本文介绍了D3.js树-使用搜索进行分页的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我有一个previous question，它有一个分页子节点的解决方案。
此操作运行良好，但已导致用于查找d.type == 'learning_event'的节点的Select2列表出现问题。
Select2显示节点，但树中分页的节点不显示在Select2中。
相反，显示分页节点的名称‘...’，而不是分页节点的名称。
参见fiddle
小提琴中的代码：
//===============================================
function learningEventCollection(d) {
if (d.children)
d.children.forEach(learningEventCollection);
else if (d._children)
d._children.forEach(learningEventCollection);
if (!d.children && d.type == 'learning_event') learningEventData.push(d.name);
}
//===============================================
function searchTree(d) {
if (d.children)
d.children.forEach(searchTree);
else if (d._children)
d._children.forEach(searchTree);
var searchFieldValue = eval(searchField);
if (searchFieldValue && searchFieldValue.toLowerCase().match(searchText.toLowerCase())) {
// Walk parent chain
var ancestors = [];
var parent = d;
while (typeof(parent) !== "undefined") {
ancestors.push(parent);
//console.log(parent);
parent.class = "found";
parent = parent.parent;
}
//console.log(ancestors);
}
}
//===============================================
function clearAll(d) {
d.class = "";
if (d.children)
d.children.forEach(clearAll);
else if (d._children)
d._children.forEach(clearAll);
}
//===============================================
function collapse(d) {
if (d.children) {
d._children = d.children;
//set the parent object in all the children
d._children.forEach(function(d1) {
d1.parent = d;
collapse(d1);
});
d.children = null;
}
}
//===============================================
function collapseAllNotFound(d) {
if (d.children) {
if (d.class !== "found") {
d._children = d.children;
d._children.forEach(collapseAllNotFound);
d.children = null;
} else
d.children.forEach(collapseAllNotFound);
}
}
//===============================================
function expandAll(d) {
if (d._children) {
d.children = d._children;
d.children.forEach(expandAll);
d._children = null;
} else if (d.children)
d.children.forEach(expandAll);
}
//===============================================
// Toggle children on click.
function toggle(d) {
if (d.children) {
d._children = d.children;
d.children = null;
} else {
d.children = d._children;
d._children = null;
}
clearAll(root);
update(d);
$("#search").select2("val", "");
}
//===============================================
$("#search").on("select2-selecting", function(e) {
clearAll(root);
expandAll(root);
update(root);
searchField = "d.name";
searchText = e.object.text;
searchTree(root);
root.children.forEach(collapseAllNotFound);
update(root);
})
var colourScale = d3.scale.ordinal()
.domain(["Program", "ProgramGroup1", "ProgramGroup2"])
.range(["#abacab", "#b67a4e", "#5a6fbb"])
var margin = {
top: 20,
right: 120,
bottom: 20,
left: 120
},
width = 2000 - margin.right - margin.left,
height = 500 - 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.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 = treeData;
root.x0 = height / 2;
root.y0 = 0;
function pageNodes(d, options) {
if (d.children) {
d.children.forEach(c => pageNodes(c, options));
if (options.page && options.page(d) && d.children.length > options.maxNode) {
d.pages = {}
const count = options.maxNode - 2;
const l = Math.ceil(d.children.length / count);
for (let i = 0; i < l; i++) {
const startRange = i * count;
const endRange = i * count + count;
let pageNumber = i == 0 ? l - 1 : i - 1;
d.pages[i] = d.children.slice(startRange, endRange);
d.pages[i].unshift({
...d.pages[i][0],
data: {
name: options.getLabel ? options.getLabel(pageNumber) : "..."
},
pageNumber,
name: "..."
})
// console.log(i, d.pages[i]);
pageNumber = i != (l - 1) ? i + 1 : 0;
d.pages[i].push({
...d.pages[i][0],
data: {
name: options.getLabel ? options.getLabel(pageNumber) : "..."
},
pageNumber,
name: "..."
