-----------------------------
-- Levak ©2011 --------------
-- http://levak.free.fr/ ----
-- levak92@gmail.com --------
-----------------------------

------ Help management
Help = class(Screen)

function Help:paint(gc)
	local sX, sY = platform.window:width(), platform.window:height()

	-- window
	local W, H = xlarge*16, xlarge*10
	gc:setColorRGB(255, 255, 255)
	gc:setPen("thin", "smooth")
	gc:fillRect((sX - W) / 2, (sY - H) / 2, W, H)
	gc:setColorRGB(0, 0, 0)
	gc:setPen("thin", "dashed")
	gc:drawRect((sX - W) / 2, (sY - H) / 2, W, H)
	
	-- text 
	local title = "Sudoku"
	local author = "Levak ©2011"
	local website = "http://levak.free.fr, http://www.inspired-lua.org"
	
	local margin = normal
	local x, y = (sX - W) / 2 + margin, (sY - H) / 2 + margin
	gc:setColorRGB(0, 0, 0)
	gc:setFont("sansserif", "b", fxxlarge)
	gc:drawString(title, x, y, "top")
	gc:setFont("sansserif", "r", fxxsmall)
	gc:drawString(author, x + #title*xxlarge, y + xxlarge, "middle")
	y = y + normal + xxlarge
	gc:setFont("sansserif", "r", fxsmall)
	gc:drawString(website, x, y, "top")
	
	y = y + normal + small
	gc:drawString("Shortcuts :", x, y, "top")
	y = y + normal
	gc:drawString("s       Display/Hide the grid solution", x, y, "top")
	y = y + normal
	gc:drawString("c       Display/Hide the grid checker", x, y, "top")
	y = y + normal
	gc:drawString("p       Pause/Unpause the game", x, y, "top")
	y = y + normal
	gc:drawString("1 - 9  Place a number", x, y, "top")
	y = y + normal
	
	gc:drawString("0       Erase a number", x, y, "top")
	

	paused = true
end

function Help:escapeKey()
	PullScreen()
	paused = false
	platform.window:invalidate()
end

-- non used events
function Help:charIn(ch) end
function Help:arrowKey(key) end
function Help:enterKey() end
function Help:help() end
function Help:mouseUp() end
function Help:contextMenu() end