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=4
sys.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_())
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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