2 min_x: Number.MAX_VALUE,
3 max_x: Number.MIN_VALUE,
4 min_y: Number.MAX_VALUE,
5 max_y: Number.MIN_VALUE,
14 var ul = $('ul#facet');
16 ul.find('li label').each( function(){
17 var v = parseFloat( $(this).text() );
18 if ( isNaN(v) ) v = 0;
19 if ( v > data.max_x ) data.max_x = v;
20 if ( v < data.min_x ) data.min_x = v;
21 data.x_data.push( v );
24 ul.find('li span.count').each( function(){
25 var v = parseFloat( $(this).text() ); // FIXME not numeric!
26 if ( isNaN(v) ) v = 0;
27 if ( v > data.max_y ) data.max_y = v;
28 if ( v < data.min_y ) data.min_y = v;
29 data.y_data.push( v );
33 data.x_range = data.max_x - data.min_x;
34 data.y_range = data.max_y - data.min_y;
37 var y_num_labels = Math.round( data.height / 20 ); // padding between vertical labels
38 var y_inc = Math.ceil( data.y_range / y_num_labels );
40 var y_pos = data.min_y;
41 while( y_pos < data.max_y - y_inc ) {
42 data.y_labels.push( y_pos );
45 data.y_labels.push( data.max_y );
47 data.numeric = $('span#numeric').length;
48 data.x_inc = Math.round( data.width / data.x_range );
50 console.debug( 'data', data );
52 var canvas = $('<canvas/>');
59 var canvasContain = $('<div class="chart"></div>')
60 .css({ width: data.width, height: data.height })
64 var ctx = canvas[0].getContext('2d');
65 ctx.translate( 0, data.height ); // start at bottom left
67 ctx.strokeStyle = '#ff8800';
68 ctx.fillStyle = '#ffcc88';
73 for( var i in data.x_data ) {
74 var x = data.x_data[i];
75 if ( data.numeric ) x = Math.ceil( ( x - data.min_x ) / data.x_range * data.width );
76 var y = Math.ceil( ( data.y_data[i] - data.min_y ) / data.y_range * data.height );
77 // console.debug( i, x, y );
82 var x_px = i * data.x_inc;
83 console.debug( x_px, y );
84 ctx.fillRect( x_px, 0, data.x_inc, -y );
85 ctx.strokeRect( x_px, 0, data.x_inc, -y );
92 var labels_x = $('<ul class="labels-x"></ul>')
93 .css({ width: data.width, height: data.height, position: 'absolute' });
97 for( var i in data.x_data ) {
98 if ( Math.abs( data.x_px[i] - x_pos ) > 20 ) {
100 $('<li><span class="line"></span><span class="label">' + data.x_data[i] + '</span></li>')
101 .css({ left: x_pos })
105 labels_x.appendTo(canvasContain);
107 var labels_y = $('<ul class="labels-y"></ul>')
108 .css({ width: data.width, height: data.height, position: 'absolute' });
110 for( var i in data.y_labels ) {
111 $('<li><span class="line"></span><span class="label">' + data.y_labels[i] + '</span></li>')
112 .css({ bottom: Math.ceil( data.y_labels[i] / data.y_range * data.height ) })
115 labels_y.appendTo(canvasContain);