PyQt 5控件
PyQt 5控件包括：按钮、复选框、滑动条、列表框等
复选框QCheckBox
QCheckBox复选框控件，它有两个状态：打开和关闭，他是一个带有文本标签（Label）的控件。复选框常用于表示程序中可以启用或者禁用的功能。
cb = QCheckBox('show title',self)
# 创建一个复选框，标题命名为show title
cb.toggle()
# 切换复选框状态，复选框默认没有勾选，并且没有标题
1 # Author:凌逆战 2 # -*- coding:utf-8 -*- 3 import sys 4 from PyQt5.QtWidgets import QWidget, QCheckBox, QApplication 5 from PyQt5.QtCore import Qt 6 7 class Example(QWidget): 8 def __init__(self): 9 super().__init__() 10 self.initUI() 11 12 def initUI(self): 13 cb = QCheckBox('Show title', self) # 复选框自带的文本lable 14 cb.move(20, 20) 15 cb.toggle() # 切换状态# 勾选复选框 16 # 复选框stateChanged状态改变信号绑定self.changeTitle槽 17 cb.stateChanged.connect(self.changeTitle) 18 19 self.setGeometry(300, 300, 250, 150) 20 self.setWindowTitle('QCheckBox') 21 self.show() 22 23 def changeTitle(self, state): 24 if state == Qt.Checked: 25 self.setWindowTitle('QCheckBox') 26 else: 27 self.setWindowTitle('') 28 29 if __name__ == '__main__': 30 app = QApplication(sys.argv) 31 ex = Example() 32 sys.exit(app.exec_())
开关按钮Toggle button
ToggleButton是QPushButton的一种特殊模式
1 # Author:凌逆战 2 # -*- coding:utf-8 -*- 3 import sys 4 from PyQt5.QtWidgets import (QWidget, QPushButton,QFrame, QApplication) 5 from PyQt5.QtGui import QColor 6 7 class Example(QWidget): 8 def __init__(self): 9 super().__init__() 10 self.initUI() 11 12 def initUI(self): 13 self.col = QColor(0, 0, 0) # 初始黑颜色的值 14 15 redb = QPushButton('Red', self) # 创建一个红色按钮 16 redb.setCheckable(True) # 按钮设置成可检查的 17 redb.move(10, 10) 18 # 红色按钮点击信号和self.setColor槽连接在一起 19 redb.clicked[bool].connect(self.setColor) 20 21 greenb = QPushButton('Green', self) # 创建一个绿色按钮greenb 22 greenb.setCheckable(True) # 按钮设置成可以检查的 23 greenb.move(10, 60) 24 greenb.clicked[bool].connect(self.setColor) 25 26 blueb = QPushButton('Blue', self) 27 blueb.setCheckable(True) # 通过setCheckable()方法得到一个ToggleButton 28 blueb.move(10, 110) 29 blueb.clicked[bool].connect(self.setColor) 30 31 self.square = QFrame(self) 32 self.square.setGeometry(150, 20, 100, 100) 33 self.square.setStyleSheet("QWidget { background-color: %s }" % 34 self.col.name()) 35 36 self.setGeometry(300, 300, 280, 170) 37 self.setWindowTitle('Toggle button') 38 self.show() 39 40 def setColor(self, pressed): 41 42 source = self.sender() # 发送信号的人 43 44 if pressed: 45 val = 255 46 else: 47 val = 0 48 49 if source.text() == "Red": 50 self.col.setRed(val) 51 elif source.text() == "Green": 52 self.col.setGreen(val) 53 else: 54 self.col.setBlue(val) 55 56 self.square.setStyleSheet("QFrame { background-color: %s }" % 57 self.col.name()) 58 59 if __name__ == '__main__': 60 app = QApplication(sys.argv) 61 ex = Example() 62 sys.exit(app.exec_())
滑动条QSlider
sld = QSlider(QT.Horizontal,self)
