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HTMLFeatures.js
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HTMLFeatures.js
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define( [
'dojo/_base/declare',
'dojo/_base/lang',
'dojo/_base/array',
'dojo/dom-geometry',
'dojo/on',
'dojo/aspect',
'dijit/Menu',
'dijit/Dialog',
'dijit/PopupMenuItem',
'dijit/MenuItem',
'JBrowse/View/Track/BlockBased',
'JBrowse/View/Track/YScaleMixin',
'JBrowse/Util',
'JBrowse/View/GranularRectLayout'
],
function( declare,
lang,
array,
domGeom,
on,
aspect,
dijitMenu,
dijitDialog,
dijitPopupMenuItem,
dijitMenuItem,
BlockBased,
YScaleMixin,
Util,
Layout
) {
var HTMLFeatures = declare( BlockBased,
/**
* @lends JBrowse.View.Track.HTMLFeatures.prototype
*/
{
/**
* A track that draws discrete features using `div` elements.
* @constructs
* @extends JBrowse.View.Track.BlockBased
* @param args.config {Object} track configuration. Must include key, label
* @param args.refSeq {Object} reference sequence object with name, start,
* and end members.
* @param args.changeCallback {Function} optional callback for
* when the track's data is loaded and ready
* @param args.trackPadding {Number} distance in px between tracks
*/
constructor: function( args ) {
this.fields = {};
this.refSeq = args.refSeq;
//number of histogram bins per block
this.numBins = 25;
this.histLabel = false;
this.padding = 5;
this.trackPadding = args.trackPadding;
this.config = args.config;
// this featureStore object should eventually be
// instantiated by Browser and passed into this constructor, not
// constructed here.
this.featureStore = args.store;
// connect the store and track loadSuccess and loadFailed events
// to eachother
dojo.connect( this.featureStore, 'loadSuccess', this, 'loadSuccess' );
dojo.connect( this.featureStore, 'loadFail', this, 'loadFail' );
// initialize a bunch of config stuff
var defaultConfig = {
description: true,
style: {
className: "feature2",
histScale: 4,
labelScale: 30,
subfeatureScale: 80,
maxDescriptionLength: 70,
descriptionScale: 170
},
hooks: {
create: function(track, feat ) {
return document.createElement('div');
}
},
events: {
click: this.config.style.linkTemplate
? { action: "newWindow", url: this.config.style.linkTemplate }
: { action: "contentDialog", content: dojo.hitch( this, 'defaultFeatureDetail' ) }
},
menuTemplate: [
{ label: 'View details',
action: 'contentDialog',
iconClass: 'dijitIconTask',
content: dojo.hitch( this, 'defaultFeatureDetail' )
}
]
};
Util.deepUpdate(defaultConfig, this.config);
this.config = defaultConfig;
this.eventHandlers = (function() {
var handlers = dojo.clone( this.config.events || {} );
// find conf vars that set events, like `onClick`
for( var key in this.config ) {
var handlerName = key.replace(/^on(?=[A-Z])/, '');
if( handlerName != key )
handlers[ handlerName.toLowerCase() ] = this.config[key];
}
// interpret handlers that are just strings to be URLs that should be opened
for( key in handlers ) {
if( typeof handlers[key] == 'string' )
handlers[key] = { url: handlers[key] };
}
return handlers;
}).call(this);
this.eventHandlers.click = this._makeClickHandler( this.eventHandlers.click );
},
/**
* Request that the track load its data. The track will call its own
* loadSuccess() function when it is loaded.
*/
load: function() {
this.featureStore.load();
},
loadSuccess: function() {
this.labelScale = this.featureStore.density * this.config.style.labelScale;
this.subfeatureScale = this.featureStore.density * this.config.style.subfeatureScale;
this.descriptionScale = this.featureStore.density * this.config.style.descriptionScale;;
this.inherited(arguments);
},
/**
* Make a default feature detail page for the given feature.
