$(document).ready( function() { var count = parseInt( $('#facet-count').text() ); if ( count > 5000 ) { console.debug( 'skip graph', count ); return; } console.debug( 'drawing graph', count ); var data = { x: { min: Number.MAX_VALUE, max: Number.MIN_VALUE, range: 0, inc: 0, inc_bar: 0, data: [], px: [], num_labels: 0, label_spacing: 30, }, y: { min: Number.MAX_VALUE, max: Number.MIN_VALUE, range: 0, data: [], inc: 0, num_labels: 0, label_spacing: 25, }, width: 600, height: 400, }; var ul = $('ul#facet'); ul.find('li label').each( function(){ var v = parseFloat( $(this).text() ); if ( isNaN(v) ) v = 0; if ( v > data.x.max ) data.x.max = v; if ( v < data.x.min ) data.x.min = v; data.x.data.push( v ); }); ul.find('li span.count').each( function(){ var v = parseFloat( $(this).text() ); // FIXME not numeric! if ( isNaN(v) ) v = 0; if ( v > data.y.max ) data.y.max = v; if ( v < data.y.min ) data.y.min = v; data.y.data.push( v ); }); data.y.min = 0; // XXX force to 0, because it's count data.x.range = data.x.max - data.x.min; data.y.range = data.y.max - data.y.min; data.numeric = $('span#numeric').length; data.x.inc_bar = data.numeric ? Math.round( data.width / data.x.range ) : data.width / data.x.data.length ; var canvas = $(''); canvas.attr({ width: data.width, height: data.height, }); var canvasContain = $('
') .css({ width: data.width, height: data.height }) .append( canvas ) .insertBefore( ul ); var ctx = canvas[0].getContext('2d'); ctx.translate( 0, data.height ); // start at bottom left ctx.lineWidth = 2; ctx.strokeStyle = '#ff8800'; ctx.fillStyle = '#ffcc88'; ctx.moveTo( 0, 0 ); ctx.beginPath(); var elements = data.x.data.length; var step = elements / data.width; console.debug( elements, step ); if ( step < 1 ) step = 1; var i_float = 0; while( i_float < elements ) { var i = i_float.toFixed(); var x = data.x.data[i]; if ( data.numeric ) x = Math.ceil( ( x - data.x.min ) / data.x.range * data.width ); var y = Math.ceil( ( data.y.data[i] - data.y.min ) / data.y.range * data.height ); if ( data.numeric ) { ctx.lineTo( x, -y ); data.x.px.push( x ); } else { var x_px = i * data.x.inc_bar; // console.debug( x_px, y ); ctx.fillRect( x_px, 0, data.x.inc_bar, -y ); ctx.strokeRect( x_px, 0, data.x.inc_bar, -y ); } i_float += step; } ctx.stroke(); ctx.closePath(); function draw_labels(class_name,axis,size,css_pos,last_css_pos) { var labels = $('') .css({ width: data.width, height: data.height, position: 'absolute' }); axis.num_labels = Math.round( size / axis.label_spacing ); if ( axis.num_labels > axis.range ) axis.num_labels = axis.range; axis.inc = Math.ceil( axis.range / axis.num_labels ); for( var val = axis.min; val < axis.max ; val += axis.inc ) { var pos = Math.ceil( ( val - axis.min ) / axis.range * size ); $('
  • ' + val + '
  • ') .appendTo(labels); } $('
  • ' + axis.max + '
  • ') .appendTo(labels); labels.appendTo(canvasContain); } if ( data.numeric ) draw_labels( 'labels-x', data.x, data.width, 'left', 'right:0px' ); draw_labels( 'labels-y', data.y, data.height, 'bottom', 'bottom:'+data.height+'px' ); console.debug( 'data', data ); }); // document.ready