Drawing and Data Visualization

Garden Growth Donut Chart

Create a donut chart for a garden-growth scenario: includes real content, interactive controls, clear state feedback, and responsive layout across sizes.

Drawing and Data VisualizationDonut chartHTMLCanvasJavaScript
With JavaScript enabled, you can edit, run, and save this example. The fixed source is as follows:
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  <title>Garden Growth Donut Chart</title>
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<body data-aesthetic="monochrome" data-composition="studio">
  <main class="page">
    <header class="mast"><div><span class="eyebrow">monochrome / Donut Chart / BEGINNER</span><h1>Garden Growth Donut Chart</h1><p class="intro">Create a donut chart for a garden-growth scenario: includes real content, interactive controls, clear state feedback, and responsive layout across sizes.</p></div><span class="scenario">Garden Growth</span></header>
    <div class="composition-studio"><div class="studio-ruler" aria-hidden="true"></div><section class="demo" aria-label="Garden Growth Donut Chart Interactive Area"><div class="workflow-compare"><form id="workflowCompareControls" class="compare-controls"><fieldset><legend>Reference Channel</legend><label><input type="radio" name="workflowChannel" value="A" checked>A · Sunflower Garden</label><label><input type="radio" name="workflowChannel" value="B">B · Partial Shade Flower Bed</label></fieldset><label>Stem Height Target Weight<input id="workflowCompareWeight" type="range" min="10" max="90" value="50"><output id="workflowCompareWeightValue">50 cm</output></label><label><input id="workflowCompareFreeze" type="checkbox">Freeze current version</label><button id="workflowCompareCapture" class="action primary" type="button">Sample and save observations</button><ol id="workflowCompareShelf" aria-label="Version Sampling Record"></ol></form><section class="compare-stage"><header><span class="eyebrow">Garden Growth COMPARE</span><h2>Growth comparison dual-version comparison</h2><output id="workflowCompareLive">Version A waiting for sampling</output></header><section id="workflowCore" class="workflow-core compare-core" data-compare-channel="A" style="--compare-split:50%"><!-- 11DZ_CORE_START:drawing-data-viz-donut-chart --><div class="drawing-pattern drawing-pattern-2"><div class="canvas-shell"><canvas id="artboard" width="900" height="440" aria-label="Donut Chart Canvas" aria-describedby="canvasDescription"></canvas><div class="canvas-tools panel"><span class="eyebrow">CANVAS MODE 3</span><h2>Donut chart</h2><label>Complexity <input id="canvasAmount" type="range" min="4" max="28" value="16"></label><button id="redrawCanvas" class="action primary" type="button">Redraw</button><p id="canvasDescription" class="muted">On a dark canvas, create a donut chart using two high-contrast colors; a complexity slider determines the number of shapes, and everything is generated locally in the browser.</p></div></div><form id="donutAllocationForm" class="drawing-controller donut-controller"><header><span class="eyebrow">RATIO WORKBENCH</span><h3>Garden Growth Allocation</h3></header><div class="donut-fields"><label>Core<input data-donut-share type="number" min="0" max="100" value="45"></label><label>Supported<input data-donut-share type="number" min="0" max="100" value="35"></label><label>Other<input data-donut-share type="number" min="0" max="100" value="20"></label></div><label>Inner Ring Size<input id="donutHole" type="range" min="25" max="75" value="52" data-core-bridge="drawing-data-viz-donut-chart"></label><button class="action" type="submit">Balanced proportions</button><output id="donutAllocationTotal">Total 100%</output></form></div><!-- 11DZ_CORE_END --></section></section></div><p id="status" class="status" role="status" aria-live="polite"></p></section></div>
  </main>
  <script>
    'use strict';
    const statusOutput = document.querySelector('#status');
    const announce = message => { statusOutput.textContent = message; };
    /* 11DZ_CORE_SCRIPT_START:drawing-data-viz-donut-chart */
const canvas = document.querySelector('#artboard'); const context = canvas.getContext('2d'); const amount = document.querySelector('#canvasAmount'); let drawSeed = 1866868146;
    function random(){ drawSeed = (drawSeed * 1664525 + 1013904223) >>> 0; return drawSeed / 4294967296; }
    function drawCanvas(){ const rect = canvas.getBoundingClientRect(); const ratio = Math.min(2,window.devicePixelRatio || 1); canvas.width = Math.max(320,Math.round(rect.width * ratio)); canvas.height = Math.max(240,Math.round(rect.height * ratio)); context.setTransform(ratio,0,0,ratio,0,0); const width = rect.width; const height = rect.height; context.clearRect(0,0,width,height); context.fillStyle = '#102c44'; context.fillRect(0,0,width,height); const drawingFactor=Number(canvas.dataset.drawingFactor||1); const count=Math.max(1,Math.round(Number(amount.value)*drawingFactor)); drawSeed += 1+Number(canvas.dataset.drawingShift||0); context.globalCompositeOperation=canvas.dataset.drawingBlend||'source-over';
