PyQt4内容整理一
Prentice.Hall.Rapid.GUI.Programming.with.Python.and.Qt.the.definitive.guide.to.PyQt.programming.2008.pdf 里面的例子实现。
第四章全部例子：window测试通过
图片和代码的顺序不是一致的，不过应该很容易看出来，然后有些例子做了一些改动，比如下面第一张图。
1 import sys 2 import time 3 from PyQt4.QtCore import * 4 from PyQt4.QtGui import * 5 6 app=QApplication(sys.argv) 7 try: 8 9 due=QTime.currentTime() 10 message='Alter' 11 if len(sys.argv) <2: 12 raise ValueError 13 hours,mins = sys.argv[1].split(":") 14 due=QTime(int(hours),int(mins)) 15 if len(sys.argv) >=2: 16 message = ''.join(sys.argv[2:]) 17 except ValueError: 18 message = 'Usage: alter.pyw HH:MM' 19 while QTime.currentTime() <= due: 20 time.sleep(20) 21 label = QLabel('<font color=red size=72 ><b>message</b></font>') 22 label.setWindowFlags(Qt.SplashScreen) 23 label.show() 24 QTimer.singleShot(6000,app.quit) 25 app.exec_() 26 27 ------------------------------------------------------------------------- 28 29 # -*- coding: utf-8 -*- 30 from __future__ import division #引入真实除和数学的相关包 31 import sys 32 from math import * 33 from PyQt4.QtCore import * 34 from PyQt4.QtGui import * 35 36 class Form(QDialog): 37 def __init__(self,parent=None): 38 super(Form,self).__init__(parent) 39 self.setWindowTitle("TextBrowser") 40 self.textbrowser = QTextBrowser()#QTextBrowser()只读的多行的文本框 41 self.lineedit = QLineEdit("input your expression and press enter") 42 self.lineedit.selectAll()#选中全部，注意里面没有参数，下面的setFocus()也没有参数 43 self.lineedit.setFocus() 44 layout = QVBoxLayout() 45 layout.addWidget(self.textbrowser) 46 layout.addWidget(self.lineedit)#要加self 47 self.setLayout(layout) 48 self.connect(self.lineedit,SIGNAL('returnPressed()'),self.lineeidt_change)#只写方法名，不要写括号 49 #主要是要记得写self，总是忘记，这里有一个新的内置的signal：returnPressed() 50 def lineeidt_change(self): 51 try: 52 text = unicode(self.lineedit.text()) 53 #self.lineedit.text()获得文本内容 54 self.textbrowser.append("%s = %s" % (text,eval(text)))#使用append方法进行追加 55 except: 56 self.textbrowser.append("<font color=red size =20>%s Error </font>" % str(text)) #格式化符号写在外面,<font>要写在引号里面 57 app = QApplication(sys.argv) 58 form = Form() 59 form.show() 60 app.exec_() #这个是app的结束，不是sys. 61 62 -------------------------------------------------------------------------------- 63 import sys 64 from PyQt4.QtCore import * 65 from PyQt4.QtGui import * 66 from datetime import date 67 68 class Form(QDialog): 69 def __init__(self,parent=None): 70 super(Form,self).__init__(parent) 71 self.mdict = {'a':10 ,'b':20, 'c':30} 72 self.setWindowTitle("windows") 73 self.label_date = QLabel(date.taday().strfTime("%Y-%m-%d")) 74 self.comboBox1 = QComboBox() 75 self.comboBox1.addItems(sorted(self.mdict.keys())) 76 self.comboBox2 = QComboBox() 77 self.comboBox2.addItems(sorted(self.mdict.keys())) 78 self.doubleSpinBox = QDoubleSpinBox() 79 self.doubleSpinBox.setRange(0.1,100000) 80 self.doubleSpinBox.setValue(1.0) 81 self.label = QLabel("1.0") 82 83 slef.connect(self.comboBox1,SIGNAL('currentIndexChanged(int)'),self.uichange) 84 slef.connect(self.comboBox2,SIGNAL('currentIndexChanged(int)'),self.uichange) 85 