Tkinter Events

A help on Tkinter events

Tkinter is an event driven based library, it means that tkinter has a mainloop that processes events then dispatch them. There are handles/functions that are mapped to these events, whenever an event occurs a handle is called with an object that characterizes the event.

The kind of events that are used in most with vy are the ones that happen when a key is pressed. A set of common events that happen when keys get pressed is shown below:

It means that the key 'h' was pressed while the Control key is kept pressed.
<Control-h> 

It means that the key 'F1' was pressed.
<F1>

It means that the key 'h' was pressed regardless of it being released.
<KeyPress-h>

It means that the key 'h' was released.
<KeyRelease-h>

The return key/enter.
<Return>

The key '1' was pressed.
<Key-1>

Other events that may be interesting are:

It happens when an widget gets focus, like when you click on it with the mouse.
<FocusIn>

When an widget loses focus.
<FocusOut>

It happens when a file is loaded in a given AreaVi instance.
<<LoadData>>

It happens when data is saved in a given AreaVi instance.
<<SaveData>>

These events are passed as strings to the Widget.bind method. The AreaVi class inherits such a method but it uses another method to map events to callbacks.