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标题: python-张荣亮-2021.01.27 [打印本页]

作者: 淰7331 时间: 2021-1-27 20:14
标题: python-张荣亮-2021.01.27

'''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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