[galaxy-commits] galaxy-dist commit 77753eec8e43: trackster: Changing display mode from "Auto" now fetches additional detail data and displays features. Displays error messages in canvas elements if present. Limit number of features displayed in one tile due to above feature. Fix bugs in visualization creation from form

8 Sep 2010

# HG changeset patch -- Bitbucket.org
# Project galaxy-dist
# URL http://bitbucket.org/galaxy/galaxy-dist/overview
# User Kanwei Li kanwei@gmail.com
# Date 1283379642 14400
# Node ID 77753eec8e43449075a8f5599860e6c5a3d7c9b3
# Parent  4a621d4e127a76467d996fdf25b3a7e1ead4ddb9
trackster: Changing display mode from "Auto" now fetches additional detail data and displays features. Displays error messages in canvas elements if present. Limit number of features displayed in one tile due to above feature. Fix bugs in visualization creation from form

--- a/lib/galaxy/visualization/tracks/data/interval_index.py
+++ b/lib/galaxy/visualization/tracks/data/interval_index.py
@@ -9,6 +9,8 @@ import pkg_resources; pkg_resources.requ
 from bx.interval_index_file import Indexes
 from galaxy.datatypes.interval import Bed, Gff
+MAX_VALS = 500 # only display first MAX_VALS features
+
 class IntervalIndexDataProvider( object ):
     def __init__( self, converted_dataset, original_dataset ):
         self.original_dataset = original_dataset
@@ -20,8 +22,14 @@ class IntervalIndexDataProvider( object 
         source = open( self.original_dataset.file_name )
         index = Indexes( self.converted_dataset.file_name )
         results = []
+        count = 0
+        message = None
for start, end, offset in index.find(chrom, start, end):
+            if count >= MAX_VALS:
+                message = "Only the first %s features are being displayed." % MAX_VALS
+                break
+            count += 1
             source.seek(offset)
             feature = source.readline().split()
             payload = [ offset, start, end ]
@@ -53,4 +61,4 @@ class IntervalIndexDataProvider( object
results.append(payload)
-        return results
+        return { 'data': results, 'message': message }
--- a/static/scripts/packed/trackster.js
+++ b/static/scripts/packed/trackster.js
@@ -1,1 +1,1 @@
-var DENSITY=200,FEATURE_LEVELS=10,DATA_ERROR="There was an error in indexing this dataset. ",DATA_NOCONVERTER="A converter for this dataset is not installed. Please check your datatypes_conf.xml file.",DATA_NONE="No data for this chrom/contig.",DATA_PENDING="Currently indexing... please wait",DATA_LOADING="Loading data...",CACHED_TILES_FEATURE=10,CACHED_TILES_LINE=30,CACHED_DATA=5,CONTEXT=$("<canvas></canvas>").get(0).getContext("2d"),PX_PER_CHAR=CONTEXT.measureText("A").width,RIGHT_STRAND,LEFT_STRAND;var right_img=new Image();right_img.src=image_path+"/visualization/strand_right.png";right_img.onload=function(){RIGHT_STRAND=CONTEXT.createPattern(right_img,"repeat")};var left_img=new Image();left_img.src=image_path+"/visualization/strand_left.png";left_img.onload=function(){LEFT_STRAND=CONTEXT.createPattern(left_img,"repeat")};var right_img_inv=new Image();right_img_inv.src=image_path+"/visualization/strand_right_inv.png";right_img_inv.onload=function(){RIGHT_STRAND_INV=CONT
 EXT.createPattern(right_img_inv,"repeat")};var left_img_inv=new Image();left_img_inv.src=image_path+"/visualization/strand_left_inv.png";left_img_inv.onload=function(){LEFT_STRAND_INV=CONTEXT.createPattern(left_img_inv,"repeat")};function round_1000(a){return Math.round(a*1000)/1000}var Cache=function(a){this.num_elements=a;this.clear()};$.extend(Cache.prototype,{get:function(b){var a=this.key_ary.indexOf(b);if(a!=-1){this.key_ary.splice(a,1);this.key_ary.push(b)}return this.obj_cache[b]},set:function(b,c){if(!this.obj_cache[b]){if(this.key_ary.length>=this.num_elements){var a=this.key_ary.shift();delete this.obj_cache[a]}this.key_ary.push(b)}this.obj_cache[b]=c;return c},clear:function(){this.obj_cache={};this.key_ary=[]}});var View=function(a,c,e,d,b){this.container=a;this.vis_id=d;this.dbkey=b;this.title=e;this.chrom=c;this.tracks=[];this.label_tracks=[];this.max_low=0;this.max_high=0;this.num_tracks=0;this.track_id_counter=0;this.zoom_factor=3;this.min_separation=30;this
 .has_changes=false;this.init();this.reset()};$.extend(View.prototype,{init:function(){var c=this.container,a=this;this.top_labeltrack=$("<div/>").addClass("top-labeltrack").appendTo(c);this.content_div=$("<div/>").addClass("content").css("position","relative").appendTo(c);this.intro_div=$("<div/>").addClass("intro").text("Select a chrom from the dropdown below").hide().appendTo(c);this.viewport_container=$("<div/>").addClass("viewport-container").addClass("viewport-container").appendTo(this.content_div);this.nav_container=$("<div/>").addClass("nav-container").appendTo(c);this.nav_labeltrack=$("<div/>").addClass("nav-labeltrack").appendTo(this.nav_container);this.nav=$("<div/>").addClass("nav").appendTo(this.nav_container);this.overview=$("<div/>").addClass("overview").appendTo(this.nav);this.overview_viewport=$("<div/>").addClass("overview-viewport").appendTo(this.overview);this.overview_box=$("<div/>").addClass("overview-box").appendTo(this.overview_viewport);this.default_o
 verview_height=this.overview_box.height();this.nav_controls=$("<div/>").addClass("nav-controls").appendTo(this.nav);this.chrom_form=$("<form/>").attr("action",function(){void (0)}).appendTo(this.nav_controls);this.chrom_select=$("<select/>").attr({name:"chrom"}).css("width","15em").addClass("no-autocomplete").append("<option value=''>Loading</option>").appendTo(this.chrom_form);var b=function(d){if(d.type==="focusout"||(d.keyCode||d.which)===13||(d.keyCode||d.which)===27){if((d.keyCode||d.which)!==27){a.go_to($(this).val())}$(this).hide();a.location_span.show();a.chrom_select.show();return false}};this.nav_input=$("<input/>").addClass("nav-input").hide().bind("keypress focusout",b).appendTo(this.chrom_form);this.location_span=$("<span/>").addClass("location").appendTo(this.chrom_form);this.location_span.bind("click",function(){a.location_span.hide();a.chrom_select.hide();a.nav_input.css("display","inline-block");a.nav_input.focus()});if(this.vis_id!==undefined){this.hidden_i
 nput=$("<input/>").attr("type","hidden").val(this.vis_id).appendTo(this.chrom_form)}this.zo_link=$("<a/>").click(function(){a.zoom_out();a.redraw()}).html('<img src="'+image_path+'/fugue/magnifier-zoom-out.png" />').appendTo(this.chrom_form);this.zi_link=$("<a/>").click(function(){a.zoom_in();a.redraw()}).html('<img src="'+image_path+'/fugue/magnifier-zoom.png" />').appendTo(this.chrom_form);$.ajax({url:chrom_url,data:(this.vis_id!==undefined?{vis_id:this.vis_id}:{dbkey:this.dbkey}),dataType:"json",success:function(d){if(d.reference){a.add_label_track(new ReferenceTrack(a))}a.chrom_data=d.chrom_info;var f='<option value="">Select Chrom/Contig</option>';for(i in a.chrom_data){var e=a.chrom_data[i]["chrom"];f+='<option value="'+e+'">'+e+"</option>"}a.chrom_select.html(f);a.intro_div.show();a.content_div.hide();a.chrom_select.bind("change",function(){a.change_chrom(a.chrom_select.val())})},error:function(){alert("Could not load chroms for this dbkey:",a.dbkey)}});this.content_d
 iv.bind("dblclick",function(d){a.zoom_in(d.pageX,this.viewport_container)});this.overview_box.bind("dragstart",function(d){this.current_x=d.offsetX}).bind("drag",function(d){var g=d.offsetX-this.current_x;this.current_x=d.offsetX;var f=Math.round(g/a.viewport_container.width()*(a.max_high-a.max_low));a.move_delta(-f)});this.viewport_container.bind("dragstart",function(d){this.original_low=a.low;this.current_height=d.clientY;this.current_x=d.offsetX;this.active=(d.clientX<a.viewport_container.width()-16)?true:false}).bind("drag",function(g){if(!this.active){return}var d=$(this);var j=g.offsetX-this.current_x;var f=d.scrollTop()-(g.clientY-this.current_height);d.scrollTop(f);this.current_height=g.clientY;this.current_x=g.offsetX;var h=Math.round(j/a.viewport_container.width()*(a.high-a.low));a.move_delta(h)});this.top_labeltrack.bind("dragstart",function(d){this.drag_origin_x=d.clientX;this.drag_origin_pos=d.clientX/a.viewport_container.width()*(a.high-a.low)+a.low;this.drag_d
 iv=$("<div />").css({height:a.content_div.height()+30,top:"0px",position:"absolute","background-color":"#cfc",border:"1px solid #6a6",opacity:0.5,"z-index":1000}).appendTo($(this))}).bind("drag",function(j){var f=Math.min(j.clientX,this.drag_origin_x)-a.container.offset().left,d=Math.max(j.clientX,this.drag_origin_x)-a.container.offset().left,h=(a.high-a.low),g=a.viewport_container.width();a.update_location(Math.round(f/g*h)+a.low,Math.round(d/g*h)+a.low);this.drag_div.css({left:f+"px",width:(d-f)+"px"})}).bind("dragend",function(k){var f=Math.min(k.clientX,this.drag_origin_x),d=Math.max(k.clientX,this.drag_origin_x),h=(a.high-a.low),g=a.viewport_container.width(),j=a.low;a.low=Math.round(f/g*h)+j;a.high=Math.round(d/g*h)+j;this.drag_div.remove();a.redraw()});this.add_label_track(new LabelTrack(this,this.top_labeltrack));this.add_label_track(new LabelTrack(this,this.nav_labeltrack))},update_location:function(a,b){this.location_span.text(commatize(a)+" - "+commatize(b));this.
