button(State, 'link', {x=State.left+lo, y=y, w=hi-lo, h=State.line_height, bg={r=1,g=1,b=1},

          button(State, 'link', {x=State.left+lo, y=y, w=hi-lo, h=State.line_height,

    button(state, name, {x=..., y=..., w=..., h=..., color={r,g,b},

    button(state, name, {x=..., y=..., w=..., h=..., bg={r,g,b},

  Call this either directly or indirectly from `App.draw`. It will paint a
  rectangle to the screen with top-left at (x,y), dimensions w×h pixels in the
  specified `color`. It will then overlay any drawing instructions within
  `icon` atop it. The `icon` callback will receive a table containing the same
  x/y/w/h.

  Call this either directly or indirectly from `App.draw`. It will assign a
  rectangle with the given dimensions and trigger the provided (zero-arg)
  `onpress1` callback when the primary mouse button is clicked within.
  It will also optionally paint the rectangle with the specified background
  color `bg` and a foreground described by the `icon` callback (which will
  receive the same dimensions).

  The rectangle also registers within `state` the `onpress1` callback (without
  any arguments) when mouse button 1 is clicked on it. This way you can see
  everything about a button in one place. Create as many buttons as you like
  within a single shared `state`.

  This way you can see everything about a button in one place. Create as many
  buttons as you like within a single shared `state`.

  love.graphics.setColor(params.bg.r, params.bg.g, params.bg.b, params.bg.a)

  if params.bg then
    love.graphics.setColor(params.bg.r, params.bg.g, params.bg.b, params.bg.a)
  end