Tkinter 8.5 reference: a GUI for Python |  |
Tkinter has a powerful and general method for allowing you to define exactly which events, both specific and general, you want to bind to handlers.
In general, an event sequence is a string containing one or more event patterns. Each event pattern describes one thing that can happen. If there is more than one event pattern in a sequence, the handler will be called only when all the patterns happen in that same sequence.
The general form of an event pattern is:
<[modifier-]...type[-detail]>
The entire pattern is enclosed inside
<…>.The event type describes the general kind of event, such as a key press or mouse click. See Section 54.3, “Event types”.
You can add optional
modifierYou can add optional
detailThe usual setup has button 1 on the left and button 3 on the right, but left-handers can swap these positions.
For keys on the keyboard, this is either the key's character (for single-character keys like the
Aor*key) or the key's name; see Section 54.5, “Key names” for a list of all key names.
Here are some examples to give you the flavor of event patterns:
<Button-1>
| The user pressed the first mouse button. |
<KeyPress-H>
| The user pressed the H key. |
<Control-Shift-KeyPress-H>
| The user pressed control-shift-H. |