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add tooltips to sankey #341

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merged 2 commits into from
Apr 13, 2016
Merged

add tooltips to sankey #341

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fc90c6a
add tooltips to sankey
williaster Apr 13, 2016
5577bc2
update tooltip language ('count' --> 'value', 'Link Weight' --> 'Path…
williaster Apr 13, 2016
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6 changes: 5 additions & 1 deletion caravel/assets/stylesheets/caravel.css
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Original file line number Diff line number Diff line change
Expand Up @@ -2,7 +2,11 @@ body {
margin: 0px !important;
}

.alert.alert-danger>.debugger {
.emph {
font-weight: bold;
}

.alert.alert-danger > .debugger {
color: red;
}

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13 changes: 13 additions & 0 deletions caravel/assets/visualizations/sankey.css
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Original file line number Diff line number Diff line change
Expand Up @@ -18,3 +18,16 @@
.sankey .link:hover {
stroke-opacity: .5;
}

.sankey-tooltip {
position: absolute;
width: auto;
background: #ddd;
padding: 10px;
font-size: 12px;
font-weight: 200;
color: #333;
border: 1px solid #fff;
text-align: center;
pointer-events: none;
}
67 changes: 53 additions & 14 deletions caravel/assets/visualizations/sankey.js
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Original file line number Diff line number Diff line change
Expand Up @@ -18,7 +18,7 @@ function sankeyVis(slice) {
var width = slice.width() - margin.left - margin.right;
var height = slice.height() - margin.top - margin.bottom;

var formatNumber = d3.format(",.0f");
var formatNumber = d3.format(",.2f");

div.selectAll("*").remove();
var svg = div.append("svg")
Expand All @@ -27,6 +27,10 @@ function sankeyVis(slice) {
.append("g")
.attr("transform", "translate(" + margin.left + "," + margin.top + ")");

var tooltip = div.append("div")
.attr("class", "sankey-tooltip")
.style("opacity", 0);

var sankey = d3.sankey()
.nodeWidth(15)
.nodePadding(10)
Expand Down Expand Up @@ -56,24 +60,21 @@ function sankeyVis(slice) {

var link = svg.append("g").selectAll(".link")
.data(links)
.enter().append("path")
.enter().append("path")
.attr("class", "link")
.attr("d", path)
.style("stroke-width", function (d) {
return Math.max(1, d.dy);
})
.sort(function (a, b) {
return b.dy - a.dy;
});

link.append("title")
.text(function (d) {
return d.source.name + " → " + d.target.name + "\n" + formatNumber(d.value);
});
})
.on("mouseover", onmouseover)
.on("mouseout", onmouseout);

var node = svg.append("g").selectAll(".node")
.data(nodes)
.enter().append("g")
.enter().append("g")
.attr("class", "node")
.attr("transform", function (d) {
return "translate(" + d.x + "," + d.y + ")";
Expand All @@ -99,10 +100,8 @@ function sankeyVis(slice) {
.style("stroke", function (d) {
return d3.rgb(d.color).darker(2);
})
.append("title")
.text(function (d) {
return d.name + "\n" + formatNumber(d.value);
});
.on("mouseover", onmouseover)
.on("mouseout", onmouseout);

node.append("text")
.attr("x", -6)
Expand All @@ -122,10 +121,50 @@ function sankeyVis(slice) {
.attr("text-anchor", "start");

function dragmove(d) {
d3.select(this).attr("transform", "translate(" + d.x + "," + (d.y = Math.max(0, Math.min(height - d.dy, d3.event.y))) + ")");
d3.select(this)
.attr("transform", "translate(" + d.x + "," + (d.y = Math.max(0, Math.min(height - d.dy, d3.event.y))) + ")");

sankey.relayout();
link.attr("d", path);
}

function getTooltipHtml(d) {
var html;

if (d.sourceLinks) { // is node
html = d.name + " Value: <span class='emph'>" + formatNumber(d.value) + "</span>";
} else {
var val = formatNumber(d.value);
var sourcePercent = d3.round((d.value / d.source.value) * 100, 1);
var targetPercent = d3.round((d.value / d.target.value) * 100, 1);

html = [
"<div class=''>Path Value: <span class='emph'>", val, "</span></div>",
"<div class='percents'>",
"<span class='emph'>", (isFinite(sourcePercent) ? sourcePercent : "100"), "%</span> of ", d.source.name, "<br/>",
"<span class='emph'>" + (isFinite(targetPercent) ? targetPercent : "--") + "%</span> of ", d.target.name, "target",
"</div>"
].join("");
}
return html;
}

function onmouseover(d) {
tooltip
.html(function () { return getTooltipHtml(d); })
.transition()
.duration(200)
.style("left", (d3.event.layerX + 10) + "px")
.style("top", (d3.event.layerY + 10) + "px")
.style("opacity", 0.95);
}

function onmouseout(d) {
tooltip.transition()
.duration(100)
.style("opacity", 0);
}

slice.done(json);
});
};
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