slef.connect(self.doubleSpinBox,SIGNAL('ValueChanged(double)'),self.uichange) 86 87 layout =QGirdLayout() 88 layout.addWidget(self.lable_date,0,0) 89 layout.addWidget(self.comboBox1,1,0) 90 layout.addWidget(self.comboBox2,1,1) 91 layout.addWidget(self.doubleSpinBox,2,0) 92 layout.addWidget(self.label,2,1) 93 94 self.setLayout(layout) 95 def uichange(self): 96 text_b1 = unicode(self.comboBox1.currentText()) 97 text_b2 = unicode(self.comboBox2.currentText()) 98 try: 99 self.label.setText(self.mdict[text_b1] * self.mdict(text_b2) * self.doubleSpinBox.value()) 100 except: 101 102 self.label.setText("<font color=red size = 20><b> ERROR</b></font>") 103 app = QApplication(sys.argv) 104 form = Form() 105 form.show() 106 app.exec_() 107 108 109 110 ---------------------------------------------------------------------- 111 # -*- coding: utf-8 -*- 112 import sys 113 from PyQt4.QtCore import * 114 from PyQt4.QtGui import * 115 from datetime import datetime 116 117 class Form(QDialog): 118 def __init__(self,parent=None): 119 super(Form,self).__init__(parent) 120 self.mdict = {'a':10 ,'b':20, 'c':30} 121 self.setWindowTitle("windows") 122 self.label_date = QLabel(datetime.now().strftime("%Y-%m-%d"))#使用了strftime()方法进行了格式化，从datetime.datetime.now()得到现在的时间 123 self.comboBox1 = QComboBox() # QComboBox 下拉框，采用addItems()的方法增加下拉项，可以方便的使用字典的形式。currentText()方法得到现在的下拉项。 124 self.comboBox1.addItems(sorted(self.mdict.keys()))#sorted()复制字典的键 125 self.comboBox2 = QComboBox() 126 self.comboBox2.addItems(sorted(self.mdict.keys())) 127 self.doubleSpinBox = QDoubleSpinBox() # 128 self.doubleSpinBox.setRange(0.1,100000) # 0.1-100000范围，然后步长是1 129 self.doubleSpinBox.setValue(1.0) # 设置值 130 self.label = QLabel("1.0") 131 self.resize(350,200) 132 133 self.connect(self.comboBox1,SIGNAL('currentIndexChanged(int)'),self.uichange) #特有的方法： currentIndexChanged(int) and valueChanged(double) 这有一些规律，比如首字母小写，驼峰记法，后面一般都是被动式加括号，里面有相应参数 134 self.connect(self.comboBox2,SIGNAL('currentIndexChanged(int)'),self.uichange) 135 self.connect(self.doubleSpinBox,SIGNAL('valueChanged(double)'),self.uichange) 136 137 layout = QGridLayout() 138 layout.addWidget(self.label_date,0,0) # 添加组件的时候，要记得是绑定调用，即要用self实现对组件的调用，在gui中几乎所有的都要使用self显性的调用。 139 layout.addWidget(self.comboBox1,1,0) 140 layout.addWidget(self.comboBox2,1,1) 141 layout.addWidget(self.doubleSpinBox,2,0) 142 layout.addWidget(self.label,2,1) 143 144 self.setLayout(layout) 145 def uichange(self): 146 text_b1 = unicode(self.comboBox1.currentText()) 147 text_b2 = unicode(self.comboBox2.currentText()) 148 try: 149 a= self.mdict[text_b1] 150 b= self.mdict[text_b2] 151 print '-----------' 152 c= self.doubleSpinBox.value() #得到doubleSpinBpx的值 153 154 amount = a*b*c 155 print amount 156 self.label.setText('%s'% amount) 157 except: 158 self.label.setText("<font color=red size = 20><b> ERROR</b></font>") 159 app = QApplication(sys.argv) 160 form = Form() 161 form.show() 162 app.exec_() 163 164 165 166 -------------------------------------------------------------------------- 167 import sys 168 from PyQt4.QtGui import * 169 from PyQt4.QtCore import * 170 171 class Form2(QDialog): 172 def __init__(self,parent=None): 173 super(Form2,self).