pyqt4制作透明无边框窗体

用PyQt做了一个无边框登陆窗口，效果如下：

下面是代码：

# -*- coding: utf-8 -*-

from PyQt4 import QtGui ,Qt ,QtCore

image=QtGui.QImage()

bgImage=image.load("images/logins.png")

class labelBtn(QtGui.QLabel):

"""

自定义图片按钮类

"""

def __init__(self,ID):

super(labelBtn, self).__init__()

self.setMouseTracking(True)

self.ID=ID

def mouseReleaseEvent(self,event):  #注:

#鼠标点击事件

self.parent().btnHandle(self.ID)

def enterEvent(self,event):

#鼠标进入时间

self.parent().btnEnter(self.ID)

def leaveEvent(self,event):

#鼠标离开事件

self.parent().btnLeave(self.ID)

class login(QtGui.QMainWindow):

def __init__(self,parent=None):

super(login, self).__init__(parent)

self.setWindowTitle(u"学生体能健康测试软件")

self.setFixedSize(347,264)

self.setWindowIcon(QtGui.QIcon("images/umbrella.png"))

#窗口居中显示

desktop =QtGui.QApplication.desktop()

width = desktop.width()

height = desktop.height()

self.move((width - self.width())/2, (height - self.height())/2)

self.setMouseTracking(True)

#无边框

self.setWindowFlags(Qt.Qt.FramelessWindowHint)

#显示托盘信息

self.trayIcon = QtGui.QSystemTrayIcon(self)

self.trayIcon.setIcon(QtGui.QIcon("images/umbrella.png"))

self.trayIcon.show()

self.trayIcon.activated.connect(self.trayClick)       #点击托盘

self.trayMenu()                                       #右键菜单

label_user = QtGui.QLabel(u"账号",self)

label_user.setGeometry(QtCore.QRect(125, 135, 50, 22))

label_passwd = QtGui.QLabel(u"密码",self)

label_passwd.setGeometry(QtCore.QRect(125, 170, 50, 22))

self.label = QtGui.QLabel(self)

self.label.setGeometry(QtCore.QRect(19, 129, 80, 80))

self.label.setPixmap(QtGui.QPixmap("images/teacher.png"))

self.lineEdit_user = QtGui.QLineEdit(u"root",self)

self.lineEdit_user.setGeometry(QtCore.QRect(160, 135, 150, 22))

self.lineEdit_passwd = QtGui.QLineEdit(u'1234',self)

self.lineEdit_passwd.setGeometry(QtCore.QRect(160, 170, 150, 22))

self.lineEdit_passwd.setEchoMode(QtGui.QLineEdit.Password)

self.lineEdit_passwd.setValidator(QtGui.QRegExpValidator(Qt.QRegExp("[A-Za-z0-9]+"),self))

#这里也可以设置QLineEdit背景为透明

self.pushButton_login = QtGui.QPushButton(QtGui.QIcon("images/login.png"),u"登录",self)

self.pushButton_login.setGeometry(QtCore.QRect(250, 235, 75, 22))

self.pushButton_change = QtGui.QPushButton(QtGui.QIcon("images/onetwo.png"),u"身份切换",self)

self.pushButton_change.setGeometry(QtCore.QRect(10, 235, 75, 22))

self.pushButton_change.setFlat(True)

self.pushButton_change.setContextMenuPolicy(Qt.Qt.CustomContextMenu)

self.btn_min=labelBtn(1)               #定义最小化按钮 ID:1

self.btn_min.setParent(self)

self.btn_min.setGeometry(281,0,27,23)

self.btn_min.setToolTip(u"最小化")

self.btn_close=labelBtn(2)              #定义关闭按钮 ID:2

self.btn_close.setParent(self)

self.btn_close.setGeometry(310,0,38,21)

self.btn_close.setToolTip(u"关闭")

self.connect(self.pushButton_change, QtCore.SIGNAL("clicked()"),self.contextMenu)

