ML Menu state toggler

Toggler 2.lua

--[[ 	
	Still photography toggler script
	NOTE: Tested on a 5D3 and 50D
	Version 2 (should work on all ML enabled cameras with the Lua module BUT maybe not the EOSM)
	Garry George June 2016
	http://photography.grayheron.net/
	Toggles through ML settings using the multi-controller toggle, plus a button you rarely use.
	Must be in LV.
--]]

-- Declare some variables
toggler_play = 1
toggler = KEY.RATE -- change this to your choice, eg PLAY
frsp = false
frsp_ok = false
iso = false
iso_delta = 0
iso_apex = 5
iso_toggled = false
enabled = true
toggled = 0

-- Change toggler value to your choice of button, eg KEY.RATE or KEY.PLAY.
-- See http://davidmilligan.github.io/ml-lua/modules/constants.html for key constants
-- Default is KEY.RATE																										

function property.SHUTTER:handler(value) -- Check if shutter value changed between toggles
	if keymenu.submenu["Enabled?"].value == "Yes" and frsp then -- then need to recheck FRSP values in case user changes shutter speed
		if camera.shutter.value < 0.2 or camera.shutter.value > 14 then 
			frsp_ok = false  -- outside FRSP range
			menu.set("Shoot","Silent Picture",0)
		else
			frsp_ok = true -- Good to go with FRSP
			menu.set("Shoot","Silent Picture",1)
		end
	end
end

toggler_presets =
{
    {
        name = "OFF ", -- Toggler active but all ML Toggler menus turned off
        menus=
        {
			{ menu = "Shoot", item = "Advanced Bracket", value = 0},
			{ menu = "Shoot", item = "Silent Picture", value = 0},
			{ menu = "Expo", item = "Auto ETTR", value = 0},
			{ menu = "Expo", item = "Dual ISO", value = 0},
        }
    },
    {
        name = "ETTR",
        menus=
        {
			{ menu = "Shoot", item = "Advanced Bracket", value = 0},
			{ menu = "Shoot", item = "Silent Picture", value = 0},
			{ menu = "Expo", item = "Auto ETTR", value = 1},
			{ menu = "Expo", item = "Dual ISO", value = 0},
        }
    },
    {
        name = "DUAL",
        menus=
        {
			{ menu = "Shoot", item = "Advanced Bracket", value = 0},
			{ menu = "Shoot", item = "Silent Picture", value = 0},
			{ menu = "Expo", item = "Auto ETTR", value = 0},
			{ menu = "Expo", item = "Dual ISO", value = 1},
        }
    },
    {
        name = "BRAC",
        menus=
        {
			{ menu = "Shoot", item = "Advanced Bracket", value = 1},
			{ menu = "Shoot", item = "Silent Picture", value = 0},
			{ menu = "Expo", item = "Auto ETTR", value = 0},
			{ menu = "Expo", item = "Dual ISO", value = 0},
        }
    },
    {
        name = "FRSP",
        menus=
        {
			{ menu = "Shoot", item = "Advanced Bracket", value = 0},
			{ menu = "Shoot", item = "Silent Picture", value = 1},
			{ menu = "Expo", item = "Auto ETTR", value = 0},
			{ menu = "Expo", item = "Dual ISO", value = 0},
        }
    },
    {
        name = "ISO ",
        menus=
        {
			{ menu = "Shoot", item = "Advanced Bracket", value = 0},
			{ menu = "Shoot", item = "Silent Picture", value = 0},
			{ menu = "Expo", item = "Auto ETTR", value = 0},
			{ menu = "Expo", item = "Dual ISO", value = 0},
        }
    }
}
-- You can add other ML 'menu states' by extending the above list or change what each toggled state does by adding or subtracting menu references

