QCheckBox：复选框
#!/usr/bin/python # -*- coding: utf-8 -*- import sys from PyQt4 import QtGui from PyQt4 import QtCore class CheckBoxExample(QtGui.QWidget): def __init__(self): super(CheckBoxExample, self).__init__() self.initUI() def initUI(self): self.setGeometry(300, 300, 250, 150) self.setWindowTitle('Checkbox') self.cb = QtGui.QCheckBox('Show title', self) # 初始化复选框 self.cb.setFocusPolicy(QtCore.Qt.NoFocus) self.cb.move(10, 10) self.cb.toggle() # 切换复选框状态 self.connect(self.cb, QtCore.SIGNAL('stateChanged(int)'), self.changeTitle) def changeTitle(self, value): if self.cb.isChecked(): self.setWindowTitle('Checkbox') else: self.setWindowTitle('') if __name__ == '__main__': app = QtGui.QApplication(sys.argv) ex = CheckBoxExample() ex.show() app.exec_()
切换按钮
#!/usr/bin/python # -*- coding: utf-8 -*- import sys from PyQt4 import QtGui from PyQt4 import QtCore class ToggleButtonExample(QtGui.QWidget): def __init__(self): super(ToggleButtonExample, self).__init__() self.initUI() def initUI(self): self.color = QtGui.QColor(0, 0, 0) # 黑色 self.red = QtGui.QPushButton('Red', self) self.red.setCheckable(True) self.red.move(10, 10) self.connect(self.red, QtCore.SIGNAL('clicked()'), self.setColor) self.green = QtGui.QPushButton('Green', self) self.green.setCheckable(True) # setCheckable(true)为属性,表示可以选中 self.green.move(10, 60) self.connect(self.green, QtCore.SIGNAL('clicked()'), self.setColor) self.blue = QtGui.QPushButton('Blue', self) self.blue.setCheckable(True) self.blue.move(10, 110) self.connect(self.blue, QtCore.SIGNAL('clicked()'), self.setColor) self.square = QtGui.QWidget(self) self.square.setGeometry(150, 20, 100, 100) self.square.setStyleSheet("QWidget { background-color: %s }" % self.color.name()) self.setWindowTitle('ToggleButton') self.setGeometry(300, 300, 280, 170) def setColor(self): source = self.sender() if source.text() == "Red": if self.red.isChecked(): # 判断是否被选中 self.color.setRed(255) else: self.color.setRed(0) elif source.text() == "Green": if self.green.isChecked(): self.color.setGreen(255) else: self.color.setGreen(0) else: if self.blue.isChecked(): self.color.setBlue(255) else: self.color.setBlue(0) self.square.setStyleSheet("QWidget { background-color: %s }" % self.color.name()) if __name__ == '__main__': app = QtGui.QApplication(sys.argv) ex = ToggleButtonExample() ex.show() app.exec_()
蓝色的表示被选中。
QSlider：滑块
#!/usr/bin/python # -*- coding: utf-8 -*- import sys from PyQt4 import QtGui from PyQt4 import QtCore class SliderExample(QtGui.QWidget): def __init__(self): super(SliderExample, self).__init__() self.initUI() def initUI(self): slider = QtGui.QSlider(QtCore.Qt.Horizontal, self) slider.setFocusPolicy(QtCore.Qt.NoFocus) slider.setGeometry(30, 40, 100, 30) self.connect(slider, QtCore.SIGNAL('valueChanged(int)'), self.changeValue) self.label = QtGui.QLabel(self) self.label.setPixmap(QtGui.QPixmap('images/mute.png')) self.label.setGeometry(160, 40, 300, 200) self.setWindowTitle('Slider') self.setGeometry(300, 300, 250, 150) def changeValue(self, value): if value == 0: self.label.setPixmap(QtGui.QPixmap('images/mute.png')) elif value > 0 and value <= 30: self.label.setPixmap(QtGui.QPixmap('images/min.png')) elif value > 30 and value < 80: self.label.setPixmap(QtGui.QPixmap('images/med.png')) else: self.label.setPixmap(QtGui.QPixmap('images/max.png')) if __name__ == '__main__': app = QtGui.QApplication(sys.argv) ex = SliderExample() ex.show() app.exec_()
图片随着滑块的滚动改变。
QProgressbar：滚动条
