下载进度条显示，进度条显示,#!/usr/bin/p

下载进度条显示，进度条显示,#!/usr/bin/p

#!/usr/bin/python# -*- coding: utf-8 -*-from threading import Threadimport sys, time, randomfrom PyQt4 import QtGuifrom PyQt4 import QtCoreDEFAULT_STYLE = """QProgressBar{    border: 2px solid grey;    border-radius: 5px;    text-align: center}QProgressBar::chunk {    background-color: lightblue;    width: 10px;    margin: 1px;}"""COMPLETED_STYLE = """QProgressBar{    border: 2px solid grey;    border-radius: 5px;    text-align: center}QProgressBar::chunk {    background-color: #CD96CD;    width: 10px;    margin: 1px;}"""class XProgressBar(QtGui.QProgressBar):    def __init__(self, parent = None):        QtGui.QProgressBar.__init__(self, parent)        self.setStyleSheet(DEFAULT_STYLE)        self.step = 0    def setValue(self, value):        QtGui.QProgressBar.setValue(self, value)        if value == self.maximum():            self.setStyleSheet(COMPLETED_STYLE)class DownloadThread(Thread):    def __init__(self, job):        Thread.__init__(self)        self.job = job    def run(self):        global JOBS        while self.job.BAR.step < 100 and self.job.stauts=='run':            self.job.BAR.step += 1            time.sleep(random.randint(0, 1))        else:            self.job.stauts=='done'class O(dict):    def __getattr__(self, name):        try:            return self[name]        except KeyError:            raise AttributeError(name)# ID, RUL, Path, BAR, OPTJOBS = [    O({'ID':1, "URL":'http://1', "Path":"C:/", "BAR":None, "OPT":None, "_dt":None, "stauts":"stop", "threads":4, "dinfo":None}),    O({'ID':2, "URL":'http://2', "Path":"C:/", "BAR":None, "OPT":None, "_dt":None, "stauts":"stop", "threads":4, "dinfo":None}),    O({'ID':3, "URL":'http://3', "Path":"C:/", "BAR":None, "OPT":None, "_dt":None, "stauts":"stop", "threads":4, "dinfo":None}),    O({'ID':4, "URL":'http://4', "Path":"C:/", "BAR":None, "OPT":None, "_dt":None, "stauts":"stop", "threads":4, "dinfo":None}),]class dInfo(QtCore.QThread):    _bar = QtCore.pyqtSignal(object)    def __init__(self, ui, job):        QtCore.QThread.__init__(self)        self.running = True        self.job = job        self._bar.connect(ui.update_bar_info)        self.start()    def run(self):        global JOBS        while self.running and self.job.BAR is not None and self.job.stauts=='run':            self._bar.emit(self.job.BAR)            self.sleep(random.randint(0, 1))        else:            self.terminate()class Example(QtGui.QWidget):    def __init__(self):        super(Example, self).__init__()        self.threads = []        self.initUI()    def initUI(self):        global JOBS        lab = ['URL','Progress','Time Remaining','Cur Speed','Avg Speed','Path','Size', 'ProgressBar', 'Opt']        self.dltable = QtGui.QTableWidget(len(JOBS), len(lab))        self.dltable.setHorizontalHeaderLabels(lab)        for i, d in enumerate(JOBS):            self.dltable.setItem(i, 0, QtGui.QTableWidgetItem(d.URL))            self.dltable.setItem(i, 1, QtGui.QTableWidgetItem(''))            self.dltable.setItem(i, 2, QtGui.QTableWidgetItem(''))            self.dltable.setItem(i, 3, QtGui.QTableWidgetItem(''))            self.dltable.setItem(i, 4, QtGui.QTableWidgetItem(''))            self.dltable.setItem(i, 5, QtGui.QTableWidgetItem(d.Path))            self.dltable.setItem(i, 6, QtGui.QTableWidgetItem(''))            bar = XProgressBar(self)            d.BAR = bar            self.dltable.setCellWidget(i, 7, bar)            opt = QtGui.QPushButton('Opt', self)            self.connect(opt, QtCore.SIGNAL('clicked()'), self.doAction)            d.OPT = opt            self.dltable.setCellWidget(i, 8, opt)        self.button = QtGui.QPushButton('Start', self)        self.button.setFocusPolicy(QtCore.Qt.NoFocus)        self.connect(self.button, QtCore.SIGNAL('clicked()'), self.doAllAction)        layout = QtGui.QGridLayout()        layout.addWidget(self.dltable, 0, 0)        layout.addWidget(self.button, 1, 0)        self.setLayout(layout)        self.setWindowTitle('ProgressBar')        self.setGeometry(300, 300, 950, 450)    def update_bar_info(self, bar):        if bar.step <= 100:            bar.setValue(bar.step)    def doAction(self):        global JOBS        _but = self.sender()        for d in JOBS:            if _but == d.OPT:                self.create(d)    def create(self, d, all=False):        if d.stauts=='stop':            _download = DownloadThread(d)            d._dt = _download            d.stauts = 'run'            _download.start()            d.OPT.setText('Stop')            _dInfo = dInfo(self, d)            self.threads.append(_dInfo)            d.dinfo = _dInfo        elif d.stauts == 'run':            d.stauts = 'stop'            # d.dinfo.stop()            d.OPT.setText('Start')    def initDownload(self):        global JOBS        for d in JOBS:            if d._dt is None:                self.create(d)    def doAllAction(self):        self.initDownload()    def closeEvent(self, event):        reply = QtGui.QMessageBox.question(self, u"关闭系统", u"确定关闭系统吗?",                            QtGui.QMessageBox.Yes|QtGui.QMessageBox.No)        if reply == QtGui.QMessageBox.Yes:            self.dInfo.running = False            event.accept()        elif reply == QtGui.QMessageBox.No:            event.ignore()if __name__ == '__main__':    app = QtGui.QApplication(sys.argv)    ex = Example()    ex.show()    app.exec_()#该片段来自于http://byrx.net