# Kaleidoscope-LED-Palette-Theme A common base for plugins that want to provide themes, or theme-related capabilities, using a 16 color palette. In other words, this is for plugin authors primarily. The primary aim of the plugin is to provide not only a common palette, but tools that make it easier to use it too. ## Using the plugin To use the plugin, one needs to do a bit more than include the header, and tell the firmware to use it. Itself being a mere building block, to use it to its full extent, we need to create our own plugin on top of it. ```c++ #include <Kaleidoscope.h> #include <Kaleidoscope-EEPROM-Settings.h> #include <Kaleidoscope-LED-Palette-Theme.h> #include <Kaleidoscope-FocusSerial.h> namespace example { class TestLEDMode : public LEDMode { public: TestLEDMode() {} protected: void setup(void) final; void update(void) final; kaleidoscope::EventHandlerResult onFocusEvent(const char *command); private: static uint16_t map_base_; }; uint16_t TestLEDMode::map_base_; void TestLEDMode::setup(void) { map_base_ = LEDPaletteTheme.reserveThemes(1); } void TestLEDMode::update(void) { LEDPaletteTheme.updateHandler(map_base_, 0); } kaleidoscope::EventHandlerResult TestLEDMode::onFocusEvent(const char *command) { return LEDPaletteTheme.themeFocusEvent(command, PSTR("testLedMode.map"), map_base_, 1); } } example::TestLEDMode TestLEDMode; KALEIDOSCOPE_INIT_PLUGINS( Focus, LEDPaletteTheme, TestLEDMode, EEPROMSettings ); void setup() { Kaleidoscope.setup(); TestLEDMode.activate(); } ``` This is a simple extension, where it provides a `testLEDMode.map` Focus command, with which one can set the theme which will be saved to EEPROM. ## Plugin methods The plugin provides the `LEDPaletteTheme` object, which has the following methods and properties: ### `.reserveThemes(max_themes)` > Reserve space in EEPROM for `max_themes`. Each key on a theme uses half a byte > of space. The function returns the `theme_base` to be used with the rest of > the methods. > > The `theme_base` is a pointer into the EEPROM where the theme storage starts. ### `.updateHandler(theme_base, theme)` > A helper we can call in our plugin's `.update()` method: given an EEPROM > location (`theme_base`), and a `theme` index, it will update the keyboard with > the colors of the specified theme. > > The `theme` argument can be any index between zero and `max_themes`. How the > plugin decides which theme to display depends entirely on the plugin. ### `.themeFocusEvent(command, expected_command, theme_base, max_themes)` > To be used in a custom `Focus` handler: handles the `expected_command` Focus > command, and provides a way to query and update the themes supported by the > plugin. > > When queried, it will list the color indexes. When used as a setter, it > expects one index per key. > > The palette can be set via the `palette` focus command, provided by the > `LEDPaletteTheme` plugin. ## Focus commands ### `palette` > Without arguments, prints the palette: RGB values for all 16 colors. > > With arguments, updates the palette with new colors. One does not need to give > the full palette, the plugin will process as many arguments as available, and > ignore anything past the last index. It expects colors to have all three > components specified, or none at all. Thus, partial palette updates are > possible, but only on the color level, not at component level. ## Dependencies * [Kaleidoscope-EEPROM-Settings](EEPROM-Settings.md) * [Kaleidoscope-FocusSerial](FocusSerial.md) * [Kaleidoscope-LEDControl](LEDControl.md) ## Further reading Starting from the [example][plugin:example] is the recommended way of getting started with the plugin. [plugin:example]: ../../examples/LED-Palette-Theme/LED-Palette-Theme.ino