#!/usr/bin/python # -*- coding: utf-8 -*- import sys from PyQt4 import QtGui from PyQt4 import QtCore class ProgressBarExample(QtGui.QWidget): def __init__(self): super(ProgressBarExample, self).__init__() self.initUI() def initUI(self): self.pbar = QtGui.QProgressBar(self) self.pbar.setGeometry(30, 40, 200, 25) self.button = QtGui.QPushButton('Start', self) self.button.setFocusPolicy(QtCore.Qt.NoFocus) self.button.move(40, 80) self.connect(self.button, QtCore.SIGNAL('clicked()'), self.doAction) self.timer = QtCore.QBasicTimer() self.step = 0 self.setWindowTitle('ProgressBar') self.setGeometry(300, 300, 250, 150) def timerEvent(self, event): if self.step >= 100: self.timer.stop() self.button.setText('Restart') return self.step = self.step + 1 self.pbar.setValue(self.step) def doAction(self): if self.timer.isActive(): # timer.started的状态 self.timer.stop() self.button.setText('Continue') else: if self.step >= 100: self.step = 0 # 清零 self.timer.start(100, self) # start之后触发timerEvent self.button.setText('Stop') if __name__ == '__main__': app = QtGui.QApplication(sys.argv) ex = ProgressBarExample() ex.show() app.exec_()
通过调用 start() 方法加载定时器事件，该方法有两个参数，超时时间（ timeout ）和接受事件的对象（ object ）。
QLineEdit：单行编辑文本的组件，有撤销复制粘贴等基本功能
#!/usr/bin/python # -*- coding: utf-8 -*- from PyQt4 import QtGui from PyQt4 import QtCore class QLineEditExample(QtGui.QWidget): def __init__(self, parent=None): QtGui.QWidget.__init__(self, parent) self.initUI() def initUI(self): self.label = QtGui.QLabel(self) edit = QtGui.QLineEdit(self) edit.move(60, 100) self.label.move(60, 40) self.connect(edit, QtCore.SIGNAL('textChanged(QString)'), self.onChanged) self.setWindowTitle('QLineEdit') self.setGeometry(250, 200, 350, 250) def onChanged(self, text): self.label.setText(text) # 让label的text和编辑处的text同步 self.label.adjustSize() # 让label自适应text的大小 def main(): app = QtGui.QApplication([]) exm = QLineEditExample() exm.show() app.exec_() if __name__ == '__main__': main()
QSplitter：分离器
#!/usr/bin/python # -*- coding: utf-8 -*- from PyQt4 import QtGui, QtCore class SplitterExample(QtGui.QWidget): def __init__(self): super(SplitterExample, self).__init__() self.initUI() def initUI(self): hbox = QtGui.QHBoxLayout(self) topleft = QtGui.QFrame(self) topleft.setFrameShape(QtGui.QFrame.StyledPanel) # 为了看见边框设置有样式的框体 topright = QtGui.QFrame(self) topright.setFrameShape(QtGui.QFrame.StyledPanel) bottom = QtGui.QFrame(self) bottom.setFrameShape(QtGui.QFrame.StyledPanel) splitter1 = QtGui.QSplitter(QtCore.Qt.Horizontal) splitter1.addWidget(topleft) splitter1.addWidget(topright) splitter2 = QtGui.QSplitter(QtCore.Qt.Vertical) splitter2.addWidget(splitter1) splitter2.addWidget(bottom) hbox.addWidget(splitter2) self.setLayout(hbox) self.setWindowTitle('QSplitter') QtGui.QApplication.setStyle(QtGui.QStyleFactory.create('Cleanlooks')) # 设置分离器样式，某些样式是不可见的 self.setGeometry(250, 200, 350, 250) def main(): app = QtGui.QApplication([]) ex = SplitterExample() ex.show() app.exec_() if __name__ == '__main__': main()
可拖动的效果。
QComboBox：下拉列表清单
#!/usr/bin/python # -*- coding: utf-8 -*- from PyQt4 import QtGui, QtCore class ComboBoxExample(QtGui.QWidget): def __init__(self): super(ComboBoxExample, self).__init__() self.initUI() def initUI(self): self.label = QtGui.QLabel("Ubuntu", self) combo = QtGui.QComboBox(self) # 初始化，添加元素 combo.addItem("Ubuntu") combo.addItem("Mandriva") combo.addItem("Fedora") combo.addItem("Red Hat") combo.addItem("Gentoo") combo.move(50, 50) self.label.move(50, 150) self.connect(combo, QtCore.SIGNAL('activated(QString)'), self.onActivated) # 选项被选择时调用OnActivated self.setGeometry(250, 200, 350, 250) self.setWindowTitle('QComboBox') def onActivated(self, text): self.label.setText(text) self.label.adjustSize() def main(): app = QtGui.QApplication([]) ex = ComboBoxExample() ex.show() app.exec_() if __name__ == '__main__': main()