 nav_input.val(this.chrom+":"+commatize(a)+"-"+commatize(b))},change_chrom:function(d,a,f){var c=this;var e=$.grep(c.chrom_data,function(h,j){return h.chrom===d})[0];if(e===undefined){return}if(d!==c.chrom){c.chrom=d;if(c.chrom===""){c.intro_div.show();c.content_div.hide()}else{c.intro_div.hide();c.content_div.show()}c.chrom_select.val(c.chrom);c.max_high=e.len;c.reset();c.redraw(true);for(var g in c.tracks){var b=c.tracks[g];if(b.init){b.init()}}}if(a!==undefined&&f!==undefined){c.low=Math.max(a,0);c.high=Math.min(f,c.max_high)}c.overview_viewport.find("canvas").remove();c.redraw()},go_to:function(f){var k=this,b=f.split(":"),h=b[0],j=b[1];if(j!==undefined){try{var g=j.split("-"),a=parseInt(g[0].replace(/,/g,"")),d=parseInt(g[1].replace(/,/g,""))}catch(c){return false}}k.change_chrom(h,a,d)},move_delta:function(c){var a=this;var b=a.high-a.low;if(a.low-c<a.max_low){a.low=a.max_low;a.high=a.max_low+b}else{if(a.high-c>a.max_high){a.high=a.max_high;a.low=a.max_high-b}else{a.hig
 h-=c;a.low-=c}}a.redraw()},add_track:function(a){a.view=this;a.track_id=this.track_id_counter;this.tracks.push(a);if(a.init){a.init()}a.container_div.attr("id","track_"+a.track_id);this.track_id_counter+=1;this.num_tracks+=1},add_label_track:function(a){a.view=this;this.label_tracks.push(a)},remove_track:function(a){this.has_changes=true;a.container_div.fadeOut("slow",function(){$(this).remove()});delete this.tracks[this.tracks.indexOf(a)];this.num_tracks-=1},update_options:function(){this.has_changes=true;var b=$("ul#sortable-ul").sortable("toArray");for(var c in b){var e=b[c].split("_li")[0].split("track_")[1];this.viewport_container.append($("#track_"+e))}for(var d in view.tracks){var a=view.tracks[d];if(a&&a.update_options){a.update_options(d)}}},reset:function(){this.low=this.max_low;this.high=this.max_high;this.viewport_container.find(".yaxislabel").remove()},redraw:function(f){var d=this.high-this.low,b=this.low,e=this.high;if(b<this.max_low){b=this.max_low}if(e>this.
 max_high){e=this.max_high}if(this.high!==0&&d<this.min_separation){e=b+this.min_separation}this.low=Math.floor(b);this.high=Math.ceil(e);this.resolution=Math.pow(10,Math.ceil(Math.log((this.high-this.low)/200)/Math.LN10));this.zoom_res=Math.pow(FEATURE_LEVELS,Math.max(0,Math.ceil(Math.log(this.resolution,FEATURE_LEVELS)/Math.log(FEATURE_LEVELS))));this.overview_box.css({left:(this.low/(this.max_high-this.max_low))*this.overview_viewport.width(),width:Math.max(12,(this.high-this.low)/(this.max_high-this.max_low)*this.overview_viewport.width())}).show();this.update_location(this.low,this.high);if(!f){for(var c=0,a=this.tracks.length;c<a;c++){if(this.tracks[c]&&this.tracks[c].enabled){this.tracks[c].draw()}}for(var c=0,a=this.label_tracks.length;c<a;c++){this.label_tracks[c].draw()}}},zoom_in:function(b,c){if(this.max_high===0||this.high-this.low<this.min_separation){return}var d=this.high-this.low,e=d/2+this.low,a=(d/this.zoom_factor)/2;if(b){e=b/this.viewport_container.width(
 )*(this.high-this.low)+this.low}this.low=Math.round(e-a);this.high=Math.round(e+a);this.redraw()},zoom_out:function(){if(this.max_high===0){return}var b=this.high-this.low,c=b/2+this.low,a=(b*this.zoom_factor)/2;this.low=Math.round(c-a);this.high=Math.round(c+a);this.redraw()}});var Track=function(b,a,c){this.name=b;this.parent_element=c;this.view=a;this.init_global()};$.extend(Track.prototype,{init_global:function(){this.header_div=$("<div class='track-header'>").text(this.name);this.content_div=$("<div class='track-content'>");this.container_div=$("<div />").addClass("track").append(this.header_div).append(this.content_div);this.parent_element.append(this.container_div)},init_each:function(c,b){var a=this;a.enabled=false;a.data_queue={};a.tile_cache.clear();a.data_cache.clear();a.initial_canvas=undefined;a.content_div.css("height","auto");if(!a.content_div.text()){a.content_div.text(DATA_LOADING)}a.container_div.removeClass("nodata error pending");if(a.view.chrom){$.getJSO
 N(data_url,c,function(d){if(!d||d==="error"||d.kind==="error"){a.container_div.addClass("error");a.content_div.text(DATA_ERROR);if(d.message){var f=a.view.tracks.indexOf(a);var e=$("<a href='javascript:void(0);'></a>").attr("id",f+"_error");e.text("Click to view error");$("#"+f+"_error").live("click",function(){show_modal("Trackster Error","<pre>"+d.message+"</pre>",{Close:hide_modal})});a.content_div.append(e)}}else{if(d==="no converter"){a.container_div.addClass("error");a.content_div.text(DATA_NOCONVERTER)}else{if(d.data!==undefined&&(d.data===null||d.data.length===0)){a.container_div.addClass("nodata");a.content_div.text(DATA_NONE)}else{if(d==="pending"){a.container_div.addClass("pending");a.content_div.text(DATA_PENDING);setTimeout(function(){a.init()},5000)}else{a.content_div.text("");a.content_div.css("height",a.height_px+"px");a.enabled=true;b(d);a.draw()}}}}})}else{a.container_div.addClass("nodata");a.content_div.text(DATA_NONE)}}});var TiledTrack=function(){var c=t
 his,b=c.view;if(c.display_modes!==undefined){if(c.mode_div===undefined){c.mode_div=$("<div class='right-float menubutton popup' />").appendTo(c.header_div);var g=c.display_modes[0];c.mode=g;c.mode_div.text(g);var a=function(h){c.mode_div.text(h);c.mode=h;c.tile_cache.clear();c.draw()};var e={};for(var d in c.display_modes){var f=c.display_modes[d];e[f]=function(h){return function(){a(h)}}(f)}make_popupmenu(c.mode_div,e)}else{c.mode_div.hide()}}if(c.overview_check_div===undefined){c.overview_check_div=$("<div class='right-float' />").css("margin-top","-3px").appendTo(c.header_div);c.overview_check=$("<input type='checkbox' class='overview_check' />").appendTo(c.overview_check_div);c.overview_check.bind("click",function(){var h=this;b.overview_viewport.find("canvas").remove();c.set_overview();$(".overview_check").each(function(){if(this!==h){$(this).attr("checked",false)}})});c.overview_check_div.append($("<label />").text("Overview"))}};$.extend(TiledTrack.prototype,Track.pro
 totype,{draw:function(){var j=this.view.low,e=this.view.high,f=e-j,d=this.view.resolution;var l=$("<div style='position: relative;'></div>"),m=this.content_div.width()/f,h;this.content_div.children(":first").remove();this.content_div.append(l),this.max_height=0;var a=Math.floor(j/d/DENSITY);while((a*DENSITY*d)<e){var k=this.content_div.width()+"_"+m+"_"+a;var c=this.tile_cache.get(k);if(c){var g=a*DENSITY*d;var b=(g-j)*m;if(this.left_offset){b-=this.left_offset}c.css({left:b});l.append(c);this.max_height=Math.max(this.max_height,c.height());this.content_div.css("height",this.max_height+"px")}else{this.delayed_draw(this,k,j,e,a,d,l,m)}a+=1}},delayed_draw:function(c,e,a,f,b,d,g,h){setTimeout(function(){if(!(a>c.view.high||f<c.view.low)){tile_element=c.draw_tile(d,b,g,h);if(tile_element){if(!c.initial_canvas){c.initial_canvas=$(tile_element).clone();var l=tile_element.get(0).getContext("2d");var j=c.initial_canvas.get(0).getContext("2d");var k=l.getImageData(0,0,l.canvas.width,
 l.canvas.height);j.putImageData(k,0,0);c.set_overview()}c.tile_cache.set(e,tile_element);c.max_height=Math.max(c.max_height,tile_element.height());c.content_div.css("height",c.max_height+"px")}}},50)},set_overview:function(){var a=this.view;a.overview_viewport.height(a.default_overview_height);a.overview_box.height(a.default_overview_height);if(this.initial_canvas&&this.overview_check.is(":checked")){a.overview_viewport.append(this.initial_canvas);a.overview_viewport.height(this.initial_canvas.height());a.overview_box.height(this.initial_canvas.height())}$(window).trigger("resize")}});var LabelTrack=function(a,b){Track.call(this,null,a,b);this.track_type="LabelTrack";this.hidden=true;this.container_div.addClass("label-track")};$.extend(LabelTrack.prototype,Track.prototype,{draw:function(){var c=this.view,d=c.high-c.low,g=Math.floor(Math.pow(10,Math.floor(Math.log(d)/Math.log(10)))),a=Math.floor(c.low/g)*g,e=this.content_div.width(),b=$("<div style='position: relative; height
 : 1.3em;'></div>");while(a<c.high){var f=(a-c.low)/d*e;b.append($("<div class='label'>"+commatize(a)+"</div>").css({position:"absolute",left:f-1}));a+=g}this.content_div.children(":first").remove();this.content_div.append(b)}});var ReferenceTrack=function(a){this.track_type="ReferenceTrack";Track.call(this,null,a,a.top_labeltrack);TiledTrack.call(this);this.hidden=true;this.height_px=12;this.container_div.addClass("reference-track");this.dummy_canvas=$("<canvas></canvas>").get(0).getContext("2d");this.data_queue={};this.data_cache=new Cache(CACHED_DATA);this.tile_cache=new Cache(CACHED_TILES_LINE)};$.extend(ReferenceTrack.prototype,TiledTrack.prototype,{get_data:function(d,b){var c=this,a=b*DENSITY*d,f=(b+1)*DENSITY*d,e=d+"_"+b;if(!c.data_queue[e]){c.data_queue[e]=true;$.ajax({url:reference_url,dataType:"json",data:{chrom:this.view.chrom,low:a,high:f,dbkey:this.view.dbkey},success:function(g){c.data_cache.set(e,g);delete c.data_queue[e];c.draw()},error:function(h,g,j){consol