self.connect(self.pushButton_login, QtCore.SIGNAL("clicked()"),self.log_in)

def contextMenu(self):             self.userOption = QtGui.QAction(QtGui.QIcon("images/user.png"),u"学生", self)             self.rootOption = QtGui.QAction(QtGui.QIcon("images/root.png"),u"老师", self)                         self.userOption.triggered.connect(self.user)             self.rootOption.triggered.connect(self.root)                         menu = QtGui.QMenu(self)             menu.addAction(self.rootOption)             menu.addAction(self.userOption)             menu.exec_(QtGui.QCursor.pos())

def root(self):

self.pushButton_change.setText(u"老师")

self.label.setPixmap(QtGui.QPixmap("images/teacher.png"))

def user(self):

self.pushButton_change.setText(u"学生")

self.label.setPixmap(QtGui.QPixmap("images/students.png"))

def log_in(self):

dlg=QtGui.QMessageBox(self)

dlg.information(self, u"提示",u"应该跳向另一个窗口，这里没有写！",QtGui.QMessageBox.Ok)

def btnHandle(self,ID):

#最小化

if ID==1:

self.hide()

self.showMinimized()

elif ID==2:

#关闭

self.trayIcon.hide()

self.close()

def btnEnter(self,ID):

#鼠标进入

if ID == 1:

self.btn_min.setPixmap(QtGui.QPixmap("images/min.png"))

elif ID == 2:

self.btn_close.setPixmap(QtGui.QPixmap("images/close.png"))

def btnLeave(self,ID):

#鼠标离开

'''false.png这张图片是不存在的，目的是要在鼠标

离开后还原背景，因为默认按钮我已经PS在背景上了'''

self.btn_min.setPixmap(QtGui.QPixmap("images/false.png"))

self.btn_close.setPixmap(QtGui.QPixmap("images/false.png"))

def trayClick(self,reason):

#双击托盘

if reason==QtGui.QSystemTrayIcon.DoubleClick:

self.showNormal()

else:

pass

def trayMenu(self):

#右击托盘弹出的菜单

img_main = QtGui.QIcon("images/main.png")

img_exit = QtGui.QIcon("images/exit.png")

self.trayIcon.setToolTip(u"学生体能健康测试软件")

self.restoreAction = QtGui.QAction(img_main,u"打开主窗口", self)

self.restoreAction.triggered.connect(self.showNormal)

self.quitAction = QtGui.QAction(img_exit,u"退出", self)

self.quitAction.triggered.connect(QtGui.qApp.quit)

self.trayIconMenu = QtGui.QMenu(self)

self.trayIconMenu.addAction(self.restoreAction)

self.trayIconMenu.addSeparator()

self.trayIconMenu.addAction(self.quitAction)

self.trayIcon.setContextMenu(self.trayIconMenu)

def resizeEvent(self,event):

#重绘窗体背景

pal=QtGui.QPalette()

pal.setBrush(QtGui.QPalette.Window,QtGui.QBrush(image.scaled(event.size(),

Qt.Qt.KeepAspectRatioByExpanding,Qt.Qt.SmoothTransformation)))

self.setPalette(pal)

"""下面这两个才是重点，是动得关键"""

def mousePressEvent(self,event):

#鼠标点击事件

if event.button() == QtCore.Qt.LeftButton:

self.dragPosition = event.globalPos() - self.frameGeometry().topLeft()

event.accept()

def mouseMoveEvent(self,event):

#鼠标移动事件

if event.buttons() ==QtCore.Qt.LeftButton:

self.move(event.globalPos() - self.dragPosition)

event.accept()

if __name__ == "__main__":

import sys

app = QtGui.QApplication(sys.argv)

frm = login()

frm.show()

sys.exit(app.exec_())

注

:目前的问题是QLabel相应的是点击事件，不是单击事件，这个问题还没用解决！

转载：http://blog.chinaunix.net/uid-25979788-id-3081886.html