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<title>d3heatmap</title>
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binding.renderValue(el, data.x, initResult);
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/*
/ Shiny 1.4 bumped jQuery from 1.x to 3.x which means jQuery's
/ on-ready handler (i.e., $(fn)) is now asyncronous (i.e., it now
/ really means $(setTimeout(fn)).
/ https://jquery.com/upgrade-guide/3.0/#breaking-change-document-ready-handlers-are-now-asynchronous
/
/ Since Shiny uses $() to schedule initShiny, shiny>=1.4 calls initShiny
/ one tick later than it did before, which means staticRender() is
/ called renderValue() earlier than (advanced) widget authors might be expecting.
/ https://github.com/rstudio/shiny/issues/2630
/
/ For a concrete example, leaflet has some methods (e.g., updateBounds)
/ which reference Shiny methods registered in initShiny (e.g., setInputValue).
/ Since leaflet is privy to this life-cycle, it knows to use setTimeout() to
/ delay execution of those methods (until Shiny methods are ready)
/ https://github.com/rstudio/leaflet/blob/18ec981/javascript/src/index.js#L266-L268
/
/ Ideally widget authors wouldn't need to use this setTimeout() hack that
/ leaflet uses to call Shiny methods on a staticRender(). In the long run,
/ the logic initShiny should be broken up so that method registration happens
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*/
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document.addEventListener("DOMContentLoaded", function() {
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maybeStaticRenderLater();
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maybeStaticRenderLater();
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window.HTMLWidgets.dataframeToD3 = function(df) {
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results.push(item);
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<style type="text/css">body.theme-dark {
background-color: #333 !important;
}
.link {
fill: none;
}
.theme-dark .link {
}
.d3heatmap {
position: relative;
width: 820px;
height: 700px;
overflow: hidden;
}
.d3heatmap .domain {
fill: none;
stroke: none;
}
.d3heatmap .axis {
overflow: hidden;
}
.d3heatmap .axis line {
fill: none;
stroke: #AAA;
stroke-width: 1px;
shape-rendering: crispEdges;
}
.d3heatmap .axis text, .d3heatmap-tip {
font-size: 15px;
font-family: Ubuntu Sans, Segoe UI, Lucida Grande, sans-serif;
}
.d3heatmap .axis rect {
cursor: pointer;
}
.inner {
position: relative;
}
.info {
position: absolute;
left: 20px;
top: 90px;
width: 160px;
height: 140px;
text-align: right;
font-size: 40px;
padding-top: 118px;
}
.d3heatmap text {
cursor: default;
}
.d3heatmap .brush .extent{
fill-opacity: 0.15;
stroke-width: 1px;
}
.colDend {
position: absolute;
overflow: hidden;
}
.rowDend {
position: absolute;
overflow: hidden;
}
.colormap {
position: absolute;
overflow: hidden;
}
.theme-dark text {
fill: #E2E2E2;
}
.highlighting .colormap .datapt {
opacity: 0.2;
}
.highlighting .colormap .datapt.highlight {
opacity: 1;
}
.highlighting .axis g.tick.faded {
opacity: 0.4 !important;
}
.d3heatmap-tip {
font-size: 13px;
color: white;
background-color: #444;
padding: 6px 12px;
box-shadow: 3px 3px 5px 0px rgba(0, 0, 0, 0.22);
}
.theme-dark .d3heatmap-tip {
background-color: white;
color: #444;
}
.d3heatmap-tip table {
border-collapse: separate;
border-spacing: 2px;
}
.d3heatmap-tip th, .d3heatmap-tip td {
padding: 0 1px;
}
</style>
<script>function heatmap(selector, data, options) {
// ==== BEGIN HELPERS =================================
function htmlEscape(str) {
return (str+"").replace(/&/g, "&").replace(/</g, "<").replace(/>/g, ">");
}
// Given a list of widths/heights and a total width/height, provides
// easy access to the absolute top/left/width/height of any individual
// grid cell. Optionally, a single cell can be specified as a "fill"
// cell, meaning it will take up any remaining width/height.
