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    ./demo/canvas-001.js ./demo/canvas-002.js ./demo/canvas-003.js ./demo/canvas-004.js ./demo/canvas-005.js ./demo/canvas-006.js ./demo/canvas-007.js ./demo/canvas-008.js ./demo/canvas-009.js ./demo/canvas-010.js ./demo/canvas-011.js ./demo/canvas-012.js ./demo/canvas-013.js ./demo/canvas-014.js ./demo/canvas-015.js ./demo/canvas-016.js ./demo/canvas-017.js ./demo/canvas-018.js ./demo/canvas-019.js ./demo/canvas-020.js ./demo/canvas-021.js ./demo/canvas-022.js ./demo/canvas-023.js ./demo/canvas-024.js ./demo/canvas-025.js ./demo/canvas-026.js ./demo/canvas-027.js ./demo/canvas-028.js ./demo/canvas-029.js ./demo/canvas-030.js ./demo/canvas-031.js ./demo/canvas-032.js ./demo/canvas-033.js ./demo/canvas-034.js ./demo/canvas-035.js ./demo/canvas-036.js ./demo/canvas-037.js ./demo/canvas-038.js ./demo/canvas-039.js ./demo/canvas-040.js ./demo/canvas-041.js ./demo/canvas-042.js ./demo/canvas-043.js ./demo/canvas-044.js ./demo/canvas-045.js ./demo/canvas-046.js ./demo/canvas-047.js ./demo/canvas-048.js ./demo/canvas-049.js ./demo/canvas-050.js ./demo/canvas-051.js ./demo/canvas-052.js ./demo/canvas-053.js ./demo/canvas-054.js ./demo/canvas-055.js ./demo/canvas-056.js ./demo/canvas-057.js ./demo/canvas-058.js ./demo/canvas-059.js ./demo/canvas-060.js ./demo/canvas-061.js ./demo/canvas-062.js ./demo/canvas-063.js ./demo/canvas-064.js ./demo/canvas-065.js ./demo/canvas-066.js ./demo/canvas-067.js ./demo/canvas-068.js ./demo/canvas-069.js ./demo/canvas-070.js ./demo/canvas-071.js ./demo/canvas-072.js ./demo/canvas-073.js ./demo/canvas-201.js ./demo/canvas-202.js ./demo/canvas-203.js ./demo/canvas-204.js ./demo/canvas-205.js ./demo/canvas-206.js ./demo/canvas-207.js ./demo/canvas-208.js ./demo/canvas-209.js ./demo/canvas-210.js ./demo/canvas-211.js ./demo/canvas-212.js ./demo/delaunator-001.js ./demo/delaunator-002.js ./demo/dom-001.js ./demo/dom-002.js ./demo/dom-003.js ./demo/dom-004.js ./demo/dom-005.js ./demo/dom-006.js ./demo/dom-007.js ./demo/dom-008.js ./demo/dom-009.js ./demo/dom-010.js ./demo/dom-011.js ./demo/dom-012.js ./demo/dom-013.js ./demo/dom-015.js ./demo/dom-016.js ./demo/dom-017.js ./demo/dom-018.js ./demo/dom-019.js ./demo/dom-020.js ./demo/dom-021.js ./demo/filters-001.js ./demo/filters-002.js ./demo/filters-003.js ./demo/filters-004.js ./demo/filters-005.js ./demo/filters-006.js ./demo/filters-007.js ./demo/filters-008.js ./demo/filters-009.js ./demo/filters-010.js ./demo/filters-011.js ./demo/filters-012.js ./demo/filters-013.js ./demo/filters-014.js ./demo/filters-015.js ./demo/filters-016.js ./demo/filters-017.js ./demo/filters-018.js ./demo/filters-019.js ./demo/filters-020.js ./demo/filters-021.js ./demo/filters-022.js ./demo/filters-023.js ./demo/filters-024.js ./demo/filters-025.js ./demo/filters-026.js ./demo/filters-027.js ./demo/filters-028.js ./demo/filters-029.js ./demo/filters-030.js ./demo/filters-031.js ./demo/filters-032.js ./demo/filters-033.js ./demo/filters-034.js ./demo/filters-035.js ./demo/filters-036.js ./demo/filters-037.js ./demo/filters-038.js ./demo/filters-039.js ./demo/filters-040.js ./demo/filters-041.js ./demo/filters-042.js ./demo/filters-101.js ./demo/filters-102.js ./demo/filters-103.js ./demo/filters-104.js ./demo/filters-105.js ./demo/filters-501.js ./demo/filters-502.js ./demo/filters-503.js ./demo/filters-504.js ./demo/filters-505.js ./demo/mediapipe-001.js ./demo/mediapipe-002.js ./demo/mediapipe-003.js ./demo/modules-001.js ./demo/modules-002.js ./demo/modules-003.js ./demo/modules-004.js ./demo/modules-005.js ./demo/modules-006.js ./demo/packets-001.js ./demo/packets-002.js ./demo/particles-001.js ./demo/particles-002.js ./demo/particles-003.js ./demo/particles-004.js ./demo/particles-005.js ./demo/particles-006.js ./demo/particles-007.js ./demo/particles-008.js ./demo/particles-009.js ./demo/particles-010.js ./demo/particles-011.js ./demo/particles-012.js ./demo/particles-013.js ./demo/particles-014.js ./demo/particles-015.js ./demo/particles-016.js ./demo/particles-017.js ./demo/snippets-001.js ./demo/snippets-002.js ./demo/snippets-003.js ./demo/snippets-004.js ./demo/snippets-005.js ./demo/snippets-006.js ./demo/temp-001.js ./demo/temp-shape-scale-investigation.js ./demo/tensorflow-001.js ./demo/tensorflow-002.js ./demo/utilities.js
  • §