event.keypress = function(key)
	if keymenu.submenu["Enabled?"].value == "No" then -- Toggler does nothing and shows no menu states
		return true  
	else -- Toggler active, and can be enabled and disabled by toggling the Toggler button
		if key == toggler then enabled = not enabled return false end -- Enable/disable Toggler 
		if enabled then -- look to see what to do
			if key == KEY.LEFT then 
				toggled = -1
				return false
			elseif key == KEY.RIGHT then 
				toggled = 1 
				return false
-- Note the following is necessary to account for some 'Lua strangeness', where, from my experience, the 5D3 and 50D return different codes when the 
-- multi functional switch is unpressed
			elseif (key == KEY.UNPRESS_UDLR or key == KEY.UNPRESS_DP) and not iso_toggled then -- toggled left or right
				iso = false
				toggler_play = toggler_play + toggled
				toggled = 0
				if toggler_play > #toggler_presets then toggler_play = 1 end
				if toggler_play < 1 then toggler_play = #toggler_presets end
				for i,v in ipairs(toggler_presets[toggler_play].menus) do
					menu.set(v.menu,v.item,v.value)
				end
				if toggler_presets[toggler_play].name == "FRSP" then frsp = true else frsp = false end -- check if FRSP set to ON in this toggle
				if toggler_presets[toggler_play].name == "ISO " then iso = true else iso = false end -- check if ISO set to ON in this toggle
				if frsp then -- check shutter values following toggle and FRSP requested
					if camera.shutter.value < 0.2 or camera.shutter.value > 14 then 
						frsp_ok = false  -- outside FRSP range
						menu.set("Shoot","Silent Picture",0)
					else 
						frsp_ok = true -- Good to go with FRSP
						menu.set("Shoot","Silent Picture",1)
					end
				end
				return false
			elseif key == KEY.UP or key == KEY.UP_RIGHT or key == KEY.UP_LEFT then
					if iso then -- change iso
					iso_delta = 0.333
					iso_toggled = true
					toggled = 0
					else
					iso_delta = 0
					iso_toggled = false
					toggled = 0
					end
					return false
			elseif key == KEY.DOWN or key == KEY.DOWN_RIGHT or key == KEY.DOWN_LEFT then 
					if iso then -- change iso
					iso_delta = -0.333
					iso_toggled = true
					toggled = 0
					else
					iso_delta = 0
					iso_toggled = false
					toggled = 0
					end
					return false
-- Same comment as above
			elseif (key == KEY.UNPRESS_UDLR or key == KEY.UNPRESS_DP) and iso_toggled then -- ISO increased or decresed
					iso_toggled = false
					iso_apex = camera.iso.apex + iso_delta
					if iso_apex < 5 then iso_apex = 5 end
					camera.iso.apex = iso_apex
				return false
			else
				iso_delta = 0
				toggled = 0
				return true
			end
		end
	end
end

lv.info
{
	name = "Info 1",
	priority = 100,
	value = "",
	update = function(this)
	this.background = COLOR.BLUE
	this.foreground = COLOR.YELLOW
	if keymenu.submenu["Enabled?"].value == "Yes" and enabled then
		if frsp then -- FRSP requested then need to feedback FRSP shutter speed is OK or not
			if not frsp_ok then this.foreground = COLOR.RED end
		end
		this.value = toggler_presets[toggler_play].name
	else
		this.value = ""
	end
	end
}

keymenu = menu.new
{
	parent = "Shoot",
	name = "Toggler",
	help = "Toggle through various ML options",
	depends_on = DEPENDS_ON.LIVEVIEW,
	submenu =
	{
		{
			name = "Enabled?",
			help = "Switches the script on/off",
			choices = {"No","Yes"},
			icon_type = ICON_TYPE.BOOL,
			value = "Yes", -- ensures script loaded and active on camera start
			select = function(this)
				if this.value == "Yes" then
					this.value = "No"
				else
					this.value = "Yes"
				end
-- Reset Toggler if enabled state changed
				menu.set("Shoot","Silent Picture",0)
				menu.set("Shoot","Advanced Bracket",0)
				menu.set("Expo","Auto ETTR",0)
				menu.set("Expo","Dual ISO",0)	
				toggler_play = 1
				frsp = false
				iso = false
				iso_delta = 0
			end
		}
	}
}