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 );
32 data.min_y = 0; // XXX force to 0, because it's count
34 data.x_range = data.max_x - data.min_x;
35 data.y_range = data.max_y - data.min_y;
38 var y_num_labels = Math.round( data.height / 20 ); // padding between vertical labels
39 var y_inc = Math.ceil( data.y_range / y_num_labels );
41 var y_pos = data.min_y;
42 var y_last_pos = Math.ceil( data.max_y - y_inc / 2 );
43 while( y_pos < y_last_pos ) {
44 data.y_labels.push( y_pos );
47 data.y_labels.push( data.max_y );
49 data.numeric = $('span#numeric').length;
50 data.x_inc = data.numeric
51 ? Math.round( data.width / data.x_range )
52 : data.width / data.x_data.length
55 console.debug( 'data', data );
57 var canvas = $('<canvas/>');
64 var canvasContain = $('<div class="chart"></div>')
65 .css({ width: data.width, height: data.height })
69 var ctx = canvas[0].getContext('2d');
70 ctx.translate( 0, data.height ); // start at bottom left
72 ctx.strokeStyle = '#ff8800';
73 ctx.fillStyle = '#ffcc88';
78 for( var i in data.x_data ) {
79 var x = data.x_data[i];
80 if ( data.numeric ) x = Math.ceil( ( x - data.min_x ) / data.x_range * data.width );
81 var y = Math.ceil( ( data.y_data[i] - data.min_y ) / data.y_range * data.height );
86 var x_px = i * data.x_inc;
87 console.debug( x_px, y );
88 ctx.fillRect( x_px, 0, data.x_inc, -y );
89 ctx.strokeRect( x_px, 0, data.x_inc, -y );
96 var labels_x = $('<ul class="labels-x"></ul>')
97 .css({ width: data.width, height: data.height, position: 'absolute' });
101 for( var i in data.x_data ) {
102 if ( data.numeric && ( i == 0 || Math.abs( data.x_px[i] - x_pos ) > 20 ) ) {
103 x_pos = data.x_px[i];
104 $('<li><span class="line"></span><span class="label">' + data.x_data[i] + '</span></li>')
105 .css({ left: x_pos })
109 labels_x.appendTo(canvasContain);
111 var labels_y = $('<ul class="labels-y"></ul>')
112 .css({ width: data.width, height: data.height, position: 'absolute' });
114 for( var i in data.y_labels ) {
115 $('<li><span class="line"></span><span class="label">' + data.y_labels[i] + '</span></li>')
116 .css({ bottom: Math.ceil( ( data.y_labels[i] - data.min_y ) / data.y_range * data.height ) })
119 labels_y.appendTo(canvasContain);