    Demo Canvas 203

    Label entity - underline text

  • §

    Run code

    import * as scrawl from '../source/scrawl.js';
    
    import { reportSpeed } from './utilities.js';
  • §

    Scene setup

    Get a handle to the Canvas wrapper

    const canvas = scrawl.findCanvas('mycanvas');
  • §

    Namespacing boilerplate

    const namespace = canvas.name;
    const name = (n) => `${namespace}-${n}`;
    
    
    scrawl.makeGradient({
        name: name('linear-gradient'),
        endX: '100%',
    
        colors: [
            [0, 'blue'],
            [495, 'red'],
            [500, 'yellow'],
            [505, 'red'],
            [999, 'green']
        ],
        colorSpace: 'OKLAB',
        precision: 5,
    });
    
    scrawl.makePattern({
    
        name: name('water-pattern'),
        imageSource: 'img/water.png',
    });
    
    const mylabel = scrawl.makeLabel({
        name: name('my-label'),
        start: ['center', 'center'],
        handle: ['center', 'center'],
        fontString: '60px serif',
        text: 'Long live the world!',
    
        includeUnderline: true,
        underlineWidth: 2,
        underlineOffset: 0.9,
        underlineGap: 3,
        lockFillStyleToEntity: true,
    });
  • §

    Scene animation

    Function to display frames-per-second data, and other information relevant to the demo

    const report = reportSpeed('#reportmessage', function () {
    
        let fontReadout = `
    `;
        document.fonts.forEach(k => {
            if (k.status === 'loaded') fontReadout +=(`    ${k.family} ${k.weight} ${k.style}\n`)
        })
    
        const position = `
        start - x: ${mylabel.get('startX')}px, y: ${mylabel.get('startY')}px
        handle - x: ${mylabel.get('handleX')}px, y: ${mylabel.get('handleY')}px
        offset - x: ${mylabel.get('offsetX')}px, y: ${mylabel.get('offsetY')}px
        scale: ${mylabel.get('scale')}, roll: ${mylabel.get('roll')}°
    `;
    
        return `
    Position:${position}
    Loaded fonts:${fontReadout}`
    });
  • §

    Create the Display cycle animation

    scrawl.makeRender({
    
        name: name('animation'),
        target: canvas,
        afterShow: report,
    });
  • §

