BeeBotix-School/whiteboard.html at main · BeeBotix/BeeBotix-School · GitHub

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<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8" />
  <meta name="viewport" content="width=device-width, initial-scale=1" />
  <title>Beebotix School Whiteboard</title>
  <link href="https://fonts.googleapis.com/css2?family=DotGothic16&display=swap" rel="stylesheet">
  <style>
    :root{
      --primary: #ffbd59;
      --dark: #474747;
      --light: #ededed;
      --white: #ffffff;
    }
    html, body {
      height: 100%;
      margin: 0;
      background: var(--light);
      font-family: 'DotGothic16', sans-serif;
    }
    .board-wrap{
      position: fixed;
      inset: 0;
      display: grid;
      grid-template-rows: 1fr auto;
      background: var(--light);
    }
    #board{
      display: block;
      width: 100%;
      height: 100%;
      background: var(--white);
      touch-action: none;
      cursor: crosshair;
    }

    .toolbar{
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      gap: .75rem;
      padding: .6rem .8rem;
      background: var(--dark);
      color: var(--white);
      border-top: 2px solid var(--primary);
    }
    .tool-group{ display:flex; align-items:center; gap:.5rem; }

    .chip{
      padding:.5rem .75rem; border-radius: 8px;
      background: var(--light); color: var(--dark);
      border: none; cursor:pointer;
      font-family: 'DotGothic16', sans-serif;
      transition: background .2s ease;
    }
    .chip:hover{ background: var(--primary); color: var(--dark); }
    .chip[aria-pressed="true"]{ background: var(--primary); color: var(--dark); }

    .swatch{
      width: 28px; height: 28px; border-radius: 6px;
      border:1px solid var(--dark); cursor:pointer;
    }
    .swatch[aria-current="true"]{ outline: 3px solid var(--primary); outline-offset: 2px; }

    .slider{ accent-color: var(--primary); }

    .watermark{
      position: absolute; right: 16px; bottom: 80px;
      font-family: 'DotGothic16', sans-serif;
      font-size: 20px; font-weight: bold;
      user-select: none; pointer-events: none;
    }
    .watermark .bee{ color: var(--primary); }
    .watermark .rest{ color: var(--dark); }

    @media (max-width: 640px){
      .toolbar{ gap:.5rem; justify-content:center; }
      .label{ display:none; }
    }
  </style>
</head>
<body>
  <div class="board-wrap">
    <canvas id="board"></canvas>
    <div class="toolbar" role="toolbar" aria-label="Whiteboard tools">
      <div class="tool-group" id="modeGroup">
        <button class="chip" id="penBtn" aria-pressed="true" title="Pen (P)">✏️ <span class="label">Pen</span></button>
        <button class="chip" id="eraserBtn" aria-pressed="false" title="Eraser (E)">🧽 <span class="label">Eraser</span></button>
      </div>
      <div class="tool-group" id="colorGroup" aria-label="Colors">
        <span class="swatch" data-color="#474747" style="background:#474747"></span>
        <span class="swatch" data-color="#000000" style="background:#000000"></span>
        <span class="swatch" data-color="#ffbd59" style="background:#ffbd59"></span>
        <span class="swatch" data-color="#ffffff" style="background:#ffffff"></span>
        <input id="colorPicker" type="color" value="#474747" title="Custom color" style="width:32px;height:32px;border:none;background:transparent;cursor:pointer"/>
      </div>
      <div class="tool-group" id="sizeGroup">
        <span class="label">Size:</span>
        <input id="size" class="slider" type="range" min="1" max="40" value="6" />
        <span id="sizeVal">6px</span>
      </div>
      <div style="margin-left:auto;opacity:.7;" class="label">P = Pen, E = Eraser, D = Download, C = Clear</div>
      <div class="tool-group">
        <button class="chip" id="clearBtn" title="Clear (C)">🗑️</button>
        <button class="chip" id="downloadBtn" title="Download PNG (D)">⬇️</button>
      </div>
    </div>
  </div>
  <div class="watermark"><span class="bee">Bee</span><span class="rest">botix School</span></div>

