koreader/inputbox.lua

require "rendertext"
require "keys"
require "graphics"

InputBox = {
	-- Class vars:
	input_start_x = 145,
	input_start_y = nil,
	input_cur_x = nil, -- points to the start of next input pos

	input_bg = 0,

	input_string = "",

	shiftmode = false,
	altmode = false,

	-- font for displaying input content
	face = freetype.newBuiltinFace("mono", 25),
	fhash = "m25",
	fheight = 25,
	fwidth = 16,
}

function InputBox:setDefaultInput(text)
	self.input_string = ""
	self:addString(text)
	--renderUtf8Text(fb.bb, self.input_start_x, self.input_start_y,
								--self.face, self.fhash, text, true)
	--self.input_cur_x = self.input_start_x + (string.len(text) * self.fwidth)
	--self.input_string = text
end

function InputBox:addString(str)
	for i = 1, #str do
		self:addChar(str:sub(i,i))
	end
end

function InputBox:addChar(char)
	renderUtf8Text(fb.bb, self.input_cur_x, self.input_start_y, self.face, self.fhash,
								char, true)
	fb:refresh(1, self.input_cur_x, self.input_start_y-19, self.fwidth, self.fheight)
	self.input_cur_x = self.input_cur_x + self.fwidth
	self.input_string = self.input_string .. char
end

function InputBox:delChar()
	if self.input_start_x == self.input_cur_x then
		return
	end
	self.input_cur_x = self.input_cur_x - self.fwidth
	--fill last character with blank rectangle
	fb.bb:paintRect(self.input_cur_x, self.input_start_y-19, 
									self.fwidth, self.fheight, self.input_bg)
	fb:refresh(1, self.input_cur_x, self.input_start_y-19, self.fwidth, self.fheight)
	self.input_string = self.input_string:sub(0,-2)
end

function InputBox:drawBox(ypos, w, h, title)
	-- draw input border
	fb.bb:paintRect(20, ypos, w, h, 5)
	-- draw input slot
	fb.bb:paintRect(140, ypos + 10, w - 130, h - 20, self.input_bg)
	-- draw input title
	renderUtf8Text(fb.bb, 35, self.input_start_y, self.face, self.fhash,
		title, true)
end


--[[
	|| d_text default to nil (used to set default text in input slot)
--]]
function InputBox:input(ypos, height, title, d_text)
	local pagedirty = true
	-- do some initilization
	self.input_start_y = ypos + 35
	self.input_cur_x = self.input_start_x

	if d_text then -- if specified default text, draw it
		w = fb.bb:getWidth() - 40
		h = height - 45
		self:drawBox(ypos, w, h, title)
		self:setDefaultInput(d_text)
		fb:refresh(1, 20, ypos, w, h)
		pagedirty = false
	else -- otherwise, leave the draw task to the main loop
		self.input_string = ""
	end

	while true do
		if pagedirty then
			w = fb.bb:getWidth() - 40
			h = height - 45
			self:drawBox(ypos, w, h, title)
			fb:refresh(1, 20, ypos, w, h)
			pagedirty = false
		end

		local ev = input.waitForEvent()
		if ev.type == EV_KEY and ev.value == EVENT_VALUE_KEY_PRESS then
			ev.code = adjustFWKey(ev.code)
			--local secs, usecs = util.gettime()
			if ev.code == KEY_SHIFT then
				self.shiftmode = true
			elseif ev.code == KEY_ALT then
				self.altmode = true
			elseif ev.code == KEY_FW_UP then
			elseif ev.code == KEY_FW_DOWN then
			elseif ev.code == KEY_A then
				self:addChar("a")
			elseif ev.code == KEY_B then
				self:addChar("b")
			elseif ev.code == KEY_C then
				self:addChar("c")
			elseif ev.code == KEY_D then
				self:addChar("d")
			elseif ev.code == KEY_E then
				self:addChar("e")
			elseif ev.code == KEY_F then
				self:addChar("f")
			elseif ev.code == KEY_G then
				self:addChar("g")
			elseif ev.code == KEY_H then
				self:addChar("h")
			elseif ev.code == KEY_I then
				self:addChar("i")
			elseif ev.code == KEY_J then
				self:addChar("j")
			elseif ev.code == KEY_K then
				self:addChar("k")
			elseif ev.code == KEY_L then
				self:addChar("l")
			elseif ev.code == KEY_M then
				self:addChar("m")
			elseif ev.code == KEY_N then
				self:addChar("n")
			elseif ev.code == KEY_O then
				self:addChar("o")
			elseif ev.code == KEY_P then
				self:addChar("p")
			elseif ev.code == KEY_Q then
				self:addChar("q")
			elseif ev.code == KEY_R then
				self:addChar("r")
			elseif ev.code == KEY_S then
				self:addChar("s")
			elseif ev.code == KEY_T then
				self:addChar("t")
			elseif ev.code == KEY_U then
				self:addChar("u")
			elseif ev.code == KEY_V then
				self:addChar("v")
			elseif ev.code == KEY_W then
				self:addChar("w")
			elseif ev.code == KEY_X then
				self:addChar("x")
			elseif ev.code == KEY_Y then
				self:addChar("y")
			elseif ev.code == KEY_Z then
				self:addChar("z")
			elseif ev.code == KEY_1 then
				self:addChar("1")
			elseif ev.code == KEY_2 then
				self:addChar("2")
			elseif ev.code == KEY_3 then
				self:addChar("3")
			elseif ev.code == KEY_4 then
				self:addChar("4")
			elseif ev.code == KEY_5 then
				self:addChar("5")
			elseif ev.code == KEY_6 then
				self:addChar("6")
			elseif ev.code == KEY_7 then
				self:addChar("7")
			elseif ev.code == KEY_8 then
				self:addChar("8")
			elseif ev.code == KEY_9 then
				self:addChar("9")
			elseif ev.code == KEY_0 then
				self:addChar("0")
			elseif ev.code == KEY_SPACE then
				self:addChar(" ")
			elseif ev.code == KEY_PGFWD then
			elseif ev.code == KEY_PGBCK then
			elseif ev.code == KEY_ENTER or ev.code == KEY_FW_PRESS then
				if self.input_string == "" then
					return nil
				else
					return self.input_string
				end
			elseif ev.code == KEY_DEL then
				self:delChar()
			elseif ev.code == KEY_BACK then
				return nil
			end

			--local nsecs, nusecs = util.gettime()
			--local dur = (nsecs - secs) * 1000000 + nusecs - usecs
			--print("E: T="..ev.type.." V="..ev.value.." C="..ev.code.." DUR="..dur)
		elseif ev.type == EV_KEY and ev.value == EVENT_VALUE_KEY_RELEASE
		and ev.code == KEY_SHIFT then
			self.shiftmode = false
		elseif ev.type == EV_KEY and ev.value == EVENT_VALUE_KEY_RELEASE
		and ev.code == KEY_ALT then
			self.altmode = false
		end
	end
end