110 lines
2.4 KiB
Markdown
110 lines
2.4 KiB
Markdown
---
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title: Mouse Emulation Behaviors
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sidebar_label: Mouse Emulation
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---
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## Summary
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Mouse emulation behaviors send mouse movements, button presses or scroll actions.
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Please view [`dt-bindings/zmk/mouse.h`](https://github.com/zmkfirmware/zmk/blob/main/app/include/dt-bindings/zmk/mouse.h) for a comprehensive list of signals.
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## Configuration options
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This feature should be enabled via a config option:
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```
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CONFIG_ZMK_MOUSE=y
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```
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This option enables several others.
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### Dedicated thread processing
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`CONFIG_ZMK_MOUSE_WORK_QUEUE_DEDICATED` is enabled by default and separates the processing of mouse signals into a dedicated thread, significantly improving performance.
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### Tick rate configuration
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`CONFIG_ZMK_MOUSE_TICK_DURATION` sets the tick rate for mouse polling. It is set to 8 ms. by default.
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## Keycode Defines
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To make it easier to encode the HID keycode numeric values, most keymaps include
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the [`dt-bindings/zmk/mouse.h`](https://github.com/zmkfirmware/zmk/blob/main/app/include/dt-bindings/zmk/mouse.h) header
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provided by ZMK near the top:
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```
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#include <dt-bindings/zmk/mouse.h>
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```
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Doing so allows using a set of defines such as `MOVE_UP`, `MOVE_DOWN`, `LCLK` and `SCROLL_UP` with these behaviors.
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## Mouse Button Press
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This behavior can press/release up to 16 mouse buttons.
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### Behavior Binding
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- Reference: `&mkp`
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- Parameter: A `uint16` with each bit referring to a button.
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Example:
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```
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&mkp LCLK
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```
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## Mouse Movement
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This behavior is used to manipulate the cursor.
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### Behavior Binding
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- Reference: `&mmv`
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- Parameter: A `uint32` with the first 16 bits relating to horizontal movement
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and the last 16 - to vertical movement.
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Example:
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```
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&mmv MOVE_UP
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```
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## Mouse Scrolling
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This behaviour is used to scroll, both horizontally and vertically.
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### Behavior Binding
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- Reference: `&mwh`
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- Parameter: A `uint16` with the first 8 bits relating to horizontal movement
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and the last 8 - to vertical movement.
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Example:
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```
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&mwh SCROLL_UP
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```
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## Acceleration
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Both mouse movement and scrolling have independently configurable acceleration profiles with three parameters: delay before movement, time to max speed and the acceleration exponent.
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The exponent is usually set to 0 for constant speed, 1 for uniform acceleration or 2 for uniform jerk.
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These profiles can be configured inside your keymap:
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```
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&mmv {
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time-to-max-speed-ms = <500>;
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};
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&mwh {
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acceleration-exponent=<1>;
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};
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/ {
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keymap {
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...
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};
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};
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```
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