Word wrap

Uses natiny.font.measure_wrapped and natiny.render.text_box to keep the panel and wrapped text at the same size. Move the mouse horizontally to change the wrap width.


    


    

        

            main.lua
            

                
            

        

        

            
local natiny = require("natiny")

natiny.backend.init()

local win = natiny.window.create("Word wrap", 900, 600)
natiny.window.set_scale_mode(win, natiny.window.SCALE_MODE_STRETCH)

local font = natiny.font.create(natiny.resource.load("common/fonts/roboto.ttf"), 22)

local TEXT = "Word wrapping is measured by the same code that draws it, " ..
             "so a panel sized with measure_wrapped is guaranteed to contain " ..
             "what text_box puts inside it. Move the mouse."

local BG = natiny.color.from_hex("#151E2C")
local OBJECT = natiny.color.from_hex("#A9B3C5")
local ACCENT = natiny.color.from_hex("#F8F9FD")
local LIGHT_TEXT = natiny.color.from_hex("#F3F5FA")
local DARK_TEXT = natiny.color.from_hex("#111827")
local X, Y = 120, 160

natiny.backend.loop(function(dt)
    natiny.window.bind(win, function()
        local width = math.max(90, math.min(660, natiny.input.get_mouse_x() - X))
        local w, h, lines = natiny.font.measure_wrapped(font, TEXT, width)

        natiny.render.clear(BG)

        natiny.render.set_color(OBJECT)
        natiny.render.rectangle(X - 16, Y - 16, width + 32, h + 32)
        natiny.render.set_color(ACCENT)
        natiny.render.rectangle_outline(X - 16, Y - 16, width + 32, h + 32, 3)

        natiny.render.set_color(ACCENT)
        natiny.render.line(X + width, Y - 40, X + width, Y + h + 40, 1)

        natiny.render.set_color(DARK_TEXT)
        natiny.render.text_box(font, X, Y, width, h, TEXT)

        natiny.render.set_color(LIGHT_TEXT)
        natiny.render.text(font, X - 16, 80, string.format(
            "wrap at %d  ->  %d lines, widest %.0f, %.0f tall", width, lines, w, h))
    end)
end)

natiny.backend.shutdown()