是否有办法在RAW中添加可缩放的树图?使用d3.js的进入-更新-退出模式在RAW中没有意义，所以如果没有这个功能，是否可以在RAW.js中添加d3.js的可缩放树图
添加新图表的RAW文档显示
这样，D3的进入-更新-退出模式不会产生太多影响在RAW的图表中，因为选择总是空的传递给draw函数。因为RAW是一种工具制作非交互式可视化，待详细阐述使用矢量图形工具，这不应该被视为一种限制，但是，相反，作为一种简化图表绘制代码的方法。
我已经能够在RAW中添加可缩放的树图。代码如下:
zoomableTreemap.js
(function(){
var tree = raw.models.tree();
var chart = raw.chart()
.title('Zoomable Treemap')
.description(
"A space filling visualization of data hierarchies and proportion between elements. The different hierarchical levels create visual clusters through the subdivision into rectangles proportionally to each element's value. Treemaps are useful to represent the different proportion of nested hierarchical data structures.<br/>Based on <a href='http://bl.ocks.org/mbostock/4063582'>http://bl.ocks.org/mbostock/4063582</a>")
.thumbnail("/raw/imgs/treemap.png")
.category('Hierarchies')
.model(tree)
var rawWidth = chart.number()
.title('Width')
.defaultValue(100)
.fitToWidth(true)
var rawHeight = chart.number()
.title("Height")
.defaultValue(500)
var padding = chart.number()
.title("Padding")
.defaultValue(0)
var colors = chart.color()
.title("Color scale")
chart.draw(function (selection, root){
root.name = 'ZoomableTree';
var margin = {top: 20, right: 0, bottom: 0, left: 0},
width = +rawWidth(),
height = +rawHeight() - margin.top - margin.bottom,
formatNumber = d3.format(",d"),
transitioning;
var x = d3.scale.linear()
.domain([0, width])
.range([0, width]);
var y = d3.scale.linear()
.domain([0, height])
.range([0, height]);
console.log(padding());
console.log(+padding());
var treemap = d3.layout.treemap()
.padding(+padding())
.children(function(d, depth) { return depth ? null : d._children; })
.sort(function(a, b) { return a.value - b.value; })
.ratio(height / width * 0.5 * (1 + Math.sqrt(5)))
// Values are required in d3 treemap layout
// and our DB table do not have values field in it, so we are going to use 1 for all nodes.
// The value decides the size/area of rectangle in d3 treemap layout so effectively we are going to have
// even sized rectangles
.value(function(d) { return 1; })
.round(false);
var svg = selection
.attr("width", width + margin.left + margin.right)
.attr("height", height + margin.bottom + margin.top)
.style("margin-left", -margin.left + "px")
.style("margin.right", -margin.right + "px")
.append("g")
.attr("transform", "translate(" + margin.left + "," + margin.top + ")")
.style("shape-rendering", "crispEdges")
var grandparent = svg.append("g")
.attr("class", "grandparent");
grandparent.append("rect")
.attr("y", -margin.top)
.attr("width", width)
.attr("height", margin.top)
.style("fill", function (d) { return colors()(d.color); })
.style("stroke","#fff")
grandparent.append("text")
.attr("x", 6)
.attr("y", 6 - margin.top)
.attr("dy", ".75em");
initialize(root);
//console.log(root);
//throw '';
accumulate(root);
layout(root);
display(root);
function initialize(root) {
root.x = root.y = 0;
root.dx = width;
root.dy = height;
root.depth = 0;
}
// Aggregate the values for internal nodes. This is normally done by the
// treemap layout, but not here because of our custom implementation.
// We also take a snapshot of the original children (_children) to avoid
// the children being overwritten when when layout is computed.
function accumulate(d) {
return (d._children = d.children)
? d.value = d.children.reduce(function(p, v) { return p + accumulate(v); }, 0)
: d.value;
}
// Compute the treemap layout recursively such that each group of siblings
// uses the same size (1×1) rather than the dimensions of the parent cell.