  <script>
    (function(){
      const canvas = document.getElementById('board');
      const ctx = canvas.getContext('2d');

      const penBtn = document.getElementById('penBtn');
      const eraserBtn = document.getElementById('eraserBtn');
      const colorPicker = document.getElementById('colorPicker');
      const size = document.getElementById('size');
      const sizeVal = document.getElementById('sizeVal');
      const clearBtn = document.getElementById('clearBtn');
      const downloadBtn = document.getElementById('downloadBtn');
      const swatches = Array.from(document.querySelectorAll('.swatch'));

      let drawing = false;
      let lastX = 0, lastY = 0;
      let mode = 'pen';
      let strokeColor = colorPicker.value;
      let strokeSize = parseInt(size.value, 10);

      function resizeCanvas(){
        const dpr = window.devicePixelRatio || 1;
        canvas.width = canvas.clientWidth * dpr;
        canvas.height = canvas.clientHeight * dpr;
        ctx.setTransform(dpr,0,0,dpr,0,0);
        ctx.lineCap = 'round';
        ctx.lineJoin = 'round';
      }
      window.addEventListener('resize', resizeCanvas);
      resizeCanvas();

      function setMode(next){
        mode = next;
        penBtn.setAttribute('aria-pressed', String(mode==='pen'));
        eraserBtn.setAttribute('aria-pressed', String(mode==='eraser'));
      }

      function startDraw(x, y){ drawing = true; [lastX, lastY] = [x,y]; ctx.beginPath(); ctx.moveTo(x,y);}
      function drawTo(x, y){
        if(!drawing) return;
        ctx.lineWidth = strokeSize;
        if(mode==='eraser'){
          ctx.globalCompositeOperation='destination-out';
          ctx.strokeStyle='rgba(0,0,0,1)';
        } else {
          ctx.globalCompositeOperation='source-over';
          ctx.strokeStyle=strokeColor;
        }
        ctx.lineTo(x,y);
        ctx.stroke();
        [lastX,lastY]=[x,y];
      }
      function endDraw(){drawing=false; ctx.closePath();}

      function getPos(evt){
        const rect = canvas.getBoundingClientRect();
        if(evt.touches&&evt.touches[0]){
          return {x:evt.touches[0].clientX-rect.left,y:evt.touches[0].clientY-rect.top};
        }
        return {x:evt.clientX-rect.left,y:evt.clientY-rect.top};
      }

      canvas.addEventListener('mousedown', e=>{const p=getPos(e);startDraw(p.x,p.y);});
      window.addEventListener('mousemove', e=>{const p=getPos(e);drawTo(p.x,p.y);});
      window.addEventListener('mouseup', endDraw);
      canvas.addEventListener('touchstart', e=>{e.preventDefault();const p=getPos(e);startDraw(p.x,p.y);},{passive:false});
      canvas.addEventListener('touchmove', e=>{e.preventDefault();const p=getPos(e);drawTo(p.x,p.y);},{passive:false});
      canvas.addEventListener('touchend', e=>{e.preventDefault();endDraw();},{passive:false});

      penBtn.addEventListener('click', ()=>setMode('pen'));
      eraserBtn.addEventListener('click', ()=>setMode('eraser'));

      size.addEventListener('input', ()=>{strokeSize=parseInt(size.value,10); sizeVal.textContent=strokeSize+'px';});
      colorPicker.addEventListener('input', ()=>{strokeColor=colorPicker.value; markCurrentSwatch(strokeColor);});

      function markCurrentSwatch(color){
        swatches.forEach(s=>s.setAttribute('aria-current','false'));
        const found=swatches.find(s=>s.dataset.color.toLowerCase()===color.toLowerCase());
        if(found) found.setAttribute('aria-current','true');
      }
      swatches.forEach(s=>s.addEventListener('click',()=>{strokeColor=s.dataset.color;colorPicker.value=strokeColor;markCurrentSwatch(strokeColor);setMode('pen');}));
      markCurrentSwatch(strokeColor);

      clearBtn.addEventListener('click', ()=>ctx.clearRect(0,0,canvas.width,canvas.height));
      downloadBtn.addEventListener('click', ()=>{const link=document.createElement('a');link.download='beebotix-whiteboard.png';link.href=canvas.toDataURL('image/png');link.click();});

      window.addEventListener('keydown', e=>{
        if(e.key.toLowerCase()==='e') setMode('eraser');
        if(e.key.toLowerCase()==='p') setMode('pen');
        if(e.key.toLowerCase()==='c') ctx.clearRect(0,0,canvas.width,canvas.height);
        if(e.key.toLowerCase()==='d'){const link=document.createElement('a');link.download='beebotix-whiteboard.png';link.href=canvas.toDataURL('image/png');link.click();}
      });
    })();
  </script>
</body>
</html>