 e.log(h,g,j)}})}},draw_tile:function(f,b,k,o){var g=b*DENSITY*f,d=DENSITY*f,e=$("<canvas class='tile'></canvas>"),n=e.get(0).getContext("2d"),j=f+"_"+b;if(o>PX_PER_CHAR){if(this.data_cache.get(j)===undefined){this.get_data(f,b);return}var m=this.data_cache.get(j);if(m===null){this.content_div.css("height","0px");return}e.get(0).width=Math.ceil(d*o+this.left_offset);e.get(0).height=this.height_px;e.css({position:"absolute",top:0,left:(g-this.view.low)*o-this.left_offset});for(var h=0,l=m.length;h<l;h++){var a=Math.round(h*o);n.fillText(m[h],a+this.left_offset,10)}k.append(e);return e}this.content_div.css("height","0px")}});var LineTrack=function(d,b,a,c){this.track_type="LineTrack";this.display_modes=["Line","Filled","Intensity"];this.mode="Line";Track.call(this,d,b,b.viewport_container);TiledTrack.call(this);this.height_px=80;this.dataset_id=a;this.data_cache=new Cache(CACHED_DATA);this.tile_cache=new Cache(CACHED_TILES_LINE);this.prefs={min_value:undefined,max_value:undefin
 ed,mode:"Line"};if(c.min_value!==undefined){this.prefs.min_value=c.min_value}if(c.max_value!==undefined){this.prefs.max_value=c.max_value}};$.extend(LineTrack.prototype,TiledTrack.prototype,{init:function(){var a=this,b=a.view.tracks.indexOf(a);a.vertical_range=undefined;this.init_each({stats:true,chrom:a.view.chrom,low:null,high:null,dataset_id:a.dataset_id},function(c){a.container_div.addClass("line-track");data=c.data;if(isNaN(parseFloat(a.prefs.min_value))||isNaN(parseFloat(a.prefs.max_value))){a.prefs.min_value=data.min;a.prefs.max_value=data.max;$("#track_"+b+"_minval").val(a.prefs.min_value);$("#track_"+b+"_maxval").val(a.prefs.max_value)}a.vertical_range=a.prefs.max_value-a.prefs.min_value;a.total_frequency=data.total_frequency;$("#linetrack_"+b+"_minval").remove();$("#linetrack_"+b+"_maxval").remove();var e=$("<div />").addClass("yaxislabel").attr("id","linetrack_"+b+"_minval").text(round_1000(a.prefs.min_value));var d=$("<div />").addClass("yaxislabel").attr("id","
 linetrack_"+b+"_maxval").text(round_1000(a.prefs.max_value));d.css({position:"relative",top:"32px",left:"10px"});d.prependTo(a.container_div);e.css({position:"relative",top:a.height_px+32+"px",left:"10px"});e.prependTo(a.container_div)})},get_data:function(d,b){var c=this,a=b*DENSITY*d,f=(b+1)*DENSITY*d,e=d+"_"+b;if(!c.data_queue[e]){c.data_queue[e]=true;$.ajax({url:data_url,dataType:"json",data:{chrom:this.view.chrom,low:a,high:f,dataset_id:this.dataset_id,resolution:this.view.resolution},success:function(g){data=g.data;c.data_cache.set(e,data);delete c.data_queue[e];c.draw()},error:function(h,g,j){console.log(h,g,j)}})}},draw_tile:function(p,r,c,e){if(this.vertical_range===undefined){return}var s=r*DENSITY*p,a=DENSITY*p,b=$("<canvas class='tile'></canvas>"),v=p+"_"+r;if(this.data_cache.get(v)===undefined){this.get_data(p,r);return}var j=this.data_cache.get(v);if(j===null){return}b.css({position:"absolute",top:0,left:(s-this.view.low)*e});b.get(0).width=Math.ceil(a*e);b.get
 (0).height=this.height_px;var o=b.get(0).getContext("2d"),k=false,l=this.prefs.min_value,g=this.prefs.max_value,n=this.vertical_range,t=this.total_frequency,d=this.height_px,m=this.mode;o.beginPath();if(data.length>1){var f=Math.ceil((data[1][0]-data[0][0])*e)}else{var f=10}var u,h;for(var q=0;q<data.length;q++){u=(data[q][0]-s)*e;h=data[q][1];if(m=="Intensity"){if(h===null){continue}if(h<=l){h=l}else{if(h>=g){h=g}}h=255-Math.floor((h-l)/n*255);o.fillStyle="rgb("+h+","+h+","+h+")";o.fillRect(u,0,f,this.height_px)}else{if(h===null){if(k&&m==="Filled"){o.lineTo(u,d)}k=false;continue}else{if(h<=l){h=l}else{if(h>=g){h=g}}h=Math.round(d-(h-l)/n*d);if(k){o.lineTo(u,h)}else{k=true;if(m==="Filled"){o.moveTo(u,d);o.lineTo(u,h)}else{o.moveTo(u,h)}}}}}if(m==="Filled"){if(k){o.lineTo(u,d)}o.fill()}else{o.stroke()}c.append(b);return b},gen_options:function(k){var a=$("<div />").addClass("form-row");var e="track_"+k+"_minval",h=$("<label></label>").attr("for",e).text("Min value:"),b=(this
 .prefs.min_value===undefined?"":this.prefs.min_value),j=$("<input></input>").attr("id",e).val(b),g="track_"+k+"_maxval",d=$("<label></label>").attr("for",g).text("Max value:"),f=(this.prefs.max_value===undefined?"":this.prefs.max_value),c=$("<input></input>").attr("id",g).val(f);return a.append(h).append(j).append(d).append(c)},update_options:function(c){var a=$("#track_"+c+"_minval").val(),b=$("#track_"+c+"_maxval").val();if(a!==this.prefs.min_value||b!==this.prefs.max_value){this.prefs.min_value=parseFloat(a);this.prefs.max_value=parseFloat(b);this.vertical_range=this.prefs.max_value-this.prefs.min_value;$("#linetrack_"+c+"_minval").text(this.prefs.min_value);$("#linetrack_"+c+"_maxval").text(this.prefs.max_value);this.tile_cache.clear();this.draw()}}});var FeatureTrack=function(d,b,a,c){this.track_type="FeatureTrack";this.display_modes=["Auto","Dense","Squish","Pack"];Track.call(this,d,b,b.viewport_container);TiledTrack.call(this);this.height_px=0;this.container_div.addCl
 ass("feature-track");this.dataset_id=a;this.zo_slots={};this.show_labels_scale=0.001;this.showing_details=false;this.vertical_detail_px=10;this.vertical_nodetail_px=2;this.summary_draw_height=20;this.default_font="9px Monaco, Lucida Console, monospace";this.inc_slots={};this.data_queue={};this.s_e_by_tile={};this.tile_cache=new Cache(CACHED_TILES_FEATURE);this.data_cache=new Cache(20);this.left_offset=200;this.prefs={block_color:"black",label_color:"black",show_counts:true};if(c.block_color!==undefined){this.prefs.block_color=c.block_color}if(c.label_color!==undefined){this.prefs.label_color=c.label_color}if(c.show_counts!==undefined){this.prefs.show_counts=c.show_counts}};$.extend(FeatureTrack.prototype,TiledTrack.prototype,{init:function(){var a=this,b="initial";this.init_each({low:a.view.max_low,high:a.view.max_high,dataset_id:a.dataset_id,chrom:a.view.chrom,resolution:this.view.resolution},function(c){a.mode_div.show();a.data_cache.set(b,c);a.draw()})},get_data:function(
 a,d){var b=this,c=a+"_"+d;if(!b.data_queue[c]){b.data_queue[c]=true;$.getJSON(data_url,{chrom:b.view.chrom,low:a,high:d,dataset_id:b.dataset_id,resolution:this.view.resolution,mode:this.mode},function(e){b.data_cache.set(c,e);delete b.data_queue[c];b.draw()})}},incremental_slots:function(a,h,c,r){if(!this.inc_slots[a]){this.inc_slots[a]={};this.inc_slots[a].w_scale=1/a;this.inc_slots[a].mode=r;this.s_e_by_tile[a]={}}var n=this.inc_slots[a].w_scale,z=[],l=0,b=$("<canvas></canvas>").get(0).getContext("2d"),o=this.view.max_low;var B=[];if(this.inc_slots[a].mode!==r){delete this.inc_slots[a];this.inc_slots[a]={mode:r,w_scale:n};delete this.s_e_by_tile[a];this.s_e_by_tile[a]={}}for(var w=0,x=h.length;w<x;w++){var g=h[w],m=g[0];if(this.inc_slots[a][m]!==undefined){l=Math.max(l,this.inc_slots[a][m]);B.push(this.inc_slots[a][m])}else{z.push(w)}}for(var w=0,x=z.length;w<x;w++){var g=h[z[w]],m=g[0],s=g[1],d=g[2],q=g[3],e=Math.floor((s-o)*n),f=Math.ceil((d-o)*n);if(q!==undefined&&!c){v
 ar t=b.measureText(q).width;if(e-t<0){f+=t}else{e-=t}}var v=0;while(true){var p=true;if(this.s_e_by_tile[a][v]!==undefined){for(var u=0,A=this.s_e_by_tile[a][v].length;u<A;u++){var y=this.s_e_by_tile[a][v][u];if(f>y[0]&&e<y[1]){p=false;break}}}if(p){if(this.s_e_by_tile[a][v]===undefined){this.s_e_by_tile[a][v]=[]}this.s_e_by_tile[a][v].push([e,f]);this.inc_slots[a][m]=v;l=Math.max(l,v);break}v++}}return l},rect_or_text:function(n,o,f,m,b,d,k,e,h){n.textAlign="center";var j=Math.round(o/2);if((this.mode==="Pack"||this.mode==="Auto")&&d!==undefined&&o>PX_PER_CHAR){n.fillStyle=this.prefs.block_color;n.fillRect(k,h+1,e,9);n.fillStyle="#eee";for(var g=0,l=d.length;g<l;g++){if(b+g>=f&&b+g<=m){var a=Math.floor(Math.max(0,(b+g-f)*o));n.fillText(d[g],a+this.left_offset+j,h+9)}}}else{n.fillStyle=this.prefs.block_color;n.fillRect(k,h+4,e,3)}},draw_tile:function(Y,l,o,al){var F=l*DENSITY*Y,ae=(l+1)*DENSITY*Y,E=ae-F;var af=(!this.initial_canvas?"initial":F+"_"+ae);var A=this.data_cache.g
 et(af);var d;if(A===undefined){this.data_queue[[F,ae]]=true;this.get_data(F,ae);return}var a=Math.ceil(E*al),M=$("<canvas class='tile'></canvas>"),aa=this.prefs.label_color,g=this.prefs.block_color,n=this.mode,W=(n==="Squish")||(n==="Dense")&&(n!=="Pack")||(n==="Auto"&&(A.extra_info==="no_detail")),Q=this.left_offset,ak,t,am;if(A.dataset_type==="summary_tree"){t=this.summary_draw_height}else{if(n==="Dense"){t=15;am=10}else{am=(W?this.vertical_nodetail_px:this.vertical_detail_px);t=this.incremental_slots(this.view.zoom_res,A.data,W,n)*am+15;ak=this.inc_slots[this.view.zoom_res]}}M.css({position:"absolute",top:0,left:(F-this.view.low)*al-Q});M.get(0).width=a+Q;M.get(0).height=t;o.parent().css("height",Math.max(this.height_px,t)+"px");var B=M.get(0).getContext("2d");B.fillStyle=g;B.font=this.default_font;B.textAlign="right";if(A.dataset_type=="summary_tree"){var L,I=55,ad=255-I,h=ad*2/3,S=A.data,D=A.max,m=A.avg,b=Math.ceil(A.delta*al);for(var ah=0,z=S.length;ah<z;ah++){var U=Ma
