Gui Gui programming (XV) - use scale to control font size changes

   

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Scale Move the slider

Scale( Move the slider ) Used in the specified value range , Move the slider to Select value .

Scale Widgets are used to implement python Application's graphical slider , So that the user can slide the value range displayed on the slider and select one of them . We can control the resolution of the minimum and maximum values as well as the scale . When the user is forced to select only one value from a given range of values , It provides Entry Alternatives to widgets . 

Use  

SN	Options	explain
1	activebackground	The background color of the widget when it has focus .
2	bg	The background color of the widget .
3	bd	The border size of the widget . The default value is 2 Pixels .
4	command	Set the steps to call each time you move the slider . If the slider moves quickly , The callback is completed at the end .
5	cursor	The mouse pointer changes to the cursor type assigned to this option . It can be an arrow , Point etc .
6	digits	If the control variable used to control the proportional data is a string type , This option is used to specify the number of digits when converting the numeric scale to a string .
7	font	Font type of widget text .
8	fg	The foreground color of the text .
9	from_	It is used to represent one end of the widget scope .
10	highlightbackground	Highlight color when the widget has no focus .
11	highlighcolor	Highlight color when widget has focus .
12	label	Can be set to some text , Can be displayed as a label with a ruler . If the scale is horizontal , Is displayed in the upper left corner ; If the scale is vertical , Is displayed in the upper right corner .
13	length	It represents the length of the widget . If the scale is horizontal , said X dimension ; If the scale is vertical , said y dimension .
14	orient	It can be set to horizontal or vertical according to the type of scale .
15	relief	It represents the type of boundary . The default value is FLAT.
16	repeatdelay	This option indicates the duration of pressing the button before the slider repeatedly starts moving in this direction . The default value is 300 millisecond .
17	resolution	Set to the minimum change in the scale value .
18	showvalue	By default , The scaled value is displayed in text . We can set this option to 0 With a prohibition label .
19	sliderlength	It represents the length of the slider window along the scale length . The default value is 30 Pixels . however , We can change it to an appropriate value .
20	state	By default ,scale Widget is active . We can set it to DISABLED To make it unresponsive .
21	takefocus	By default , The focus will cycle through the zoom widget . If we don't want this to happen , We can set this option to 0.
22	tickinterval	Proportional values are displayed in multiples of the specified tick interval . tickinterval The default value is 0.
23	to	It represents a floating-point or integer value , It specifies the other end of the range represented by the scale .
24	troughcolor	It represents the color of the passage .
25	variable	It represents the proportional control variable .
26	width	It represents the width of the penetration of the widget .

Method

SN	Method	explain
1	get（）	It is used to get the current value of the scale .
2	set（value）	The value used to set the scale .

Use Scale( Move the slider ) Control font size changes  

from tkinter import *

root = Tk();root.geometry("400x150")


def test1(value):
    print(" The value of the slider :",value)
    newFont = (" Song style ",value)
    a.config(font=newFont)


s1 = Scale(root,from_=10,to=50,length=200,tickinterval=5,orient=HORIZONTAL,command=test1)
s1.pack()

a = Label(root,text=" Progress Xiaobai ",width=10,height=1,bg="red",fg="white")
a.pack()


root.mainloop()

result ：