      for(let index=0; index<count; index+=1){ const x=random()*width; const y=random()*height; const size=(10+random()*70)*Math.max(.45,drawingFactor); context.beginPath(); context.strokeStyle=index%2?'#e05263':'#79b7c7'; context.fillStyle=context.strokeStyle+'88'; context.lineWidth=(2+random()*4)*Math.max(.6,drawingFactor);
        context.arc(width/2,height/2,35+index*4,index*.31,index*.31+.24); context.lineWidth=12; context.stroke();
      } context.globalCompositeOperation='source-over'; announce('Canvas generated ' + count + ' graphic elements'); }
    document.querySelector('#redrawCanvas').addEventListener('click',drawCanvas); amount.addEventListener('input',drawCanvas); addEventListener('resize',drawCanvas,{passive:true}); drawCanvas();
const donutShares=[...document.querySelectorAll('[data-donut-share]')];const donutHole=document.querySelector('#donutHole');let donutAllocation=donutShares.map(input=>Number(input.value));function renderDonutAllocation(){donutAllocation=donutShares.map(input=>Math.max(0,Number(input.value)||0));const total=donutAllocation.reduce((sum,value)=>sum+value,0);const hole=Number(donutHole.value);document.querySelector('#donutAllocationTotal').textContent='Total '+total+'% · Inner ring '+hole+'%';canvas.dataset.drawingFactor=String(.6+total/220);canvas.dataset.drawingShift=String(hole);canvas.dataset.drawingBlend=total===100?'screen':'source-over';drawCanvas();}donutShares.forEach(input=>input.addEventListener('input',renderDonutAllocation));donutHole.addEventListener('input',renderDonutAllocation);document.querySelector('#donutAllocationForm').addEventListener('submit',event=>{event.preventDefault();const equal=Math.floor(100/donutShares.length);donutShares.forEach((input,index)=>{input.value=String(index===donutShares.length-1?100-equal*(donutShares.length-1):equal);});renderDonutAllocation();announce('Donut chart proportions have been balanced to one hundred percent');});renderDonutAllocation();
/* 11DZ_CORE_SCRIPT_END */
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const workflowCompareCore=document.querySelector('#workflowCore');const workflowCompareWeight=document.querySelector('#workflowCompareWeight');const workflowCompareState={channel:'A',weight:50,frozen:false,snapshots:[]};function workflowCompareFingerprint(){const controls=[...workflowCompareCore.querySelectorAll('input,select,textarea')];const outputs=[...workflowCompareCore.querySelectorAll('output,[role="status"],strong')].map(node=>node.textContent.trim()).filter(Boolean);return {controlValues:controls.map(control=>control.type==='checkbox'||control.type==='radio'?control.checked:control.value),summary:outputs.slice(0,4).join(' / '),nodes:workflowCompareCore.querySelectorAll('*').length};}function workflowCompareDrive(){workflowCompareCore.dataset.compareChannel=workflowCompareState.channel;workflowCompareCore.style.setProperty('--compare-split',workflowCompareState.weight+'%');document.querySelector('#workflowCompareWeightValue').textContent=workflowCompareState.weight+' centimeters';document.querySelector('#workflowCompareLive').textContent=workflowCompareState.channel+' Version · '+workflowCompareState.weight+' centimeters'+(workflowCompareState.frozen?' · Frozen':'');announce('Growth comparison view in progress '+workflowCompareState.channel+' Version');}function workflowCompareCapture(source){const bridge=workflowBridgeActivate();const snapshot={...workflowCompareFingerprint(),channel:workflowCompareState.channel,weight:workflowCompareState.weight,source,bridge:bridge.summary};workflowCompareState.snapshots.push(snapshot);const item=document.createElement('li');item.innerHTML='<b>'+snapshot.channel+'</b><span>'+(snapshot.summary||snapshot.bridge)+'</span><small>'+snapshot.weight+' cm · '+snapshot.bridge+'</small>';document.querySelector('#workflowCompareShelf').prepend(item);announce('sampled '+snapshot.channel+' Version and save observation · '+bridge.summary);}document.querySelectorAll('[name="workflowChannel"]').forEach(input=>input.addEventListener('change',()=>{workflowCompareState.channel=input.value;workflowCompareDrive();}));workflowCompareWeight.addEventListener('input',()=>{workflowCompareState.weight=Number(workflowCompareWeight.value);workflowCompareDrive();});document.querySelector('#workflowCompareFreeze').addEventListener('change',event=>{workflowCompareState.frozen=event.currentTarget.checked;workflowCompareDrive();});document.querySelector('#workflowCompareCapture').addEventListener('click',()=>workflowCompareCapture('Button Sampling'));workflowCompareCore.addEventListener('dblclick',()=>workflowCompareCapture('Main view double-click'));workflowCompareDrive();
workflowBridgeReset();
  </script>
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