    User interaction

    Gather DOM elements; setup form

    const dom = scrawl.initializeDomInputs([
        ['input', 'handleX', '50'],
        ['input', 'handleY', '50'],
        ['input', 'letterSpacing', '0'],
        ['input', 'roll', '0'],
        ['input', 'scale', '1'],
        ['input', 'startX', '50'],
        ['input', 'startY', '50'],
        ['input', 'underlineGap', '3'],
        ['input', 'underlineOffset', '0.9'],
        ['input', 'underlineWidth', '2'],
        ['input', 'wordSpacing', '0'],
        ['select', 'font', 0],
        ['select', 'handleX_string', 2],
        ['select', 'handleY_string', 3],
        ['select', 'includeUnderline', 1],
        ['select', 'reverse', 0],
        ['select', 'underlineStyle', 0],
        ['select', 'upend', 0],
    ]);
    
    
    scrawl.makeUpdater({
    
        event: ['input', 'change'],
        origin: '.controlItem',
    
        target: mylabel,
    
        useNativeListener: true,
        preventDefault: true,
    
        updates: {
    
            startX: ['startX', '%'],
            startY: ['startY', '%'],
            handleX: ['handleX', '%'],
            handleY: ['handleY', '%'],
            handleX_string: ['handleX', 'raw'],
            handleY_string: ['handleY', 'raw'],
    
            roll: ['roll', 'float'],
            scale: ['scale', 'float'],
    
            upend: ['flipUpend', 'boolean'],
            reverse: ['flipReverse', 'boolean'],
    
            wordSpacing: ['wordSpacing', 'px'],
            letterSpacing: ['letterSpacing', 'px'],
    
            includeUnderline: ['includeUnderline', 'boolean'],
            underlineStyle: ['underlineStyle', 'raw'],
            underlineWidth: ['underlineWidth', 'int'],
            underlineOffset: ['underlineOffset', 'float'],
            underlineGap: ['underlineGap', 'float'],
        },
    });
    
    const updateFont = (event) => {
    
        const font = event.target.value;
    
        if (font) {
    
            switch (font) {
    
                case 'serif' :
                    mylabel.set({
                        fontString: '60px serif',
                        text: 'Long live the world!',
                        direction: 'ltr',
                    });
                    break;
    
                case 'sans-serif' :
                    mylabel.set({
                        fontString: '60px sans-serif',
                        text: 'Long live the world!',
                        direction: 'ltr',
                    });
                    break;
    
                case 'monospace' :
                    mylabel.set({
                        fontString: '40px monospace',
                        text: 'Long live the world!',
                        direction: 'ltr',
                    });
                    break;
    
                case 'cursive' :
                    mylabel.set({
                        fontString: '60px cursive',
                        text: 'Long live the world!',
                        direction: 'ltr',
                    });
                    break;
    
                case 'fantasy' :
                    mylabel.set({
                        fontString: '60px fantasy',
                        text: 'Long live the world!',
                        direction: 'ltr',
                    });
                    break;
    
                case 'garamond' :
                    mylabel.set({
                        fontString: '60px Garamond',
                        text: 'Long live the world!',
                        direction: 'ltr',
                    });
                    break;
    
                case 'garamond-bold' :
                    mylabel.set({
                        fontString: 'bold 60px Garamond',
                        text: 'Long live the world!',
                        direction: 'ltr',
                    });
                    break;
    
                case 'garamond-italic' :
                    mylabel.set({
                        fontString: 'italic 60px Garamond',
                        text: 'Long live the world!',
                        direction: 'ltr',
                    });
                    break;
    
                case 'garamond-bolditalic' :
                    mylabel.set({
                        fontString: 'bold italic 60px Garamond',
                        text: 'Long live the world!',
                        direction: 'ltr',
                    });
                    break;
    
                case 'roboto' :
                    mylabel.set({
                        fontString: '60px "Roboto Sans"',
                        text: 'Long live the world!',
                        direction: 'ltr',
                    });
                    break;
    
                case 'roboto-bold' :
                    mylabel.set({
                        fontString: 'bold 60px "Roboto Sans"',
                        text: 'Long live the world!',
                        direction: 'ltr',
                    });
                    break;
    