__init__(parent) 174 self.setWindowTitle("Test 2") 175 self.dial = QDial() 176 self.dial.setNotchesVisible(True) 177 self.spinbox = QSpinBox() 178 179 layout = QHBoxLayout() 180 layout.addWidget(self.dial) 181 layout.addWidget(self.spinbox) 182 183 self.setLayout(layout) 184 185 self.connect(self.dial,SIGNAL('valueChanged(int)'),self.spinbox.setValue) 186 self.connect(self.spinbox,SIGNAL('valuechanged(int)'),self.dial.setValue) 187 188 app = QApplication(sys.argv) 189 form = Form2() 190 form.show() 191 app.exec_() 192 193 ----------------------------------------------------------------------------- 194 import sys 195 from PyQt4.QtGui import * 196 from PyQt4.QtCore import * 197 198 class Form3(QSpinBox): 199 def __init__(self): 200 self.times=0 201 super(Form3,self).__init__() 202 self.connect(self,SIGNAL('valueChanged(int)'),self.checkZero) 203 self.connect(self,SIGNAL('zeroTimes'),self.func) 204 self.resize(150,50) 205 def checkZero(self): 206 if self.value()==0: 207 self.times+=1 208 self.emit(SIGNAL('zeroTimes'),self.times) 209 210 def func(self,times): 211 print '%s times' % times 212 213 app = QApplication(sys.argv) 214 form = Form3() 215 form.show() 216 app.exec_() 217 218 -------------------------------------------------------------------------------- 219 import sys 220 from PyQt4.QtGui import * 221 from PyQt4.QtCore import * 222 223 class Form4(QDialog): 224 def __init__(self): 225 super(Form4,self).__init__() 226 names=['one','two','three','four','five','six'] 227 self.button1 = QPushButton(names[0]) 228 self.button2 = QPushButton(names[1]) 229 self.button3 = QPushButton(names[2]) 230 self.button4 = QPushButton(names[3]) 231 self.button5 = QPushButton(names[4]) 232 self.button6 = QPushButton(names[5]) 233 234 layout = QHBoxLayout() 235 layout.addWidget(self.button1) 236 layout.addWidget(self.button2) 237 layout.addWidget(self.button3) 238 layout.addWidget(self.button4) 239 layout.addWidget(self.button5) 240 layout.addWidget(self.button6) 241 self.setLayout(layout) 242 243 self.connect(self.button1,SIGNAL('clicked()'),lambda x=names[0] : self.myFunc(x)) 244 self.connect(self.button2,SIGNAL('clicked()'),lambda x=names[1] : self.myFunc(x)) 245 self.connect(self.button3,SIGNAL('clicked()'),lambda x=names[2] : self.myFunc(x)) 246 self.connect(self.button4,SIGNAL('clicked()'),self.myClicked) 247 self.connect(self.button5,SIGNAL('clicked()'),self.myClicked) 248 self.connect(self.button6,SIGNAL('clicked()'),self.myClicked) 249 def myClicked(self): 250 button = self.sender() 251 #if button is None or not isinstance(button,QPushButton): 252 if button is None or not hasattr(button,'text'): 253 return 254 print 'the button clicked is button %s' % button.text() 255 256 257 def myFunc(self,name): 258 print 'the button clicked is button %s' % name 259 260 261 262 263 264 app = QApplication(sys.argv) 265 form = Form4() 266 form.show() 267 app.exec_() 268 269 -----------------------------------------------------------------------------------