 th.floor((S[ah][0]-F)*al);var T=S[ah][1];if(!T){continue}L=Math.floor(ad-(T/D)*ad);B.fillStyle="rgb("+L+","+L+","+L+")";B.fillRect(U+Q,0,b,this.summary_draw_height);if(this.prefs.show_counts&&B.measureText(T).width<b){if(L>h){B.fillStyle="black"}else{B.fillStyle="#ddd"}B.textAlign="center";B.fillText(T,U+Q+(b/2),12)}}d="Summary";o.append(M);return M}var aj=A.data;var ag=0;for(var ah=0,z=aj.length;ah<z;ah++){var N=aj[ah],K=N[0],ai=N[1],V=N[2],G=N[3];if(ai<=ae&&V>=F){var X=Math.floor(Math.max(0,(ai-F)*al)),C=Math.ceil(Math.min(a,Math.max(0,(V-F)*al))),R=(n==="Dense"?0:ak[K]*am);if(A.dataset_type==="bai"){B.fillStyle=g;if(N[4] instanceof Array){var u=Math.floor(Math.max(0,(N[4][0]-F)*al)),J=Math.ceil(Math.min(a,Math.max(0,(N[4][1]-F)*al))),s=Math.floor(Math.max(0,(N[5][0]-F)*al)),q=Math.ceil(Math.min(a,Math.max(0,(N[5][1]-F)*al)));if(N[4][1]>=F&&N[4][0]<=ae){this.rect_or_text(B,al,F,ae,N[4][0],N[4][2],u+Q,J-u,R)}if(N[5][1]>=F&&N[5][0]<=ae){this.rect_or_text(B,al,F,ae,N[5][0],N[
 5][2],s+Q,q-s,R)}if(s>J){B.fillStyle="#999";B.fillRect(J+Q,R+5,s-J,1)}}else{B.fillStyle=g;this.rect_or_text(B,al,F,ae,ai,G,X+Q,C-X,R)}if(n!=="Dense"&&!W&&ai>F){B.fillStyle=this.prefs.label_color;if(l===0&&X-B.measureText(G).width<0){B.textAlign="left";B.fillText(K,C+2+Q,R+8)}else{B.textAlign="right";B.fillText(K,X-2+Q,R+8)}B.fillStyle=g}}else{if(A.dataset_type==="interval_index"){if(W){B.fillRect(X+Q,R+5,C-X,1)}else{var w=N[4],P=N[5],Z=N[6],f=N[7];var v,ab,H=null,an=null;if(P&&Z){H=Math.floor(Math.max(0,(P-F)*al));an=Math.ceil(Math.min(a,Math.max(0,(Z-F)*al)))}if(n!=="Dense"&&G!==undefined&&ai>F){B.fillStyle=aa;if(l===0&&X-B.measureText(G).width<0){B.textAlign="left";B.fillText(G,C+2+Q,R+8)}else{B.textAlign="right";B.fillText(G,X-2+Q,R+8)}B.fillStyle=g}if(f){if(w){if(w=="+"){B.fillStyle=RIGHT_STRAND}else{if(w=="-"){B.fillStyle=LEFT_STRAND}}B.fillRect(X+Q,R,C-X,10);B.fillStyle=g}for(var af=0,e=f.length;af<e;af++){var p=f[af],c=Math.floor(Math.max(0,(p[0]-F)*al)),O=Math.ceil(M
 ath.min(a,Math.max((p[1]-F)*al)));if(c>O){continue}v=5;ab=3;B.fillRect(c+Q,R+ab,O-c,v);if(H!==undefined&&!(c>an||O<H)){v=9;ab=1;var ac=Math.max(c,H),r=Math.min(O,an);B.fillRect(ac+Q,R+ab,r-ac,v)}}}else{v=9;ab=1;B.fillRect(X+Q,R+ab,C-X,v);if(N.strand){if(N.strand=="+"){B.fillStyle=RIGHT_STRAND_INV}else{if(N.strand=="-"){B.fillStyle=LEFT_STRAND_INV}}B.fillRect(X+Q,R,C-X,10);B.fillStyle=prefs.block_color}}}}}ag++}}o.append(M);return M},gen_options:function(j){var a=$("<div />").addClass("form-row");var e="track_"+j+"_block_color",l=$("<label />").attr("for",e).text("Block color:"),m=$("<input />").attr("id",e).attr("name",e).val(this.prefs.block_color),k="track_"+j+"_label_color",g=$("<label />").attr("for",k).text("Text color:"),h=$("<input />").attr("id",k).attr("name",k).val(this.prefs.label_color),f="track_"+j+"_show_count",c=$("<label />").attr("for",f).text("Show summary counts"),b=$('<input type="checkbox" style="float:left;"></input>').attr("id",f).attr("name",f).attr("
 checked",this.prefs.show_counts),d=$("<div />").append(b).append(c);return a.append(l).append(m).append(g).append(h).append(d)},update_options:function(e){var b=$("#track_"+e+"_block_color").val(),d=$("#track_"+e+"_label_color").val(),c=$("#track_"+e+"_mode option:selected").val(),a=$("#track_"+e+"_show_count").attr("checked");if(b!==this.prefs.block_color||d!==this.prefs.label_color||a!==this.prefs.show_counts){this.prefs.block_color=b;this.prefs.label_color=d;this.prefs.show_counts=a;this.tile_cache.clear();this.draw()}}});var ReadTrack=function(d,b,a,c){FeatureTrack.call(this,d,b,a,c);this.track_type="ReadTrack";this.vertical_detail_px=10;this.vertical_nodetail_px=5};$.extend(ReadTrack.prototype,TiledTrack.prototype,FeatureTrack.prototype,{});
+var DENSITY=200,FEATURE_LEVELS=10,DATA_ERROR="There was an error in indexing this dataset. ",DATA_NOCONVERTER="A converter for this dataset is not installed. Please check your datatypes_conf.xml file.",DATA_NONE="No data for this chrom/contig.",DATA_PENDING="Currently indexing... please wait",DATA_LOADING="Loading data...",CACHED_TILES_FEATURE=10,CACHED_TILES_LINE=30,CACHED_DATA=5,CONTEXT=$("<canvas></canvas>").get(0).getContext("2d"),PX_PER_CHAR=CONTEXT.measureText("A").width,RIGHT_STRAND,LEFT_STRAND;var right_img=new Image();right_img.src=image_path+"/visualization/strand_right.png";right_img.onload=function(){RIGHT_STRAND=CONTEXT.createPattern(right_img,"repeat")};var left_img=new Image();left_img.src=image_path+"/visualization/strand_left.png";left_img.onload=function(){LEFT_STRAND=CONTEXT.createPattern(left_img,"repeat")};var right_img_inv=new Image();right_img_inv.src=image_path+"/visualization/strand_right_inv.png";right_img_inv.onload=function(){RIGHT_STRAND_INV=CONT
 EXT.createPattern(right_img_inv,"repeat")};var left_img_inv=new Image();left_img_inv.src=image_path+"/visualization/strand_left_inv.png";left_img_inv.onload=function(){LEFT_STRAND_INV=CONTEXT.createPattern(left_img_inv,"repeat")};function round_1000(a){return Math.round(a*1000)/1000}var Cache=function(a){this.num_elements=a;this.clear()};$.extend(Cache.prototype,{get:function(b){var a=this.key_ary.indexOf(b);if(a!=-1){this.key_ary.splice(a,1);this.key_ary.push(b)}return this.obj_cache[b]},set:function(b,c){if(!this.obj_cache[b]){if(this.key_ary.length>=this.num_elements){var a=this.key_ary.shift();delete this.obj_cache[a]}this.key_ary.push(b)}this.obj_cache[b]=c;return c},clear:function(){this.obj_cache={};this.key_ary=[]}});var View=function(a,c,e,d,b){this.container=a;this.vis_id=d;this.dbkey=b;this.title=e;this.chrom=c;this.tracks=[];this.label_tracks=[];this.max_low=0;this.max_high=0;this.num_tracks=0;this.track_id_counter=0;this.zoom_factor=3;this.min_separation=30;this
 .has_changes=false;this.init();this.reset()};$.extend(View.prototype,{init:function(){var c=this.container,a=this;this.top_labeltrack=$("<div/>").addClass("top-labeltrack").appendTo(c);this.content_div=$("<div/>").addClass("content").css("position","relative").appendTo(c);this.intro_div=$("<div/>").addClass("intro").text("Select a chrom from the dropdown below").hide().appendTo(c);this.viewport_container=$("<div/>").addClass("viewport-container").addClass("viewport-container").appendTo(this.content_div);this.nav_container=$("<div/>").addClass("nav-container").appendTo(c);this.nav_labeltrack=$("<div/>").addClass("nav-labeltrack").appendTo(this.nav_container);this.nav=$("<div/>").addClass("nav").appendTo(this.nav_container);this.overview=$("<div/>").addClass("overview").appendTo(this.nav);this.overview_viewport=$("<div/>").addClass("overview-viewport").appendTo(this.overview);this.overview_box=$("<div/>").addClass("overview-box").appendTo(this.overview_viewport);this.default_o
 verview_height=this.overview_box.height();this.nav_controls=$("<div/>").addClass("nav-controls").appendTo(this.nav);this.chrom_form=$("<form/>").attr("action",function(){void (0)}).appendTo(this.nav_controls);this.chrom_select=$("<select/>").attr({name:"chrom"}).css("width","15em").addClass("no-autocomplete").append("<option value=''>Loading</option>").appendTo(this.chrom_form);var b=function(d){if(d.type==="focusout"||(d.keyCode||d.which)===13||(d.keyCode||d.which)===27){if((d.keyCode||d.which)!==27){a.go_to($(this).val())}$(this).hide();a.location_span.show();a.chrom_select.show();return false}};this.nav_input=$("<input/>").addClass("nav-input").hide().bind("keypress focusout",b).appendTo(this.chrom_form);this.location_span=$("<span/>").addClass("location").appendTo(this.chrom_form);this.location_span.bind("click",function(){a.location_span.hide();a.chrom_select.hide();a.nav_input.css("display","inline-block");a.nav_input.focus()});if(this.vis_id!==undefined){this.hidden_i
 nput=$("<input/>").attr("type","hidden").val(this.vis_id).appendTo(this.chrom_form)}this.zo_link=$("<a/>").click(function(){a.zoom_out();a.redraw()}).html('<img src="'+image_path+'/fugue/magnifier-zoom-out.png" />').appendTo(this.chrom_form);this.zi_link=$("<a/>").click(function(){a.zoom_in();a.redraw()}).html('<img src="'+image_path+'/fugue/magnifier-zoom.png" />').appendTo(this.chrom_form);$.ajax({url:chrom_url,data:(this.vis_id!==undefined?{vis_id:this.vis_id}:{dbkey:this.dbkey}),dataType:"json",success:function(d){if(d.reference){a.add_label_track(new ReferenceTrack(a))}a.chrom_data=d.chrom_info;var f='<option value="">Select Chrom/Contig</option>';for(i in a.chrom_data){var e=a.chrom_data[i]["chrom"];f+='<option value="'+e+'">'+e+"</option>"}a.chrom_select.html(f);a.intro_div.show();a.content_div.hide();a.chrom_select.bind("change",function(){a.change_chrom(a.chrom_select.val())})},error:function(){alert("Could not load chroms for this dbkey:",a.dbkey)}});this.content_d