                case 'roboto-italic' :
                    mylabel.set({
                        fontString: 'italic 60px "Roboto Sans"',
                        text: 'Long live the world!',
                        direction: 'ltr',
                    });
                    break;
    
                case 'roboto-bolditalic' :
                    mylabel.set({
                        fontString: 'bold italic 60px "Roboto Sans"',
                        text: 'Long live the world!',
                        direction: 'ltr',
                    });
                    break;
    
                case 'roboto-serif' :
                    mylabel.set({
                        fontString: '50px "Roboto Serif"',
                        text: 'Long live the world!',
                        direction: 'ltr',
                    });
                    break;
    
                case 'roboto-serif-bold' :
                    mylabel.set({
                        fontString: 'bold 50px "Roboto Serif"',
                        text: 'Long live the world!',
                        direction: 'ltr',
                    });
                    break;
    
                case 'roboto-serif-italic' :
                    mylabel.set({
                        fontString: 'italic 50px "Roboto Serif"',
                        text: 'Long live the world!',
                        direction: 'ltr',
                    });
                    break;
    
                case 'roboto-serif-bolditalic' :
                    mylabel.set({
                        fontString: 'bold italic 50px "Roboto Serif"',
                        text: 'Long live the world!',
                        direction: 'ltr',
                    });
                    break;
    
                case 'roboto-mono' :
                    mylabel.set({
                        fontString: '45px "Roboto Mono"',
                        text: 'Long live the world!',
                        direction: 'ltr',
                    });
                    break;
    
                case 'roboto-mono-bold' :
                    mylabel.set({
                        fontString: 'bold 45px "Roboto Mono"',
                        text: 'Long live the world!',
                        direction: 'ltr',
                    });
                    break;
    
                case 'roboto-mono-italic' :
                    mylabel.set({
                        fontString: 'italic 45px "Roboto Mono"',
                        text: 'Long live the world!',
                        direction: 'ltr',
                    });
                    break;
    
                case 'roboto-mono-bolditalic' :
                    mylabel.set({
                        fontString: 'bold italic 45px "Roboto Mono"',
                        text: 'Long live the world!',
                        direction: 'ltr',
                    });
                    break;
    
                case 'noto-arabic-sans' :
                    mylabel.set({
                        fontString: '50px "Noto Arabic Sans"',
                        text: 'لا يعرض أحد لتدخل تعسفي',
                        direction: 'rtl',
                    });
                    break;
    
                case 'noto-arabic-naskh' :
                    mylabel.set({
                        fontString: '50px "Noto Arabic Naskh"',
                        text: 'لا يعرض أحد لتدخل تعسفي',
                        direction: 'rtl',
                    });
                    break;
    
                case 'noto-urdu-nastaliq' :
                    mylabel.set({
                        fontString: '50px "Noto Urdu Nastaliq"',
                        text: 'ہر انسان کو آزادیٔ فکر،',
                        direction: 'rtl',
                    });
                    break;
    
                case 'noto-chinese-simple-sans' :
                    mylabel.set({
                        fontString: '50px "Noto Chinese Simple Sans"',
                        text: '鉴于对人类家庭所有',
                        direction: 'ltr',
                    });
                    break;
    
                case 'noto-chinese-simple-serif' :
                    mylabel.set({
                        fontString: '50px "Noto Chinese Simple Serif"',
                        text: '鉴于对人类家庭所有',
                        direction: 'ltr',
                    });
                    break;
    
                case 'noto-devangari-sans' :
                    mylabel.set({
                        fontString: '50px "Noto Devangari Sans"',
                        text: 'प्रत्येक व्यक्ति को विचार और',
                        direction: 'ltr',
                    });
                    break;
    
                case 'noto-devangari-serif' :
                    mylabel.set({
                        fontString: '50px "Noto Devangari Serif"',
                        text: 'प्रत्येक व्यक्ति को विचार और',
                        direction: 'ltr',
                    });
                    break;
    
                case 'noto-hebrew-sans' :
                    mylabel.set({
                        fontString: '50px "Noto Hebrew Sans"',
                        text: 'כל אדם זכאי לחירות',
                        direction: 'rtl',
                    });
                    break;
    
