PyQt5可视化窗口【计算器】
import sys
from PyQt5.QtWidgets import QApplication, QTextEdit, QWidget, QPushButton, QVBoxLayout, QHBoxLayout, QGroupBox, QRadioButton, QLineEdit,QGridLayout
from PyQt5.QtCore import QPoint
class MyWindow(QWidget):
方法init_text窗口函数（addWidge：添加一个小部件窗口）
创建一个文本框，setFixedSize设置文本框大小
def init_text(self):
text = QLineEdit()
text.setFixedSize(800,30)
self.text = text
return text
init_grid（addLayout：在布局控制器里添加一个小的布局控制器）
data 字典 ： 按照行数计算器按键的显示
循环字典里按键一整行的字符，然后循环列表
btn, 按钮 line_number 行数 , col_number 列数
btn.clicked.connect(self.buttonClicked) 链接可点击
def init_grid(self):
data ={
0: ["7", "8", "9", "+", "-"],
1: ["4", "5", "6", "*", "/"],
2: ["1", "2", "3", "(", ")"],
3: ["0", ".", "=", "del", "C"]
}
grid = QGridLayout()
for line_number, line_data in data.items():
for col_number, number in enumerate(line_data):
btn = QPushButton(number)
grid.addWidget(btn, line_number, col_number)
btn.clicked.connect(self.buttonClicked)
return grid
buttonClicked 运算函数 ，目前支持单次运算结果加减乘除**（结果出来后无法继续再加减乘除运行）**
def buttonClicked(self):
#sender = self.sender();
# 确定信号发送者
# self.display.setText(sender.text())
sender = self.sender().text()
if sender not in "Cdel":
self.input_list += sender
if sender == "C":
self.input_list = ""
# self.text.setText(self.input_list)
#设置文本为空
self.text.clear()
#清空文本
if sender == "del":
self.input_list = self.input_list[:-1]
if sender == "=":
idx = 0
#初始索引位置
result = 0
#初始结果数字
number = None
#上一个运算符
# self.input_list = [99+8-7=]
for i, info in enumerate(self.input_list):
if info in "+-*/":
if number == None:
result = int(self.input_list[idx:i])
idx = i+1
#运算符后一位的索引位置
number = info
#保存运算符下次判断
else:
if number == "+":
result += int(self.input_list[idx:i])
idx = i+1
number = info
elif number == "-":
result -= int(self.input_list[idx:i])
idx = i+1
number = info
elif number == "*":
result *= int(self.input_list[idx:i])
idx = i+1
number = info
elif number == "/":
result -= int(self.input_list[idx:i])
idx = i+1
number = info
if info == "=":
if number == "+":
result += int(self.input_list[idx:i])
elif number == "-":
result -= int(self.input_list[idx:i])
elif number == "*":
result *= int(self.input_list[idx:i])
elif number == "/":
result /= int(self.input_list[idx:i])
#[8*(9+6-9)]
str_result = str(result)
self.text.setText(str_result)
self.input_list = ""
else:
self.text.setText(self.input_list)
#文本显示内容
app = QApplication(sys.argv)
w = MyWindow()
w.show()
app.exec()
初始化定义文本，QVBoxLayout 垂直布局控制器函数，调用方法init_text窗口函数（addWidge：添加一个小部件窗口）、init_grid（addLayout：在布局控制器里添加一个小的布局控制器）
def __init__(self):
super().__init__()
self.text = None
self.input_list = ""
layout = QVBoxLayout()
layout.addWidget(self.init_text())
layout.addLayout(self.init_grid())
self.setLayout(layout)
self.setLayout(layout) 设置布局方式（主窗口）在这里插入代码片
import sys
from PyQt5.QtWidgets import QApplication, QTextEdit, QWidget, QPushButton, QVBoxLayout, QHBoxLayout, QGroupBox, QRadioButton, QLineEdit,QGridLayout
from PyQt5.QtCore import QPoint
class MyWindow(QWidget):
def init(self):
super().init()
self.text = None
self.input_list = ""
self.str_result = None
layout = QVBoxLayout()
layout.addWidget(self.init_text())
layout.addLayout(self.init_grid())
self.setLayout(layout)
def init_text(self):
text = QLineEdit()
text.setFixedSize(800,30)
self.text = text
return text
def init_grid(self):
data ={
0: ["7", "8", "9", "+", "-"],
1: ["4", "5", "6", "*", "/"],
2: ["1", "2", "3", "(", ")"],
3: ["0", ".", "=", "del", "C"]
}
grid = QGridLayout()
for line_number, line_data in data.items():
for col_number, number in enumerate(line_data):
btn = QPushButton(number)
grid.addWidget(btn, line_number, col_number)
btn.clicked.connect(self.buttonClicked)
return grid
def buttonClicked(self):
#sender = self.sender(); # 确定信号发送者
#self.display.setText(sender.text())
sender = self.sender().text()
if sender in "+-*/" and len(self.input_list)== 0:
self.input_list = self.str_result
print("error")
if sender not in "Cdel":
self.input_list += sender
if sender == "C":
self.input_list = ""
# self.text.setText(self.input_list) #设置文本为空
self.text.clear() #清空文本
if sender == "del":
self.input_list = self.input_list[:-1]
if sender == "=":
idx = 0 #初始索引位置
result = 0 #初始结果数字
number = None #上一个运算符
# self.input_list = [99+8-7=]
for i, info in enumerate(self.input_list):
if info in "+-*/":
if number == None:
result = int(self.input_list[idx:i])
idx = i+1 #运算符后一位的索引位置
number = info #保存运算符下次判断
else:
if number == "+":
result += int(self.input_list[idx:i])
idx = i+1
number = info
elif number == "-":
result -= int(self.input_list[idx:i])
idx = i+1
number = info
elif number == "*":
result *= int(self.input_list[idx:i])
idx = i+1
number = info
elif number == "/":
result -= int(self.input_list[idx:i])
idx = i+1
number = info
if info == "=":
if number == "+":
result += int(self.input_list[idx:i])
elif number == "-":
result -= int(self.input_list[idx:i])
elif number == "*":
result *= int(self.input_list[idx:i])
elif number == "/":
result /= int(self.input_list[idx:i])
#[8*(9+6-9)]
self.str_result = str(result)
self.text.setText(self.str_result)
self.input_list = ""
else:
self.text.setText(self.input_list) #文本显示内容
app = QApplication(sys.argv)
w = MyWindow()
w.show()
app.exec()