python如何做一个界面可以当尺子
时间: 2023-06-23 11:10:10 浏览: 66
可以使用Python的GUI库Tkinter来实现一个简单的尺子界面。具体步骤如下:
1. 导入Tkinter库及其他需要的库
```python
import tkinter as tk
from tkinter import ttk
```
2. 创建主窗口并设置窗口标题
```python
root = tk.Tk()
root.title("尺子")
```
3. 创建画布,并添加水平和垂直线条
```python
canvas = tk.Canvas(root, width=400, height=400)
canvas.pack()
# 添加水平线条
for i in range(0, 400, 10):
canvas.create_line(i, 0, i, 5)
# 添加垂直线条
for i in range(0, 400, 10):
canvas.create_line(0, i, 5, i)
```
4. 创建标尺和显示尺寸的标签
```python
# 创建标尺标签
ruler_label = ttk.Label(root, text="")
ruler_label.pack()
# 创建显示尺寸的标签
size_label = ttk.Label(root, text="")
size_label.pack()
```
5. 定义鼠标移动事件处理函数,计算出鼠标位置相对于画布左上角的坐标,并根据坐标计算出尺寸并更新标签显示
```python
def motion(event):
x, y = event.x, event.y
x = int(x / 10) * 10
y = int(y / 10) * 10
size_label.config(text="尺寸:{} x {}".format(x, y))
ruler_label.place(x=x, y=y)
```
6. 绑定鼠标移动事件到画布上,并启动主循环
```python
canvas.bind("<Motion>", motion)
root.mainloop()
```
完整代码如下:
```python
import tkinter as tk
from tkinter import ttk
root = tk.Tk()
root.title("尺子")
canvas = tk.Canvas(root, width=400, height=400)
canvas.pack()
# 添加水平线条
for i in range(0, 400, 10):
canvas.create_line(i, 0, i, 5)
# 添加垂直线条
for i in range(0, 400, 10):
canvas.create_line(0, i, 5, i)
# 创建标尺标签
ruler_label = ttk.Label(root, text="")
ruler_label.pack()
# 创建显示尺寸的标签
size_label = ttk.Label(root, text="")
size_label.pack()
def motion(event):
x, y = event.x, event.y
x = int(x / 10) * 10
y = int(y / 10) * 10
size_label.config(text="尺寸:{} x {}".format(x, y))
ruler_label.place(x=x, y=y)
canvas.bind("<Motion>", motion)
root.mainloop()
```