# Pop Module

This is the main module that allows you to access everything else in Pop.Box.
Simply require it (`local pop = require "pop"`) and define LÖVE callbacks for:

- `pop.update(dt)`
- `pop.draw()`
- `pop.mousemoved(x, y, dx, dy)` (when using LÖVE 0.10.0 or later)
- `pop.mousepressed(x, y, button)`
- `pop.mousereleased(x, y, button)`
- `pop.keypressed(key)`
- `pop.keyreleased(key)`
- `pop.textinput(text)`

Every callback returns `true`/`false` for whether or not the event was handled.
For example, using the `mousepressed` event handler:

```lua
function love.mousepressed(x, y, button)
    local handled = pop.mousepressed(x, y, button)
    if not handled then
        -- do something useful
    end
end
```

## Creating Elements

Once `pop` has been required, you can create [Elements][1] and interact with
them. Most elements can be created like this: `local box = pop.box(...)`

However, if an element's name clashes with a function name used in Pop.Box, you
will have to use `pop.create(type, ...)` where `type` is a string naming the
element type.

When creating an element, the first argument is its parent element. If the first
argument is not an element, it will be treated as the second argument. If it is
`false`, then an element with no parent will be created. When no parent is
specified, an element's parent is `pop.screen`, which is the top-level element
of Pop.Box.

(This behavior can be modified by elements themselves. No standard element does
 this, but if you use an element created by someone else, check its
 documentation first.)

## Skinning Elements

See the [Skins][2] documentation.

## Custom Elements/Skins/Extensions

Any `.lua` file placed in the `elements`, `skins`, and `extensions` directories
within the module will be loaded and available as appropriate. See the
documentation on each for how to make them:

- [Elements][1]
- [Skins][2]
- [Extensions][3]

Also of use, there is a separate set of docs about how Pop.Box works under the
surface: [Pop Module (dev)][4]

[1]: ./Elements.md
[2]: ./Skins.md
[3]: ./Extensions.md
[4]: ./dev/Pop.md