 iv.bind("dblclick",function(d){a.zoom_in(d.pageX,this.viewport_container)});this.overview_box.bind("dragstart",function(d){this.current_x=d.offsetX}).bind("drag",function(d){var g=d.offsetX-this.current_x;this.current_x=d.offsetX;var f=Math.round(g/a.viewport_container.width()*(a.max_high-a.max_low));a.move_delta(-f)});this.viewport_container.bind("dragstart",function(d){this.original_low=a.low;this.current_height=d.clientY;this.current_x=d.offsetX;this.active=(d.clientX<a.viewport_container.width()-16)?true:false}).bind("drag",function(g){if(!this.active){return}var d=$(this);var j=g.offsetX-this.current_x;var f=d.scrollTop()-(g.clientY-this.current_height);d.scrollTop(f);this.current_height=g.clientY;this.current_x=g.offsetX;var h=Math.round(j/a.viewport_container.width()*(a.high-a.low));a.move_delta(h)});this.top_labeltrack.bind("dragstart",function(d){this.drag_origin_x=d.clientX;this.drag_origin_pos=d.clientX/a.viewport_container.width()*(a.high-a.low)+a.low;this.drag_d
 iv=$("<div />").css({height:a.content_div.height()+30,top:"0px",position:"absolute","background-color":"#cfc",border:"1px solid #6a6",opacity:0.5,"z-index":1000}).appendTo($(this))}).bind("drag",function(j){var f=Math.min(j.clientX,this.drag_origin_x)-a.container.offset().left,d=Math.max(j.clientX,this.drag_origin_x)-a.container.offset().left,h=(a.high-a.low),g=a.viewport_container.width();a.update_location(Math.round(f/g*h)+a.low,Math.round(d/g*h)+a.low);this.drag_div.css({left:f+"px",width:(d-f)+"px"})}).bind("dragend",function(k){var f=Math.min(k.clientX,this.drag_origin_x),d=Math.max(k.clientX,this.drag_origin_x),h=(a.high-a.low),g=a.viewport_container.width(),j=a.low;a.low=Math.round(f/g*h)+j;a.high=Math.round(d/g*h)+j;this.drag_div.remove();a.redraw()});this.add_label_track(new LabelTrack(this,this.top_labeltrack));this.add_label_track(new LabelTrack(this,this.nav_labeltrack))},update_location:function(a,b){this.location_span.text(commatize(a)+" - "+commatize(b));this.
 nav_input.val(this.chrom+":"+commatize(a)+"-"+commatize(b))},change_chrom:function(d,a,f){var c=this;var e=$.grep(c.chrom_data,function(h,j){return h.chrom===d})[0];if(e===undefined){return}if(d!==c.chrom){c.chrom=d;if(c.chrom===""){c.intro_div.show();c.content_div.hide()}else{c.intro_div.hide();c.content_div.show()}c.chrom_select.val(c.chrom);c.max_high=e.len;c.reset();c.redraw(true);for(var g in c.tracks){var b=c.tracks[g];if(b.init){b.init()}}}if(a!==undefined&&f!==undefined){c.low=Math.max(a,0);c.high=Math.min(f,c.max_high)}c.overview_viewport.find("canvas").remove();c.redraw()},go_to:function(f){var k=this,b=f.split(":"),h=b[0],j=b[1];if(j!==undefined){try{var g=j.split("-"),a=parseInt(g[0].replace(/,/g,"")),d=parseInt(g[1].replace(/,/g,""))}catch(c){return false}}k.change_chrom(h,a,d)},move_delta:function(c){var a=this;var b=a.high-a.low;if(a.low-c<a.max_low){a.low=a.max_low;a.high=a.max_low+b}else{if(a.high-c>a.max_high){a.high=a.max_high;a.low=a.max_high-b}else{a.hig
 h-=c;a.low-=c}}a.redraw()},add_track:function(a){a.view=this;a.track_id=this.track_id_counter;this.tracks.push(a);if(a.init){a.init()}a.container_div.attr("id","track_"+a.track_id);this.track_id_counter+=1;this.num_tracks+=1},add_label_track:function(a){a.view=this;this.label_tracks.push(a)},remove_track:function(a){this.has_changes=true;a.container_div.fadeOut("slow",function(){$(this).remove()});delete this.tracks[this.tracks.indexOf(a)];this.num_tracks-=1},update_options:function(){this.has_changes=true;var b=$("ul#sortable-ul").sortable("toArray");for(var c in b){var e=b[c].split("_li")[0].split("track_")[1];this.viewport_container.append($("#track_"+e))}for(var d in view.tracks){var a=view.tracks[d];if(a&&a.update_options){a.update_options(d)}}},reset:function(){this.low=this.max_low;this.high=this.max_high;this.viewport_container.find(".yaxislabel").remove()},redraw:function(f){var d=this.high-this.low,b=this.low,e=this.high;if(b<this.max_low){b=this.max_low}if(e>this.
 max_high){e=this.max_high}if(this.high!==0&&d<this.min_separation){e=b+this.min_separation}this.low=Math.floor(b);this.high=Math.ceil(e);this.resolution=Math.pow(10,Math.ceil(Math.log((this.high-this.low)/200)/Math.LN10));this.zoom_res=Math.pow(FEATURE_LEVELS,Math.max(0,Math.ceil(Math.log(this.resolution,FEATURE_LEVELS)/Math.log(FEATURE_LEVELS))));this.overview_box.css({left:(this.low/(this.max_high-this.max_low))*this.overview_viewport.width(),width:Math.max(12,(this.high-this.low)/(this.max_high-this.max_low)*this.overview_viewport.width())}).show();this.update_location(this.low,this.high);if(!f){for(var c=0,a=this.tracks.length;c<a;c++){if(this.tracks[c]&&this.tracks[c].enabled){this.tracks[c].draw()}}for(var c=0,a=this.label_tracks.length;c<a;c++){this.label_tracks[c].draw()}}},zoom_in:function(b,c){if(this.max_high===0||this.high-this.low<this.min_separation){return}var d=this.high-this.low,e=d/2+this.low,a=(d/this.zoom_factor)/2;if(b){e=b/this.viewport_container.width(
 )*(this.high-this.low)+this.low}this.low=Math.round(e-a);this.high=Math.round(e+a);this.redraw()},zoom_out:function(){if(this.max_high===0){return}var b=this.high-this.low,c=b/2+this.low,a=(b*this.zoom_factor)/2;this.low=Math.round(c-a);this.high=Math.round(c+a);this.redraw()}});var Track=function(b,a,c){this.name=b;this.parent_element=c;this.view=a;this.init_global()};$.extend(Track.prototype,{init_global:function(){this.header_div=$("<div class='track-header'>").text(this.name);this.content_div=$("<div class='track-content'>");this.container_div=$("<div />").addClass("track").append(this.header_div).append(this.content_div);this.parent_element.append(this.container_div)},init_each:function(c,b){var a=this;a.enabled=false;a.data_queue={};a.tile_cache.clear();a.data_cache.clear();a.initial_canvas=undefined;a.content_div.css("height","auto");if(!a.content_div.text()){a.content_div.text(DATA_LOADING)}a.container_div.removeClass("nodata error pending");if(a.view.chrom){$.getJSO
 N(data_url,c,function(d){if(!d||d==="error"||d.kind==="error"){a.container_div.addClass("error");a.content_div.text(DATA_ERROR);if(d.message){var f=a.view.tracks.indexOf(a);var e=$("<a href='javascript:void(0);'></a>").attr("id",f+"_error");e.text("Click to view error");$("#"+f+"_error").live("click",function(){show_modal("Trackster Error","<pre>"+d.message+"</pre>",{Close:hide_modal})});a.content_div.append(e)}}else{if(d==="no converter"){a.container_div.addClass("error");a.content_div.text(DATA_NOCONVERTER)}else{if(d.data!==undefined&&(d.data===null||d.data.length===0)){a.container_div.addClass("nodata");a.content_div.text(DATA_NONE)}else{if(d==="pending"){a.container_div.addClass("pending");a.content_div.text(DATA_PENDING);setTimeout(function(){a.init()},5000)}else{a.content_div.text("");a.content_div.css("height",a.height_px+"px");a.enabled=true;b(d);a.draw()}}}}})}else{a.container_div.addClass("nodata");a.content_div.text(DATA_NONE)}}});var TiledTrack=function(){var c=t
 his,b=c.view;if(c.display_modes!==undefined){if(c.mode_div===undefined){c.mode_div=$("<div class='right-float menubutton popup' />").appendTo(c.header_div);var g=c.display_modes[0];c.mode=g;c.mode_div.text(g);var a=function(h){c.mode_div.text(h);c.mode=h;c.tile_cache.clear();c.draw()};var e={};for(var d in c.display_modes){var f=c.display_modes[d];e[f]=function(h){return function(){a(h)}}(f)}make_popupmenu(c.mode_div,e)}else{c.mode_div.hide()}}if(c.overview_check_div===undefined){c.overview_check_div=$("<div class='right-float' />").css("margin-top","-3px").appendTo(c.header_div);c.overview_check=$("<input type='checkbox' class='overview_check' />").appendTo(c.overview_check_div);c.overview_check.bind("click",function(){var h=this;b.overview_viewport.find("canvas").remove();c.set_overview();$(".overview_check").each(function(){if(this!==h){$(this).attr("checked",false)}})});c.overview_check_div.append($("<label />").text("Overview"))}};$.extend(TiledTrack.prototype,Track.pro
 totype,{draw:function(){var j=this.view.low,e=this.view.high,f=e-j,d=this.view.resolution;var l=$("<div style='position: relative;'></div>"),m=this.content_div.width()/f,h;this.content_div.children(":first").remove();this.content_div.append(l),this.max_height=0;var a=Math.floor(j/d/DENSITY);while((a*DENSITY*d)<e){var k=this.content_div.width()+"_"+m+"_"+a;var c=this.tile_cache.get(k);if(c){var g=a*DENSITY*d;var b=(g-j)*m;if(this.left_offset){b-=this.left_offset}c.css({left:b});l.append(c);this.max_height=Math.max(this.max_height,c.height());this.content_div.css("height",this.max_height+"px")}else{this.delayed_draw(this,k,j,e,a,d,l,m)}a+=1}},delayed_draw:function(c,e,a,f,b,d,g,h){setTimeout(function(){if(!(a>c.view.high||f<c.view.low)){tile_element=c.draw_tile(d,b,g,h);if(tile_element){if(!c.initial_canvas){c.initial_canvas=$(tile_element).clone();var l=tile_element.get(0).getContext("2d");var j=c.initial_canvas.get(0).getContext("2d");var k=l.getImageData(0,0,l.canvas.width,