//
// rows and cols are arrays that contain numeric pixel dimensions,
// and up to one "*" value.
function GridSizer(widths, heights, /*optional*/ totalWidth, /*optional*/ totalHeight) {
this.widths = widths;
this.heights = heights;
var fillColIndex = null;
var fillRowIndex = null;
var usedWidth = 0;
var usedHeight = 0;
var i;
for (i = 0; i < widths.length; i++) {
if (widths[i] === "*") {
if (fillColIndex !== null) {
throw new Error("Only one column can be designated as fill");
}
fillColIndex = i;
} else {
usedWidth += widths[i];
}
}
if (fillColIndex !== null) {
widths[fillColIndex] = totalWidth - usedWidth;
} else {
if (typeof(totalWidth) === "number" && totalWidth !== usedWidth) {
throw new Error("Column widths don't add up to total width");
}
}
for (i = 0; i < heights.length; i++) {
if (heights[i] === "*") {
if (fillRowIndex !== null) {
throw new Error("Only one row can be designated as fill");
}
fillRowIndex = i;
} else {
usedHeight += heights[i];
}
}
if (fillRowIndex !== null) {
heights[fillRowIndex] = totalHeight - usedHeight;
} else {
if (typeof(totalHeight) === "number" && totalHeight !== usedHeight) {
throw new Error("Column heights don't add up to total height");
}
}
}
GridSizer.prototype.getCellBounds = function(x, y) {
if (x < 0 || x >= this.widths.length || y < 0 || y >= this.heights.length)
throw new Error("Invalid cell bounds");
var left = 0;
for (var i = 0; i < x; i++) {
left += this.widths[i];
}
var top = 0;
for (var j = 0; j < y; j++) {
top += this.heights[j];
}
return {
width: this.widths[x],
height: this.heights[y],
top: top,
left: left
}
}
// ==== END HELPERS ===================================
var el = d3.select(selector);
var bbox = el.node().getBoundingClientRect();
var Controller = function() {
this._events = d3.dispatch("highlight", "datapoint_hover", "transform");
this._highlight = {x: null, y: null};
this._datapoint_hover = {x: null, y: null, value: null};
this._transform = null;
};
(function() {
this.highlight = function(x, y) {
// Copy for safety
if (!arguments.length) return {x: this._highlight.x, y: this._highlight.y};
if (arguments.length == 1) {
this._highlight = x;
} else {
this._highlight = {x: x, y: y};
}
this._events.highlight.call(this, this._highlight);
};
this.datapoint_hover = function(_) {
if (!arguments.length) return this._datapoint_hover;
this._datapoint_hover = _;
this._events.datapoint_hover.call(this, _);
};
this.transform = function(_) {
if (!arguments.length) return this._transform;
this._transform = _;
this._events.transform.call(this, _);
};
this.on = function(evt, callback) {
this._events.on(evt, callback);
};
}).call(Controller.prototype);
var controller = new Controller();
// Set option defaults
var opts = {};
options = options || {};
opts.width = options.width || bbox.width;
opts.height = options.height || bbox.height;
opts.xclust_height = options.xclust_height || opts.height * 0.12;
opts.yclust_width = options.yclust_width || opts.width * 0.12;
opts.link_color = opts.link_color || "#AAA";
opts.xaxis_height = options.xaxis_height || 80;
opts.yaxis_width = options.yaxis_width || 120;
opts.axis_padding = options.axis_padding || 6;
opts.show_grid = options.show_grid;
if (typeof(opts.show_grid) === 'undefined') {
opts.show_grid = true;
}
opts.brush_color = options.brush_color || "#0000FF";
opts.xaxis_font_size = options.xaxis_font_size;
opts.yaxis_font_size = options.yaxis_font_size;
opts.anim_duration = options.anim_duration;
if (typeof(opts.anim_duration) === 'undefined') {
opts.anim_duration = 500;
}
if (!data.rows) {
opts.yclust_width = 0;
}
if (!data.cols) {
opts.xclust_height = 0;
}
var gridSizer = new GridSizer(
[opts.yclust_width, "*", opts.yaxis_width],
[opts.xclust_height, "*", opts.xaxis_height],
opts.width,
opts.height
);
var colormapBounds = gridSizer.getCellBounds(1, 1);
var colDendBounds = gridSizer.getCellBounds(1, 0);
var rowDendBounds = gridSizer.getCellBounds(0, 1);
var yaxisBounds = gridSizer.getCellBounds(2, 1);
var xaxisBounds = gridSizer.getCellBounds(1, 2);
function cssify(styles) {
return {
position: "absolute",
top: styles.top + "px",
left: styles.left + "px",
width: styles.width + "px",
height: styles.height + "px"
};
}
// Create DOM structure
(function() {
var inner = el.append("div").classed("inner", true);
var info = inner.append("div").classed("info", true);
var colDend = inner.append("svg").classed("dendrogram colDend", true).style(cssify(colDendBounds));
var rowDend = inner.append("svg").classed("dendrogram rowDend", true).style(cssify(rowDendBounds));
var colmap = inner.append("svg").classed("colormap", true).style(cssify(colormapBounds));
var xaxis = inner.append("svg").classed("axis xaxis", true).style(cssify(xaxisBounds));
var yaxis = inner.append("svg").classed("axis yaxis", true).style(cssify(yaxisBounds));
// Hack the width of the x-axis to allow x-overflow of rotated labels; the
// QtWebkit viewer won't allow svg elements to overflow:visible.
