add: fontchooser

filechooser.lua

@@ -1,6 +1,7 @@
 require "rendertext"
 require "keys"
 require "graphics"
+require "fontchooser"
 
 FileChooser = {
 	-- Class vars:
@@ -83,7 +84,7 @@ function FileChooser:choose(ypos, height)
 	local pagedirty = true
 	local markerdirty = false
 
-	prevItem = function ()
+	local prevItem = function ()
 		if self.current == 1 then
 			if self.page > 1 then
 				self.current = perpage
@@ -96,7 +97,7 @@ function FileChooser:choose(ypos, height)
 		end
 	end
 
-	nextItem = function ()
+	local nextItem = function ()
 		if self.current == perpage then
 			if self.page < (self.items / perpage) then
 				self.current = 1
@@ -174,6 +175,14 @@ function FileChooser:choose(ypos, height)
 				elseif self:rotationMode() == 3 then
 					prevItem()
 				end
+			elseif ev.code == KEY_F then
+				FontChooser:init()
+				newfont = FontChooser:choose(0, height)
+				if newfont ~= nil then
+					self.face = freetype.newBuiltinFace(newfont, 25)
+					clearglyphcache()
+				end
+				pagedirty = true
 			elseif ev.code == KEY_PGFWD then
 				if self.page < (self.items / perpage) then
 					if self.current + self.page*perpage > self.items then

fontchooser.lua

@@ -0,0 +1,135 @@
+require "rendertext"
+require "keys"
+require "graphics"
+
+FontChooser = {
+	-- font for displaying file/dir names
+	face = freetype.newBuiltinFace("sans", 25),
+	fhash = "s25",
+	-- font for page title
+	tface = freetype.newBuiltinFace("Helvetica-BoldOblique", 32),
+	tfhash = "hbo32",
+	-- font for paging display
+	sface = freetype.newBuiltinFace("sans", 16),
+	sfhash = "s16",
+	-- spacing between lines
+	spacing = 40,
+
+	-- state buffer
+	fonts = {"sans", "cjk", "mono", 
+		"Courier", "Courier-Bold", "Courier-Oblique", "Courier-BoldOblique",
+		"Helvetica", "Helvetica-Oblique", "Helvetica-BoldOblique",
+		"Times-Roman", "Times-Bold", "Times-Italic", "Times-BoldItalic",},
+	items = 14,
+	page = 1,
+	current = 2,
+	oldcurrent = 1,
+}
+
+function FontChooser:init()
+	self.items = #self.fonts
+	table.sort(self.fonts)
+end
+
+
+function FontChooser:choose(ypos, height)
+	local perpage = math.floor(height / self.spacing) - 1
+	local pagedirty = true
+	local markerdirty = false
+
+	local prevItem = function ()
+		if self.current == 2 then
+			if self.page > 1 then
+				self.current = perpage
+				self.page = self.page - 1
+				pagedirty = true
+			end
+		else
+			self.current = self.current - 1
+			markerdirty = true
+		end
+	end
+
+	local nextItem = function ()
+		if self.current == perpage then
+			if self.page < (self.items / perpage) then
+				self.current = 1
+				self.page = self.page + 1
+				pagedirty = true
+			end
+		else
+			if self.page ~= math.floor(self.items / perpage) + 1
+				or self.current + (self.page-1)*perpage < self.items then
+				self.current = self.current + 1
+				markerdirty = true
+			end
+		end
+	end
+
+	while true do
+		if pagedirty then
+			fb.bb:paintRect(0, ypos, fb.bb:getWidth(), height, 0)
+			renderUtf8Text(fb.bb, 30, ypos + self.spacing, self.tface, self.tfhash, "[ Fonts Menu ]", true)
+			local c
+			for c = 2, perpage do
+				local i = (self.page - 1) * perpage + c 
+				if i <= self.items then
+					renderUtf8Text(fb.bb, 50, ypos + self.spacing*c, self.face, self.fhash, self.fonts[i], true)
+				end
+			end
+			renderUtf8Text(fb.bb, 39, ypos + self.spacing * perpage + 32, self.sface, self.sfhash,
+				"Page "..self.page.." of "..(math.floor(self.items / perpage)+1), true)
+			markerdirty = true
+		end
+		if markerdirty then
+			if not pagedirty then
+				if self.oldcurrent > 0 then
+					fb.bb:paintRect(30, ypos + self.spacing*self.oldcurrent + 10, fb.bb:getWidth() - 60, 3, 0)
+						fb:refresh(1, 30, ypos + self.spacing*self.oldcurrent + 10, fb.bb:getWidth() - 60, 3)
+				end
+			end
+			fb.bb:paintRect(30, ypos + self.spacing*self.current + 10, fb.bb:getWidth() - 60, 3, 15)
+			if not pagedirty then
+				fb:refresh(1, 30, ypos + self.spacing*self.current + 10, fb.bb:getWidth() - 60, 3)
+			end
+			self.oldcurrent = self.current
+			markerdirty = false
+		end
+		if pagedirty then
+			fb:refresh(0, 0, ypos, fb.bb:getWidth(), height)
+			pagedirty = 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
+				prevItem()
+			elseif ev.code == KEY_FW_DOWN then
+				nextItem()
+			elseif ev.code == KEY_PGFWD then
+				if self.page < (self.items / perpage) then
+					if self.current + self.page*perpage > self.items then
+						self.current = self.items - self.page*perpage
+					end
+					self.page = self.page + 1
+					pagedirty = true
+				else
+					self.current = self.items - (self.page-1)*perpage
+					markerdirty = true
+				end
+			elseif ev.code == KEY_PGBCK then
+				if self.page > 1 then
+					self.page = self.page - 1
+					pagedirty = true
+				else
+					self.current = 2
+					markerdirty = true
+				end
+			elseif ev.code == KEY_ENTER or ev.code == KEY_FW_PRESS then
+				local newface = self.fonts[perpage*(self.page-1)+self.current]
+				return newface
+			elseif ev.code == KEY_BACK then
+				return nil
+			end
+		end
+	end
+end