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标题: python-贺威栋-2021.01.07 [打印本页]
作者: I5029 时间: 2021-1-27 20:21
标题: python-贺威栋-2021.01.07
'''表格布局'''
from PyQt5.QtWidgets import QApplication,QWidget,QPushButton,QGridLayout,QLabel,QLineEdi
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)
# 创建计算器的显示器
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)
# 创建所有按钮的标签
labels = ['(*^▽^*)','CE','C','Close',
'7','8','9','/',
'4','5','6','*',
'1','2','3','-',
# 创建按钮的位置参数
positions = [(x,y) for x in range(1,6) for y in range(1,5)]
# 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.function)
grid.addWidget(btn,*position)
self.move(500,500)
self.setWindowTitle('计算器')
self.show()
def function(self):
# 获取对按键的内容
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'''
# 获取文本框内容
content = self.screen.text()
# 向文本框写入内容
self.screen.setText(content[:-1])
def calculate(self):
'''计算结果'''
content = self.screen.text()
result = eval(content)
self.screen.setText(str(result))
def clear(self):
'''清除'''
self.screen.setText('')
def close(self):
'''关闭计算器'''
QCoreApplication.quit()
def write(self,text):
'''向显示器输入内容'''
content = self.screen.text()
if len(content) == 0:
content = text
elif text in '+-*/' and content[-1] 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:')
author = QLabel('作者:')
content = QLabel('正文:')
title_edit = QLineEdit()
author_edit = QLineEdit()
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(300,300,300,300)
self.setWindowTitle('文本编辑器')
self.show()
if __name__ == '__main__':
app = QApplication(sys.argv)
ex = Example()
sys.exit(app.exec_())
from PyQt5.QtWidgets import QApplication,QMainWindow
import sys,time
class Example(QMainWindow):
def __init__(self):
super().__init__()
self.initUI()
def initUI(self):
# 创建状态栏
status = self.statusBar()
# 在状态栏显示信息
status.showMessage("准备好了!")
# time.sleep(2)
# status.showMessage("可以开始了!")
self.setGeometry(300,300,300,300)
self.setWindowTitle("状态栏")
self.show()
if __name__ == "__main__":
app = QApplication(sys.argv)
ex = Example()
sys.exit(app.exec_())
from PyQt5.QtWidgets import QApplication,QMainWindow,qApp,QAction
from PyQt5.QtGui import QIcon
import sys
class Example(QMainWindow):
def __init__(self):
super().__init__()
self.initUI()
def initUI(self):
# 创建一个菜单条目
exitAction = QAction(QIcon('python\day09\exit3.png'),'退出',self)
# 添加快捷键
exitAction.setShortcut('ctrl+q')
# 添加一个提示
exitAction.setStatusTip('退出程序')
# 给菜单条目添加动作
exitAction.triggered.connect(qApp.quit)
# 创建一个菜单栏
menuBar = self.menuBar()
# 添加一个File菜单
fileMenu = menuBar.addMenu('File')
# 添加菜单条目
fileMenu.addAction(exitAction)
self.setGeometry(300,300,300,300)
self.setWindowTitle('程序菜单')
self.show()
if __name__ == '__main__':
app = QApplication(sys.argv)
ex = Example()
sys.exit(app.exec_())
from PyQt5.QtWidgets import QApplication,QMainWindow,qApp,QAction
from PyQt5.QtGui import QIcon
import sys
class Example(QMainWindow):
def __init__(self):
super().__init__()
self.initUI()
def initUI(self):
exitAction = QAction(QIcon('python\day09\exit3.png'),'退出',self)
exitAction.setShortcut('ctrl+q')
exitAction.triggered.connect(qApp.quit)
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