python + pyqt 实现的你下载css背景图片的小工具

eqwq

学习python有三个星期了，算是做的第一个小工具

虽是小工具，大版本有3个



1.命令行版

2.pyqt GUI版

3.pyqt GUI 线程版

期间也大大小小的bug修复n多次，几次重构（笑），算得上是“软件开发的小周期”吧。今天贴代码是是第3版：

saveCssImg.py


# coding: utf-8 -*-

from PyQt4 import QtCore, QtGui
from saveCssImg import *

try:
    _fromUtf8 = QtCore.QString.fromUtf8
except AttributeError:
    def _fromUtf8(s):
        return s

try:
    _encoding = QtGui.QApplication.UnicodeUTF8
    def _translate(context, text, disambig):
        return QtGui.QApplication.translate(context, text, disambig, _encoding)
except AttributeError:
    def _translate(context, text, disambig):
        return QtGui.QApplication.translate(context, text, disambig)

class UI_getImg(QtGui.QDialog):   
    def __init__(self, parent=None):
        super(UI_getImg, self).__init__(parent)  
        self.setupUi(self)
        self.lineEdit.setText('http://qt-project.org/static/styles/style-min0512201215101354716658.css')  
        self.pushButton.clicked.connect(self.goWork)
   
    def goWork(self):
        self.thread = WorkerThread()
        self.thread.sinOut.connect(self.outText)
        self.thread.finished.connect(self.workFinished)

        cssUrl = str(self.lineEdit.text())
        savePath = 'downImgs'

        self.textBrowser.setText(u'准备下载图片从 %s' %  cssUrl )
        self.pushButton.setDisabled(True)


        self.thread.setEvr(cssUrl,savePath)

    def workFinished(self):
        self.outText(u'已退出下载！')
        self.pushButton.setDisabled(False)


    def setupUi(self, Dialog):
        Dialog.setObjectName(_fromUtf8("Dialog"))
        Dialog.resize(560, 407)
        self.pushButton = QtGui.QPushButton(Dialog)
        self.pushButton.setGeometry(QtCore.QRect(460, 20, 75, 23))
        self.pushButton.setObjectName(_fromUtf8("pushButton"))
        self.textBrowser = QtGui.QTextBrowser(Dialog)
        self.textBrowser.setGeometry(QtCore.QRect(10, 60, 541, 341))
        self.textBrowser.setObjectName(_fromUtf8("textBrowser"))
        self.lineEdit = QtGui.QLineEdit(Dialog)
        self.lineEdit.setGeometry(QtCore.QRect(10, 20, 431, 20))
        self.lineEdit.setObjectName(_fromUtf8("lineEdit"))        

        self.retranslateUi(Dialog)
        QtCore.QMetaObject.connectSlotsByName(Dialog)

    def retranslateUi(self, Dialog):
        Dialog.setWindowTitle(_translate("Dialog", "download css img", None))
        self.pushButton.setText(_translate("Dialog", "download", None))  

    def outText(self,text):
        self.textBrowser.append(text)  


class WorkerThread(QtCore.QThread):
    sinOut = QtCore.pyqtSignal(str)
     
    def __init__(self,parent=None):
        super(WorkerThread,self).__init__(parent)

    def setEvr(self,cssUrl,savePath):
        self.cssUrl = cssUrl
        self.savePath = savePath
        self.start()

    def getMsg(self,msg):
        self.sinOut.emit(msg)

    def run(self):
        self.saveimg = saveCssBackImg(self.cssUrl,self.savePath)
        self.saveimg.updateSig.connect(self.getMsg)
        self.saveimg.saveImg()

if __name__ == "__main__":
   
    app = QtGui.QApplication([])
    ui = UI_getImg()
    ui.setWindowFlags(QtCore.Qt.MSWindowsFixedSizeDialogHint)
    ui.show()
    app.exec_()



project_ui.py


# coding: utf-8 -*-

from PyQt4 import QtCore, QtGui
from saveCssImg import *

try:
    _fromUtf8 = QtCore.QString.fromUtf8
except AttributeError:
    def _fromUtf8(s):
        return s

try:
    _encoding = QtGui.QApplication.UnicodeUTF8
    def _translate(context, text, disambig):
        return QtGui.QApplication.translate(context, text, disambig, _encoding)
except AttributeError:
    def _translate(context, text, disambig):
        return QtGui.QApplication.translate(context, text, disambig)

class UI_getImg(QtGui.QDialog):   
    def __init__(self, parent=None):
        super(UI_getImg, self).__init__(parent)  
        self.setupUi(self)
        self.lineEdit.setText('http://qt-project.org/static/styles/style-min0512201215101354716658.css')  
        self.pushButton.clicked.connect(self.goWork)
   
    def goWork(self):
        self.thread = WorkerThread()
        self.thread.sinOut.connect(self.outText)
        self.thread.finished.connect(self.workFinished)

        cssUrl = str(self.lineEdit.text())
        savePath = 'downImgs'

        self.textBrowser.setText(u'准备下载图片从 %s' %  cssUrl )
        self.pushButton.setDisabled(True)


        self.thread.setEvr(cssUrl,savePath)

    def workFinished(self):
        self.outText(u'已退出下载！')
        self.pushButton.setDisabled(False)


    def setupUi(self, Dialog):
        Dialog.setObjectName(_fromUtf8("Dialog"))
        Dialog.resize(560, 407)
        self.pushButton = QtGui.QPushButton(Dialog)
        self.pushButton.setGeometry(QtCore.QRect(460, 20, 75, 23))
        self.pushButton.setObjectName(_fromUtf8("pushButton"))
        self.textBrowser = QtGui.QTextBrowser(Dialog)
        self.textBrowser.setGeometry(QtCore.QRect(10, 60, 541, 341))
        self.textBrowser.setObjectName(_fromUtf8("textBrowser"))
        self.lineEdit = QtGui.QLineEdit(Dialog)
        self.lineEdit.setGeometry(QtCore.QRect(10, 20, 431, 20))
        self.lineEdit.setObjectName(_fromUtf8("lineEdit"))        

        self.retranslateUi(Dialog)
        QtCore.QMetaObject.connectSlotsByName(Dialog)

    def retranslateUi(self, Dialog):
        Dialog.setWindowTitle(_translate("Dialog", "download css img", None))
        self.pushButton.setText(_translate("Dialog", "download", None))  

    def outText(self,text):
        self.textBrowser.append(text)  


class WorkerThread(QtCore.QThread):
    sinOut = QtCore.pyqtSignal(str)
     
    def __init__(self,parent=None):
        super(WorkerThread,self).__init__(parent)

    def setEvr(self,cssUrl,savePath):
        self.cssUrl = cssUrl
        self.savePath = savePath
        self.start()

    def getMsg(self,msg):
        self.sinOut.emit(msg)

    def run(self):
        self.saveimg = saveCssBackImg(self.cssUrl,self.savePath)
        self.saveimg.updateSig.connect(self.getMsg)
        self.saveimg.saveImg()

if __name__ == "__main__":
   
    app = QtGui.QApplication([])
    ui = UI_getImg()
    ui.setWindowFlags(QtCore.Qt.MSWindowsFixedSizeDialogHint)
    ui.show()
    app.exec_()





差两处修复：

1.urllib.urlretrieve下载图片，对http status 404和403等也会保存成图片
2.QtGui.QTextBrower 横向滚动