 l.canvas.height);j.putImageData(k,0,0);c.set_overview()}c.tile_cache.set(e,tile_element);c.max_height=Math.max(c.max_height,tile_element.height());c.content_div.css("height",c.max_height+"px")}}},50)},set_overview:function(){var a=this.view;a.overview_viewport.height(a.default_overview_height);a.overview_box.height(a.default_overview_height);if(this.initial_canvas&&this.overview_check.is(":checked")){a.overview_viewport.append(this.initial_canvas);a.overview_viewport.height(this.initial_canvas.height());a.overview_box.height(this.initial_canvas.height())}$(window).trigger("resize")}});var LabelTrack=function(a,b){Track.call(this,null,a,b);this.track_type="LabelTrack";this.hidden=true;this.container_div.addClass("label-track")};$.extend(LabelTrack.prototype,Track.prototype,{draw:function(){var c=this.view,d=c.high-c.low,g=Math.floor(Math.pow(10,Math.floor(Math.log(d)/Math.log(10)))),a=Math.floor(c.low/g)*g,e=this.content_div.width(),b=$("<div style='position: relative; height
 : 1.3em;'></div>");while(a<c.high){var f=(a-c.low)/d*e;b.append($("<div class='label'>"+commatize(a)+"</div>").css({position:"absolute",left:f-1}));a+=g}this.content_div.children(":first").remove();this.content_div.append(b)}});var ReferenceTrack=function(a){this.track_type="ReferenceTrack";Track.call(this,null,a,a.top_labeltrack);TiledTrack.call(this);this.hidden=true;this.height_px=12;this.container_div.addClass("reference-track");this.dummy_canvas=$("<canvas></canvas>").get(0).getContext("2d");this.data_queue={};this.data_cache=new Cache(CACHED_DATA);this.tile_cache=new Cache(CACHED_TILES_LINE)};$.extend(ReferenceTrack.prototype,TiledTrack.prototype,{get_data:function(d,b){var c=this,a=b*DENSITY*d,f=(b+1)*DENSITY*d,e=d+"_"+b;if(!c.data_queue[e]){c.data_queue[e]=true;$.ajax({url:reference_url,dataType:"json",data:{chrom:this.view.chrom,low:a,high:f,dbkey:this.view.dbkey},success:function(g){c.data_cache.set(e,g);delete c.data_queue[e];c.draw()},error:function(h,g,j){consol
 e.log(h,g,j)}})}},draw_tile:function(f,b,k,o){var g=b*DENSITY*f,d=DENSITY*f,e=$("<canvas class='tile'></canvas>"),n=e.get(0).getContext("2d"),j=f+"_"+b;if(o>PX_PER_CHAR){if(this.data_cache.get(j)===undefined){this.get_data(f,b);return}var m=this.data_cache.get(j);if(m===null){this.content_div.css("height","0px");return}e.get(0).width=Math.ceil(d*o+this.left_offset);e.get(0).height=this.height_px;e.css({position:"absolute",top:0,left:(g-this.view.low)*o-this.left_offset});for(var h=0,l=m.length;h<l;h++){var a=Math.round(h*o);n.fillText(m[h],a+this.left_offset,10)}k.append(e);return e}this.content_div.css("height","0px")}});var LineTrack=function(d,b,a,c){this.track_type="LineTrack";this.display_modes=["Line","Filled","Intensity"];this.mode="Line";Track.call(this,d,b,b.viewport_container);TiledTrack.call(this);this.height_px=80;this.dataset_id=a;this.data_cache=new Cache(CACHED_DATA);this.tile_cache=new Cache(CACHED_TILES_LINE);this.prefs={min_value:undefined,max_value:undefin
 ed,mode:"Line"};if(c.min_value!==undefined){this.prefs.min_value=c.min_value}if(c.max_value!==undefined){this.prefs.max_value=c.max_value}};$.extend(LineTrack.prototype,TiledTrack.prototype,{init:function(){var a=this,b=a.view.tracks.indexOf(a);a.vertical_range=undefined;this.init_each({stats:true,chrom:a.view.chrom,low:null,high:null,dataset_id:a.dataset_id},function(c){a.container_div.addClass("line-track");data=c.data;if(isNaN(parseFloat(a.prefs.min_value))||isNaN(parseFloat(a.prefs.max_value))){a.prefs.min_value=data.min;a.prefs.max_value=data.max;$("#track_"+b+"_minval").val(a.prefs.min_value);$("#track_"+b+"_maxval").val(a.prefs.max_value)}a.vertical_range=a.prefs.max_value-a.prefs.min_value;a.total_frequency=data.total_frequency;$("#linetrack_"+b+"_minval").remove();$("#linetrack_"+b+"_maxval").remove();var e=$("<div />").addClass("yaxislabel").attr("id","linetrack_"+b+"_minval").text(round_1000(a.prefs.min_value));var d=$("<div />").addClass("yaxislabel").attr("id","
 linetrack_"+b+"_maxval").text(round_1000(a.prefs.max_value));d.css({position:"relative",top:"32px",left:"10px"});d.prependTo(a.container_div);e.css({position:"relative",top:a.height_px+32+"px",left:"10px"});e.prependTo(a.container_div)})},get_data:function(d,b){var c=this,a=b*DENSITY*d,f=(b+1)*DENSITY*d,e=d+"_"+b;if(!c.data_queue[e]){c.data_queue[e]=true;$.ajax({url:data_url,dataType:"json",data:{chrom:this.view.chrom,low:a,high:f,dataset_id:this.dataset_id,resolution:this.view.resolution},success:function(g){data=g.data;c.data_cache.set(e,data);delete c.data_queue[e];c.draw()},error:function(h,g,j){console.log(h,g,j)}})}},draw_tile:function(p,r,c,e){if(this.vertical_range===undefined){return}var s=r*DENSITY*p,a=DENSITY*p,b=$("<canvas class='tile'></canvas>"),v=p+"_"+r;if(this.data_cache.get(v)===undefined){this.get_data(p,r);return}var j=this.data_cache.get(v);if(j===null){return}b.css({position:"absolute",top:0,left:(s-this.view.low)*e});b.get(0).width=Math.ceil(a*e);b.get
 (0).height=this.height_px;var o=b.get(0).getContext("2d"),k=false,l=this.prefs.min_value,g=this.prefs.max_value,n=this.vertical_range,t=this.total_frequency,d=this.height_px,m=this.mode;o.beginPath();if(data.length>1){var f=Math.ceil((data[1][0]-data[0][0])*e)}else{var f=10}var u,h;for(var q=0;q<data.length;q++){u=(data[q][0]-s)*e;h=data[q][1];if(m=="Intensity"){if(h===null){continue}if(h<=l){h=l}else{if(h>=g){h=g}}h=255-Math.floor((h-l)/n*255);o.fillStyle="rgb("+h+","+h+","+h+")";o.fillRect(u,0,f,this.height_px)}else{if(h===null){if(k&&m==="Filled"){o.lineTo(u,d)}k=false;continue}else{if(h<=l){h=l}else{if(h>=g){h=g}}h=Math.round(d-(h-l)/n*d);if(k){o.lineTo(u,h)}else{k=true;if(m==="Filled"){o.moveTo(u,d);o.lineTo(u,h)}else{o.moveTo(u,h)}}}}}if(m==="Filled"){if(k){o.lineTo(u,d)}o.fill()}else{o.stroke()}c.append(b);return b},gen_options:function(k){var a=$("<div />").addClass("form-row");var e="track_"+k+"_minval",h=$("<label></label>").attr("for",e).text("Min value:"),b=(this
 .prefs.min_value===undefined?"":this.prefs.min_value),j=$("<input></input>").attr("id",e).val(b),g="track_"+k+"_maxval",d=$("<label></label>").attr("for",g).text("Max value:"),f=(this.prefs.max_value===undefined?"":this.prefs.max_value),c=$("<input></input>").attr("id",g).val(f);return a.append(h).append(j).append(d).append(c)},update_options:function(c){var a=$("#track_"+c+"_minval").val(),b=$("#track_"+c+"_maxval").val();if(a!==this.prefs.min_value||b!==this.prefs.max_value){this.prefs.min_value=parseFloat(a);this.prefs.max_value=parseFloat(b);this.vertical_range=this.prefs.max_value-this.prefs.min_value;$("#linetrack_"+c+"_minval").text(this.prefs.min_value);$("#linetrack_"+c+"_maxval").text(this.prefs.max_value);this.tile_cache.clear();this.draw()}}});var FeatureTrack=function(d,b,a,c){this.track_type="FeatureTrack";this.display_modes=["Auto","Dense","Squish","Pack"];Track.call(this,d,b,b.viewport_container);TiledTrack.call(this);this.height_px=0;this.container_div.addCl
 ass("feature-track");this.dataset_id=a;this.zo_slots={};this.show_labels_scale=0.001;this.showing_details=false;this.vertical_detail_px=10;this.vertical_nodetail_px=2;this.summary_draw_height=20;this.default_font="9px Monaco, Lucida Console, monospace";this.inc_slots={};this.data_queue={};this.s_e_by_tile={};this.tile_cache=new Cache(CACHED_TILES_FEATURE);this.data_cache=new Cache(20);this.left_offset=200;this.prefs={block_color:"black",label_color:"black",show_counts:true};if(c.block_color!==undefined){this.prefs.block_color=c.block_color}if(c.label_color!==undefined){this.prefs.label_color=c.label_color}if(c.show_counts!==undefined){this.prefs.show_counts=c.show_counts}};$.extend(FeatureTrack.prototype,TiledTrack.prototype,{init:function(){var a=this,b="initial";this.init_each({low:a.view.max_low,high:a.view.max_high,dataset_id:a.dataset_id,chrom:a.view.chrom,resolution:this.view.resolution,mode:a.mode},function(c){a.mode_div.show();a.data_cache.set(b,c);a.draw()})},get_da
 ta:function(a,d){var b=this,c=a+"_"+d;if(!b.data_queue[c]){b.data_queue[c]=true;$.getJSON(data_url,{chrom:b.view.chrom,low:a,high:d,dataset_id:b.dataset_id,resolution:this.view.resolution,mode:this.mode},function(e){b.data_cache.set(c,e);delete b.data_queue[c];b.draw()})}},incremental_slots:function(a,h,c,r){if(!this.inc_slots[a]){this.inc_slots[a]={};this.inc_slots[a].w_scale=1/a;this.inc_slots[a].mode=r;this.s_e_by_tile[a]={}}var n=this.inc_slots[a].w_scale,z=[],l=0,b=$("<canvas></canvas>").get(0).getContext("2d"),o=this.view.max_low;var B=[];if(this.inc_slots[a].mode!==r){delete this.inc_slots[a];this.inc_slots[a]={mode:r,w_scale:n};delete this.s_e_by_tile[a];this.s_e_by_tile[a]={}}for(var w=0,x=h.length;w<x;w++){var g=h[w],m=g[0];if(this.inc_slots[a][m]!==undefined){l=Math.max(l,this.inc_slots[a][m]);B.push(this.inc_slots[a][m])}else{z.push(w)}}for(var w=0,x=z.length;w<x;w++){var g=h[z[w]],m=g[0],s=g[1],d=g[2],q=g[3],e=Math.floor((s-o)*n),f=Math.ceil((d-o)*n);if(q!==unde
