLeftPressDown): self.region(gloPoint) else: if(self.dir != self.Numbers.NONE): rmove=QRect(tl, rb) if(self.dir==self.Numbers.LEFT): if(rb.x() - gloPoint.x() <= self.minimumWidth()): rmove.setX(tl.x()) else: rmove.setX(gloPoint.x()) elif(self.dir==self.Numbers.RIGHT): print u"youbian" rmove.setWidth(gloPoint.x() - tl.x()) elif(self.dir==self.Numbers.UP): if(rb.y() - gloPoint.y() <= self.minimumHeight()): rmove.setY(tl.y()) else: rmove.setY(gloPoint.y()) elif(self.dir==self.Numbers.DOWN): rmove.setHeight(gloPoint.y() - tl.y()) elif(self.dir==self.Numbers.LEFTTOP): if(rb.x() - gloPoint.x() <= self.minimumWidth()): rmove.setX(tl.x()) else: rmove.setX(gloPoint.x()) if(rb.y() - gloPoint.y() <= self.minimumHeight()): rmove.setY(tl.y()) else: rmove.setY(gloPoint.y()) elif(self.dir==self.Numbers.RIGHTTOP): rmove.setWidth(gloPoint.x() - tl.x()) rmove.setY(gloPoint.y()) elif(self.dir==self.Numbers.LEFTBOTTOM): rmove.setX(gloPoint.x()) rmove.setHeight(gloPoint.y() - tl.y()) elif(self.dir==self.Numbers.RIGHTBOTTOM): rmove.setWidth(gloPoint.x() - tl.x()) rmove.setHeight(gloPoint.y() - tl.y()) else: pass self.setGeometry(rmove) else: self.move(event.globalPos() - self.dragPosition) event.accept() if __name__ == '__main__': app = QApplication(sys.argv) shadow = ShadowWidget() shadow.show() sys.exit(app.exec_()) |
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持服务器之家。
原文链接：https://blog.csdn.net/jylonger/article/details/49665049
