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custom widgets and classes

A class has methods that define behavior

The SoundPanel() class creates a new kind of tkinter Frame(), and you
can specify this relationship using the code like this: This is the class name.
This says that we are
defining a new CLASS. Indicate that the
class SoundPanel(Frame): new class is a type of
Frame.
The METHODs of the class go here.
The word “method” is used in OOP
instead of the word “function.”

As well as the what (it’s a frame), you also have to worry about the how, which
will define the behavior of your new widgets. To do this, you need to add
methods inside the class. To understand how this works, imagine you have
created an alarm button object from a class. The alarm button will need to
know what to do when somebody hits it:

Uh-oh, someone just
hit me. I‛d better ask
the class that made me
what I should do.

class AlarmButton(Frame):
This will be a method def button_hit(self):
inside the alarm
button's class. klaxon.hoot_loudly()
The method tells the button how to
behave when something happens.

You need to create some methods for the new SoundPanel()
class. Which of the following behaviors do you think you need to
create methods for? Draw a circle around each one:

Someone moves the volume slider. Someone clicks the checkbox.

The computer starts up. You get to the end of the track.

Create the interface.

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