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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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