## 20240224 python 筆記
### tkinter:check box
IntVar():創建一個整數變數
booleanVar():創建boolean變數(0 or 1)-->0nvalue改成1,offvalue改成0
StringVar():--->onvalue/offvalue改成"True"/"False"
但都需要get()

from tkinter import*
def show_result():
    if x.get()==1:  #要get()取得值
        print("i agree")
    else:
        print("no")

    

window=Tk()
window.geometry("200x200")

x=IntVar()  #建立一個整數變數

button=Checkbutton(window,
                   text="agree",
                   variable=x,
                   onvalue=1,   #checkbox 被選取時給x的值
                   offvalue=0, #checkbox 被取消選取時給x的值
                   command=show_result
                   #image=image_name    #加入icon
                   #compound=right/left #checkbox在icon的右/左邊
                   )
button.pack()
window.mainloop()

### radio_button
like checkbox but there are many choices.we can choose one of the group.

from tkinter import *
food=["apple","fish","meat"]    #要將每一格選項都有一個button
def show():
    print(x.get())
window=Tk()
x=IntVar()
for i in range(len(food)):
    radio_button=Radiobutton(window,
                             text=food[i],
                             variable=x,    #value會把值傳給variable,而3個button共用一格variable
                             value=i,   #每一個選項都賦予不同的value才有辦法選擇
                             indicatoron=0, #取消圓圈button,為選擇文字框
                             command=show)
    radio_button.pack()

window.mainloop()

### sliding_scale:

from tkinter import*
window=Tk()

def submit():
    print(sliding_scale.get())  #取得sliding sacle裡的value

sliding_scale=Scale(window, #create a sliding scale
                    from_=100,
                    to=0,
                    length=600, #the size of sliding_scale
                    orient=HORIZONTAL,  #orientation of scale
                    tickinterval=20,    #the interval of the scale
                    showvalue=0,
                    troughcolor="blue")     
sliding_scale.pack()

sliding_scale.set(50)   #set initial value

button=Button(window,text="submit",command=submit)
button.pack()

window.mainloop()

### listbox
a list of selectable text items in the container

from tkinter import*

def submit():
    print(listbox.get(listbox.curselection()))  #listbox.curseletion() 回傳選定的"index",再用get(index)取其值
    # color=[]
    # for i in listbox.curselection():
    #     color.insert(i,listbox.get(i))    #multiple selectiono 
    # print(color)
def add():
    listbox.insert(listbox.size(),entry.get())  #insert(index,value),插入在entrybox中輸入的內容
    listbox.config(height=listbox.size())   #新增後更新listbox大小

def delete():
    listbox.delete(listbox.curselection())  #listbox.delete(index)
    listbox.config(height=listbox.size())

window=Tk()

listbox=Listbox(window, #create a listbox
                background="#f7ffde",
                font=("Constantia",20),
                #selectmode=MULTIPLE    #一次選擇多格
                )


listbox.insert(0,"red") #在listbox中插入新選項(index,value)
listbox.insert(1,"green")
listbox.insert(2,"blue")
listbox.insert(3,"yellow")

entry=Entry(window) #create a entrybox

submit_button=Button(window,text="submit",command=submit)
add_button=Button(window,text="add",command=add)
delete_button=Button(window,text="delete",command=delete)

listbox.config(height=listbox.size())
listbox.pack()
submit_button.pack()
add_button.pack()
delete_button.pack()
entry.pack()


window.mainloop()

### messagebox
創建彈出視窗
純視窗(只包含確定按鈕)
messagebox.showinfo(title="",message="")
messagebox.showwarning(title="",message="")
messagebox.showerror(title="",message="")

ask(多選項):會回傳true/false
messagebox.askokcancel(title="",message="")
messagebox.askretrycancel(titile="",message="")
messagebox.askyesno(title="",message="")
messagebox.askyesnocancel(title="",message="")

回傳"yes"/"no"
messagebox.askquestion(title="",message="")

from tkinter import *
from tkinter import messagebox

def click():
    #messagebox.showinfo(title="this is a messagebox",message="hello")
    # if messagebox.askokcancel(title="",message="do u want it?") == True:
    #     print("yes")
    # else:
    #     print("no")

    answer=messagebox.askquestion(title="",message="what")
    if answer=="yes":   #askquestion 為yes!!!
        print("true")
    else:
        print("n")

screen=Tk()
button=Button(screen,text="click",command=click)
button.pack()

screen.mainloop()