莊庭寬Python視窗GUI自訂方法canvas.delete('all')
#原來240單元程式碼如下
from tkinter import * #從函式庫 tkinter 輸入所有 * 方法
from math import * #從函式庫 math 輸入所有 * 方法
t = (3,4,5,6,7,8,9,10,11,12,16,20)#宣告一元組tuple(...)
tk = Tk()
tk.title("視窗使用者介面GUI")
canvas = Canvas(tk, width=800, height=500)
canvas.pack()
def show(event): #定義由事件event(按鈕選單)呼叫的函數show
cx, cy, cr = 160, 210, 150 #宣告圓中心座標cx, cy半徑cr
x, y =[],[] #宣告二陣列[...]
k = s.get() #取得 ge t按鈕選單的選擇變數
u = 2 * pi / k #使用模組 math 圓周率 pi
for i in range(k):
x.append(cx + cr*cos(i*u)) #加入陣列的元素
y.append(cy + cr*sin(i*u)) #使用模組 math 三角函數cos, sin
for i in range(k-1):
canvas.create_line(x[i], y[i], x[i+1], y[i+1], width=3, fill='purple')
canvas.create_line(x[k-1], y[k-1], x[0], y[0], width=3, fill='purple') #可考慮增加width寬度,fill顏色
def diagonal():
cx, cy, cr = 510, 210, 200 #宣告圓中心座標cx, cy半徑cr
x, y =[],[] #宣告二陣列[...]
k = s.get() #取得 ge t按鈕選單的選擇變數
u = 2 * pi / k #模組 math 圓周率 pi
for i in range(k):
x.append(cx + cr*cos(i*u)) #加入陣列的元素
y.append(cy + cr*sin(i*u))
for i in range(k):
for j in range(i+2, k):
canvas.create_line(x[i], y[i], x[j], y[j], fill="green", width=4)
def IamMonkey():
canvas.delete('all')
s = IntVar(tk)
label = Label(tk, text="莊庭寬視窗設計", bg='black', fg='white').pack(side=LEFT)
combo = OptionMenu(tk, s, *t, command = show).pack(side=LEFT) #下拉式選單menu
button = Button(tk, text="對角線", command = diagonal).pack(side=LEFT)#按鈕
button1 = Button(tk, text="刪除", command = IamMonkey).pack(side=LEFT)
labe2 = Label(tk, text="劉任昌成功了", bg='red', fg='white').pack(side=LEFT)
tk.mainloop()
說明影片
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將最後幾列修改如下
s = IntVar(tk)
label = Label(tk, text="莊庭寬視窗設計", bg='black', fg='white', font=("Arial", 36)).pack(side=LEFT)
combo = OptionMenu(tk, s, *t, command = show).pack(side=LEFT) #下拉式選單menu
button = Button(tk, text="對角線", command = diagonal, font=("Arial", 36)).pack(side=LEFT)#按鈕
button1 = Button(tk, text="刪除", command = IamMonkey, font=("Arial", 36)).pack(side=LEFT)
labe2 = Label(tk, text="莊庭寬成功了", bg='red', fg='white', font=("Arial", 36)).pack(side=LEFT)
tk.mainloop()
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