// This optimizes the layout for the current zoom state. Note that a wrapper
// object is created for the parent node for each group of siblings so that
// the parent’s dimensions are not discarded as we recurse. Since each group
// of sibling was laid out in 1×1, we must rescale to fit using absolute
// coordinates. This lets us use a viewport to zoom.
function layout(d) {
if (d._children) {
//console.log(d);
//throw 'stop';
treemap.nodes({_children: d._children});
d._children.forEach(function(c) {
//console.log(d);
c.x = d.x + c.x * d.dx;
c.y = d.y + c.y * d.dy;
c.dx *= d.dx;
c.dy *= d.dy;
c.parent = d;
//console.log(c);
layout(c);
});
}
}
function display(d) {
grandparent
.datum(d.parent)
.on("click", transition)
.select("text")
.text(name(d));
var g1 = svg.insert("g", ".grandparent")
.datum(d)
.attr("class", "depth");
var g = g1.selectAll("g")
.data(d._children)
.enter().append("g");
g.filter(function(d) { return d._children; })
.classed("children", true)
.on("click", transition);
g.selectAll(".child")
.data(function(d) { return d._children || [d]; })
.enter().append("rect")
.attr("class", "child")
.call(rect);
g.append("rect")
.attr("class", "parent")
.call(rect)
.append("title")
.text(function(d) { return formatNumber(d.value); })
.style("fill", function (d) { return colors()(d.color); })
.style("stroke","#fff")
g.append("text")
.attr("dy", ".75em")
.text(function(d) { return d.name; })
.call(text);
function transition(d) {
if (transitioning || !d) return;
transitioning = true;
var g2 = display(d),
t1 = g1.transition().duration(750),
t2 = g2.transition().duration(750);
// Update the domain only after entering new elements.
x.domain([d.x, d.x + d.dx]);
y.domain([d.y, d.y + d.dy]);
// Enable anti-aliasing during the transition.
svg.style("shape-rendering", null);
// Draw child nodes on top of parent nodes.
svg.selectAll(".depth").sort(function(a, b) { return a.depth - b.depth; });
// Fade-in entering text.
g2.selectAll("text").style("fill-opacity", 0);
// Transition to the new view.
t1.selectAll("text").call(text).style("fill-opacity", 0);
t2.selectAll("text").call(text).style("fill-opacity", 1);
t1.selectAll("rect").call(rect);
t2.selectAll("rect").call(rect);
// Remove the old node when the transition is finished.
t1.remove().each("end", function() {
svg.style("shape-rendering", "crispEdges");
transitioning = false;
});
}
return g;
}
function text(text) {
text.attr("x", function(d) { return x(d.x) + 6; })
.attr("y", function(d) { return y(d.y) + 6; });
}
function rect(rect) {
rect.attr("x", function(d) { return x(d.x); })
.attr("y", function(d) { return y(d.y); })
.attr("width", function(d) { return x(d.x + d.dx) - x(d.x); })
.attr("height", function(d) { return y(d.y + d.dy) - y(d.y); })
.style("fill", function (d) { return colors()(d.color); })
.style("stroke","#fff");
}
function name(d) {
return d.parent
? name(d.parent) + "." + d.name
: d.name;
}
})
})();
chart.css
#chart {
background: #ddd;
}
text {
pointer-events: none;
}
.grandparent text {
font-weight: bold;
}
rect {
fill: none;
stroke: #fff;
}
rect.parent,
.grandparent rect {
stroke-width: 2px;
}
.grandparent rect {
fill: orange;
}
.grandparent:hover rect {
fill: #ee9700;
}
.children rect.parent,
.grandparent rect {
cursor: pointer;
}
.children rect.parent {
fill: #bbb;
fill-opacity: .5;
}
.children:hover rect.child {
fill: #bbb;
}
index . html
只要在raw的索引页中包含css和js。