xaxis.style("width", (opts.width - opts.yclust_width) + "px");
xaxis
.append("defs")
.append("clipPath").attr("id", "xaxis-clip")
.append("polygon")
.attr("points", "" + [
[0, 0],
[xaxisBounds.width, 0],
[xaxisBounds.width + yaxisBounds.width, xaxisBounds.height],
[0, xaxisBounds.height]
]);
xaxis.node(0).setAttribute("clip-path", "url(#xaxis-clip)");
inner.on("click", function() {
controller.highlight(null, null);
});
controller.on('highlight.inner', function(hl) {
inner.classed('highlighting',
typeof(hl.x) === 'number' || typeof(hl.y) === 'number');
});
})();
var row = !data.rows ? null : dendrogram(el.select('svg.rowDend'), data.rows, false, rowDendBounds.width, rowDendBounds.height, opts.axis_padding);
var col = !data.cols ? null : dendrogram(el.select('svg.colDend'), data.cols, true, colDendBounds.width, colDendBounds.height, opts.axis_padding);
var colormap = colormap(el.select('svg.colormap'), data.matrix, colormapBounds.width, colormapBounds.height);
var xax = axisLabels(el.select('svg.xaxis'), data.cols || data.matrix.cols, true, xaxisBounds.width, xaxisBounds.height, opts.axis_padding);
var yax = axisLabels(el.select('svg.yaxis'), data.rows || data.matrix.rows, false, yaxisBounds.width, yaxisBounds.height, opts.axis_padding);
function colormap(svg, data, width, height) {
// Check for no data
if (data.length === 0)
return function() {};
if (!opts.show_grid) {
svg.style("shape-rendering", "crispEdges");
}
var cols = data.dim[1];
var rows = data.dim[0];
var merged = data.merged;
var x = d3.scale.linear().domain([0, cols]).range([0, width]);
var y = d3.scale.linear().domain([0, rows]).range([0, height]);
var tip = d3.tip()
.attr('class', 'd3heatmap-tip')
.html(function(d, i) {
return "<table>" +
"<tr><th align=\"right\">Row</th><td>" + htmlEscape(data.rows[d.row]) + "</td></tr>" +
"<tr><th align=\"right\">Column</th><td>" + htmlEscape(data.cols[d.col]) + "</td></tr>" +
"<tr><th align=\"right\">Value</th><td>" + htmlEscape(d.label) + "</td></tr>" +
"</table>";
})
.direction("se")
.style("position", "fixed");
var brush = d3.svg.brush()
.x(x)
.y(y)
.clamp([true, true])
.on('brush', function() {
var extent = brush.extent();
extent[0][0] = Math.round(extent[0][0]);
extent[0][1] = Math.round(extent[0][1]);
extent[1][0] = Math.round(extent[1][0]);
extent[1][1] = Math.round(extent[1][1]);
d3.select(this).call(brush.extent(extent));
})
.on('brushend', function() {
if (brush.empty()) {
controller.transform({
scale: [1,1],
translate: [0,0],
extent: [[0,0],[cols,rows]]
});
} else {
var tf = controller.transform();
var ex = brush.extent();
var scale = [
cols / (ex[1][0] - ex[0][0]),
rows / (ex[1][1] - ex[0][1])
];
var translate = [
ex[0][0] * (width / cols) * scale[0] * -1,
ex[0][1] * (height / rows) * scale[1] * -1
