Python GUI----Scale

Scale is the number range for the output limit, and you can specify a maximum value, a minimum value, and a stride value. The scale component defaults to vertical, a maximum value of 100, a minimum value of 0, and a step distance of 1

1. Create a scale

From tkinter Import *root = Tk () scale (root). Pack () Root.mainloop ()

2. Change the default value

From tkinter Import *root = Tk () scale (root,      from_ = -500,         #设置最大值 to      = $,             #设置最小值      Resolution = 5,
   
     #设置步距值      Orient = horizontal   #设置水平方向      ). Pack () Root.mainloop ()
   

3.Scale bound variable

From tkinter Import *root = Tk () v = stringvar () scale (root,      from_ = 0,                 #设置最小值 to      = 100.0,                #设置最大值      Resol Ution = 0.0001,       #设置步距值      orient = horizontal,       #设置水平方向      variable = v               #绑定变量      ). Pack () print (V.get ( ))                  #Scale的值一致root. Mainloop ()

4. Use the callback function to print the current value

From tkinter Import *root = Tk () def printscale (text): Print    (' Text = ', text)    print (' v = ', v.get ()) v = stringvar () scale (root,      from_ = 0,                #设置最小值 to      = 100.0,               #设置最大值      Resolution = 0.0001,      #设置步距值      Orient = horizontal,      #设置水平方向      variable = V,             #绑定变量      command = Printscale      #设置回调函数      ). Pack () Print (V.get ()) Root.mainloop ()

This callback function has a parameter, this value is the value of the current scale, each move a step will be called once this function, only ensure that the last one will definitely be called, the middle of the may not be called, by the above example can see the value is exactly the same.
5. Set the Label property of the scale label

From tkinter Import *root = Tk () scale (root,      from_ = 0, to                     = 100.0,                     orient = horizontal,            label = ' Choice: ',        #设置标签值      ). Pack () Root.mainloop ()

6. Set/Get the value of scale

From tkinter Import *root = Tk () SL = scale (root) sl.set      #将Scale的值设置为50print (Sl.get ())  #打印当前的Scale的值sl. Pack () Root.mainloop ()

Python GUI----Scale