forked from forks/qmk_firmware
f0b30e0027
This converts the array that the Swap Hands feature uses to use PROGMEM, and to read from that array, as such. Since this array never changes at runtime, there is no reason to keep it in memory. Especially for AVR boards, as memory is a precious resource.
32 lines
2.2 KiB
Markdown
32 lines
2.2 KiB
Markdown
# Swap-Hands Action
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The swap-hands action allows support for one-handed typing without requiring a separate layer. Set `SWAP_HANDS_ENABLE` in the Makefile and define a `hand_swap_config` entry in your keymap. Now whenever the `ACTION_SWAP_HANDS` command key is pressed the keyboard is mirrored. For instance, to type "Hello, World" on QWERTY you would type `^Ge^s^s^w^c W^wr^sd`
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## Configuration
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The configuration table is a simple 2-dimensional array to map from column/row to new column/row. Example `hand_swap_config` for Planck:
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```C
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const keypos_t PROGMEM hand_swap_config[MATRIX_ROWS][MATRIX_COLS] = {
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{{11, 0}, {10, 0}, {9, 0}, {8, 0}, {7, 0}, {6, 0}, {5, 0}, {4, 0}, {3, 0}, {2, 0}, {1, 0}, {0, 0}},
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{{11, 1}, {10, 1}, {9, 1}, {8, 1}, {7, 1}, {6, 1}, {5, 1}, {4, 1}, {3, 1}, {2, 1}, {1, 1}, {0, 1}},
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{{11, 2}, {10, 2}, {9, 2}, {8, 2}, {7, 2}, {6, 2}, {5, 2}, {4, 2}, {3, 2}, {2, 2}, {1, 2}, {0, 2}},
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{{11, 3}, {10, 3}, {9, 3}, {8, 3}, {7, 3}, {6, 3}, {5, 3}, {4, 3}, {3, 3}, {2, 3}, {1, 3}, {0, 3}},
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};
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```
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Note that the array indices are reversed same as the matrix and the values are of type `keypos_t` which is `{col, row}` and all values are zero-based. In the example above, `hand_swap_config[2][4]` (third row, fifth column) would return `{7, 2}` (third row, eighth column). Yes, this is confusing.
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## Swap Keycodes
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|Key |Description |
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|-----------|-------------------------------------------------------------------------|
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|`SH_T(key)`|Sends `key` with a tap; momentary swap when held. |
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|`SH_ON` |Turns on swapping and leaves it on. |
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|`SH_OFF` |Turn off swapping and leaves it off. Good for returning to a known state.|
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|`SH_MON` |Swaps hands when pressed, returns to normal when released (momentary). |
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|`SH_MOFF` |Momentarily turns off swap. |
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|`SH_TG` |Toggles swap on and off with every key press. |
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|`SH_TT` |Toggles with a tap; momentary when held. |
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|`SH_OS` |One shot swap hands: toggles while pressed or until next key press. |
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