];
controller.transform({scale: scale, translate: translate, extent: ex});
}
brush.clear();
d3.select(this).call(brush).select(".brush .extent")
.style({fill: opts.brush_color, stroke: opts.brush_color});
});
svg = svg
.attr("width", width)
.attr("height", height);
var rect = svg.selectAll("rect").data(merged);
rect.enter().append("rect").classed("datapt", true)
.property("colIndex", function(d, i) { return i % cols; })
.property("rowIndex", function(d, i) { return Math.floor(i / cols); })
.property("value", function(d, i) { return d.value; })
.attr("fill", function(d) {
if (!d.color) {
return "transparent";
}
return d.color;
});
rect.exit().remove();
rect.append("title")
.text(function(d, i) { return d.label; });
rect.call(tip);
var spacing;
if (typeof(opts.show_grid) === 'number') {
spacing = opts.show_grid;
} else if (!!opts.show_grid) {
spacing = 0.25;
} else {
spacing = 0;
}
function draw(selection) {
selection
.attr("x", function(d, i) {
return x(i % cols);
})
.attr("y", function(d, i) {
return y(Math.floor(i / cols));
})
.attr("width", (x(1) - x(0)) - spacing)
.attr("height", (y(1) - y(0)) - spacing);
}
draw(rect);
controller.on('transform.colormap', function(_) {
x.range([_.translate[0], width * _.scale[0] + _.translate[0]]);
y.range([_.translate[1], height * _.scale[1] + _.translate[1]]);
draw(rect.transition().duration(opts.anim_duration).ease("linear"));
});
var brushG = svg.append("g")
.attr('class', 'brush')
.call(brush)
.call(brush.event);
brushG.select("rect.background")
.on("mouseenter", function() {
tip.style("display", "block");
})
.on("mousemove", function() {
var e = d3.event;
var offsetX = d3.event.offsetX;
var offsetY = d3.event.offsetY;
if (typeof(offsetX) === "undefined") {
// Firefox 38 and earlier
var target = e.target || e.srcElement;
var rect = target.getBoundingClientRect();
offsetX = e.clientX - rect.left,
offsetY = e.clientY - rect.top;
}
var col = Math.floor(x.invert(offsetX));
var row = Math.floor(y.invert(offsetY));
var label = merged[row*cols + col].label;
tip.show({col: col, row: row, label: label}).style({
top: d3.event.clientY + 15 + "px",
left: d3.event.clientX + 15 + "px",
opacity: 0.9
});
controller.datapoint_hover({col:col, row:row, label:label});
})
.on("mouseleave", function() {
tip.hide().style("display", "none");
controller.datapoint_hover(null);
});
controller.on('highlight.datapt', function(hl) {
rect.classed('highlight', function(d, i) {
return (this.rowIndex === hl.y) || (this.colIndex === hl.x);
});
});
}
function axisLabels(svg, data, rotated, width, height, padding) {
svg = svg.append('g');
// The data variable is either cluster info, or a flat list of names.
// If the former, transform it to simply a list of names.
