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how can i get charpos use variable a? — Gideros Forum
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    how can i get charpos use variable a?

    luyimoonluyimoon Member
    edited December 2021 in General questions
    local f = TTFont.new("simhei.ttf",40)
    local str = "一二三四五"
    local tf = TextField.new(f,str)
    local a,b,c = tf:getTextPositionFromPoint(0,tf:getWidth())
    -----------------------------------------------
    how can i get chinese char position use variable a ?
    -----------------------------------------------

    my description is wrong, i need "rich text" or "text area" or "multiline text", emm... how to achieve it

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    Comments

    • MoKaLuxMoKaLux Member
      I don't know if this could help? https://forum.gideros.rocks/discussion/comment/58993/#Comment_58993
      my growING GIDEROS github repositories: https://github.com/mokalux?tab=repositories
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    • luyimoonluyimoon Member
      MoKaLux said:

      I don't know if this could help? https://forum.gideros.rocks/discussion/comment/58993/#Comment_58993

      thanks but "getTextPositionFromPoint()" can not get chinese char position.
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    • MoKaLuxMoKaLux Member
      Accepted Answer
      did you add the harfbuzz plugin?
      my growING GIDEROS github repositories: https://github.com/mokalux?tab=repositories
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    • rrraptorrrraptor Member
      Like this?


      local px = Pixel.new(0xff0000, 1, 8, 8)
px:setAnchorPoint(0.5, 0.5)
stage:addChild(px)
 
local f = TTFont.new("simhei.ttf",40)
local str = "一二三四五一二三四五"
local tf = TextField.new(f,str)
tf:setPosition(100, 100)
stage:addChild(tf)
 
local len = utf8.len(str)
local b = tf:getTextPositionFromPoint(0, tf:getWidth()) / len
 
for i = 0, len do 
	Timer.delayedCall(i * 400, function()
		local x, y = tf:getPointFromTextPosition(i * b)
		px:setPosition(tf:getX() + x, tf:getY() + y)
	end)
end
      SuperShape | Nice blured shapes with shadows | Simple button pad | Simple layer class | Simple UI library | 2D camera lib | Color picker | FPS graph | Dear ImGui | cute_c2
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    • luyimoonluyimoon Member
      edited December 2021
      MoKaLux said:

      did you add the harfbuzz plugin?

      yes ,but i do not know how to use it...
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    • luyimoonluyimoon Member
      edited December 2021
      rrraptor said:

      Like this?


      local px = Pixel.new(0xff0000, 1, 8, 8)
px:setAnchorPoint(0.5, 0.5)
stage:addChild(px)
 
local f = TTFont.new("simhei.ttf",40)
local str = "一二三四五一二三四五"
local tf = TextField.new(f,str_1)
tf:setPosition(100, 100)
stage:addChild(tf)
 
local len = utf8.len(str)
local b = tf:getTextPositionFromPoint(0, tf:getWidth()) / len
 
for i = 0, len do 
	Timer.delayedCall(i * 400, function()
		local x, y = tf:getPointFromTextPosition(i * b)
		px:setPosition(tf:getX() + x, tf:getY() + y)
	end)
end
      emm....
      my mistake...
      i want get offset from mixed string.(like this "12取3a一sgواحدao上年")
      and use "utf8.sub()" get char or substring.
      like this
      -------------------------
      local f = TTFont.new("simhei.ttf",40)
      local str_1 = "123456"
      local tf = TextField.new(f,str)
      tf:setPosition(100, 100)
      stage:addChild(tf)

      local offset_1 = tf:getTextPositionFromPoint(tf:getWidth(),0)
      local char_1 = utf8.sub(str_1,offset_1,offset_1) -- but if "str_1" is mixed string, i cant get right offset.
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    • MoKaLuxMoKaLux Member
      luyimoon said:

      MoKaLux said:

      did you add the harfbuzz plugin?

      yes ,but i do not know how to use it...
      it is automatic, textfield and ttf will use it if present in the plugins :)
      my growING GIDEROS github repositories: https://github.com/mokalux?tab=repositories
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