Forgot to add the actual file chooser, do that now

filechooser.lua

@@ -0,0 +1,143 @@
+require "rendertext"
+require "keys"
+require "graphics"
+
+FileChooser = {
+	dirs = nil,
+	files = nil
+}
+
+function FileChooser:readdir(path)
+	self.dirs = {}
+	self.files = {}
+	for f in lfs.dir(path) do
+		if lfs.attributes(path.."/"..f, "mode") == "directory" and f ~= "." and not string.match(f, "^%.[^.]") then
+			table.insert(self.dirs, f)
+		elseif string.match(f, ".+%.[pP][dD][fF]$") then
+			table.insert(self.files, f)
+		end
+	end
+	table.sort(self.dirs)
+	table.sort(self.files)
+end
+
+function FileChooser:choose(startpath, ypos, height)
+	local face = freetype.newBuiltinFace("sans", 25)
+	local fhash = "s25"
+	local sface = freetype.newBuiltinFace("sans", 16)
+	local sfhash = "s16"
+	local path = startpath
+	local spacing = 40
+	local perpage = math.floor(height / spacing) - 1
+	local pathdirty = true
+	local pagedirty = false
+	local framebufferdirty = false
+	local markerdirty = true
+	local oldcurrent = 0
+	local page
+	local current
+	local items
+	while true do
+		if pathdirty then
+			print("showing file chooser in <"..path..">")
+			self:readdir(path)
+			items = #self.dirs + #self.files
+			if items == 0 then
+				return nil
+			end
+			page = 1
+			current = 1
+			pathdirty = false
+			pagedirty = true
+		end
+		if pagedirty then
+			fb.bb:paintRect(0, ypos, fb.bb:getWidth(), height, 0)
+			local c
+			for c = 1, perpage do
+				local i = (page - 1) * perpage + c
+				if i <= #self.dirs then
+					renderUtf8Text(fb.bb, 39, ypos + spacing*c, face, fhash, "/", true)
+					renderUtf8Text(fb.bb, 50, ypos + spacing*c, face, fhash, self.dirs[i], true)
+				elseif i <= items then
+					renderUtf8Text(fb.bb, 50, ypos + spacing*c, face, fhash, self.files[i-#self.dirs], true)
+				end
+			end
+			renderUtf8Text(fb.bb, 39, ypos + spacing * perpage + 32, sface, sfhash,
+				"Page "..page.." of "..(math.floor(items / perpage)+1), true)
+			framebufferdirty = true
+			markerdirty = true
+			pagedirty = false
+		end
+		if markerdirty then
+			if oldcurrent > 0 then
+				fb.bb:paintRect(30, ypos + spacing*oldcurrent + 10, fb.bb:getWidth() - 60, 3, 0)
+				fb:refresh(1, ypos + spacing*oldcurrent + 10, fb.bb:getWidth() - 60, 3)
+			end
+			fb.bb:paintRect(30, ypos + spacing*current + 10, fb.bb:getWidth() - 60, 3, 15)
+			fb:refresh(1, ypos + spacing*current + 10, fb.bb:getWidth() - 60, 3)
+			oldcurrent = current
+			markerdirty = false
+		end
+		local ev = input.waitForEvent()
+		if ev.type == EV_KEY and ev.value == EVENT_VALUE_KEY_PRESS then
+			if ev.code == KEY_FW_UP then
+				if current == 1 then
+					if page > 1 then
+						current = perpage
+						page = page - 1
+						pagedirty = true
+					end
+				else
+					current = current - 1
+					markerdirty = true
+				end
+			elseif ev.code == KEY_FW_DOWN then
+				if current == perpage then
+					if page < (items / perpage) then
+						current = 1
+						page = page + 1
+						pagedirty = true
+					end
+				else
+					if page ~= math.floor(items / perpage) + 1
+						or current + (page-1)*perpage < items then
+						current = current + 1
+						markerdirty = true
+					end
+				end
+			elseif ev.code == KEY_PGFWD then
+				if page < (items / perpage) then
+					if current + page*perpage > items then
+						current = items - page*perpage
+					end
+					page = page + 1
+					pagedirty = true
+				else
+					current = items - (page-1)*perpage
+					markerdirty = true
+				end
+			elseif ev.code == KEY_PGBCK then
+				if page > 1 then
+					page = page - 1
+					pagedirty = true
+				else
+					current = 1
+					markerdirty = true
+				end
+			elseif ev.code == KEY_ENTER or ev.code == KEY_FWPRESS then
+				local newdir = self.dirs[perpage*(page-1)+current]
+				if newdir == ".." then
+					path = string.gsub(path, "(.*)/[^/]+/?$", "%1")
+					pathdirty = true
+				elseif newdir then
+					path = path.."/"..newdir
+					pathdirty = true
+				else
+					return path.."/"..self.files[perpage*(page-1)+current - #self.dirs]
+				end
+			elseif ev.code == KEY_BACK then
+				return nil
+			end
+		end
+	end
+end