var leaves;
if (data.children) {
leaves = d3.layout.cluster().nodes(data)
.filter(function(x) { return !x.children; })
.map(function(x) { return x.label + ""; });
} else if (data.length) {
leaves = data;
}
// Define scale, axis
var scale = d3.scale.ordinal()
.domain(leaves)
.rangeBands([0, rotated ? width : height]);
var axis = d3.svg.axis()
.scale(scale)
.orient(rotated ? "bottom" : "right")
.outerTickSize(0)
.tickPadding(padding)
.tickValues(leaves);
// Create the actual axis
var axisNodes = svg.append("g")
.attr("transform", rotated ? "translate(0," + padding + ")" : "translate(" + padding + ",0)")
.call(axis);
var fontSize = opts[(rotated ? 'x' : 'y') + 'axis_font_size']
|| Math.min(18, Math.max(9, scale.rangeBand() - (rotated ? 11: 8))) + "px";
axisNodes.selectAll("text").style("font-size", fontSize);
var mouseTargets = svg.append("g")
.selectAll("g").data(leaves);
mouseTargets
.enter()
.append("g").append("rect")
.attr("transform", rotated ? "rotate(45),translate(0,0)" : "")
.attr("fill", "transparent")
.on("click", function(d, i) {
var dim = rotated ? 'x' : 'y';
var hl = controller.highlight() || {x:null, y:null};
if (hl[dim] == i) {
// If clicked already-highlighted row/col, then unhighlight
hl[dim] = null;
controller.highlight(hl);
} else {
hl[dim] = i;
controller.highlight(hl);
}
d3.event.stopPropagation();
});
function layoutMouseTargets(selection) {
selection
.attr("transform", function(d, i) {
var x = rotated ? scale(d) + scale.rangeBand()/2 : 0;
var y = rotated ? padding + 6 : scale(d);
return "translate(" + x + "," + y + ")";
})
.selectAll("rect")
.attr("height", scale.rangeBand() / (rotated ? 1.414 : 1))
.attr("width", rotated ? height * 1.414 * 1.2 : width);
}
layoutMouseTargets(mouseTargets);
if (rotated) {
axisNodes.selectAll("text")
.attr("transform", "rotate(45),translate(6, 0)")
.style("text-anchor", "start");
}
controller.on('highlight.axis-' + (rotated ? 'x' : 'y'), function(hl) {
var ticks = axisNodes.selectAll('.tick');
var selected = hl[rotated ? 'x' : 'y'];
if (typeof(selected) !== 'number') {
ticks.classed('faded', false);
return;
}
ticks.classed('faded', function(d, i) {
return i !== selected;
});
});
controller.on('transform.axis-' + (rotated ? 'x' : 'y'), function(_) {
var dim = rotated ? 0 : 1;
//scale.domain(leaves.slice(_.extent[0][dim], _.extent[1][dim]));
var rb = [_.translate[dim], (rotated ? width : height) * _.scale[dim] + _.translate[dim]];
scale.rangeBands(rb);
var tAxisNodes = axisNodes.transition().duration(opts.anim_duration).ease('linear');
tAxisNodes.call(axis);
// Set text-anchor on the non-transitioned node to prevent jumpiness
// in RStudio Viewer pane
axisNodes.selectAll("text").style("text-anchor", "start");
tAxisNodes.selectAll("g")
.style("opacity", function(d, i) {
if (i >= _.extent[0][dim] && i < _.extent[1][dim]) {
return 1;
} else {
return 0;
}
});
tAxisNodes
.selectAll("text")
.style("text-anchor", "start");
mouseTargets.transition().duration(opts.anim_duration).ease('linear')
.call(layoutMouseTargets)
.style("opacity", function(d, i) {
if (i >= _.extent[0][dim] && i < _.extent[1][dim]) {
return 1;
} else {
return 0;
}
});
});
}
function edgeStrokeWidth(node) {
if (node.edgePar && node.edgePar.lwd)
return node.edgePar.lwd;
else
return 1;
}
function maxChildStrokeWidth(node, recursive) {
var max = 0;
for (var i = 0; i < node.children.length; i++) {
if (recursive) {
max = Math.max(max, maxChildStrokeWidth(node.children[i], true));
}
max = Math.max(max, edgeStrokeWidth(node.children[i]));
}
return max;
}
function dendrogram(svg, data, rotated, width, height, padding) {
var topLineWidth = maxChildStrokeWidth(data, false);
var x = d3.scale.linear()
.domain([data.height, 0])
.range([topLineWidth/2, width-padding]);
var y = d3.scale.linear()
.domain([0, height])
.range([0, height]);
var cluster = d3.layout.cluster()
.separation(function(a, b) { return 1; })
.size([rotated ? width : height, NaN]);
var transform = "translate(1,0)";
if (rotated) {
// Flip dendrogram vertically
x.range([topLineWidth/2, -height+padding+2]);
// Rotate
transform = "rotate(-90) translate(-2,0)";
}
var dendrG = svg
.attr("width", width)
.attr("height", height)
.append("g")
.attr("transform", transform);
var nodes = cluster.nodes(data),
links = cluster.links(nodes);
// I'm not sure why, but after the heatmap loads the "links"
// array mutates to much smaller values. I can't figure out
// what's doing it, so instead we just make a deep copy of
// the parts we want.