 fined&&!c){var t=b.measureText(q).width;if(e-t<0){f+=t}else{e-=t}}var v=0;while(true){var p=true;if(this.s_e_by_tile[a][v]!==undefined){for(var u=0,A=this.s_e_by_tile[a][v].length;u<A;u++){var y=this.s_e_by_tile[a][v][u];if(f>y[0]&&e<y[1]){p=false;break}}}if(p){if(this.s_e_by_tile[a][v]===undefined){this.s_e_by_tile[a][v]=[]}this.s_e_by_tile[a][v].push([e,f]);this.inc_slots[a][m]=v;l=Math.max(l,v);break}v++}}return l},rect_or_text:function(n,o,f,m,b,d,k,e,h){n.textAlign="center";var j=Math.round(o/2);if((this.mode==="Pack"||this.mode==="Auto")&&d!==undefined&&o>PX_PER_CHAR){n.fillStyle=this.prefs.block_color;n.fillRect(k,h+1,e,9);n.fillStyle="#eee";for(var g=0,l=d.length;g<l;g++){if(b+g>=f&&b+g<=m){var a=Math.floor(Math.max(0,(b+g-f)*o));n.fillText(d[g],a+this.left_offset+j,h+9)}}}else{n.fillStyle=this.prefs.block_color;n.fillRect(k,h+4,e,3)}},draw_tile:function(Y,l,o,al){var F=l*DENSITY*Y,ae=(l+1)*DENSITY*Y,E=ae-F;var af=(!this.initial_canvas?"initial":F+"_"+ae);var A=this.
 data_cache.get(af);var d;if(A===undefined||(this.mode!=="Auto"&&A.dataset_type==="summary_tree")){this.data_queue[[F,ae]]=true;this.get_data(F,ae);return}var a=Math.ceil(E*al),M=$("<canvas class='tile'></canvas>"),aa=this.prefs.label_color,g=this.prefs.block_color,n=this.mode,W=(n==="Squish")||(n==="Dense")&&(n!=="Pack")||(n==="Auto"&&(A.extra_info==="no_detail")),Q=this.left_offset,ak,t,am;if(A.dataset_type==="summary_tree"){t=this.summary_draw_height}else{if(n==="Dense"){t=25;am=10}else{am=(W?this.vertical_nodetail_px:this.vertical_detail_px);t=this.incremental_slots(this.view.zoom_res,A.data,W,n)*am+15;ak=this.inc_slots[this.view.zoom_res]}}M.css({position:"absolute",top:0,left:(F-this.view.low)*al-Q});M.get(0).width=a+Q;M.get(0).height=t;o.parent().css("height",Math.max(this.height_px,t)+"px");var B=M.get(0).getContext("2d");B.fillStyle=g;B.font=this.default_font;B.textAlign="right";if(A.dataset_type=="summary_tree"){var L,I=55,ad=255-I,h=ad*2/3,S=A.data,D=A.max,m=A.avg,
 b=Math.ceil(A.delta*al);for(var ah=0,z=S.length;ah<z;ah++){var U=Math.floor((S[ah][0]-F)*al);var T=S[ah][1];if(!T){continue}L=Math.floor(ad-(T/D)*ad);B.fillStyle="rgb("+L+","+L+","+L+")";B.fillRect(U+Q,0,b,this.summary_draw_height);if(this.prefs.show_counts&&B.measureText(T).width<b){if(L>h){B.fillStyle="black"}else{B.fillStyle="#ddd"}B.textAlign="center";B.fillText(T,U+Q+(b/2),12)}}d="Summary";o.append(M);return M}if(A.message){M.css({border:"solid red","border-width":"2px 2px 2px 0px"});B.fillStyle="red";B.textAlign="left";B.fillText(A.message,100+Q,am)}var aj=A.data;var ag=0;for(var ah=0,z=aj.length;ah<z;ah++){var N=aj[ah],K=N[0],ai=N[1],V=N[2],G=N[3];if(ai<=ae&&V>=F){var X=Math.floor(Math.max(0,(ai-F)*al)),C=Math.ceil(Math.min(a,Math.max(0,(V-F)*al))),R=(n==="Dense"?1:(1+ak[K]))*am;if(A.dataset_type==="bai"){B.fillStyle=g;if(N[4] instanceof Array){var u=Math.floor(Math.max(0,(N[4][0]-F)*al)),J=Math.ceil(Math.min(a,Math.max(0,(N[4][1]-F)*al))),s=Math.floor(Math.max(0,(N[5
 ][0]-F)*al)),q=Math.ceil(Math.min(a,Math.max(0,(N[5][1]-F)*al)));if(N[4][1]>=F&&N[4][0]<=ae){this.rect_or_text(B,al,F,ae,N[4][0],N[4][2],u+Q,J-u,R)}if(N[5][1]>=F&&N[5][0]<=ae){this.rect_or_text(B,al,F,ae,N[5][0],N[5][2],s+Q,q-s,R)}if(s>J){B.fillStyle="#999";B.fillRect(J+Q,R+5,s-J,1)}}else{B.fillStyle=g;this.rect_or_text(B,al,F,ae,ai,G,X+Q,C-X,R)}if(n!=="Dense"&&!W&&ai>F){B.fillStyle=this.prefs.label_color;if(l===0&&X-B.measureText(G).width<0){B.textAlign="left";B.fillText(K,C+2+Q,R+8)}else{B.textAlign="right";B.fillText(K,X-2+Q,R+8)}B.fillStyle=g}}else{if(A.dataset_type==="interval_index"){if(W){B.fillStyle=g;B.fillRect(X+Q,R+5,C-X,1)}else{var w=N[4],P=N[5],Z=N[6],f=N[7];var v,ab,H=null,an=null;if(P&&Z){H=Math.floor(Math.max(0,(P-F)*al));an=Math.ceil(Math.min(a,Math.max(0,(Z-F)*al)))}if(n!=="Dense"&&G!==undefined&&ai>F){B.fillStyle=aa;if(l===0&&X-B.measureText(G).width<0){B.textAlign="left";B.fillText(G,C+2+Q,R+8)}else{B.textAlign="right";B.fillText(G,X-2+Q,R+8)}B.fillStyle=
 g}if(f){if(w){if(w=="+"){B.fillStyle=RIGHT_STRAND}else{if(w=="-"){B.fillStyle=LEFT_STRAND}}B.fillRect(X+Q,R,C-X,10);B.fillStyle=g}for(var af=0,e=f.length;af<e;af++){var p=f[af],c=Math.floor(Math.max(0,(p[0]-F)*al)),O=Math.ceil(Math.min(a,Math.max((p[1]-F)*al)));if(c>O){continue}v=5;ab=3;B.fillRect(c+Q,R+ab,O-c,v);if(H!==undefined&&!(c>an||O<H)){v=9;ab=1;var ac=Math.max(c,H),r=Math.min(O,an);B.fillRect(ac+Q,R+ab,r-ac,v)}}}else{v=9;ab=1;B.fillRect(X+Q,R+ab,C-X,v);if(N.strand){if(N.strand=="+"){B.fillStyle=RIGHT_STRAND_INV}else{if(N.strand=="-"){B.fillStyle=LEFT_STRAND_INV}}B.fillRect(X+Q,R,C-X,10);B.fillStyle=g}}}}}ag++}}o.append(M);return M},gen_options:function(j){var a=$("<div />").addClass("form-row");var e="track_"+j+"_block_color",l=$("<label />").attr("for",e).text("Block color:"),m=$("<input />").attr("id",e).attr("name",e).val(this.prefs.block_color),k="track_"+j+"_label_color",g=$("<label />").attr("for",k).text("Text color:"),h=$("<input />").attr("id",k).attr("name
 ",k).val(this.prefs.label_color),f="track_"+j+"_show_count",c=$("<label />").attr("for",f).text("Show summary counts"),b=$('<input type="checkbox" style="float:left;"></input>').attr("id",f).attr("name",f).attr("checked",this.prefs.show_counts),d=$("<div />").append(b).append(c);return a.append(l).append(m).append(g).append(h).append(d)},update_options:function(e){var b=$("#track_"+e+"_block_color").val(),d=$("#track_"+e+"_label_color").val(),c=$("#track_"+e+"_mode option:selected").val(),a=$("#track_"+e+"_show_count").attr("checked");if(b!==this.prefs.block_color||d!==this.prefs.label_color||a!==this.prefs.show_counts){this.prefs.block_color=b;this.prefs.label_color=d;this.prefs.show_counts=a;this.tile_cache.clear();this.draw()}}});var ReadTrack=function(d,b,a,c){FeatureTrack.call(this,d,b,a,c);this.track_type="ReadTrack";this.vertical_detail_px=10;this.vertical_nodetail_px=5};$.extend(ReadTrack.prototype,TiledTrack.prototype,FeatureTrack.prototype,{});
--- a/static/scripts/trackster.js
+++ b/static/scripts/trackster.js
@@ -951,9 +951,8 @@ var FeatureTrack = function ( name, view
         var track = this,
             key = "initial";
-        this.init_each({    low: track.view.max_low, 
-                            high: track.view.max_high, dataset_id: track.dataset_id,
-                            chrom: track.view.chrom, resolution: this.view.resolution }, function (result) {    
+        this.init_each({    low: track.view.max_low, high: track.view.max_high, dataset_id: track.dataset_id,
+                            chrom: track.view.chrom, resolution: this.view.resolution, mode: track.mode }, function (result) {    
             track.mode_div.show();
             track.data_cache.set(key, result);
             track.draw();
@@ -1089,12 +1088,11 @@ var FeatureTrack = function ( name, view
                 break;
             }
         }*/
-        
         var k = (!this.initial_canvas ? "initial" : tile_low + '_' + tile_high);
         var result = this.data_cache.get(k);
         var cur_mode;
-        if (result === undefined) {
+        if (result === undefined || (this.mode !== "Auto" && result.dataset_type === "summary_tree")) {
             this.data_queue[ [tile_low, tile_high] ] = true;
             this.get_data(tile_low, tile_high);
             return;
@@ -1112,7 +1110,7 @@ var FeatureTrack = function ( name, view
         if (result.dataset_type === "summary_tree") {
             required_height = this.summary_draw_height;
         } else if (mode === "Dense") {
-            required_height = 15;
+            required_height = 25;
             y_scale = 10;
         } else {
             // Calculate new slots incrementally for this new chunk of data and update height if necessary
@@ -1169,6 +1167,16 @@ var FeatureTrack = function ( name, view
             return new_canvas;
         }
+        if (result.message) {
+            new_canvas.css({
+                border: "solid red",
+                "border-width": "2px 2px 2px 0px"            
+            });
+            ctx.fillStyle = "red";
+            ctx.textAlign = "left";
+            ctx.fillText(result.message, 100 + left_offset, y_scale);
+        }
+        
         var data = result.data;
         var j = 0;
         for (var i = 0, len = data.length; i < len; i++) {
@@ -1181,7 +1189,7 @@ var FeatureTrack = function ( name, view
             if (feature_start <= tile_high && feature_end >= tile_low) {
                 var f_start = Math.floor( Math.max(0, (feature_start - tile_low) * w_scale) ),
                     f_end   = Math.ceil( Math.min(width, Math.max(0, (feature_end - tile_low) * w_scale)) ),
-                    y_center = (mode === "Dense" ? 0 : slots[feature_uid] * y_scale);
+                    y_center = (mode === "Dense" ? 1 : (1 + slots[feature_uid])) * y_scale;
if (result.dataset_type === "bai") {
                     ctx.fillStyle = block_color;
@@ -1222,6 +1230,7 @@ var FeatureTrack = function ( name, view
// console.log(feature_uid, feature_start, feature_end, f_start, f_end, y_center);
                     if (no_detail) {
+                        ctx.fillStyle = block_color;
                         ctx.fillRect(f_start + left_offset, y_center + 5, f_end - f_start, 1);
                     } else {
                         // Showing labels, blocks, details
@@ -1291,7 +1300,7 @@ var FeatureTrack = function ( name, view
                                     ctx.fillStyle = LEFT_STRAND_INV;