                case 'noto-hebrew-serif' :
                    mylabel.set({
                        fontString: '50px "Noto Hebrew Serif"',
                        text: 'כל אדם זכאי לחירות',
                        direction: 'rtl',
                    });
                    break;
    
                case 'noto-japanese-sans' :
                    mylabel.set({
                        fontString: '50px "Noto Japanese Sans"',
                        text: '人類社会のすべて',
                        direction: 'ltr',
                    });
                    break;
    
                case 'noto-japanese-serif' :
                    mylabel.set({
                        fontString: '50px "Noto Japanese Serif"',
                        text: '人類社会のすべて',
                        direction: 'ltr',
                    });
                    break;
    
                case 'noto-korean-sans' :
                    mylabel.set({
                        fontString: '50px "Noto Korean Sans"',
                        text: '모든 사람은 의견의',
                        direction: 'ltr',
                    });
                    break;
    
                case 'noto-korean-serif' :
                    mylabel.set({
                        fontString: '50px "Noto Korean Serif"',
                        text: '모든 사람은 의견의',
                        direction: 'ltr',
                    });
                    break;
    
                case 'noto-mongolian-sans' :
                    mylabel.set({
                        fontString: '50px "Noto Mongolian Sans"',
                        text: 'ᠬᠦᠮᠦᠨ ᠪᠦᠷ ᠲᠥᠷᠥᠵᠦ',
                        direction: 'ltr',
                    });
                    break;
    
                case 'noto-tai-le-sans' :
                    mylabel.set({
                        fontString: '50px "Noto Tai Le Sans"',
                        text: 'ᥓᥣᥳ ᥞᥨᥛ ᥑᥤᥴ',
                        direction: 'ltr',
                    });
                    break;
    
                case 'noto-tai-tham-sans' :
                    mylabel.set({
                        fontString: '50px "Noto Tai Tham Sans"',
                        text: 'ᨾᨶᩩᩔ᩼ᨴ᩠ᨦᩢᩉᩖᩣ᩠ᨿᨠᩮ᩠ᨯᩨᨾᩣᨾᩦ',
                        direction: 'ltr',
                    });
                    break;
    
                case 'noto-thai-sans' :
                    mylabel.set({
                        fontString: '50px "Noto Thai Sans"',
                        text: 'โดยที่การยอมรับศักดิ์ศ',
                        direction: 'ltr',
                    });
                    break;
    
                case 'noto-thai-serif' :
                    mylabel.set({
                        fontString: '50px "Noto Thai Serif"',
                        text: 'โดยที่การยอมรับศักดิ์ศ',
                        direction: 'ltr',
                    });
                    break;
    
                case 'noto-tirhuta-sans' :
                    mylabel.set({
                        fontString: '50px "Noto Tirhuta Sans"',
                        text: '𑒮𑒩𑓂𑒫𑒹 𑒧𑒰𑒢𑒫𑒰𑓁 𑒮𑓂𑒫𑒞𑒢𑓂𑒞𑓂𑒩𑒰𑓁',
                        direction: 'ltr',
                    });
                    break;
    
                case 'bungee' :
                    mylabel.set({
                        fontString: '60px "Bungee"',
                        text: 'Long live the world!',
                        direction: 'ltr',
                    });
                    break;
    
                case 'bungee-spice' :
                    mylabel.set({
                        fontString: '60px "Bungee Spice"',
                        text: 'Long live the world!',
                        direction: 'ltr',
                    });
                    break;
    
                case 'carter-one' :
                    mylabel.set({
                        fontString: '60px "Carter One"',
                        text: 'Long live the world!',
                        direction: 'ltr',
                    });
                    break;
    
                case 'mountains-of-christmas' :
                    mylabel.set({
                        fontString: '60px "Mountains Of Christmas"',
                        text: 'Long live the world!',
                        direction: 'ltr',
                    });
                    break;
    
                default:
                    mylabel.set({
                        fontString: '80px serif',
                        text: 'Long live the world!',
                        direction: 'ltr',
                    });
            }
        }
    };
    
    scrawl.addNativeListener('change', (e) => updateFont(e), dom.font);
  • §

    Development and testing

    console.log(scrawl.library);