* @returns {HTMLElement} feature detail page HTML
*/
defaultFeatureDetail: function( /** JBrowse.Track */ track, /** Object */ f, /** HTMLElement */ div ) {
var fmt = dojo.hitch( this, '_fmtFeatureDetailField' );
var container = dojo.create('div', { className: 'feature-detail feature-detail-'+track.name, innerHTML: '' } );
container.innerHTML += fmt( 'Name', f.get('name') );
container.innerHTML += fmt( 'Type', f.get('type') );
container.innerHTML += fmt( 'Description', f.get('note') );
container.innerHTML += fmt( 'Position', this.refSeq.name+':'+f.get('start')+'..'+f.get('end') );
container.innerHTML += fmt( 'Strand', {'1':'+', '-1': '-', 0: undefined }[f.get('strand')] || f.get('strand') );
var additionalTags = array.filter( f.tags(), function(t) { return ! {name:1,start:1,end:1,strand:1,note:1,subfeatures:1,type:1}[t.toLowerCase()]; });
dojo.forEach( additionalTags.sort(), function(t) {
container.innerHTML += fmt( t, f.get(t) );
});
return container;
},
_fmtFeatureDetailField: function( title, val, class_ ) {
var valType = typeof val;
if( !( valType in {string:1,number:1} ) )
return ''; //val = '<span class="ghosted">none</span>';
class_ = class_ || title.replace(/\s+/g,'_').toLowerCase();
return '<div class="field_container"><h2 class="field '+class_+'">'+title+'</h2> <div class="value '+class_+'">'+val+'</div></div>';
},
// _autoLinkText: function( text ) {
// return text
// // GO terms like GO:12345
// .replace(/\b(GO:\d{5,})\b/g, '<a href="http://amigo.geneontology.org/cgi-bin/amigo/term_details?term=$1">$1</a>');
// },
/**
* Make life easier for event handlers by handing them some things
*/
wrapHandler: function(handler) {
var track = this;
return function(event) {
event = event || window.event;
if (event.shiftKey) return;
var elem = (event.currentTarget || event.srcElement);
//depending on bubbling, we might get the subfeature here
//instead of the parent feature
if (!elem.feature) elem = elem.parentElement;
if (!elem.feature) return; //shouldn't happen; just bail if it does
handler(track, elem, elem.feature, event);
};
},
/**
* Return an object with some statistics about the histograms we will
* draw for a given block size in base pairs.
* @private
*/
_histDimensions: function( blockSizeBp ) {
// bases in each histogram bin that we're currently rendering
var bpPerBin = blockSizeBp / this.numBins;
var pxPerCount = 2;
var logScale = false;
var stats = this.featureStore.histograms.stats;
var statEntry;
for (var i = 0; i < stats.length; i++) {
if (stats[i].basesPerBin >= bpPerBin) {
//console.log("bpPerBin: " + bpPerBin + ", histStats bases: " + this.histStats[i].bases + ", mean/max: " + (this.histStats[i].mean / this.histStats[i].max));
logScale = ((stats[i].mean / stats[i].max) < .01);
pxPerCount = 100 / (logScale ?
Math.log(stats[i].max) :
stats[i].max);
statEntry = stats[i];
break;
}
}
return {
bpPerBin: bpPerBin,
pxPerCount: pxPerCount,
logScale: logScale,
stats: statEntry
};
},
fillHist: function( blockIndex, block, leftBase, rightBase, stripeWidth ) {
var dims = this._histDimensions( Math.abs( rightBase - leftBase ) );
var track = this;
var makeHistBlock = function(hist) {
var maxBin = 0;
for (var bin = 0; bin < track.numBins; bin++) {
if (typeof hist[bin] == 'number' && isFinite(hist[bin])) {
maxBin = Math.max(maxBin, hist[bin]);
}
}
var binDiv;
for (bin = 0; bin < track.numBins; bin++) {
if (!(typeof hist[bin] == 'number' && isFinite(hist[bin])))
continue;
binDiv = document.createElement("div");
binDiv.className = "hist "+track.config.style.className + "-hist";
binDiv.style.cssText =
"left: " + ((bin / track.numBins) * 100) + "%; "
+ "height: "
+ ((dims.pxPerCount * ( dims.logScale ? Math.log(hist[bin]) : hist[bin]))-2)
+ "px;"
+ "bottom: " + track.trackPadding + "px;"
+ "width: " + (((1 / track.numBins) * 100) - (100 / stripeWidth)) + "%;"
+ (track.config.style.histCss ?
track.config.style.histCss : "");
binDiv.setAttribute('value',hist[bin]);
if (Util.is_ie6) binDiv.appendChild(document.createComment());
block.appendChild(binDiv);
}
track.heightUpdate( dims.pxPerCount * ( dims.logScale ? Math.log(maxBin) : maxBin ),
blockIndex );
track.makeHistogramYScale( Math.abs(rightBase-leftBase) );
};
// The histogramMeta array describes multiple levels of histogram detail,
// going from the finest (smallest number of bases per bin) to the
// coarsest (largest number of bases per bin).
