I have made a map in d3 for usa. Now I want to apply different color as soon as i move my mouse on the province area or from first have many colors to the map.
My code is :
<script type="text/javascript">
var w = 1560;
var h = 900;
var color = d3.scale.category10();
var proj = d3.geo.mercator();
var path = d3.geo.path().projection(proj);
var t = proj.translate(); // the projection's default translation
var s = proj.scale() // the projection's default scale
var map = d3.select("#vis").append("svg:svg")
.attr("width", w)
.attr("height", h)
.call(d3.behavior.zoom().on("zoom", redraw));
var axes = map.append("svg:g").attr("id", "axes");
var xAxis = axes.append("svg:line")
.attr("x1", t[0])
.attr("y1", 0)
.attr("x2", t[0])
.attr("y2", h);
var yAxis = axes.append("svg:line")
.attr("x1", 0)
.attr("y1", t[1])
.attr("x2", w)
.attr("y2", t[1]);
var uk = map.append("svg:g").attr("id", "uk");
d3.json("tryusa.json", function (json) {
uk.selectAll("path")
.data(json.features).on("mouseover", function () { d3.select(this).style("fill", "aqua"); })
.enter().append("svg:path")
.attr("d", path)
.on("click", click)
.on("click", function () { window.open("Default3.aspx") })
.append("svg:title")
.text(function (d) { return d.properties.name; })
});
svg.selectAll(".subunit")
.data(topojson.object(uk, uk.objects.subunits).geometries)
.enter().append("path")
.attr("class", function (d) { return "subunit " + d.id; })
;
function redraw() {
var tx = t[0] * d3.event.scale + d3.event.translate[0];
var ty = t[1] * d3.event.scale + d3.event.translate[1];
proj.translate([tx, ty]);
// now we determine the projection's new scale, but there's a problem:
// the map doesn't 'zoom onto the mouse point'
proj.scale(s * d3.event.scale);
// redraw the map
uk.selectAll("path").attr("d", path);
// redraw the x axis
xAxis.attr("x1", tx).attr("x2", tx);
// redraw the y axis
yAxis.attr("y1", ty).attr("y2", ty);
}
</script>
我尝试了一些类似鼠标悬停事件的事情,但我无法得到结果。
我还尝试使用内置功能自动显示不同的颜色。但我也无法做到这一点。我是 d3 的新手,请您帮帮我。颜色可以放在鼠标悬停事件上或从第一个开始。什么都行。