PySide2 Qt.LeftButton

PySide2,maya2017, Qt.LeftButton

#!/usr/bin/python3# -*- coding: utf-8 -*-import sysfrom PySide2.QtWidgets import (QApplication, QWidget,QPushButton,    QLineEdit,QHBoxLayout, QVBoxLayout,QColorDialog,QInputDialog,QFileDialog)from PySide2.QtCore import Qtfrom PySide2.QtGui import QCursor,QColorclass Example(QWidget):    def __init__(self):        super(Example, self).__init__()        self.style = """                 QPushButton{background-color:grey;color:white;}                 #window{ background:pink; }                #test{ background-color:black;color:white; }            """        self.setStyleSheet(self.style)        self.setWindowFlags(Qt.FramelessWindowHint)        self.initUI()    def initUI(self):        self.setGeometry(300, 300, 300, 220)          self.setWindowTitle('test')         self.setObjectName("window")        btn1 = QPushButton(u"关闭",self)        btn1.clicked.connect(self.close)        btn1.setObjectName('test')        btn2 = QPushButton(u"最小化",self)        btn2.clicked.connect(self.showMinimized)        btn3 = QPushButton(u"最大化",self)        btn3.clicked.connect(self.showMaximized)        btn11 = QPushButton(u"改变背景",self)        btn11.clicked.connect(self.showColor)        btn22 = QPushButton(u"选择文件",self)        btn22.clicked.connect(self.showFile)        btn33 = QPushButton(u"对话框",self)        btn33.clicked.connect(self.showDialog)        self.linet1 = QLineEdit("111111",self)        self.linet2 = QLineEdit("ssssssss",self)        hbox1 = QHBoxLayout()   #水平布局        hbox1.addWidget(btn1)        hbox1.addWidget(btn2)        hbox1.addWidget(btn3)        hbox2 = QHBoxLayout()   #水平布局        hbox2.addWidget(btn11)        hbox2.addWidget(btn22)        hbox2.addWidget(btn33)        vbox = QVBoxLayout()   #垂直布局        vbox.addLayout(hbox1)        vbox.addLayout(hbox2)        vbox.addWidget(self.linet1)        vbox.addWidget(self.linet2)        self.setLayout(vbox)        self.show()    #重写三个方法使我们的Example窗口支持拖动,上面参数window就是拖动对象    def mousePressEvent(self, event):        if event.button()==Qt.LeftButton:            self.m_drag=True            self.m_DragPosition=event.globalPos()-self.pos()            event.accept()            self.setCursor(QCursor(Qt.OpenHandCursor))    def mouseMoveEvent(self, QMouseEvent):        if Qt.LeftButton and self.m_drag:            print 1            self.move(QMouseEvent.globalPos()-self.m_DragPosition)            QMouseEvent.accept()    def mouseReleaseEvent(self, QMouseEvent):        self.m_drag=False        self.setCursor(QCursor(Qt.ArrowCursor))    def showColor(self):        col = QColorDialog.getColor()        if col.isValid():            self.setStyleSheet(self.style+"#window{background:%s}" % col.name())    def showDialog(self):        text, ok = QInputDialog.getText(self, u'对话框',             u'请输入你的名字:')        if ok:            self.linet1.setText(str(text))    def showFile(self):        fname = QFileDialog.getOpenFileName(self, 'Open file', '/home')        if fname[0]:            f = open(fname[0], 'r')            with f:                data = f.readline()                self.linet1.setText(data) # if __name__ == '__main__':    # app = QApplication(sys.argv)ex = Example()ex.show()    # sys.exit(app.exec_())