# 创建一个水平滑块
1 # Author:凌逆战 2 # -*- coding:utf-8 -*- 3 import sys 4 from PyQt5.QtWidgets import (QWidget, QSlider,QLabel, QApplication) 5 from PyQt5.QtCore import Qt 6 from PyQt5.QtGui import QPixmap 7 8 class Example(QWidget): 9 def __init__(self): 10 super().__init__() 11 self.initUI() 12 13 def initUI(self): 14 sld = QSlider(Qt.Horizontal, self) # 水平的滑动条 15 sld.setFocusPolicy(Qt.NoFocus) # 设置焦点策略 16 sld.setGeometry(30, 40, 100, 30) 17 sld.valueChanged[int].connect(self.changeValue) # int传参 18 19 self.label = QLabel(self) # 创建一个QLable控件，并设置一个初始音量图标 20 self.label.setPixmap(QPixmap('audio.ico')) 21 self.label.setGeometry(160, 40, 80, 30) 22 23 self.setGeometry(300, 300, 280, 170) 24 self.setWindowTitle('QSlider') 25 self.show() 26 27 def changeValue(self, value): # value形参 28 29 if value == 0: 30 self.label.setPixmap(QPixmap('audio.ico')) # 设置像素映射 31 elif value > 0 and value <= 30: 32 self.label.setPixmap(QPixmap('min.ico')) 33 elif value > 30 and value < 80: 34 self.label.setPixmap(QPixmap('med.ico')) 35 else: 36 self.label.setPixmap(QPixmap('max.ico')) 37 38 if __name__ == '__main__': 39 app = QApplication(sys.argv) 40 ex = Example() 41 sys.exit(app.exec_())
进度条QProgressBar
self.pbar = QProgressBar(self)
# 创建进度条实例
1 # Author:凌逆战 2 # -*- coding:utf-8 -*- 3 import sys 4 from PyQt5.QtWidgets import (QWidget, QProgressBar,QPushButton, QApplication) 5 from PyQt5.QtCore import QBasicTimer 6 7 class Example(QWidget): 8 def __init__(self): 9 super().__init__() 10 self.initUI() 11 12 def initUI(self): 13 self.pbar = QProgressBar(self) # 创建一个进度条QProgressBar实例 14 self.pbar.setGeometry(30, 40, 200, 25) 15 16 self.btn = QPushButton('Start', self) # 创建一个Start按钮实例 17 self.btn.move(40, 80) 18 self.btn.clicked.connect(self.doAction) 19 20 self.timer = QBasicTimer() # 创建一个定时器实例，用来激活QProgressBar 21 self.step = 0 22 23 self.setGeometry(300, 300, 280, 170) 24 self.setWindowTitle('进度条') 25 self.show() 26 # 每一个QObject及其子类都有一个timeEvent()事件处理器， 27 # 重写timeEvrnt，实现这个事件处理器来响应定时器事件 28 def timerEvent(self, e): 29 30 if self.step >= 100: 31 self.timer.stop() 32 self.btn.setText('完成') 33 return 34 35 self.step = self.step + 1 36 self.pbar.setValue(self.step) # 把step的值设置为进度条的值 37 38 def doAction(self): 39 40 if self.timer.isActive(): 41 self.timer.stop() 42 self.btn.setText('Start') 43 else: 44 # 调用start()方法来启动一个计时器 45 # 第一个参数：超时；第二个参数:对象将接受的事件 46 self.timer.start(100, self) 47 self.btn.setText('Stop') 48 49 if __name__ == '__main__': 50 app = QApplication(sys.argv) 51 ex = Example() 52 sys.exit(app.exec_())
日历控件QCalendarWidget
cal = QCalendarWidget(self)
# 创建日历控件
cal.clicked[QDate].connect(self.showDate)
# 点击[QDate]发出信号，将信号clicked和self.showDate槽绑定
1 # Author:凌逆战 2 # -*- coding:utf-8 -*- 3 import sys 4 from PyQt5.QtWidgets import (QWidget, QCalendarWidget,QLabel, QApplication) 5 from PyQt5.QtCore import QDate 6 7 class Example(QWidget): 8 def __init__(self): 9 super().__init__() 10 self.initUI() 11 12 def initUI(self): 13 cal = QCalendarWidget(self) # 创建一个日历控件QCalendarWidget 14 cal.setGridVisible(True) # 设置网格可视化 15 cal.move(20, 20) 16 cal.clicked[QDate].connect(self.showDate) 17 18 self.lbl = QLabel(self) 19 date = cal.selectedDate() 20 self.lbl.setText(date.toString()) # 将data转换成字符串 21 self.lbl.move(130, 260) 22 23 self.setGeometry(300, 300, 350, 300) 24 self.setWindowTitle('Calendar') 25 self.show() 26 27 def showDate(self, date): 28 self.lbl.setText(date.toString()) 29 30 if __name__ == '__main__': 31 app = QApplication(sys.argv) 32 ex = Example() 33 sys.exit(app.exec_())
