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/* Bar Chart — frontend.js (Chart.js via CDN) */ |
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( function () { |
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var CHARTJS_CDN = 'https://cdn.jsdelivr.net/npm/chart.js@4.4.3/dist/chart.umd.min.js'; |
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|
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function loadChartJs(cb) { |
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if (window.Chart) { cb(); return; } |
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var s=document.createElement('script'); s.src=CHARTJS_CDN; s.onload=cb; document.head.appendChild(s); |
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} |
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|
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function hexToRgb(hex) { |
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return parseInt(hex.slice(1,3),16)+','+parseInt(hex.slice(3,5),16)+','+parseInt(hex.slice(5,7),16); |
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} |
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|
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function initChart(wrap) { |
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var canvas = wrap.querySelector('canvas'); |
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if (!canvas) return; |
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var labels = (wrap.dataset.labels||'').split(',').map(s=>s.trim()); |
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var datasets = JSON.parse(wrap.dataset.datasets||'[]'); |
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var orient = wrap.dataset.orientation==='horizontal'; |
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var stacked = wrap.dataset.stacked==='1'; |
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var barRadius = parseInt(wrap.dataset.barRadius)||0; |
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var height = parseInt(wrap.dataset.height)||340; |
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var showGrid = wrap.dataset.grid!=='0'; |
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var showLeg = wrap.dataset.legend!=='0'; |
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var legPos = wrap.dataset.legendPos||'top'; |
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|
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canvas.height = height; |
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|
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var chartDatasets = datasets.map(function(ds) { |
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var rgb=hexToRgb(ds.color||'#6c3fb5'); |
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return { |
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label: ds.label, |
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data: (ds.data||'').split(',').map(Number), |
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backgroundColor: 'rgba('+rgb+',0.82)', |
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borderColor: ds.color, |
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borderWidth: 1, |
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borderRadius: barRadius, |
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borderSkipped: false, |
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}; |
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}); |
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|
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new window.Chart(canvas,{ |
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type: orient ? 'bar' : 'bar', |
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data: {labels:labels,datasets:chartDatasets}, |
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options:{ |
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indexAxis: orient ? 'y' : 'x', |
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responsive:true, |
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plugins:{legend:{display:showLeg,position:legPos}}, |
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scales:{ |
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x:{stacked:stacked,grid:{display:showGrid}}, |
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y:{stacked:stacked,grid:{display:showGrid}}, |
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}, |
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} |
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}); |
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} |
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|
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function init(){ |
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var wraps=document.querySelectorAll('.bkbc-wrap[data-type]'); |
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if(!wraps.length) return; |
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loadChartJs(function(){ wraps.forEach(initChart); }); |
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} |
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if(document.readyState==='loading') document.addEventListener('DOMContentLoaded',init); |
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else init(); |
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}() ); |
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