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 var y_last_pos = Math.ceil( data.max_y - y_inc / 2 );
42 while( y_pos < y_last_pos ) {
43 data.y_labels.push( y_pos );
46 data.y_labels.push( data.max_y );
48 data.numeric = $('span#numeric').length;
49 data.x_inc = data.numeric
50 ? Math.round( data.width / data.x_range )
51 : data.width / data.x_data.length
54 console.debug( 'data', data );
56 var canvas = $('<canvas/>');
63 var canvasContain = $('<div class="chart"></div>')
64 .css({ width: data.width, height: data.height })
68 var ctx = canvas[0].getContext('2d');
69 ctx.translate( 0, data.height ); // start at bottom left
71 ctx.strokeStyle = '#ff8800';
72 ctx.fillStyle = '#ffcc88';
77 for( var i in data.x_data ) {
78 var x = data.x_data[i];
79 if ( data.numeric ) x = Math.ceil( ( x - data.min_x ) / data.x_range * data.width );
80 var y = Math.ceil( ( data.y_data[i] - data.min_y ) / data.y_range * data.height );
85 var x_px = i * data.x_inc;
86 console.debug( x_px, y );
87 ctx.fillRect( x_px, 0, data.x_inc, -y );
88 ctx.strokeRect( x_px, 0, data.x_inc, -y );
95 var labels_x = $('<ul class="labels-x"></ul>')
96 .css({ width: data.width, height: data.height, position: 'absolute' });
100 for( var i in data.x_data ) {
101 if ( data.numeric && ( i == 0 || Math.abs( data.x_px[i] - x_pos ) > 20 ) ) {
102 x_pos = data.x_px[i];
103 $('<li><span class="line"></span><span class="label">' + data.x_data[i] + '</span></li>')
104 .css({ left: x_pos })
108 labels_x.appendTo(canvasContain);
110 var labels_y = $('<ul class="labels-y"></ul>')
111 .css({ width: data.width, height: data.height, position: 'absolute' });
113 for( var i in data.y_labels ) {
114 $('<li><span class="line"></span><span class="label">' + data.y_labels[i] + '</span></li>')
115 .css({ bottom: Math.ceil( ( data.y_labels[i] - data.min_y ) / data.y_range * data.height ) })
118 labels_y.appendTo(canvasContain);