# 功能鈕 Button
###### tags: `活用tkinter – 學習運用GUI`

## 基本的按鈕功能
* 使用點擊的方式，讓文字顯示出來

from tkinter import *

def msgShow():
    label["text"] = "我愛蟒蛇"
    label["bg"] = "lightyellow"
    label["fg"] = "red"

root = Tk()
root.title("python-tkinter")
root.geometry("300x400")
label = Label(root)
btn = Button(root, text = "顯示訊息", command = msgShow)
# command的用法就是下一步的動作
label.pack()
btn.pack()

root.mainloop()

* 結果

* 如果要隱藏的話....

btn2 = Button(root, text = "隱藏訊息", command = root.destroy)
btn2.pack()

* 這樣就可以連同視窗一起關掉了

## 使用lambda的時機
* 範例

from tkinter import *

def bColor(bgColor):
    root.config(bg = bgColor)

root = Tk()
root.title("python-tkinter")
root.geometry("300x400")
#label = Label(root)

exbtn = Button(root, text = "exit", command = root.destroy)
bluebtn = Button(root, text = "Blue", command = lambda : bColor("blue"))
greenbtn = Button(root, text = "Green", command = lambda : bColor("green"))

#label.pack()

exbtn.pack(anchor = S, side = RIGHT, padx = 5, pady = 5)
bluebtn.pack(anchor = S, side = RIGHT, padx = 5, pady = 5)
greenbtn.pack(anchor = S, side = RIGHT, padx = 5, pady = 5)

root.mainloop()

* 結果

## 影像功能鈕
* 範例

def msgShow():
    label.config(text = "純測試用", bg = "red", fg = "green")

# 接續
image = Image.open("ball.jpg")
Ball = ImageTk.PhotoImage(image)

label = Label(root)

btn = Button(root, image = Ball, command = msgShow)

label.pack()
btn.pack()

* 結果

## 添加游標
* 使用cursor :point_down:

btn = Button(root, image = Ball, command = msgShow, cursor = "heart")

* 這個部分的圖片就給你們自行去實踐了

{%hackmd S1DMFioCO %}