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kmk_firmware/docs/leader.md
Kyle Brown c2c456ce1a Docs added
2020-11-13 23:27:48 -08:00

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# Leader Key
The leader key acts as a prefix to a key sequence. These can be used to trigger macros quickly
without dedicated keys set to each function. For those of you who dislike key combos, such as
Ctrl+Shift+Esc, then this feature is for you. This is very much inspired from vim.
## Keycode
|Key |Description |
|-----------------------|---------------------------------------------------------------------|
|`KC.LEAD` |The [Leader key] |
# Enabling the extention
```python
from kmk.extensions.leader import Leader
from kmk.handlers.sequences import send_string
leader_ext = Leader(}
)
keyboard.extensions.append(leader_ext)
```
Leader key sequences can be as long or short as you like. The action be a keycode, or
can be things like unicode macros, or generic macros. The example below shows how you would
trigger task manager in Windows with a leader sequence.
1. Assign a key to KC.LEAD
2. Above your keymap, include a LEADER_DICTIONARY.
```python
from kmk.macros.simple import simple_key_sequence
# ...
leader_ext = Leader(
sequences={
'task': : simple_key_sequence([Modifiers.KC_LCTRL(Modifiers.KC_LSHIFT(Common.KC_ESC))])
}
)
keymap = [...KC.LEAD,...]
# ...
```
# Modes
1. LeaderMode.TIMEOUT (the default)
2. LeaderMode.ENTER
### Timeout Mode
Will expire after a timer and trigger the sequence that matches if any. The default timeout is 1000ms
### Enter Mode
Has no timeout. To end sequence press the enter key, or cancel and do nothing, press escape.
## Changing defaults
To change the mode or timeout, add them here
```python
from kmk.extensions.leader import Leader, LeaderMode
leader_ext = Leader(
mode=LeaderMode.ENTER,
timeout=1000
sequences={
'hello': send_string('hello world from kmk macros'),
}
)
```