// We want to use coarsest histogramMeta that's at least as fine as the
// one we're currently rendering.
// TODO: take into account that the histogramMeta chosen here might not
// fit neatly into the current histogram (e.g., if the current histogram
// is at 50,000 bases/bin, and we have server histograms at 20,000
// and 2,000 bases/bin, then we should choose the 2,000 histogramMeta
// rather than the 20,000)
var histogramMeta = this.featureStore.histograms.meta[0];
for (var i = 0; i < this.featureStore.histograms.meta.length; i++) {
if (dims.bpPerBin >= this.featureStore.histograms.meta[i].basesPerBin)
histogramMeta = this.featureStore.histograms.meta[i];
}
// number of bins in the server-supplied histogram for each current bin
var binCount = dims.bpPerBin / histogramMeta.basesPerBin;
// if the server-supplied histogram fits neatly into our current histogram,
if ((binCount > .9)
&&
(Math.abs(binCount - Math.round(binCount)) < .0001)) {
// we can use the server-supplied counts
var firstServerBin = Math.floor(leftBase / histogramMeta.basesPerBin);
binCount = Math.round(binCount);
var histogram = [];
for (var bin = 0; bin < this.numBins; bin++)
histogram[bin] = 0;
histogramMeta.lazyArray.range(
firstServerBin,
firstServerBin + (binCount * this.numBins),
function(i, val) {
// this will count features that span the boundaries of
// the original histogram multiple times, so it's not
// perfectly quantitative. Hopefully it's still useful, though.
histogram[Math.floor((i - firstServerBin) / binCount)] += val;
},
function() {
makeHistBlock(histogram);
}
);
} else {
// make our own counts
this.featureStore.histogram( leftBase, rightBase,
this.numBins, makeHistBlock);
}
},
endZoom: function(destScale, destBlockBases) {
this.clear();
},
updateStaticElements: function( coords ) {
BlockBased.prototype.updateStaticElements.apply( this, arguments );
this.updateYScaleFromViewDimensions( coords );
this.updateFeatureLabelPositions( coords );
},
updateFeatureLabelPositions: function( coords ) {
if( ! 'x' in coords || this.scale < this.labelScale )
return;
dojo.query( '.block', this.div )
.forEach( function(block) {
// calculate the view left coord relative to the
// block left coord in units of pct of the block
// width
var viewLeft = 100 * ( coords.x - block.offsetLeft ) / block.offsetWidth + 2;
// if the view start is unknown, or is to the
// left of this block, we don't have to worry
// about adjusting the feature labels
if( ! viewLeft )
return;
var blockWidth = block.endBase - block.startBase;
dojo.query('.feature',block)
.forEach( function(featDiv) {
if( ! featDiv.label ) return;
var labelDiv = featDiv.label;
var feature = featDiv.feature;
// get the feature start and end in terms of block width pct
var minLeft = parseInt( feature.get('start') );
minLeft = 100 * (minLeft - block.startBase) / blockWidth;
var maxLeft = parseInt( feature.get('end') );
maxLeft = 100 * ( (maxLeft - block.startBase) / blockWidth
- labelDiv.offsetWidth / block.offsetWidth
);
// move our label div to the view start if the start is between the feature start and end
labelDiv.style.left = Math.max( minLeft, Math.min( viewLeft+70, maxLeft ) ) + '%';
},this);
},this);
},
fillBlock: function(blockIndex, block, leftBlock, rightBlock, leftBase, rightBase, scale, stripeWidth, containerStart, containerEnd) {
// only update the label once for each block size
var blockBases = Math.abs( leftBase-rightBase );
if( this._updatedLabelForBlockSize != blockBases ){
if ( scale < (this.featureStore.density * this.config.style.histScale)) {
this.setLabel(this.key + "<br>per " + Util.addCommas( Math.round( blockBases / this.numBins)) + " bp");
} else {
this.setLabel(this.key);
}
this._updatedLabelForBlockSize = blockBases;
}
//console.log("scale: %d, histScale: %d", scale, this.histScale);
if (this.featureStore.histograms &&
(scale < (this.featureStore.density * this.config.style.histScale)) ) {
this.fillHist(blockIndex, block, leftBase, rightBase, stripeWidth,
containerStart, containerEnd);
} else {
// if we have transitioned to viewing features, delete the
// y-scale used for the histograms
if( this.yscale ) {
this._removeYScale();
}
this.fillFeatures(blockIndex, block, leftBlock, rightBlock,
leftBase, rightBase, scale,
containerStart, containerEnd);
}
},
/**
* Creates a Y-axis scale for the feature histogram. Must be run after
* the histogram bars are drawn, because it sometimes must use the
* track height to calculate the max value if there are no explicit
* histogram stats.
