Document dilemma customization

_includes/use_keyboard_chary.md

@@ -64,13 +64,14 @@ Through VIA, you can customize:
 
 This is for advanced users. 
 
-For how to compile a custom hardware for your keyboard, take a look at the [how to compile your own firmware page][compile-firmware].
-
-For **advanced customization of the Charybdis and Charybdis Nano**, take a look at the [customize page][customize-chary].
+- how to compile a custom hardware for your keyboard: [how to compile your own firmware][compile-firmware].
+- advanced customization of the Charybdis (and smaller variants): [customize your Charybdis][customize-chary].
+- advanced customization of the Dilemma (and smaller variants): [customize your Dilemma][customize-dilemma].
 
 ---
 
 [customize-chary]: {{site.baseurl}}/fw/charybdis-features.html
+[customize-dilemma]: {{site.baseurl}}/fw/dilemma-features.html
 [keymaps]: {{site.baseurl}}/fw/default-keymaps.html
 [flashing]: {{site.baseurl}}/fw/flashing.html
 [compile-firmware]: {{site.baseurl}}/fw/compile-firmware.html

fw/dilemma-features.md

@@ -0,0 +1,163 @@
+---
+layout: default
+title: Dilemma Features
+nav_order: 2
+parent: Firmware
+---
+
+# Table of contents
+
+1. TOC
+{:toc}
+
+# Introduction
+
+All the features listed below are available in the Dilemma `vendor` keymaps.
+
+The `vendor` keymap aims at providing a consistent experience out of the box. Because some features can be mutually exclusive (e.g. [Auto sniping on layer](#auto-sniping-on-layer) and [Auto pointer layer](#auto-pointer-layer)), not all features are enabled by default. It may be necessary to rebuild the firmware to enable or disable some of the features listed below.
+
+# Dilemma features
+
+## Dilemma stock keymap
+
+- the stock keymaps are built off the `vendor` keymaps, and come with VIA enabled
+- you can find a visual reference of those keymaps on the [default keymaps page][keymaps]
+- you can find instructions on how to compile your own firmware on the [how to compile your firmware page][compile]
+
+## Trackpad related features
+
+Custom features were developed for the Dilemma, and have since been ported to QMK core.
+
+For each feature, there are:
+
+- custom keycodes you can implement in VIA or when [compiling your own firmware][compile]
+- custom defines to change the behavior of the feature
+- custom functions you can call to read or write options
+
+Those are detailed below.
+
+### DPI
+
+DPI (i.e. dots per linear inch), a.k.a. mouse sensitivity, can be controlled by the firmware. The Dilemma keymap offers 2 different DPI settings:
+
+- **Default** DPI: the sensitivity of the pointer in normal mode.
+- **Sniping** DPI: the sensitivity of the pointer in [sniping mode](#sniping)
+
+For each mode, the firmware allows cycling through multiple pre-defined values.
+
+- Default mode:
+    - Default value: 400 DPI
+    - 16 steps available
+    - Increments of 200 DPI
+    - Total range from 400 to 3,400 (400 → 600 → 800 → … → 3,400)
+- Sniping mode:
+    - Default value: 200 DPI
+    - 4 steps available
+    - Increments of 100 DPI
+    - Total range from 200 to 500 (200 → 300 → 400 → 500)
+
+The firmware _cycles_ through these values, which means that, for example, incrementing the sniping DPI of `500` by 1 step will loop back to `200`.
+
+You can cycle through those values by using custom keycodes (also present in the default keymap), and also [modify those values in your own firmware if needed.](#changing-dynamic-dpi-scaling-default-and-increment-values].
+
+Custom keycodes:
+
+| Name   | Description                                                  |
+| ------ | ------------------------------------------------------------ |
