X-Git-Url: http://git.rot13.org/?a=blobdiff_plain;f=public%2Ffacet_graph.js;h=21b8dd97a70afa8762f807c005e3187492f820cc;hb=d8238013074fb0818f27bd0eb0e5b58bec94cb1a;hp=301a4701a777238f348055b4b8b7f8a62244677c;hpb=e387ca83878bc530f02e5697d3a15c306566ac64;p=MojoFacets.git

diff --git a/public/facet_graph.js b/public/facet_graph.js
index 301a470..21b8dd9 100644
--- a/public/facet_graph.js
+++ b/public/facet_graph.js
@@ -1,11 +1,33 @@
+$(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 = {
-	min_x: 0,
-	max_x: 0,
-	min_y: 0,
-	max_y: 0,
-	x_data: [],
-	y_data: [],
-	y_labels: [],
+	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,
 };
@@ -15,35 +37,31 @@ var ul = $('ul#facet');
 ul.find('li label').each( function(){
 	var v = parseFloat( $(this).text() );
 	if ( isNaN(v) ) v = 0;
-	if ( v > data.max_x ) data.max_x = v;
-	if ( v < data.min_x ) data.min_x = v;
-	data.x_data.push( v );
+	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.max_y ) data.max_y = v;
-	if ( v < data.min_y ) data.min_y = v;
-	data.y_data.push( v );
+	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.max_x - data.min_x;
-data.y_range = data.max_y - data.min_y;
+data.x.range = data.x.max - data.x.min;
+data.y.range = data.y.max - data.y.min;
 
 
-var y_num_labels = Math.round( data.height / 30 ); // padding between vertical labels
-var y_inc = Math.ceil( data.y_range / y_num_labels );
-
-var y_pos = data.min_y;
-while( y_pos < data.max_y - y_inc ) {
-	data.y_labels.push( y_pos );
-	y_pos += y_inc;
-}
-data.y_labels.push( data.max_y );
 
-console.debug( 'data', data );
+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/>');
 
@@ -61,17 +79,63 @@ 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, -data.y_data[0] );
+ctx.moveTo( 0, 0 );
 ctx.beginPath();
 
-for( var i in data.x_data ) {
-	var x = Math.ceil( ( data.x_data[i] - data.min_x ) / data.x_range * data.width  );
-	var y = Math.ceil( ( data.y_data[i] - data.min_y ) / data.y_range * data.height );
-	console.debug( i, x, y );
-	ctx.lineTo( x, -y );
+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 = $('<ul class="'+class_name+'"></ul>')
+		.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 );
+		$('<li style="'+css_pos+': '+pos+'px"><span class="line"></span><span class="label">' + val + '</span></li>')
+			.appendTo(labels);
+	}
+
+	$('<li style="'+last_css_pos+'"><span class="line"></span><span class="label">' + axis.max + '</span></li>')
+		.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