* @param {Number} blockSizeBp the size of the blocks in base pairs.
* Necessary for calculating histogram stats.
*/
makeHistogramYScale: function( blockSizeBp ) {
var dims = this._histDimensions( blockSizeBp);
if( dims.logScale ) {
console.error("Log histogram scale axis labels not yet implemented.");
return;
}
var maxval = dims.stats ? dims.stats.max : this.height/dims.pxPerCount;
maxval = dims.logScale ? log(maxval) : maxval;
// if we have a scale, and it has the same characteristics
// (including pixel height), don't redraw it.
if( this.yscale && this.yscale_params
&& this.yscale_params.maxval == maxval
&& this.yscale_params.height == this.height
&& this.yscale_params.blockbp == blockSizeBp
) {
return;
} else {
this._removeYScale();
this.makeYScale({ min: 0, max: maxval });
this.yscale_params = {
height: this.height,
blockbp: blockSizeBp,
maxval: maxval
};
}
},
/**
* Delete the Y-axis scale if present.
* @private
*/
_removeYScale: function() {
if( !this.yscale )
return;
this.yscale.parentNode.removeChild( this.yscale );
delete this.yscale_params;
delete this.yscale;
},
cleanupBlock: function(block) {
// garbage collect the layout
if ( block && this.layout )
this.layout.discardRange( block.startBase, block.endBase );
},
/**
* Called when sourceBlock gets deleted. Any child features of
* sourceBlock that extend onto destBlock should get moved onto
* destBlock.
*/
transfer: function(sourceBlock, destBlock, scale, containerStart, containerEnd) {
if (!(sourceBlock && destBlock)) return;
var destLeft = destBlock.startBase;
var destRight = destBlock.endBase;
var blockWidth = destRight - destLeft;
var sourceSlot;
var overlaps = (sourceBlock.startBase < destBlock.startBase)
? sourceBlock.rightOverlaps
: sourceBlock.leftOverlaps;
overlaps = overlaps || [];
for (var i = 0; i < overlaps.length; i++) {
//if the feature overlaps destBlock,
//move to destBlock & re-position
sourceSlot = sourceBlock.featureNodes[ overlaps[i] ];
if (sourceSlot && ("label" in sourceSlot)) {
sourceSlot.label.parentNode.removeChild(sourceSlot.label);
}
if (sourceSlot && sourceSlot.feature) {
if ( sourceSlot.layoutEnd > destLeft
&& sourceSlot.feature.get('start') < destRight ) {
sourceBlock.removeChild(sourceSlot);
delete sourceBlock.featureNodes[ overlaps[i] ];
var featDiv =
this.renderFeature(sourceSlot.feature, overlaps[i],
destBlock, scale,
containerStart, containerEnd, destBlock );
}
}
}
},
/**
* arguments:
* @param block div to be filled with info
* @param leftBlock div to the left of the block to be filled
* @param rightBlock div to the right of the block to be filled
* @param leftBase starting base of the block
* @param rightBase ending base of the block
* @param scale pixels per base at the current zoom level
* @param containerStart don't make HTML elements extend further left than this
* @param containerEnd don't make HTML elements extend further right than this. 0-based.