+| `DPI_MOD` | increase the sensitivity of the pointer movement by one step |
+| `DPI_RMOD` | decrease the sensitivity of the pointer movement by one step |
+
+
+Custom defines (with default values):
+
+```
+#define Dilemma_MINIMUM_DEFAULT_DPI 400
+#define Dilemma_DEFAULT_DPI_CONFIG_STEP 200
+```
+
+Custom functions:
+
+```c
+dilemma_cycle_pointer_default_dpi(bool forward) // cycle forward or backward the possible values
+dilemma_cycle_pointer_default_dpi_noeeprom(bool forward) // cycle forward or backward the possible values without persisting the change to EEPROM
+dilemma_get_pointer_default_dpi() // returns the current DPI value
+```
+
+
+### Sniping
+
+**Sniping mode** slows down the pointer for more precise gestures. It is useful when combined with a higher default DPI. Like the default pointer's DPI, the sniper mode DPI can be changed at runtime
+
+Custom Keycodes:
+
+| Name   | Description                                                                  |
+| ------ | ---------------------------------------------------------------------------- |
+| `S_D_MOD` | increase the sensitivity of the pointer movement in sniping mode by one step |
+| `S_D_RMOD` | decrease the sensitivity of the pointer movement in sniping mode by one step |
+| `SNIPING`  | enable sniping mode as long as the key is pressed                            |
+| `SNP_TOG` | toggle sniping mode on and off                                               |
+
+
+Custom defines (with default values):
+
+```
+#define DILEMMA_MINIMUM_SNIPING_DPI 200
+#define DILEMMA_SNIPING_DPI_CONFIG_STEP 100
+```
+
+Custom functions:
+
+```c
+dilemma_set_pointer_sniping_enabled(bool enable) // enable/disable sniping mode
+dilemma_get_pointer_sniping_enabled() // returns whether sniping mode is currently enabled
+dilemma_cycle_pointer_sniping_dpi(bool forward) // cycle forward or backward the possible values
+dilemma_cycle_pointer_sniping_dpi_noeeprom(bool forward) // cycle forward or backward the possible values without persisting the change to EEPROM
+dilemma_get_pointer_sniping_dpi() // returns the current sniping mode DPI value
+```
+
+### Auto sniping on layer
+
+You can trigger sniping automatically when on a specific layer by adjusting the following in your keymap:
+
+```
+#define DILEMMA_AUTO_SNIPING_ON_LAYER LAYER_POINTER
+```
+
+### Auto pointer layer
+
+You can trigger the pointer layer automatically upon moving the trackpad by adjusting the following in your keymap:
+
+```
+#define DILEMMA_AUTO_POINTER_LAYER_TRIGGER_ENABLE
+#define DILEMMA_AUTO_POINTER_LAYER_TRIGGER_TIMEOUT_MS 1000
+```
+
+### Drag-scroll
+
+**Drag-scroll** enables scrolling with the trackpad. When drag-scroll is enabled, the trackpad's `x` and `y` movements are converted into `h` (horizontal) and `v` (vertical) movement, effectively sending scroll instructions to the host system.
+
+Custom keycodes:
+
+| Name   | Description                                           |
+| ------ | ----------------------------------------------------- |
+| `DRGSCRL`  | enable drag-scroll mode as long as the key is pressed |
+| `DRG_TOG` | toggle drag-scroll mode on and off                    |
+
+Custom functions:
+
+```c
+dilemma_set_pointer_dragscroll_enabled(bool enable) // enable/disable drag-scroll
+dilemma_get_pointer_dragscroll_enabled() // returns whether drag-scroll mode is currently enabled
+```
+
+Custom defines:
+
+```
+#define DILEMMA_DRAGSCROLL_REVERSE_X // inverts horizontal scrolling 
+#define DILEMMA_DRAGSCROLL_REVERSE_Y // inverts vertical scrolling 
+```
+
+----
+
+[keymaps]: {{site.baseurl}}/fw/default-keymaps.html
+[compile]: {{site.baseurl}}/fw/compile-firmware.html