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Kaleidoscope/README.md

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# Kaleidoscope-MouseKeys
![status][st:stable] [![Build Status][travis:image]][travis:status]
[travis:image]: https://travis-ci.org/keyboardio/Kaleidoscope-MouseKeys.svg?branch=master
[travis:status]: https://travis-ci.org/keyboardio/Kaleidoscope-MouseKeys
[st:stable]: https://img.shields.io/badge/stable-✔-black.svg?style=flat&colorA=44cc11&colorB=494e52
[st:broken]: https://img.shields.io/badge/broken-X-black.svg?style=flat&colorA=e05d44&colorB=494e52
[st:experimental]: https://img.shields.io/badge/experimental----black.svg?style=flat&colorA=dfb317&colorB=494e52
Have you ever wanted to control the mouse cursor from the comfort of your
keyboard? With this plugin, you can. While it may not replace the mouse in all
situations, there are plenty of cases where one will not have to lift their
hands off the keyboard just to nudge the mouse cursor away a little.
Of course, there are a lot more one can do with the plugin than to nudge the
cursor! Mouse keys are provided for all four *and* diagonal movement; mouse
buttons; and a unique warping mechanism too. And not only these: the speed of
the cursor, the mouse wheel, and that of acceleration can all be configured to
match one's desired behaviour.
## Using the plugin
To use the plugin, simply include the header in your Sketch, tell the firmware
to use the `MouseKeys` object, and place mouse keys on your keymap. It is best
illustrated with an example:
```c++
#include <Kaleidoscope.h>
#include <Kaleidoscope-MouseKeys.h>
// Somewhere in the keymap:
Key_mouseUp, Key_mouseDn, Key_mouseL, Key_mouseR,
Key_mouseBtnL, Key_mouseBtnR
void setup() {
Kaleidoscope.use(&MouseKeys);
Kaleidoscope.setup ();
}
```
## Keys provided by the plugin
The plugin provides a number of keys one can put on the keymap, that allow
control of the mouse. They can be divided into a few groups:
### Cursor movement
The simplest set of keys are the mouse cursor movement keys. These move the
cursor one direction or the other, with speed and acceleration factored in. When
a mouse cursor movement key is held down, it will move `.speed` pixels each
`.speedDelay` milliseconds without acceleration. But when `.accelSpeed` is
non-zero (and it is not zero by default,
see [below](#accelspeed-and-acceldelay)), the speed will increase by
`.accelSpeed` every `.accelDelay` milliseconds. Thus, unless configured
otherwise, holding a direction will move that way at increasing speed.
One can hold more than one key down at the same time, and the cursor will move
towards a direction that is the combination of the keys held. For example,
holding the "mouse up" and "mouse right" keys together will move the cursor
diagonally up and right.
The cursor movement keys are as follows:
* `Key_mouseUp`, `Key_mouseDn`, `Key_mouseL`, `Key_mouseR`: Move the cursor up,
down, left, or right, respectively.
* `Key_mouseUpL`, `Key_mouseUpR`, `Key_mouseDnL`, `Key_mouseDnR`: Move the
cursor up-left, up-right, down-left, down-right, respectively.
### Scroll wheel
Controlling the scroll wheel is similarly simple. It does not have acceleration,
but one can control the speed with the `.wheelSpeed` and `.wheelDelay`
properties (see below).
* `Key_mouseScrollUp`, `Key_mouseScrollDn`: Scroll the mouse wheel up or down,
respectively.
### Buttons
Buttons are even simpler than movement: there is no movement speed, nor
acceleration involved. One just presses them.
* `Key_mouseBtnL`, `Key_mouseBtnM`, `Key_mouseBtnR`: The left, middle, and right
mouse buttons, respectively.
### Warping
Warping is one of the most interesting features of the plugin, and is a feature
unique to Kaleidoscope, as far as we can tell. The warping keys position the
mouse cursor within a quadrant of the screen on first press, and any subsequent
taps will warp within the previously selected quadrant. For example, pressing
the north-west warp key twice will first jump to the middle of the north-west
quadrant of your screen, then select the north-west quadrant of that, and jump
to the middle of it.
To stop warping, use any other mouse key, or hit the "warp end" key.
This features works out of the box on Windows and OSX. On Linux, a patch exists,
but has not been finalised and merged yet.
The warping keys are the following:
* `Key_mouseWarpNW`, `Key_mouseWarpNE`, `Key_mouseWarpSW`, `Key_mouseWarpSE`:
Warp towards the north-west, north-east, south-west, or south-east quadrants,
respectively.
* `Key_mouseWarpEnd`: End the warping sequence, resetting it to the default
state. Using any of the warping keys after this will start from the whole
screen again.
## Plugin methods
The plugin provides a `MouseKeys` object, with the following methods and
properties available:
### `.speed` and `.speedDelay`
> These two control the speed of the mouse cursor, when a movement key is held.
> The former, `.speed`, controls the amount of pixels the cursor moves, when it
> has to move, and defaults to 1. The latter, `.speedDelay` is the amount of
> time - in milliseconds - to wait between two movements, and defaults to 0, no
> delay.
### `.accelSpeed` and `.accelDelay`
> These two properties control the speed of acceleration. The former,
> `.accelSpeed`, controls how much the speed shall be increased at each step,
> while the second, `.accelDelay`, controls how often (in milliseconds)
> acceleration should be applied.
>
> They default to 1 pixel and 50 milliseconds, respectively.
### `.wheelSpeed` and `.wheelDelay`
> The last two properties supported by the plugin control the mouse wheel
> scrolling speed. The former, `.wheelSpeed`, controls the amount of ticks the
> wheel shall scroll, and defaults to 1. The second, `.wheelDelay`, controls the
> delay between two scroll events, and defaults to 50 milliseconds.