*/
fillFeatures: function(blockIndex, block, leftBlock, rightBlock, leftBase, rightBase, scale, containerStart, containerEnd) {
this.scale = scale;
if( ! this.layout || this.layout.pitchX != 2/scale )
this.layout = new Layout({pitchX: 2/scale, pitchY: 10});
block.featureNodes = {};
block.style.backgroundColor = "#ddd";
//determine the glyph height, arrowhead width, label text dimensions, etc.
if (!this.haveMeasurements) {
this.measureStyles();
this.haveMeasurements = true;
}
var curTrack = this;
var featCallback = dojo.hitch(this,function(feature, path) {
//uniqueId is a stringification of the path in the NCList where
//the feature lives; it's unique across the top-level NCList
//(the top-level NCList covers a track/chromosome combination)
var uniqueId = path.join(",");
if( ! this._featureIsRendered( uniqueId ) ) {
this.renderFeature( feature, uniqueId, block, scale,
containerStart, containerEnd, block );
}
});
// var startBase = goLeft ? rightBase : leftBase;
// var endBase = goLeft ? leftBase : rightBase;
this.featureStore.iterate( leftBase, rightBase, featCallback,
function () {
block.style.backgroundColor = "";
curTrack.heightUpdate(curTrack.layout.getTotalHeight(),
blockIndex);
});
},
/**
* Returns true if a feature is visible and rendered someplace in the blocks of this track.
* @private
*/
_featureIsRendered: function( uniqueId ) {
var blocks = this.blocks;
for( var i=0; i<blocks.length; i++ ) {
if( blocks[i] && blocks[i].featureNodes[uniqueId])
return true;
}
return false;
},
measureStyles: function() {
//determine dimensions of labels (height, per-character width)
var heightTest = document.createElement("div");
heightTest.className = "feature-label";
heightTest.style.height = "auto";
heightTest.style.visibility = "hidden";
heightTest.appendChild(document.createTextNode("1234567890"));
document.body.appendChild(heightTest);
this.labelHeight = heightTest.clientHeight;
this.labelWidth = heightTest.clientWidth / 10;
document.body.removeChild(heightTest);
//measure the height of glyphs
var glyphBox;
heightTest = document.createElement("div");
//cover all the bases: stranded or not, phase or not
heightTest.className =
"feature " + this.config.style.className
+ " plus-" + this.config.style.className
+ " plus-" + this.config.style.className + "1";
if (this.config.style.featureCss)
heightTest.style.cssText = this.config.style.featureCss;
heightTest.style.visibility = "hidden";
if (Util.is_ie6) heightTest.appendChild(document.createComment("foo"));
document.body.appendChild(heightTest);
glyphBox = domGeom.getMarginBox(heightTest);
this.glyphHeight = glyphBox.h;
this.padding += glyphBox.w;
document.body.removeChild(heightTest);
//determine the width of the arrowhead, if any
if (this.config.style.arrowheadClass) {
var ah = document.createElement("div");
ah.className = "plus-" + this.config.style.arrowheadClass;
if (Util.is_ie6) ah.appendChild(document.createComment("foo"));
document.body.appendChild(ah);
glyphBox = domGeom.position(ah);
this.plusArrowWidth = glyphBox.w;
this.plusArrowHeight = glyphBox.h;
ah.className = "minus-" + this.config.style.arrowheadClass;
glyphBox = domGeom.position(ah);
this.minusArrowWidth = glyphBox.w;
this.minusArrowHeight = glyphBox.h;
document.body.removeChild(ah);
}
},
renderFeature: function(feature, uniqueId, block, scale, containerStart, containerEnd, destBlock ) {
//featureStart and featureEnd indicate how far left or right
//the feature extends in bp space, including labels
//and arrowheads if applicable
var featureEnd = feature.get('end');
var featureStart = feature.get('start');
if( typeof featureEnd == 'string' )
featureEnd = parseInt(featureEnd);
if( typeof featureStart == 'string' )
featureStart = parseInt(featureStart);
var levelHeight = this.glyphHeight + 2;
// if the label extends beyond the feature, use the
// label end position as the end position for layout
var name = feature.get('name') || feature.get('ID');
var description = this.config.description && scale > this.descriptionScale && ( feature.get('note') || feature.get('description') );
if( description && description.length > this.config.style.maxDescriptionLength )
