Air Quality Dashboard Graphic
Complete the dashboard chart in an air-quality scenario: includes real content, actionable controls, clear state feedback, and responsive layouts across sizes.
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<header class="mast"><div><span class="eyebrow">magazine / dashboard graphics / BEGINNER</span><h1>Air Quality Dashboard Graphic</h1><p class="intro">Complete the dashboard chart in an air-quality scenario: includes real content, actionable controls, clear state feedback, and responsive layouts across sizes.</p></div><span class="scenario">Air Quality</span></header>
<div class="composition-studio"><div class="studio-ruler" aria-hidden="true"></div><section class="demo" aria-label="Air quality dashboard interactive area"><div class="workflow-dispatch"><aside class="dispatch-console"><span class="eyebrow">Air Quality DISPATCH</span><h2>Air Station Control Desk</h2><form id="workflowDispatchForm"><label>Task Type<select id="workflowDispatchKind"><option>Roadside Station</option><option>Park Station</option><option>Community Station</option></select></label><label>AQI threshold<input id="workflowDispatchAmount" type="number" min="1" max="9999" value="27"><span>AQI</span></label><fieldset><legend>Processing priority</legend><label><input type="radio" name="workflowPriority" value="normal" checked>Regular</label><label><input type="radio" name="workflowPriority" value="urgent">Urgent</label></fieldset><button class="action primary" type="submit">Start monitoring</button></form><label>Current task<select id="workflowDispatchActive" aria-label="Switch current task"><option value="1">Roadside Station</option><option value="2">Park Station</option></select></label><output id="workflowDispatchSummary">Waiting for Dispatch</output></aside><section id="workflowCore" class="workflow-core dispatch-workbench" data-dispatch-priority="normal"><!-- 11DZ_CORE_START:drawing-data-viz-gauge-meter --><div class="drawing-pattern drawing-pattern-3"><div class="canvas-shell"><canvas id="artboard" width="900" height="440" aria-label="Dashboard graphic canvas" aria-describedby="canvasDescription"></canvas><div class="canvas-tools panel"><span class="eyebrow">CANVAS MODE 4</span><h2>Dashboard charts</h2><label>Complexity <input id="canvasAmount" type="range" min="4" max="28" value="19"></label><button id="redrawCanvas" class="action primary" type="button">Redraw</button><p id="canvasDescription" class="muted">On a dark canvas, chart graphics are drawn in two high-contrast colors, with the number of shapes determined by the complexity slider; everything is generated locally in the browser.</p></div></div><section class="drawing-controller gauge-controller"><header><span class="eyebrow">TARGET GAUGE</span><h3>Air Quality Target Gauge</h3></header><label>Target Value<input id="gaugeTarget" type="number" min="10" max="100" value="72"></label><fieldset><legend>Warning Zone</legend><label><input type="radio" name="gaugeZone" value="safe" checked>Safety</label><label><input type="radio" name="gaugeZone" value="watch">Watch</label><label><input type="radio" name="gaugeZone" value="risk">Risk</label></fieldset><output id="gaugeVariance">Distance to target 28</output><button id="gaugeCalibrate" class="action" type="button" data-core-bridge="drawing-data-viz-gauge-meter">Calibrate pointer</button></section></div><!-- 11DZ_CORE_END --></section></div><p id="status" class="status" role="status" aria-live="polite"></p></section></div>
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<script>
'use strict';
const statusOutput = document.querySelector('#status');
const announce = message => { statusOutput.textContent = message; };
/* 11DZ_CORE_SCRIPT_START:drawing-data-viz-gauge-meter */
const canvas = document.querySelector('#artboard'); const context = canvas.getContext('2d'); const amount = document.querySelector('#canvasAmount'); let drawSeed = 1578920859;
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 = '#3a2419'; 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?'#c66a2d':'#b5c88d'; context.fillStyle=context.strokeStyle+'88'; context.lineWidth=(2+random()*4)*Math.max(.6,drawingFactor);
context.arc(width/2,height*.72,45+index*3,Math.PI,Math.PI+random()*Math.PI); 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 gaugeTarget=document.querySelector('#gaugeTarget');const gaugeZones=[...document.querySelectorAll('[name="gaugeZone"]')];const gaugeState={target:72,zone:'safe',calibrations:0};function tuneGauge(){gaugeState.target=Math.max(10,Math.min(100,Number(gaugeTarget.value)||10));gaugeState.zone=gaugeZones.find(input=>input.checked)?.value||'safe';const zoneFactor={safe:.78,watch:1,risk:1.32}[gaugeState.zone];canvas.dataset.drawingFactor=String(zoneFactor);canvas.dataset.drawingShift=String(gaugeState.target+gaugeState.calibrations);document.querySelector('#gaugeVariance').textContent='Distance to Goal '+Math.abs(100-gaugeState.target)+' · Calibration '+gaugeState.calibrations+' Next';drawCanvas();}gaugeTarget.addEventListener('input',tuneGauge);gaugeZones.forEach(input=>input.addEventListener('change',tuneGauge));document.querySelector('#gaugeCalibrate').addEventListener('click',()=>{gaugeState.calibrations+=1;amount.value=String(Math.max(Number(amount.min),Math.round(gaugeState.target/5)));tuneGauge();announce('The gauge needle has been calibrated to the target value');});tuneGauge();
/* 11DZ_CORE_SCRIPT_END */
