点击D3树节点

时间:2014-07-11 14:36:06

标签: javascript d3.js

我目前有一个带有节点的D3树布局,可以在运行时添加节点,并在每个节点后附加文本。除node.on(..)node.on("mousedown" ....)函数外,几乎所有工作都正常。问题是节点本身不响应点击,附加的文本也是如此。 I.E.单击附加文本时会触发node.on("mousedown",...),而不是实际节点。任何指导将不胜感激!核心函数的代码如下所示,它只接受JSON样式的对象和父ID,然后将该JSON数据作为给定父项的子项插入树中:

function update(record_to_add, parent) {
    if (nodes.length >= 500) return clearInterval(timer);

    // Add a new node to a random parent.
    var n = {id: nodes.length, Username: record_to_add.Username},
            p = nodes[parent];
    if (p.children) p.children.push(n); else p.children = [n];
    nodes.push(n);

    // Recompute the layout and data join.
    node = node.data(tree.nodes(root), function(d) { return d.id; });
    link = link.data(tree.links(nodes), function(d) { return d.source.id + "-" + d.target.id; });

    // Add entering nodes in the parent’s old position.
    node.enter().append("circle", "g")
            .attr("class", "node")
            .attr("r", 10)
            .attr("cx", function(d) { return d.parent.px; })
            .attr("cy", function(d) { return d.parent.py; });

    // Add entering links in the parent’s old position.
    link.enter().insert("path", ".node")
            .attr("class", "link")
            .attr("d", function(d) {
                var o = {x: d.source.px, y: d.source.py};
                return diagonal({source: o, target: o});
            });
    node.enter().insert("text")
            .attr("x", function(d) { return (d.parent.px);})
            .attr("y", function(d) { return (d.parent.py);})
            .text(function(d) { return d.Username; });

    node.on("mousedown", function (d) {
        var g = d3.select(this); // The node
        // The class is used to remove the additional text later
        console.log("FOO");
    });

    node.on("mouseover", function (d) {
        var g = d3.select(this); // The node
        // The class is used to remove the additional text later
        var info = g.append('text')
                .classed('info', true)
                .attr('x', 20)
                .attr('y', 10)
                .text('More info');
    });

    // Transition nodes and links to their new positions.
    var t = svg.transition()
            .duration(duration);

    t.selectAll(".link")
            .attr("d", diagonal);

    t.selectAll(".node")
            .attr("cx", function(d) { return d.px = d.x; })
            .attr("cy", function(d) { return d.py = d.y; });

    t.selectAll("text")
            .style("fill-opacity", 1)
            .attr("x", function(d) { return d.px = d.x; })
            .attr("y", function(d) { return d.py = d.y; });
}

1 个答案:

答案 0 :(得分:2)

为避免文本元素妨碍事件捕获,您可以尝试配置文本元素以忽略指针事件:

svg text {
    pointer-events: none;
}

您也可以直接使用d3:

textSelection
    .attr('pointer-events', 'none');
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