description = description.substr(0, this.config.style.maxDescriptionLength+1 ).replace(/(\s+\S+|\s*)$/,'')+String.fromCharCode(8230);
// add the label div (which includes the description) to the
// calculated height of the feature if it will be displayed
if( scale >= this.labelScale ) {
if (name) {
featureEnd = Math.max(featureEnd, featureStart + (''+name).length * this.labelWidth / scale );
levelHeight += this.labelHeight;
}
if( description ) {
featureEnd = Math.max( featureEnd, featureStart + (''+description).length * this.labelWidth / scale );
levelHeight += this.labelHeight;
}
}
featureEnd += Math.max(1, this.padding / scale);
var top = this.layout.addRect( uniqueId,
featureStart,
featureEnd,
levelHeight);
var featDiv = this.config.hooks.create(this, feature );
this._connectFeatDivHandlers( featDiv );
featDiv.track = this;
featDiv.feature = feature;
featDiv.layoutEnd = featureEnd;
featDiv.className = (featDiv.className ? featDiv.className + " " : "") + "feature";
block.featureNodes[uniqueId] = featDiv;
// record whether this feature protrudes beyond the left and/or right side of the block
if( featureStart < block.startBase ) {
if( ! block.leftOverlaps ) block.leftOverlaps = [];
block.leftOverlaps.push( uniqueId );
}
if( featureEnd > block.endBase ) {
if( ! block.rightOverlaps ) block.rightOverlaps = [];
block.rightOverlaps.push( uniqueId );
}
var strand = feature.get('strand');
switch (strand) {
case 1:
case '+':
featDiv.className = featDiv.className + " plus-" + this.config.style.className; break;
case -1:
case '-':
featDiv.className = featDiv.className + " minus-" + this.config.style.className; break;
default:
featDiv.className = featDiv.className + " " + this.config.style.className; break;
}
var phase = feature.get('phase');
if ((phase !== null) && (phase !== undefined))
featDiv.className = featDiv.className + " " + featDiv.className + "_phase" + phase;
// Since some browsers don't deal well with the situation where
// the feature goes way, way offscreen, we truncate the feature
// to exist betwen containerStart and containerEnd.
// To make sure the truncated end of the feature never gets shown,
// we'll destroy and re-create the feature (with updated truncated
// boundaries) in the transfer method.
var displayStart = Math.max( feature.get('start'), containerStart );
var displayEnd = Math.min( feature.get('end'), containerEnd );
var minFeatWidth = 1;
var blockWidth = block.endBase - block.startBase;
var featwidth = Math.max(minFeatWidth, (100 * ((displayEnd - displayStart) / blockWidth)));
featDiv.style.cssText =
"left:" + (100 * (displayStart - block.startBase) / blockWidth) + "%;"
+ "top:" + top + "px;"
+ " width:" + featwidth + "%;"
+ (this.config.style.featureCss ? this.config.style.featureCss : "");
if ( this.config.style.arrowheadClass ) {
var ah = document.createElement("div");
var featwidth_px = featwidth/100*blockWidth*scale;
// NOTE: arrowheads are hidden until they are centered by
// _centerFeatureElements, so that they don't jump around
// on the screen
switch (strand) {
case 1:
case '+':
if( featwidth_px > this.plusArrowWidth*1.1 ) {
ah.className = "plus-" + this.config.style.arrowheadClass;
ah.style.cssText = "visibility: hidden; position: absolute; right: 0px; top: 0px; z-index: 100;";
featDiv.appendChild(ah);
}
break;
case -1:
case '-':
if( featwidth_px > this.minusArrowWidth*1.1 ) {
ah.className = "minus-" + this.config.style.arrowheadClass;
ah.style.cssText =
"visibility: hidden; position: absolute; left: 0px; top: 0px; z-index: 100;";
featDiv.appendChild(ah);
}
break;
}
}
if (name && (scale >= this.labelScale)) {
var labelDiv = dojo.create( 'div', {
className: "feature-label",
innerHTML: '<div class="feature-name">'+name+'</div>'
+( description ? ' <div class="feature-description">'+description+'</div>' : '' ),
style: {
top: (top + this.glyphHeight + 2) + "px",
left: (100 * (featureStart - block.startBase) / blockWidth)+'%'
}
}, block );
this._connectFeatDivHandlers( labelDiv );
featDiv.label = labelDiv;
labelDiv.feature = feature;
labelDiv.track = this;
featDiv.labelDiv = labelDiv;
}
if( destBlock ) {
destBlock.appendChild(featDiv);
}
// defer subfeature rendering and modification hooks into a
// timeout so that navigation feels faster.
