2 min_x: Number.MAX_VALUE,
3 max_x: Number.MIN_VALUE,
4 min_y: Number.MAX_VALUE,
5 max_y: Number.MIN_VALUE,
13 var ul = $('ul#facet');
15 ul.find('li label').each( function(){
16 var v = parseFloat( $(this).text() );
17 if ( isNaN(v) ) v = 0;
18 if ( v > data.max_x ) data.max_x = v;
19 if ( v < data.min_x ) data.min_x = v;
20 data.x_data.push( v );
23 ul.find('li span.count').each( function(){
24 var v = parseFloat( $(this).text() ); // FIXME not numeric!
25 if ( isNaN(v) ) v = 0;
26 if ( v > data.max_y ) data.max_y = v;
27 if ( v < data.min_y ) data.min_y = v;
28 data.y_data.push( v );
32 data.x_range = data.max_x - data.min_x;
33 data.y_range = data.max_y - data.min_y;
36 var y_num_labels = Math.round( data.height / 30 ); // padding between vertical labels
37 var y_inc = Math.ceil( data.y_range / y_num_labels );
39 var y_pos = data.min_y;
40 while( y_pos < data.max_y - y_inc ) {
41 data.y_labels.push( y_pos );
44 data.y_labels.push( data.max_y );
46 console.debug( 'data', data );
48 var canvas = $('<canvas/>');
55 var canvasContain = $('<div class="chart"></div>')
56 .css({ width: data.width, height: data.height })
60 var ctx = canvas[0].getContext('2d');
61 ctx.translate( 0, data.height ); // start at bottom left
63 ctx.strokeStyle = '#ff8800';
65 ctx.moveTo( 0, -data.y_data[0] );
68 for( var i in data.x_data ) {
69 var x = Math.ceil( ( data.x_data[i] - data.min_x ) / data.x_range * data.width );
70 var y = Math.ceil( ( data.y_data[i] - data.min_y ) / data.y_range * data.height );
71 console.debug( i, x, y );