var links1 = links.map(function(link, i) {
return {
source: {x: link.source.x, y: link.source.height},
target: {x: link.target.x, y: link.target.height},
edgePar: link.target.edgePar
};
});
var lines = dendrG.selectAll("polyline").data(links1);
lines
.enter().append("polyline")
.attr("class", "link")
.attr("stroke", function(d, i) {
if (!d.edgePar.col) {
return opts.link_color;
} else {
return d.edgePar.col;
}
})
.attr("stroke-width", edgeStrokeWidth)
.attr("stroke-dasharray", function(d, i) {
var pattern;
switch (d.edgePar.lty) {
case 6:
pattern = [3,3,5,3];
break;
case 5:
pattern = [15,5];
break;
case 4:
pattern = [2,4,4,4];
break;
case 3:
pattern = [2,4];
break;
case 2:
pattern = [4,4];
break;
case 1:
default:
pattern = [];
break;
}
for (var i = 0; i < pattern.length; i++) {
pattern[i] = pattern[i] * (d.edgePar.lwd || 1);
}
return pattern.join(",");
});
function draw(selection) {
function elbow(d, i) {
return x(d.source.y) + "," + y(d.source.x) + " " +
x(d.source.y) + "," + y(d.target.x) + " " +
x(d.target.y) + "," + y(d.target.x);
}
selection
.attr("points", elbow);
}
controller.on('transform.dendr-' + (rotated ? 'x' : 'y'), function(_) {
var scaleBy = _.scale[rotated ? 0 : 1];
var translateBy = _.translate[rotated ? 0 : 1];
y.range([translateBy, height * scaleBy + translateBy]);
draw(lines.transition().duration(opts.anim_duration).ease("linear"));
});
draw(lines);
}
var dispatcher = d3.dispatch('hover', 'click');
controller.on("datapoint_hover", function(_) {
dispatcher.hover({data: _});
});
function on_col_label_mouseenter(e) {
controller.highlight(+d3.select(this).attr("index"), null);
}
function on_col_label_mouseleave(e) {
controller.highlight(null, null);
}
function on_row_label_mouseenter(e) {
controller.highlight(null, +d3.select(this).attr("index"));
}
function on_row_label_mouseleave(e) {
controller.highlight(null, null);
}
return {
on: function(type, listener) {
dispatcher.on(type, listener);
return this;
}
};
}
</script>
<script>// d3.tip
// Copyright (c) 2013 Justin Palmer
//
// Tooltips for d3.js SVG visualizations
(function (root, factory) {
if (typeof define === 'function' && define.amd) {
// AMD. Register as an anonymous module with d3 as a dependency.
define(['d3'], factory)
} else if (typeof module === 'object' && module.exports) {
// CommonJS
module.exports = function(d3) {
d3.tip = factory(d3)
return d3.tip
}
} else {
// Browser global.
root.d3.tip = factory(root.d3)
}
}(this, function (d3) {
// Public - contructs a new tooltip
//
// Returns a tip
return function() {
var direction = d3_tip_direction,
offset = d3_tip_offset,
html = d3_tip_html,
node = initNode(),
svg = null,
point = null,
target = null
function tip(vis) {
svg = getSVGNode(vis)
point = svg.createSVGPoint()
document.body.appendChild(node)
}
// Public - show the tooltip on the screen
//
// Returns a tip
tip.show = function() {
var args = Array.prototype.slice.call(arguments)
if(args[args.length - 1] instanceof SVGElement) target = args.pop()
var content = html.apply(this, args),
poffset = offset.apply(this, args),
dir = direction.apply(this, args),
nodel = d3.select(node),
i = directions.length,
coords,
scrollTop = document.documentElement.scrollTop || document.body.scrollTop,
scrollLeft = document.documentElement.scrollLeft || document.body.scrollLeft
nodel.html(content)
.style({ opacity: 1, 'pointer-events': 'all' })
while(i--) nodel.classed(directions[i], false)
coords = direction_callbacks.get(dir).apply(this)
nodel.classed(dir, true).style({
top: (coords.top + poffset[0]) + scrollTop + 'px',
left: (coords.left + poffset[1]) + scrollLeft + 'px'
})
return tip
}
// Public - hide the tooltip
//
// Returns a tip
tip.hide = function() {
var nodel = d3.select(node)
nodel.style({ opacity: 0, 'pointer-events': 'none' })
return tip
}
// Public: Proxy attr calls to the d3 tip container. Sets or gets attribute value.