window.setTimeout( dojo.hitch( this,
function() {
if( featwidth > minFeatWidth && scale >= this.subfeatureScale ) {
var subfeatures = feature.get('subfeatures');
if( subfeatures ) {
for (var i = 0; i < subfeatures.length; i++) {
this.renderSubfeature(feature, featDiv,
subfeatures[i],
displayStart, displayEnd);
}
}
}
//ie6 doesn't respect the height style if the div is empty
if (Util.is_ie6) featDiv.appendChild(document.createComment());
//TODO: handle event-handler-related IE leaks
/* Temi / AP adding right menu click
AP new schema menuTemplate: an array where everything except
children, popup and url are passed on as properties to a new
dijit.Menu object
*/
// render the popup menu if configured
if( this.config.menuTemplate ) {
this._connectMenus( featDiv );
}
if( destBlock )
this._centerFeatureElements(featDiv);
if ( typeof this.config.hooks.modify == 'function' ) {
this.config.hooks.modify(this, feature, featDiv);
}
}),50+Math.random()*50);
return featDiv;
},
/**
* Vertically centers all the child elements of a feature div.
* @private
*/
_centerFeatureElements: function( /**HTMLElement*/ featDiv ) {
for( var i = 0; i< featDiv.childNodes.length; i++ ) {
var child = featDiv.childNodes[i];
var h = child.offsetHeight || 0;
dojo.style( child, { top: ((this.glyphHeight-h)/2) + 'px', visibility: 'visible' });
}
},
/**
* Connect our configured event handlers to a given html element,
* usually a feature div or label div.
*/
_connectFeatDivHandlers: function( /** HTMLElement */ div ) {
for( var event in this.eventHandlers ) {
on( div, event, this.eventHandlers[event] );
}
// if our click handler has a label, set that as a tooltip
if( this.eventHandlers.click && this.eventHandlers.click.label )
div.setAttribute( 'title', this.eventHandlers.click.label );
},
_connectMenus: function( featDiv ) {
// don't actually make the menu until the feature is
// moused-over. pre-generating menus for lots and lots of
// features at load time is way too slow.
var refreshMenu = lang.hitch( this, '_refreshMenu', featDiv );
on( featDiv, 'mouseover', refreshMenu );
if( featDiv.labelDiv )
on( featDiv.labelDiv, 'mouseover', refreshMenu );
dojo.connect( featDiv.contextMenu, 'onMouseMove', refreshMenu );
},
_refreshMenu: function( featDiv ) {
// if we already have a menu generated for this feature,
// give it a new lease on life
if( ! featDiv.contextMenu ) {
featDiv.contextMenu = this._makeFeatureContextMenu( featDiv, this.config.menuTemplate );
}
// give the menu a timeout so that it's cleaned up if it's not used within a certain time
if( featDiv.contextMenuTimeout ) {
window.clearTimeout( featDiv.contextMenuTimeout );
}
var timeToLive = 30000; // clean menus up after 30 seconds
featDiv.contextMenuTimeout = window.setTimeout( function() {
if( featDiv.contextMenu ) {
featDiv.contextMenu.destroyRecursive();
delete featDiv.contextMenu;
}
delete featDiv.contextMenuTimeout;
}, timeToLive );
},
/**
* Make the right-click dijit menu for a feature.
*/
_makeFeatureContextMenu: function( featDiv, menuTemplate ) {
// interpolate template strings in the menuTemplate
menuTemplate = this._processMenuSpec(
dojo.clone( menuTemplate ),
featDiv
);
// render the menu, start it up, and bind it to right-clicks
// both on the feature div and on the label div
var menu = this._renderMenu( menuTemplate, featDiv );
menu.startup();
menu.bindDomNode( featDiv );
if( featDiv.labelDiv )
menu.bindDomNode( featDiv.labelDiv );
return menu;
},
_processMenuSpec: function( spec, featDiv ) {
for( var x in spec ) {
if( typeof spec[x] == 'object' )
spec[x] = this._processMenuSpec( spec[x], featDiv );
else
spec[x] = this.template( featDiv.feature, this._evalConf( featDiv, spec[x], x ) );
}
return spec;
},
/**
* Get the value of a conf variable, evaluating it if it is a
* function. Note: does not template it, that is a separate step.