                                 }
                                 ctx.fillRect(f_start + left_offset, y_center, f_end - f_start, 10);
-                                ctx.fillStyle = prefs.block_color;
+                                ctx.fillStyle = block_color;
                             }
                         }
                     }
--- a/lib/galaxy/web/controllers/tracks.py
+++ b/lib/galaxy/web/controllers/tracks.py
@@ -291,7 +291,8 @@ class TracksController( BaseController, 
             # Have to choose between indexer and data provider
             indexer = dataset_type_to_data_provider[data_sources['index']]( dataset.get_converted_dataset(trans, data_sources['index']), dataset )
             summary = indexer.get_summary( chrom, low, high, **kwargs )
-            if summary is not None:
+            if summary is not None and kwargs.get("mode", "Auto") == "Auto":
+                # Only check for summary if it's Auto mode (which is the default)
                 if summary == "no_detail":
                     kwargs["no_detail"] = True # meh
                     extra_info = "no_detail"
--- a/lib/galaxy/web/controllers/visualization.py
+++ b/lib/galaxy/web/controllers/visualization.py
@@ -228,7 +228,7 @@ class VisualizationController( BaseContr
# Get session and visualization.
         session = trans.sa_session
-        visualization = trans.sa_session.query( model.Visualization ).get( trans.security.decode_id( id ) )
+        visualization = self.get_visualization( trans, id, check_ownership=True )
# Do operation on visualization.
         if 'make_accessible_via_link' in kwargs:
@@ -261,7 +261,7 @@ class VisualizationController( BaseContr
     def share( self, trans, id=None, email="", use_panels=False ):
         """ Handle sharing a visualization with a particular user. """
         msg = mtype = None
-        visualization = trans.sa_session.query( model.Visualization ).get( trans.security.decode_id( id ) )
+        visualization = self.get_visualization( trans, id, check_ownership=True )
         if email:
             other = trans.sa_session.query( model.User ) \
                                     .filter( and_( model.User.table.c.email==email,
@@ -330,7 +330,7 @@ class VisualizationController( BaseContr
     @web.require_login( "get item name and link" )
     def get_name_and_link_async( self, trans, id=None ):
         """ Returns visualization's name and link. """
-        visualization = self.get_visualization( trans, id )
+        visualization = self.get_visualization( trans, id, check_ownership=False, check_accessible=True )
if self.create_item_slug( trans.sa_session, visualization ):
             trans.sa_session.flush()
@@ -342,7 +342,7 @@ class VisualizationController( BaseContr
         """ Returns item content in HTML format. """
# Get visualization, making sure it's accessible.
-        visualization = self.get_visualization( trans, id, False, True )
+        visualization = self.get_visualization( trans, id, check_ownership=False, check_accessible=True )
         if visualization is None:
             raise web.httpexceptions.HTTPNotFound()
@@ -373,25 +373,26 @@ class VisualizationController( BaseContr
                 visualization = model.Visualization()
                 visualization.title = visualization_title
                 visualization.slug = visualization_slug
+                visualization.dbkey = visualization_dbkey
+                visualization.type = 'trackster' # HACK: set visualization type to trackster since it's the only viz
                 visualization_annotation = sanitize_html( visualization_annotation, 'utf-8', 'text/html' )
                 self.add_item_annotation( trans, visualization, visualization_annotation )
                 visualization.user = user
+                
                 # And the first (empty) visualization revision
                 visualization_revision = model.VisualizationRevision()
                 visualization_revision.title = visualization_title
+                visualization_revision.config = {}
+                visualization_revision.dbkey = visualization_dbkey
                 visualization_revision.visualization = visualization
-                # HACK: set visualization type to trackster; when we have multiple visualization types, we'll need to get type from the user.
-                visualization.type = 'trackster'
                 visualization.latest_revision = visualization_revision
-                # Visualization config is dbkey for now.
-                visualization.latest_revision.config = { 'dbkey' : visualization_dbkey }
-                visualization_revision.content = ""
+
                 # Persist
                 session = trans.sa_session
-                session.add( visualization )
+                session.add(visualization)
+                session.add(visualization_revision)
                 session.flush()
-                # Display the management visualization
-                ## trans.set_message( "Visualization '%s' created" % visualization.title )
+
                 return trans.response.send_redirect( web.url_for( action='list' ) )
return trans.show_form( 
@@ -414,12 +415,9 @@ class VisualizationController( BaseContr
         """
         Edit a visualization's attributes.
         """
-        encoded_id = id
-        id = trans.security.decode_id( id )
+        visualization = self.get_visualization( trans, id, check_ownership=True )
         session = trans.sa_session
-        visualization = session.query( model.Visualization ).get( id )
-        user = trans.user
-        assert visualization.user == user
+        
         visualization_title_err = visualization_slug_err = visualization_annotation_err = ""
         if trans.request.method == "POST":
             if not visualization_title:
@@ -428,7 +426,7 @@ class VisualizationController( BaseContr
                 visualization_slug_err = "Visualization id is required"
             elif not VALID_SLUG_RE.match( visualization_slug ):
                 visualization_slug_err = "Visualization identifier must consist of only lowercase letters, numbers, and the '-' character"
-            elif visualization_slug != visualization.slug and trans.sa_session.query( model.Visualization ).filter_by( user=user, slug=visualization_slug, deleted=False ).first():
+            elif visualization_slug != visualization.slug and trans.sa_session.query( model.Visualization ).filter_by( user=visualization.user, slug=visualization_slug, deleted=False ).first():
                 visualization_slug_err = "Visualization id must be unique"
             else:
                 visualization.title = visualization_title
@@ -449,7 +447,7 @@ class VisualizationController( BaseContr
             if not visualization_annotation:
                 visualization_annotation = ""
         return trans.show_form( 
-            web.FormBuilder( web.url_for( id=encoded_id ), "Edit visualization attributes", submit_text="Submit" )
+            web.FormBuilder( web.url_for( id=id ), "Edit visualization attributes", submit_text="Submit" )
                 .add_text( "visualization_title", "Visualization title", value=visualization_title, error=visualization_title_err )
                 .add_text( "visualization_slug", "Visualization identifier", value=visualization_slug, error=visualization_slug_err,
                            help="""A unique identifier that will be used for
@@ -460,18 +458,5 @@ class VisualizationController( BaseContr
                 .add_text( "visualization_annotation", "Visualization annotation", value=visualization_annotation, error=visualization_annotation_err,
                             help="A description of the visualization; annotation is shown alongside published visualizations."),
             template="visualization/create.mako" )
+
-    # @web.expose
-    # @web.require_login()
-    # def list( self, trans, *args, **kwargs ):
-    #     return self.list_grid( trans, *args, **kwargs )
-    
-    #@web.expose
-    #@web.require_admin  
-    #def index( self, trans, *args, **kwargs ):
-    #    # Build grid
-    #    grid = self.list( trans, *args, **kwargs )
-    #    # Render grid wrapped in panels
-    #    return trans.fill_template( "visualization/index.mako", grid=grid )
-    
-
--- a/templates/tracks/browser.mako
+++ b/templates/tracks/browser.mako
@@ -41,6 +41,7 @@
 <div class="unified-panel-header" unselectable="on"><div class="unified-panel-header-inner"><div style="float:left;" id="title"></div>
+        <a class="panel-header-button right-float" href="${h.url_for( controller='visualization', action='list' )}">Close</a><a id="save-button" class="panel-header-button right-float" href="javascript:void(0);">Save</a><a id="refresh-button" class="panel-header-button right-float" href="javascript:void(0);" onclick="view.update_options();return false;">Refresh</a></div>

    

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