python--tkinter03

1. scale scroll bar

import tkinter as tk
window = tk.Tk()
window.title("The window")
window.geometry("400x300")

l = tk.Label(window,bg='yellow',text='empty')
l.pack()

def print_selection(v):
    #The parameter v here is the data of the scroll bar positioning
    #config Modify the content in text
    l.config(text='you have selected ' + v)

#slider scale, the name of the label scale widget, from_ to slide from 1 to 20 value range,
# orinent tk.HORIZONTAL here is to set the scroll bar at ease, for the horizontal
#resolution 0.01 keep several decimal places and keep 2 places
#showvalue 0 does not display numbers 1 displays numbers, what is the interval of tickinterval 2
s = tk.Scale(window,label='try me',from_=1,to=11,orient=tk.HORIZONTAL,
             length=400,showvalue=1,tickinterval=2,resolution=0.01,command=print_selection)
s.pack()
window.mainloop ()

2、Checkbutton

#checkbutton Check option
import tkinter as tk
window = tk.Tk()
window.title("The window")
window.geometry("400x300")

l = tk.Label(window,bg='red',width=20,text='empty')
l.pack()

def print_selection():
    if(var1.get() == 1) & (var2.get() == 0):
        l.config(text="I love only python ")
    elif(var1.get() == 0) & (var2.get() == 1):
        l.config(text="I love only C++ ")
    elif(var1.get() == 0) & (var2.get() == 0):
        l.config(text = "I do not love either")
    else:
        l.config(text='I love both')
        
var1 = tk.IntVar ()
var2 = tk.IntVar ()
#Create a checkbutton component, the parameter onvalue is similar to the value in the radiobutton component mentioned earlier,
#When we select this checkbutton, the value of onvalue 1 will be put into var1, and then var1 will assign it to the parameter variable,
The usage of #offvalue is similar, but offvalue is when the checkbutton is not selected, the value of offvalue 1 is put into var1,
#Then assign it to the parameter variable This is to create a checkbutton component, and so on, you can create multiple checkbuttons
c1 = tk.Checkbutton(window,text='Python',variable=var1,onvalue=1,offvalue=0,
                   command=print_selection)
c1.pack()
c2 = tk.Checkbutton(window,text='C++',variable=var2,onvalue=1,offvalue=0,
                   command=print_selection)
c2.pack()
window.mainloop ()

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