-- Version 0.6

--[[-----------------------------------------------------------------------------------------
CueStaffTimeSig.test (0.6)  <http://nwsw.net/-f9770>

@TimeSigBeats
Show time signature at start of cue staff if > 0; default 0 (i.e., no time signature is shown).
@TimeSigBeatValue
Lower value of time signature; default 4.
  
@LeftSpace
Space to the left of the time signature
@RightSpace
Space to the right of the time signature

--]]-----------------------------------------------------------------------------------------

local userObjTypeName = ...
local cueStaffTypeName = 'CueStaff.hmm'

local _spec = {
  {id='TimeSigBeats', label='&Time sign.', type='int', default=4, min=1, max=99, width=7 },
  {id='TimeSigBeatValue', label='', type='enum', default='4', list={'1','2','4','8','16','32'}, separator=' ' },

  {id='LeftSpace', label='Space at &left...', type='float', default=0, min=0, max=30, step=0.1 },
  {id='RightSpace', label='...and &right', type='float', default=1, min=0, max=30, step=0.1, separator=' ' },
}

local function _create(t)
  t.Class = 'Standard'
  t.Pos = 0
end

local function timeSigWidth(t)
  local beatWidth = nwcdraw.calcTextSize('' .. t.TimeSigBeats)
  local beatValueWidth = nwcdraw.calcTextSize(t.TimeSigBeatValue)
  return t.LeftSpace + math.max(beatWidth, beatValueWidth) * 0.85 + t.RightSpace
end

local function getScale(cueStaff)
  return cueStaff:userProp('NoStaffScaling') and 1 or (cueStaff:userProp('Scaling') or 200) / 100, (cueStaff:userProp('Scaling') or 200) / 100
end

local widthCueStaff = nwc.ntnidx.new()

local function _width(t)
  widthCueStaff:find('prior', 'user', cueStaffTypeName)

  local staffScale, itemScale = getScale(widthCueStaff)

  local fontsize = nwcdraw.getFontSize()
  nwcdraw.setFontClass('StaffSymbols')
  nwcdraw.setFontSize(fontsize * 2 * staffScale)

  return timeSigWidth(t) 
end

local drawCueStaff = nwc.ntnidx.new()
local drawItem = nwcdraw.user.new()
local priorItem = nwcdraw.user.new()
local nextItem = nwcdraw.user.new()

local function drawTimeSig(t, x, staffScale)
  nwcdraw.alignText('baseline', 'center')
  nwcdraw.moveTo(x, 0)
  nwcdraw.text(t.TimeSigBeats)
  nwcdraw.moveTo(x, -4 * staffScale)
  nwcdraw.text(t.TimeSigBeatValue)
end

local function _draw(t)

  drawCueStaff:find('prior', 'user', cueStaffTypeName)

  local staffScale, itemScale = getScale(drawCueStaff)

  -- set font size for drawing
  local fontsize = nwcdraw.getFontSize()      
  nwcdraw.setFontClass('StaffSymbols')
  nwcdraw.setFontSize(fontsize * 2 * staffScale)

  if drawItem:isAutoInsert() then
    local xLeft = drawItem:xyAnchor()

    drawTimeSig(t, xLeft + timeSigWidth(t) / 2, staffScale)      
  else
    nextItem:find('next')
    priorItem:find('prior')
    local xMid = (priorItem:xyRight() + nextItem:xyAnchor()) / 2

    drawTimeSig(t, xMid, staffScale)
  end
end

return {
  spec   = _spec,
  create = _create,
  draw   = _draw,
  width  = _width,
}