Question

我正在尝试创建一个由水平和垂直方向组成的D3树。我希望树的第一级和第二级是水平的，然后每个后续级别在其父级下是垂直的。这是我到目前为止的结果：

<!DOCTYPE html>
<meta charset="utf-8">
<style>

.node {
  cursor: pointer;
}

.node circle {
  fill: #fff;
  stroke: steelblue;
  stroke-width: 1.5px;
}

.node text {
  font: 10px sans-serif;
}

.link {
  fill: none;
  stroke: #ccc;
  stroke-width: 1.5px;
}

</style>
<body>
<script src="http://d3js.org/d3.v3.min.js"></script>
<script>

    var margin = {
    top: 20,
    right: 120,
    bottom: 20,
    left: 120
},
width = 960 - margin.right - margin.left,
    height = 800 - margin.top - margin.bottom;

var i = 0,
    duration = 750,
    root;

var tree = d3.layout.tree()
    .size([height, width]);

var diagonal = d3.svg.diagonal()
    .projection(function (d) {
        return d.depth < 2 ? [d.x, d.y] : [d.y, d.x];
});

var svg = d3.select("body").append("svg")
    .attr("width", width + margin.right + margin.left)
    .attr("height", height + margin.top + margin.bottom)
    .append("g")
    .attr("transform", "translate(" + margin.left + "," + margin.top + ")");


root = {
    "name": "Homepage",
        "children": [{
        "name": "test1",
            "children": [{
            "name": "page",
        }, {
            "name": "page",
        }, {
            "name": "page",
        }, {
            "name": "page",
        }, {
            "name": "page",
        }]
    }, {
        "name": "test2",
            "children": [{
            "name": "page",
        }, {
            "name": "page",
        }, {
            "name": "page",
        }, {
            "name": "page",
        }, {
            "name": "page",
        }]
    }, {
        "name": "test3",
            "children": [{
            "name": "page",
        }, {
            "name": "page",
        }, {
            "name": "page",
        }, {
            "name": "page",
        }, {
            "name": "page",
        }]
    }, {
        "name": "test4",
            "children": [{
            "name": "page",
        }, {
            "name": "page",
        }, {
            "name": "page",
        }, {
            "name": "page",
        }, {
            "name": "page",
        }]
    }]
};
root.x0 = height / 2;
root.y0 = 0;

function collapse(d) {
    if (d.children) {
        d._children = d.children;
        d._children.forEach(collapse);
        d.children = null;
    }
}

update(root);

d3.select(self.frameElement).style("height", "800px");

function update(source) {

    // Compute the new tree layout.
    var nodes = tree.nodes(root).reverse(),
        links = tree.links(nodes);

    // Normalize for fixed-depth.
    nodes.forEach(function (d) {
        if (d.depth < 2) {
            d.y = d.depth * 100
        }
        else {
            d.y = d.parent.x;
        }
    });

    // Update the nodes…
    var node = svg.selectAll("g.node")
        .data(nodes, function (d) {
        return d.id || (d.id = ++i);
    });

    // Enter any new nodes at the parent's previous position.
    var nodeEnter = node.enter().append("g")
        .attr("class", "node")
        .attr("transform", function (d) {
        return "translate(" + source.y0 + "," + source.x0 + ")";
    })
        .on("click", click);

    nodeEnter.append("circle")
        .attr("r", 1e-6)
        .style("fill", function (d) {
        return d._children ? "lightsteelblue" : "#fff";
    });

    nodeEnter.append("text")
        .attr("x", function (d) {
        return d.children || d._children ? -10 : 10;
    })
        .attr("dy", ".35em")
        .attr("text-anchor", function (d) {
        return d.children || d._children ? "end" : "start";
    })
        .text(function (d) {
        return d.name;
    })
        .style("fill-opacity", 1e-6);

    // Transition nodes to their new position.
    var nodeUpdate = node.transition()
        .duration(duration)
        .attr("transform", function (d) {
        return d.depth < 2 ? "translate(" + d.x + "," + d.y + ")" : "translate(" + d.y + "," + d.x + ")";
    });

    nodeUpdate.select("circle")
        .attr("r", 4.5)
        .style("fill", function (d) {
        return d._children ? "lightsteelblue" : "#fff";
    });

    nodeUpdate.select("text")
        .style("fill-opacity", 1);

    // Transition exiting nodes to the parent's new position.
    var nodeExit = node.exit().transition()
        .duration(duration)
        .attr("transform", function (d) {
        return "translate(" + source.y + "," + source.x + ")";
    })
        .remove();

    nodeExit.select("circle")
        .attr("r", 1e-6);

    nodeExit.select("text")
        .style("fill-opacity", 1e-6);

    // Update the links…
    var link = svg.selectAll("path.link")
        .data(links, function (d) {
        return d.target.id;
    });

    // Enter any new links at the parent's previous position.
    link.enter().insert("path", "g")
        .attr("class", "link")
        .attr("d", function (d) {
        var o = {
            x: source.x0,
            y: source.y0
        };
        return diagonal({
            source: o,
            target: o
        });
    });

    // Transition links to their new position.
    link.transition()
        .duration(duration)
        .attr("d", diagonal);

    // Transition exiting nodes to the parent's new position.
    link.exit().transition()
        .duration(duration)
        .attr("d", function (d) {
        var o = {
            x: source.x,
            y: source.y
        };
        return diagonal({
            source: o,
            target: o
        });
    })
        .remove();

    // Stash the old positions for transition.
    nodes.forEach(function (d) {
        d.x0 = d.x;
        d.y0 = d.y;
    });
}

// Toggle children on click.
function click(d) {
    if (d.children) {
        d._children = d.children;
        d.children = null;
    } else {
        d.children = d._children;
        d._children = null;
    }
    update(d);
}

</script>

正如您所看到的那样，第3级实际上并不位于父级之下，尽管我设法将其放在与父级相同的“列”中，但垂直级别不正确。链接都疯了。我根本想不通。

结合了水平和垂直布局的树

0 个答案: