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# Kaleidoscope-LED-Stalker
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The `StalkerEffect` plugin provides an interesting new typing experience: the
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LEDs light up as you tap keys and play one of the selected effects: a haunting
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trail of ghostly white lights, or a blazing trail of fire.
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## Using the plugin
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To use the plugin, one needs to include the header and select the effect.
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```c++
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#include <Kaleidoscope.h>
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#include <Kaleidoscope-LEDControl.h>
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#include <Kaleidoscope-LED-Stalker.h>
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KALEIDOSCOPE_INIT_PLUGINS(LEDControl, StalkerEffect);
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void setup (){
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Kaleidoscope.setup();
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StalkerEffect.variant = STALKER(Haunt, (CRGB(0, 128, 0)));
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StalkerEffect.activate();
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}
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```
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It is recommended to place the activation of the plugin (the `Kaleidoscope.use`
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call) as early as possible, so the plugin can catch all relevant key presses.
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The configuration can happen at any time and should use the `STALKER` macro to
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do so.
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## Plugin methods
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The plugin provides the `StalkerEffect` object, which has the following
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properties:
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### `.variant`
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> Set the effect to use with the plugin. See below for a list.
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>
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> It is recommended to use the `STALKER` macro to declare the effect itself.
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### `.step_length`
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> The length - in milliseconds - of each step of the animation. An animation
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> lasts 256 steps.
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>
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> Defaults to 50.
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### `.inactive-color`
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> The color to use when a key hasn't been pressed recently.
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>
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> Defaults to `(cRGB) { 0, 0, 0 }`
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## Plugin helpers
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### `STALKER(effect, params)`
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> Returns an effect, to be used to assign a value the `.variant` property of the
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> `StalkerEffect` object. Any arguments given to the macro are passed on
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> to the effect. If the effect takes no arguments, use an empty `params` list.
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## Plugin effects
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The plugin provides the following effects:
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### `Haunt([color])`
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> A ghostly haunt effect, that trails the key taps with a ghostly white color
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> (or any other color, if specified). Use the `CRGB(r,g,b)` macro to specify the
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> color, if you want something else than the ghostly white.
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### `BlazingTrail()`
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> A blazing trail of fire will follow our fingers!
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### `Rainbow()`
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> Leave a rainbow behind, where your fingers has been!
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## Dependencies
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* [Kaleidoscope-LEDControl](LEDControl.md)
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## Further reading
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Starting from the [example][plugin:example] is the recommended way of getting
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started with the plugin.
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[plugin:example]: ../../examples/LED-Stalker/LED-Stalker.ino
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