//
// n - name of the attribute
// v - value of the attribute
//
// Returns tip or attribute value
tip.attr = function(n, v) {
if (arguments.length < 2 && typeof n === 'string') {
return d3.select(node).attr(n)
} else {
var args = Array.prototype.slice.call(arguments)
d3.selection.prototype.attr.apply(d3.select(node), args)
}
return tip
}
// Public: Proxy style calls to the d3 tip container. Sets or gets a style value.
//
// n - name of the property
// v - value of the property
//
// Returns tip or style property value
tip.style = function(n, v) {
if (arguments.length < 2 && typeof n === 'string') {
return d3.select(node).style(n)
} else {
var args = Array.prototype.slice.call(arguments)
d3.selection.prototype.style.apply(d3.select(node), args)
}
return tip
}
// Public: Set or get the direction of the tooltip
//
// v - One of n(north), s(south), e(east), or w(west), nw(northwest),
// sw(southwest), ne(northeast) or se(southeast)
//
// Returns tip or direction
tip.direction = function(v) {
if (!arguments.length) return direction
direction = v == null ? v : d3.functor(v)
return tip
}
// Public: Sets or gets the offset of the tip
//
// v - Array of [x, y] offset
//
// Returns offset or
tip.offset = function(v) {
if (!arguments.length) return offset
offset = v == null ? v : d3.functor(v)
return tip
}
// Public: sets or gets the html value of the tooltip
//
// v - String value of the tip
//
// Returns html value or tip
tip.html = function(v) {
if (!arguments.length) return html
html = v == null ? v : d3.functor(v)
return tip
}
function d3_tip_direction() { return 'n' }
function d3_tip_offset() { return [0, 0] }
function d3_tip_html() { return ' ' }
var direction_callbacks = d3.map({
n: direction_n,
s: direction_s,
e: direction_e,
w: direction_w,
nw: direction_nw,
ne: direction_ne,
sw: direction_sw,
se: direction_se
}),
directions = direction_callbacks.keys()
function direction_n() {
var bbox = getScreenBBox()
return {
top: bbox.n.y - node.offsetHeight,
left: bbox.n.x - node.offsetWidth / 2
}
}
function direction_s() {
var bbox = getScreenBBox()
return {
top: bbox.s.y,
left: bbox.s.x - node.offsetWidth / 2
}
}
function direction_e() {
var bbox = getScreenBBox()
return {
top: bbox.e.y - node.offsetHeight / 2,
left: bbox.e.x
}
}
function direction_w() {
var bbox = getScreenBBox()
return {
top: bbox.w.y - node.offsetHeight / 2,
left: bbox.w.x - node.offsetWidth
}
}
function direction_nw() {
var bbox = getScreenBBox()
return {
top: bbox.nw.y - node.offsetHeight,
left: bbox.nw.x - node.offsetWidth
}
}
function direction_ne() {
var bbox = getScreenBBox()
return {
top: bbox.ne.y - node.offsetHeight,
left: bbox.ne.x
}
}
function direction_sw() {
var bbox = getScreenBBox()
return {
top: bbox.sw.y,
left: bbox.sw.x - node.offsetWidth
}
}
function direction_se() {
var bbox = getScreenBBox()
return {
top: bbox.se.y,
left: bbox.e.x
}
}
function initNode() {
var node = d3.select(document.createElement('div'))
node.style({
position: 'absolute',
top: 0,
opacity: 0,
'pointer-events': 'none',
'box-sizing': 'border-box'
})
return node.node()
}
function getSVGNode(el) {
el = el.node()
if(el.tagName.toLowerCase() === 'svg')
return el
return el.ownerSVGElement
}
// Private - gets the screen coordinates of a shape
//
// Given a shape on the screen, will return an SVGPoint for the directions
// n(north), s(south), e(east), w(west), ne(northeast), se(southeast), nw(northwest),
// sw(southwest).
