Air Quality Waveform Plotter
Complete a waveform visualizer in an air-quality scenario: includes real content, interactive controls, clear status feedback, and responsive layouts across sizes.
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<title>Air Quality Waveform Plotter</title>
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<header class="mast"><div><span class="eyebrow">playful / waveform generator / ADVANCED</span><h1>Air Quality Waveform Plotter</h1><p class="intro">Complete a waveform visualizer in an air-quality scenario: includes real content, interactive controls, clear status feedback, and responsive layouts across sizes.</p></div><span class="scenario">Air Quality</span></header>
<figure class="composition-gallery"><section class="demo" aria-label="Air Quality Waveform Renderer 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="45"><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-waveform --><div class="drawing-pattern drawing-pattern-9"><div class="canvas-shell"><canvas id="artboard" width="900" height="440" aria-label="Waveform Canvas" aria-describedby="canvasDescription"></canvas><div class="canvas-tools panel"><span class="eyebrow">CANVAS MODE 10</span><h2>Waveform Plotter</h2><label>Complexity <input id="canvasAmount" type="range" min="4" max="28" value="37"></label><button id="redrawCanvas" class="action primary" type="button">Redraw</button><p id="canvasDescription" class="muted">On a dark canvas, a waveform visualizer is drawn with two high-contrast colors, and the complexity slider determines the number of shapes; everything is generated locally in the browser.</p></div></div><section class="drawing-controller waveform-controller"><header><span class="eyebrow">SIGNAL DESK</span><h3>Air quality waveform signal</h3></header><label>Input gain<input id="waveformGain" type="range" min="20" max="180" value="100" data-core-bridge="drawing-data-viz-waveform"><output id="waveformGainValue">1.00×</output></label><label>Observation window<select id="waveformWindow"><option value="short">Short window</option><option value="medium" selected>Mid Window</option><option value="long">Long window</option></select></label><button id="waveformFreeze" class="action" type="button" aria-pressed="false">Freeze the waveform</button><output id="waveformReadout">Signal in motion</output></section></div><!-- 11DZ_CORE_END --></section></div><p id="status" class="status" role="status" aria-live="polite"></p></section><figcaption class="gallery-caption"><strong>Air Quality / GALLERY 03</strong></figcaption></figure>
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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-waveform */
const canvas = document.querySelector('#artboard'); const context = canvas.getContext('2d'); const amount = document.querySelector('#canvasAmount'); let drawSeed = 2471729897;
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 = '#24213a'; 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?'#e6a23c':'#a8a1d8'; context.fillStyle=context.strokeStyle+'88'; context.lineWidth=(2+random()*4)*Math.max(.6,drawingFactor);
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} 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 waveformGain=document.querySelector('#waveformGain');const waveformWindow=document.querySelector('#waveformWindow');const waveformFreeze=document.querySelector('#waveformFreeze');const waveformState={gain:1,window:'medium',frozen:false,frames:0};function processWaveform(){waveformState.gain=Number(waveformGain.value)/100;waveformState.window=waveformWindow.value;document.querySelector('#waveformGainValue').textContent=waveformState.gain.toFixed(2)+'×';document.querySelector('#waveformReadout').textContent=(waveformState.frozen?'Frozen':'Signal in motion')+' · '+waveformState.window+' · frames '+workflowSafeFrame();canvas.dataset.drawingFactor=String(waveformState.gain*({short:.7,medium:1,long:1.25}[waveformState.window]));canvas.dataset.drawingShift=String(waveformState.frames++);canvas.dataset.drawingBlend=waveformState.frozen?'source-over':'screen';drawCanvas();}function workflowSafeFrame(){return waveformState.frames%1000;}waveformGain.addEventListener('input',processWaveform);waveformWindow.addEventListener('change',processWaveform);waveformFreeze.addEventListener('click',()=>{waveformState.frozen=!waveformState.frozen;waveformFreeze.setAttribute('aria-pressed',String(waveformState.frozen));waveformFreeze.textContent=waveformState.frozen?'Continue waveform':'Freeze the waveform';processWaveform();announce(waveformState.frozen?'Waveform frozen':'Waveform keeps updating');});processWaveform();
/* 11DZ_CORE_SCRIPT_END */
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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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