*
* @private
*/
_evalConf: function( context, confVal, confKey ) {
// list of conf vals that should not be run immediately on the
// feature data if they are functions
var dontRunImmediately = {
action: 1,
click: 1,
content: 1
};
return typeof confVal == 'function' && !dontRunImmediately[confKey]
? confVal( this, context.feature, context )
: confVal;
},
/**
* Render a dijit menu from a specification object.
*
* @param menuTemplate definition of the menu's structure
* @param context {Object} optional object containing the context
* in which any click handlers defined in the menu should be
* invoked, containing thing like what feature is being operated
* upon, the track object that is involved, etc.
* @param parent {dijit.Menu|...} parent menu, if this is a submenu
*/
_renderMenu: function( /**Object*/ menuStructure, /** Object */ context, /** dijit.Menu */ parent ) {
if ( !parent )
parent = new dijitMenu();
for ( key in menuStructure ) {
var spec = menuStructure [ key ];
if ( spec.children ) {
var child = new dijitMenu ();
parent.addChild( child );
parent.addChild( new dijitPopupMenuItem(
{
popup : child,
label : spec.label
}));
this._renderMenu( spec.children, context, child );
}
// only draw other menu items if they have an action.
// drawing menu items that do nothing when clicked
// would frustrate users.
else if( spec.action || spec.url || spec.href ) {
var menuConf = dojo.clone( spec );
menuConf.onClick = this._makeClickHandler( spec, context );
var child = new dijitMenuItem( menuConf );
parent.addChild(child);
}
}
return parent;
},
_openDialog: function( spec, evt, context ) {
context = context || {};
var type = spec.action;
type = type.replace(/Dialog/,'');
var featureName = context.feature && (context.feature.get('name')||context.feature.get('id'));
var dialogOpts = {
"class": "feature-popup-dialog feature-popup-dialog-"+type,
title: spec.title || spec.label || ( featureName ? featureName +' details' : "Details"),
style: dojo.clone( spec.style || {} )
};
var dialog;
// if dialog == xhr, open the link in a dialog
// with the html from the URL just shoved in it
if( type == 'xhr' || type == 'content' ) {
if( type == 'xhr' )
dialogOpts.href = spec.url;
else
dialogOpts.content = this._evalConf( context, spec.content, null );
dialog = new dijitDialog( dialogOpts );
}
// open the link in a dialog with an iframe
else if( type == 'iframe' ) {
dojo.safeMixin( dialogOpts.style, {width: '90%', height: '90%'});
dialogOpts.draggable = false;
var container = dojo.create('div', {}, document.body);
var iframe = dojo.create(
'iframe', {
width: '100%', height: '100%',
tabindex: "0",
style: { border: 'none' },
src: spec.url
}, container
);
dialog = new dijitDialog( dialogOpts, container );
dojo.create( 'a', {
href: spec.url,
target: '_blank',
className: 'dialog-new-window',
title: 'open in new window',
onclick: dojo.hitch(dialog,'hide'),
innerHTML: spec.url
}, dialog.titleBar );
aspect.after( dialog, 'layout', function() {
// hitch a ride on the dialog box's
// layout function, which is called on
// initial display, and when the window
// is resized, to keep the iframe
// sized to fit exactly in it.
var cDims = domGeom.getMarginBox( dialog.domNode );
iframe.width = cDims.w;
iframe.height = iframe.height = cDims.h - domGeom.getMarginBox(dialog.titleBar).h - 2;
});
}
aspect.after( dialog, 'hide', function() { dialog.destroyRecursive(); });
dialog.show();
},
_makeClickHandler: function( inputSpec, context ) {
var track = this;
if( typeof inputSpec == 'function' ) {
inputSpec = { action: inputSpec };
}
else if( typeof inputSpec == 'undefined' ) {
console.error("Undefined click specification, cannot make click handler");
return function() {};
}