//
// +-+-+
// | |
// + +
// | |
// +-+-+
//
// Returns an Object {n, s, e, w, nw, sw, ne, se}
function getScreenBBox() {
var targetel = target || d3.event.target,
bbox = {},
matrix = targetel.getScreenCTM(),
tbbox = targetel.getBBox(),
width = tbbox.width,
height = tbbox.height,
x = tbbox.x,
y = tbbox.y
point.x = x
point.y = y
bbox.nw = point.matrixTransform(matrix)
point.x += width
bbox.ne = point.matrixTransform(matrix)
point.y += height
bbox.se = point.matrixTransform(matrix)
point.x -= width
bbox.sw = point.matrixTransform(matrix)
point.y -= height / 2
bbox.w = point.matrixTransform(matrix)
point.x += width
bbox.e = point.matrixTransform(matrix)
point.x -= width / 2
point.y -= height / 2
bbox.n = point.matrixTransform(matrix)
point.y += height
bbox.s = point.matrixTransform(matrix)
return bbox
}
return tip
};
}));
</script>
<script>HTMLWidgets.widget({
name: 'd3heatmap',
type: 'output',
initialize: function(el, width, height) {
return {
lastTheme: null,
lastValue: null
};
},
renderValue: function(el, x, instance) {
this.doRenderValue(el, x, instance);
},
// Need dedicated helper function that can be called by both renderValue
// and resize. resize can't call this.renderValue because that will be
// routed to the Shiny wrapper method from htmlwidgets, which expects the
// wrapper data object, not x.
doRenderValue: function(el, x, instance) {
var self = this;
instance.lastValue = x;
if (instance.lastTheme && instance.lastTheme != x.theme) {
d3.select(document.body).classed("theme-" + instance.lastTheme, false);
}
if (x.theme) {
d3.select(document.body).classed("theme-" + x.theme, true);
}
el.innerHTML = "";
this.loadImage(x.image, function(imgData, w, h) {
if (w !== x.matrix.dim[0] || h !== x.matrix.dim[1]) {
throw new Error("Color dimensions didn't match data dimensions")
}
var merged = [];
for (var i = 0; i < x.matrix.data.length; i++) {
var r = imgData[i*4];
var g = imgData[i*4+1];
var b = imgData[i*4+2];
var a = imgData[i*4+3];
merged.push({
label: x.matrix.data[i],
color: "rgba(" + [r,g,b,a/255].join(",") + ")"
})
}
x.matrix.merged = merged;
//console.log(JSON.stringify({merged: x.matrix.merged}, null, " "));
var hm = heatmap(el, x, x.options);
if (window.Shiny) {
var id = self.getId(el);
hm.on('hover', function(e) {
Shiny.onInputChange(id + '_hover', !e.data ? e.data : {
label: e.data.label,
row: x.matrix.rows[e.data.row],
col: x.matrix.cols[e.data.col]
});
});
/* heatmap doesn't currently send click, since it means zoom-out
hm.on('click', function(e) {
Shiny.onInputChange(id + '_click', !e.data ? e.data : {
label: e.data.label,
row: e.data.row + 1,
col: e.data.col + 1
});
});
*/
}
});
},
resize: function(el, width, height, instance) {
if (instance.lastValue) {
this.doRenderValue(el, instance.lastValue, instance);
}
},
loadImage: function(uri, callback) {
var img = new Image();
img.onload = function() {
// Save size
w = img.width;
h = img.height;
// Create a dummy canvas to extract the image data
var imgDataCanvas = document.createElement("canvas");
imgDataCanvas.width = w;
imgDataCanvas.height = h;
imgDataCanvas.style.display = "none";
document.body.appendChild(imgDataCanvas);
var imgDataCtx = imgDataCanvas.getContext("2d");
imgDataCtx.drawImage(img, 0, 0);
// Save the image data.
imgData = imgDataCtx.getImageData(0, 0, w, h).data;
// Done with the canvas, remove it from the page so it can be gc'd.
document.body.removeChild(imgDataCanvas);
callback(imgData, w, h);
};
img.src = uri;
}
});
</script>
</head>
<body style="background-color: white;">
<div id="htmlwidget_container">
<div id="htmlwidget-8026547d563bf44b8312" class="d3heatmap html-widget" style="width:960px;height:500px;">
</div>
</div>
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