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'''表格布局''' from PyQt5.QtWidgets import QApplication,QWidget,QPushButton,QGridLayout,QLabel,QLineEdit,QTextEdit from PyQt5.QtCore import Qt,QCoreApplication import sys class Example(QWidget): def __init__(self): super().__init__() self.initUI() def initUI(self): # 创建一个表格布局 grid = QGridLayout() self.setLayout(grid) # 创建计算机的显示器 self.screen = QLineEdit() # 设置显示器为只读模式 self.screen.setReadOnly(True) # 设置右对齐 self.screen.setAlignment(Qt.AlignRight) grid.addWidget(self.screen,0,1,1,4) # self.setGeometry(300,300,300,250) # self.setWindowTitle('文本编辑器') # self.show() # 创建所有按钮的标签 labels = ['<——','CE','C','Close', '7','8','9','/', '4','5','6','*', '1','2','3','-', '0','.','=','+', # 创建按钮的位置参数 positions = [(x,y) for x in range(1,6) for y in range(1,5)] # print(positions) # 创建按钮并添加到表格中 for label,position in zip(labels,positions): btn = QPushButton(label) btn.clicked.connect(self.funcition) # grid.addWidget(btn,position[0],position[1]) grid.addWidget(btn,*position) # backspace = QPushButton('<——') # grid.addWidget(backspace,1,1) self.move(500,500) self.setWindowTitle('计算器') self.show() def funcition(self): # 获取按键的内容 text = self.sender().text() # 判断被按下的按钮，然后执行相应的操作 if text == '<——': self.backspace() elif text == 'C' or text == 'CE': self.clear() elif text == 'Close': self.close() elif text == '=': self.calculate() else: self.write(text) def backspace(self): '''退格''' # 获取文本框的内容 content = self.screen.text() # 向文本框写入内容 self.screen.setText(content[:-1]) def clear(self): '''清除显示器内容''' self.screen.setText('') def close(self): '''关闭计算器''' QCoreApplication.quit() def calculate(self): '''计算结果''' content = self.screen.text() result = eval(content) self.screen.setText(str(result)) def write(self,text): '''向显示器写入内容''' content = self.screen.text() if len(content) == 0: content = text elif content[-1] in '+-*/' and text in '+-*/': content = content[:-1]+text else: content = content+text self.screen.setText(content) if __name__ == "__main__": app = QApplication(sys.argv) ex = Example() sys.exit(app.exec_())
from PyQt5.QtWidgets import QApplication,QWidget,QLabel,QLineEdit,QTextEdit,QGridLayout import sys class Example(QWidget): def __init__(self): super().__init__() self.initUI() def initUI(self): grid = QGridLayout() self.setLayout(grid) title = QLabel('标题:') title_edit = QLineEdit() author = QLabel('作者:') author_edit = QLineEdit() content = QLabel('正文:') content_edit = QTextEdit() grid.addWidget(title,1,1) grid.addWidget(title_edit,1,2) grid.addWidget(author,2,1) grid.addWidget(author_edit,2,2) grid.addWidget(content,3,1) grid.addWidget(content_edit,3,2) self.setGeometry(300,300,300,250) self.setWindowTitle('文本编辑器') self.show() if __name__ == "__main__": app = QApplication(sys.argv) ex = Example() sys.exit(app.exec_())
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