pyqt编程

 1 # -*- coding: utf-8 -*-
 2 from PyQt4.QtGui import *
 3 from PyQt4.QtCore import *
 4 import sys
 5 
 6 QTextCodec.setCodecForTr(QTextCodec.codecForName("utf8"))
 7  
 8 class Progess(QDialog):
 9     def __init__(self,parent=None):
10         super(Progess,self).__init__(parent)
11         self.setWindowTitle(self.tr("使用进度条"))
12         numLabel=QLabel(self.tr("文件数目"))
13         self.numLineEdit=QLineEdit("10")
14         typeLabel=QLabel(self.tr("显示类型"))
15         self.typeComboBox=QComboBox()
16         self.typeComboBox.addItem(self.tr("进度条"))
17         self.typeComboBox.addItem(self.tr("进度对话框"))
18 
19         self.progressBar=QProgressBar()
20 
21         startPushButton=QPushButton(self.tr("开始"))
22 
23         layout=QGridLayout()
24         layout.addWidget(numLabel,0,0)
25         layout.addWidget(self.numLineEdit,0,1)
26         layout.addWidget(typeLabel,1,0)
27         layout.addWidget(self.typeComboBox,1,1)
28         layout.addWidget(self.progressBar,2,0,1,2)
29         layout.addWidget(startPushButton,3,1)
30         layout.setMargin(15)
31         layout.setSpacing(10)
32 
33         self.setLayout(layout)
34         
35         self.connect(startPushButton,SIGNAL("clicked()"),self.slotStart)
36 
37     def slotStart(self):
38         num=int(self.numLineEdit.text())
39 
40         if self.typeComboBox.currentIndex()==0:
41             self.progressBar.setMinimum(0)
42             self.progressBar.setMaximum(num)
43 
44             for i in range(num):
45                 self.progressBar.setValue(i)
46                 QThread.msleep(100)
47 
48         elif self.typeComboBox.currentIndex()==1:
49             progressDialog=QProgressDialog(self)
50             progressDialog.setWindowModality(Qt.WindowModal)
51             progressDialog.setMinimumDuration(5)
52             progressDialog.setWindowTitle(self.tr("请等待"))
53             progressDialog.setLabelText(self.tr("拷贝..."))
54             progressDialog.setCancelButtonText(self.tr("取消"))
55             progressDialog.setRange(0,num)
56 
57             for i in range(num):
58                 progressDialog.setValue(i)
59                 QThread.msleep(100)
60                 if progressDialog.wasCanceled():
61                     return
62                 
63 app=QApplication(sys.argv)
64 progess=Progess()
65 progess.show()
66 app.exec_()