@p12Oph37
I’ve added some new features I needed to this library, hopefully it’s helpful. Would you be game for adding this code to github so we can manage changes easier? I haven’t tested this fully yet, but it does seem to work for my project.
My changes:
-
Added a newParagraph function with word-wrapping
-
Added support for tinting paragraphs (requires build 614+)
-
Fixed display issue (spacing) for fonts that use the outline effect
-
Fixed issue that caused some fonts height/width to be off by one pixel
Soon I’ll be adding:
[lua]module( …, package.seeall )
– AngelCode bitmap font support
require( ‘sprite’ )
– Specify an Angelcode format bitmap font definition file (".FNT")
– The spritesheet(s) that this file references need to be located in the resource directory.
– Return value is a font object that can be used when calling newString
function loadFont( fntFile )
local function extract( s, p )
return string.match( s, p ), string.gsub( s, p, ‘’, 1 )
end
local font = { info = {}, spritesheets = {}, sprites = {}, chars = {}, kernings = {} }
local readline = io.lines( system.pathForFile( fntFile, system.ResourceDirectory ) )
for line in readline do
local t = {}; local tag;
tag, line = extract( line, ‘^%s*([%a_]+)%s*’ )
while string.len( line ) > 0 do
local k, v
k, line = extract( line, ‘^([%a_]+)=’ )
if not k then break end
v, line = extract( line, ‘^"([^"]*)"%s*’ )
if not v then
v, line = extract( line, ‘^([^%s]*)%s*’ )
end
if not v then break end
t[k] = v
end
if tag == ‘info’ or tag == ‘common’ then
for k, v in pairs( t ) do font.info[k] = v end
elseif tag == ‘page’ then
font.spritesheets[1 + t.id] = { file = t.file, frames = {} }
elseif tag == ‘char’ then
t.letter = string.char( t.id )
font.chars[t.letter] = {}
for k, v in pairs( t ) do font.chars[t.letter][k] = v end
if 0 + font.chars[t.letter].width > 0 and 0 + font.chars[t.letter].height > 0 then
font.spritesheets[1 + t.page].frames[#font.spritesheets[ 1 + t.page].frames + 1 ] = {
–textureRect = { x = 0 + t.x, y = 0 + t.y, width = -1 + t.width, height = -1 + t.height }, --CLF removed the -1, it was causing issues with fonts with borders
textureRect = { x = 0 + t.x, y = 0 + t.y, width = t.width, height = t.height },
spriteSourceSize = { width = 0 + t.width, height = 0 + t.height },
spriteColorRect = { x = 0, y = 0, width = -1 + t.width, height = -1 + t.height },
spriteTrimmed = true
}
font.sprites[t.letter] = {
spritesheet = 1 + t.page,
frame = #font.spritesheets[1 + t.page].frames
}
end
elseif( tag == ‘kerning’ ) then
font.kernings[string.char( t.first ) … string.char( t.second )] = 0 + t.amount
end
end
for k, v in pairs( font.spritesheets ) do
font.spritesheets[k].sheet = sprite.newSpriteSheetFromData( v.file, v )
end
for k, v in pairs( font.sprites ) do
font.sprites[k] = sprite.newSpriteSet( font.spritesheets[v.spritesheet].sheet, v.frame, 1 )
end
return font
end
– extend an object with accessor behaviors
local function accessorize( t )
local mt = getmetatable( t )
setmetatable( t, {
__index = function( t, k )
if rawget( t, ‘get_’…k ) then
return rawget(t, ‘get_’…k )( t, k )
elseif rawget( t, ‘raw_’…k ) then
return rawget( t, ‘raw_’…k )
elseif mt.__index then
return mt.__index( t, k )
else
return nil
end
end,
__newindex = function( t, k, v )
if rawget( t, ‘set_’…k ) then
rawget( t, ‘set_’…k )( t, k, v )
elseif rawget( t, ‘raw_’…k ) then
rawset( t, ‘raw_’…k, v )
elseif mt.__newindex then
mt.__newindex( t, k, v )
else
rawset( t, ‘raw_’…k, v )
end
end,
} )
end
– extend an object with cascading removeSelf
local function removerize( t )
local old = t.removeSelf
t.removeSelf = function( o )
for i = o.numChildren, 1, -1 do o[i]:removeSelf() end
old( o )
end
end
– Pass a font object (obtained from loadFont) and a string to render
– Return value is a DisplayObject of the rendered string
– object.font can be read/modifed
– object.text can be read/modified
– object.align can be read/modified - left/right/center (multiline not yet fully supported for non-left)
– object.input( function(text), { filter = function(), max = 32 } )
– turns the object into a text input.
– the callback is hit when the user presses “return” or the field losed focus.