const workflowBridgeSpec={"name":"drawing-data-viz-gauge-meter","selector":"[data-core-bridge=\"drawing-data-viz-gauge-meter\"]","mode":"click","key":"Enter"};const workflowBridgeCore=document.querySelector('#workflowCore');const workflowBridgeControl=workflowBridgeCore.querySelector(workflowBridgeSpec.selector);if(!workflowBridgeControl)throw new Error('Missing core bridge: '+workflowBridgeSpec.name);const workflowBridgeControlledId=workflowBridgeControl.getAttribute('aria-controls');const workflowBridgeControlled=workflowBridgeControlledId?document.getElementById(workflowBridgeControlledId):null;workflowBridgeCore.dataset.workflowBridge=workflowBridgeSpec.name;workflowBridgeCore.dataset.workflowVersion='0';function workflowBridgeSerialize(){const visualNode=workflowBridgeCore.firstElementChild||workflowBridgeCore;const visual=getComputedStyle(visualNode);const outputs=[...workflowBridgeCore.querySelectorAll('output,[role="status"],[aria-live],meter,progress')].map(node=>node.textContent.trim()+'|'+node.getAttribute('aria-valuenow')+'|'+node.getAttribute('value'));const canvas=[...workflowBridgeCore.querySelectorAll('canvas')].map(node=>{try{return node.toDataURL().slice(-160);}catch{return 'canvas-unavailable';}});return JSON.stringify({html:workflowBridgeCore.innerHTML,status:statusOutput.textContent,outputs,canvas,visual:[visual.display,visual.visibility,visual.opacity,visual.transform,visual.filter,visual.backgroundColor,visual.width,visual.height],scroll:workflowBridgeSpec.mode==='scroll'?workflowBridgeControl.scrollTop:null});}let workflowBridgeLastEffect=workflowBridgeSerialize();function workflowBridgeSummary(){const label=(workflowBridgeControl.getAttribute('aria-label')||workflowBridgeControl.textContent||workflowBridgeControl.value||workflowBridgeSpec.name).trim().replace(/\s+/g,' ').slice(0,72);return label+' · Core Version '+workflowBridgeCore.dataset.workflowVersion;}function workflowBridgeCommit(){const effect=workflowBridgeSerialize();if(effect===workflowBridgeLastEffect)return {changed:false,summary:workflowBridgeSummary()};workflowBridgeLastEffect=effect;workflowBridgeCore.dataset.workflowVersion=String(Number(workflowBridgeCore.dataset.workflowVersion||0)+1);return {changed:true,summary:workflowBridgeSummary()};}function workflowBridgeScheduleCommit(){queueMicrotask(workflowBridgeCommit);setTimeout(workflowBridgeCommit,0);}workflowBridgeControl.addEventListener("click",workflowBridgeScheduleCommit);const workflowBridgeStateTargets=new Set(workflowBridgeCore.querySelectorAll('dialog'));if(workflowBridgeControlled&&workflowBridgeCore.contains(workflowBridgeControlled))workflowBridgeStateTargets.add(workflowBridgeControlled);workflowBridgeStateTargets.forEach(target=>['close','cancel','toggle'].forEach(eventName=>target.addEventListener(eventName,workflowBridgeScheduleCommit)));function workflowBridgeActivate(){workflowBridgeControl.focus();workflowBridgeControl.click();const result=workflowBridgeCommit();setTimeout(workflowBridgeCommit,0);return result;}function workflowBridgeReset(){workflowBridgeCore.dataset.workflowVersion='0';workflowBridgeLastEffect=workflowBridgeSerialize();}
const workflowDispatchCore=document.querySelector('#workflowCore');const workflowDispatchForm=document.querySelector('#workflowDispatchForm');const workflowDispatchSelect=document.querySelector('#workflowDispatchActive');const workflowDispatchJobs=new Map([["1",{"label":"Roadside Station","amount":12,"priority":"normal","touches":0}],["2",{"label":"Park Station","amount":21,"priority":"urgent","touches":0}]]);let workflowDispatchSerial=workflowDispatchJobs.size;function workflowDispatchDrive(job,activate=false){workflowDispatchCore.dataset.dispatchPriority=job.priority;workflowDispatchCore.style.setProperty('--dispatch-load',Math.min(.95,.16+job.amount/120));const bridge=activate?workflowBridgeActivate():{changed:false,summary:workflowBridgeSummary()};document.querySelector('#workflowDispatchSummary').textContent=job.label+' · '+job.amount+' AQI · '+bridge.summary;announce('Current tasks at the air quality station:'+job.label);}function workflowDispatchRender(activeId,activate=false){workflowDispatchSelect.replaceChildren(...[...workflowDispatchJobs].map(([id,job])=>{const option=document.createElement('option');option.value=id;option.textContent=job.label+(job.priority==='urgent'?' · Urgent':'');return option;}));workflowDispatchSelect.value=activeId;workflowDispatchDrive(workflowDispatchJobs.get(activeId),activate);}workflowDispatchForm.addEventListener('submit',event=>{event.preventDefault();const data=new FormData(workflowDispatchForm);const id=String(++workflowDispatchSerial);workflowDispatchJobs.set(id,{label:document.querySelector('#workflowDispatchKind').value,amount:Math.max(1,Number(document.querySelector('#workflowDispatchAmount').value)||1),priority:data.get('workflowPriority'),touches:0});workflowDispatchRender(id,true);});workflowDispatchSelect.addEventListener('change',()=>workflowDispatchDrive(workflowDispatchJobs.get(workflowDispatchSelect.value),true));workflowDispatchCore.addEventListener('focusin',()=>{const job=workflowDispatchJobs.get(workflowDispatchSelect.value);if(!job)return;job.touches+=1;document.querySelector('#workflowDispatchSummary').textContent=job.label+' · '+job.amount+' AQI · '+workflowBridgeSummary();});workflowDispatchRender('1',false);
workflowBridgeReset();
</script>
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