– this code is under development - more documentation will be added soon…
function newString( font, text )
local obj = display.newGroup()
accessorize( obj )
removerize( obj )
obj.set_font = function( t, k, v )
obj.raw_font = v
if t.text then t.text = t.text end
end
obj.set_align = function( t, k, v )
local w = t.contentWidth
if t.raw_align == ‘right’ then
for i = 1, t.numChildren do
t[i].x = t[i].x - w
end
elseif t.raw_align == ‘center’ then
for i = 1, t.numChildren do
t[i].x = t[i].x + math.floor( w * 0.5 )
end
end
t.raw_align = v
if t.raw_align == ‘right’ then
for i = 1, t.numChildren do
t[i].x = t[i].x + w
end
elseif t.raw_align == ‘center’ then
for i = 1, t.numChildren do
t[i].x = t[i].x - math.floor( w * 0.5 )
end
elseif t.raw_align ~= ‘left’ then
t.raw_align = ‘left’
end
end
obj.set_text = function( t, k, v )
t.raw_text = v
for i = t.numChildren, 1, -1 do t[i]:removeSelf() end
local oldAlign = ( t.align or ‘left’ )
t.align = ‘left’
local x = 0; local y = 0
local last = ‘’; local xMax = 0; local yMax = 0
if t.raw_font then
for c in string.gmatch( t.raw_text…’\n’, ‘(.)’ ) do
if c == ‘\n’ then
x = 0; y = y + t.raw_font.info.lineHeight
if y >= yMax then
yMax = y
end
elseif t.raw_font.chars[c] then
if 0 + t.raw_font.chars[c].width > 0 and 0 + t.raw_font.chars[c].height > 0 then
local letter = sprite.newSprite( t.raw_font.sprites[c] )
letter:setReferencePoint( display.TopLeftReferencePoint )
if t.raw_font.kernings[last … c] then
x = x + font.kernings[last … c]
end
letter.x = t.raw_font.chars[c].xoffset + x
letter.y = t.raw_font.chars[c].yoffset - t.raw_font.info.base + y
t:insert( letter )
last = c
end
–x = x + t.raw_font.chars[c].xadvance
x = x + t.raw_font.chars[c].xadvance + (t.raw_font.info.outline or 0) --CLF added support for outlines
if x >= xMax then
xMax = x
end
end
end
local background = display.newRect( 0, -t.raw_font.info.base, xMax, yMax )
background.isBackground = true --CLF Added to support tinting of font.
obj:insert( background )
background:setFillColor( 0, 0, 0, 0 )
end
t.align = oldAlign
end
obj.input = function( f, args )
– spawn the text field invisibly
local field
local function char()
– check if any character has been added or deleted
if field.text ~= ‘–’ then
if string.len( field.text ) < 2 then
– backspace was pressed
if string.len( obj.text ) > 0 then
obj.text = string.sub( obj.text, 1, -2 )
end
else
– some other key was pressed
obj.text = obj.text…string.sub( field.text, 3 )
end
field.text = ‘–’
if args.filter then
obj.text = string.sub( args.filter( obj.text ), 1, (args.max or 32) )
else
obj.text = string.sub( obj.text, 1, (args.max or 32) )
end
end
end
Runtime:addEventListener( ‘enterFrame’, char )
local function done( e )
if e.phase == ‘submitted’ or e.phase == ‘ended’ then
native.setKeyboardFocus( nil )
field:removeSelf()
Runtime:removeEventListener( ‘enterFrame’, char )
f( text )
end
end
field = native.newTextField( 0, 0, 240, 24, done )
field.text = ‘–’
field.isVisible = false
native.setKeyboardFocus( field )
end
obj.font = font
obj.align = ‘left’
obj.text = (text or ‘’)
return obj
end
function newParagraph(font, text, width)
local obj = display.newGroup()
accessorize( obj )
removerize( obj )
obj.set_font = function( t, k, v )
obj.raw_font = v
–if t.text then t.text = t.text end
end
obj.set_paragraphWidth = function( t, k, v )
obj.raw_paragraphWidth = v
–if t.text then t.text = t.text end
end
obj.set_tint = function( t, k, v )
obj.raw_tint = v
for i = t.numChildren, 1, -1 do
for j = t[i].numChildren, 1, -1 do
if(not t[i][j].isBackground) then
if v[4] then
t[i][j]:setFillColor(v[1],v[2],v[3],v[4])
else
t[i][j]:setFillColor(v[1]-i*2,math.random(1,255),v[3])
end
end
end
end
–if t.text then t.text = t.text end
end
obj.set_text = function(t, k, v)
–save the new raw text
t.raw_text = v
–remove all children
for i = t.numChildren, 1, -1 do t[i]:removeSelf() end
–determine the width of a space
local space = bmf.newString(font, " ")
local spaceWidth = space.raw_font.info.outline*-1 or 0
space:removeSelf()
space = nil
–Create our word-wrapped paragraph.
local spaceLeft = t.raw_paragraphWidth
local x, y = obj.x, obj.y
for word, spacer in string.gmatch(v, “([^%s%-]+)([%s%-]*)”) do
local w = bmf.newString(font, word…spacer)
print(w.width,“sw” , spaceWidth, “sl”, spaceLeft)
if(w.width + spaceWidth) > spaceLeft then
spaceLeft = t.raw_paragraphWidth - w.width - spaceWidth
y = y + w.raw_font.info.lineHeight
x = obj.x
w.x = x
else
w.x = x + t.raw_paragraphWidth - spaceLeft
spaceLeft = spaceLeft - w.width - spaceWidth
end
w.y = y
obj:insert(w)
end
end
obj.paragraphWidth = width or display.viewableContentWidth
obj.text = text
obj.font = font
obj.tint = {255,255,255}
return obj
end[/lua] [import]uid: 60707 topic_id: 6060 reply_id: 56614[/import]
[import]uid: 32962 topic_id: 6060 reply_id: 28687[/import]
[import]uid: 6086 topic_id: 6060 reply_id: 29083[/import]