});
}
d.children = d.pages[0];
console.log(d.pages)
}
}
}
root.children.forEach(c => pageNodes(c, {
maxNode: 8,
page: function(d) {
return d.type == "unit_group";
}
}));
learningEventData = [];
learningEventCollection(root);
learningEventDataObject = [];
learningEventData.sort(function(a, b) {
if (a > b) return 1; // sort
if (a < b) return -1;
return 0;
})
.filter(function(item, i, ar) {
return ar.indexOf(item) === i;
}) // remove duplicate items
.filter(function(item, i, ar) {
learningEventDataObject.push({
"id": i,
"text": item
});
});
$("#search").select2({
placeholder: "Select a Learning Event...",
data: learningEventDataObject,
containerCssClass: "search"
});
function collapse(d) {
if (d.children) {
d._children = d.children;
d._children.forEach(collapse);
d.children = null;
}
}
root.children.forEach(collapse);
update(root);
//svg.style("height", "500px");
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) {
d.y = d.depth * 180;
});
// 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)
.attr('stroke', function(d) {
return d.color ? d.color : 'blue';
})
.style("fill", function(d) {
return d._children ? "#ccc" : "#fff";
});
nodeEnter.append("text")
.attr("x", function(d) {
return d.children || d._children ? -13 : 13;
})
.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 "translate(" + d.y + "," + d.x + ")";
});
nodeUpdate.select("circle")
.attr("r", 6.5)
.attr("fill-opacity", "0.7")
.attr("stroke-opacity", "1")
.style("fill", function(d) {
if (d.class !== "found") {
if(d.type == "learning_event") return "#6eb7e3";
if(d.type == "assessment") return "#4ecc44";
}
if (d.class === "found") {
return "#ff4136"; //red
} else {
return (typeof d._children !== 'undefined') ? (colourScale(findParent(d))) : '#FFF';
}
})
.style("stroke", function(d) {
if (d.class !== "found") {
if(d.type == "learning_event") return "#6eb7e3";
if(d.type == "assessment") return "#4ecc44";
if(d.name.match(/Learning Events/)) return "#6eb7e3";
if(d.name.match(/Assessments/)) return "#4ecc44";
}
if (d.class === "found") {
return "#ff4136"; //red
} else {
return colourScale(findParent(d));
}
});
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;
});
}
function findParent(datum) {
if (datum.depth < 2) {
return datum.name
} else {
return findParent(datum.parent)
}
}
function findParentLinks(datum) {
if (datum.target.depth < 2) {
return datum.target.name
} else {
return findParent(datum.target.parent)
}
}
// Toggle children on click.
function click(d) {
if (d.hasOwnProperty('pageNumber')) {
d.parent.children = d.parent.pages[d.pageNumber];
} else if (d.children) {
d._children = d.children;
d.children = null;
} else {
d.children = d._children;
d._children = null;
}
update(d);
}
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var treeData = {"name":"Program","column_to_sort_by":null,"type":"program","children":[{"name":"ProgramGroup1","column_to_sort_by":null,"type":"program_group","children":[{"name":"POGroup1","column_to_sort_by":null,"type":"1program_outcome_group","children":[{"name":"PO1","column_to_sort_by":null,"type":"program_outcome","children":[{"name":"Unit1","column_to_sort_by":"Unit1","children":[{"name":"UG1-LE","column_to_sort_by":null,"type":"unit_group","children":[{"name":"LE1","column_to_sort_by":"LE1","type":"learning_event"},{"name":"LE10","column_to_sort_by":"LE10","type":"learning_event"},{"name":"LE11","column_to_sort_by":"LE11","type":"learning_event"},{"name":"LE12","column_to_sort_by":"LE12","type":"learning_event"},{"name":"LE13","column_to_sort_by":"LE13","type":"learning_event"},{"name":"LE14","column_to_sort_by":"LE14","type":"learning_event"},{"name":"LE15","column_to_sort_by":"LE15","type":"learning_event"},{"name":"LE2","column_to_sort_by":"LE2","type":"learning_event"},{"name":"LE4","column_to_sort_by":"LE4","type":"learning_event"},{"name":"LE5","column_to_sort_by":"LE5","type":"learning_event"},{"name":"LE6","column_to_sort_by":"LE6","type":"learning_event"},{"name":"LE7","column_to_sort_by":"LE7","type":"learning_event"},{"name":"LE8","column_to_sort_by":"LE8","type":"learning_event"},{"name":"LE9","column_to_sort_by":"LE9","type":"learning_event"}]},{"name":"UG1-Assessments","column_to_sort_by":null,"type":"unit_group","children":[{"name":"ASST1","column_to_sort_by":"ASST1","type":"assessment"},{"name":"ASST10","column_to_sort_by":"ASST10","type":"assessment"},{"name":"ASST11","column_to_sort_by":"ASST11","type":"assessment"},{"name":"ASST13","column_to_sort_by":"ASST13","type":"assessment"},{"name":"ASST14","column_to_sort_by":"ASST14","type":"assessment"},{"name":"ASST15","column_to_sort_by":"ASST15","type":"assessment"},{"name":"ASST2","column_to_sort_by":"ASST2","type":"assessment"},{"name":"ASST3","column_to_sort_by":"ASST3","type":"assessment"},{"name":"ASST4","column_to_sort_by":"ASST4","type":"assessment"},{"name":"ASST5","column_to_sort_by":"ASST5","type":"assessment"},{"name":"ASST6","column_to_sort_by":"ASST6","type":"assessment"},{"name":"ASST7","column_to_sort_by":"ASST7","type":"assessment"},{"name":"ASST8","column_to_sort_by":"ASST8","type":"assessment"},{"name":"ASST9","column_to_sort_by":"ASST9","type":"assessment"}]}],"type":"unit"}]},{"name":"PO2","column_to_sort_by":null,"type":"program_outcome"},{"name":"PO3","column_to_sort_by":null,"type":"program_outcome"},{"name":"PO4","column_to_sort_by":null,"type":"program_outcome"},{"name":"PO5","column_to_sort_by":null,"type":"program_outcome"},{"name":"PO6","column_to_sort_by":null,"type":"program_outcome"},{"name":"PO7","column_to_sort_by":null,"type":"program_outcome"},{"name":"PO8","column_to_sort_by":null,"type":"program_outcome"},{"name":"PO9","column_to_sort_by":null,"type":"program_outcome"},{"name":"PO10","column_to_sort_by":null,"type":"program_outcome"},{"name":"PO11","column_to_sort_by":null,"type":"program_outcome"}]},{"name":"POGroup2","column_to_sort_by":null,"type":"1program_outcome_group"}]},{"name":"ProgramGroup2","column_to_sort_by":null,"type":"program_group"}]};
//===============================================
function searchTree(d) {
if (d.pages) {
const pageKeys = Object.keys(d.pages)
Object.keys(d.pages).forEach(page => {
let currentNodes = d.pages[page];
currentNodes.forEach((node, idx) => {
if (node.name.toLowerCase() == searchText.toLowerCase()) {
currentNodes[idx]['parent'] = d.children[0].parent;
d.children = currentNodes;
}
})
});
}
if (d.children)
d.children.forEach(searchTree);
else if (d._children)
d._children.forEach(searchTree);
var searchFieldValue = eval(searchField);
if (searchFieldValue && searchFieldValue.toLowerCase().match(searchText.toLowerCase())) {
// Walk parent chain
var ancestors = [];
var parent = d;
while (typeof(parent) !== "undefined") {
ancestors.push(parent);
//console.https://jsfiddle.net/qyn5fd0t/#runlog(parent);
parent.class = "found";
parent = parent.parent;
}
// console.log(ancestors);
}
}
//===============================================
function clearAll(d) {
d.class = "";
if (d.children)
d.children.forEach(clearAll);
else if (d._children)
d._children.forEach(clearAll);
}
//===============================================
function collapse(d) {
if (d.children) {
d._children = d.children;
//set the parent object in all the children
d._children.forEach(function(d1) {
d1.parent = d;
collapse(d1);
});
d.children = null;
}
}
//===============================================
function collapseAllNotFound(d) {
if (d.children) {
if (d.class !== "found") {
d._children = d.children;
d._children.forEach(collapseAllNotFound);
d.children = null;
} else
d.children.forEach(collapseAllNotFound);
}
}
//===============================================
function expandAll(d) {
if (d._children) {
d.children = d._children;
d.children.forEach(expandAll);
d._children = null;
} else if (d.children)
d.children.forEach(expandAll);
}
//===============================================
// Toggle children on click.
function toggle(d) {
if (d.children) {
d._children = d.children;
d.children = null;
} else {
d.children = d._children;
d._children = null;
}
clearAll(root);
update(d);
$("#search").select2("val", "");
}
//===============================================
$("#search").on("select2-selecting", function(e) {
clearAll(root);
expandAll(root);
update(root);
searchField = "d.name";
searchText = e.object.text;
searchTree(root);
root.children.forEach(collapseAllNotFound);
update(root);
})
var colourScale = d3.scale.ordinal()
.domain(["Program", "ProgramGroup1", "ProgramGroup2"])
.range(["#abacab", "#b67a4e", "#5a6fbb"])
var margin = {
top: 20,
right: 120,
bottom: 20,
left: 120
},
width = 2000 - margin.right - margin.left,
height = 500 - 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.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 = treeData;
root.x0 = height / 2;
root.y0 = 0;
function pageNodes(d, options) {
if (d.children) {
d.children.forEach(c => pageNodes(c, options));
if (options.isPageable && options.isPageable(d) && d.children.length > options.maxNode) {
d.pages = {}
const count = options.maxNode - 2;
const l = Math.ceil(d.children.length / count);
for (let i = 0; i < l; i++) {
const startRange = i * count;
const endRange = i * count + count;
let pageNumber = i == 0 ? l - 1 : i - 1;
d.pages[i] = d.children.slice(startRange, endRange);
options.page && options.page(d.pages[i]);
d.pages[i].unshift({
...d.pages[i][0],
data: {
name: options.getLabel ? options.getLabel(pageNumber) : "..."
},
pageNumber,
name: "...",
type: "page-toggle-node"
})
// console.log(i, d.pages[i]);
pageNumber = i != (l - 1) ? i + 1 : 0;
d.pages[i].push({
...d.pages[i][0],
data: {
name: options.getLabel ? options.getLabel(pageNumber) : "..."
},
pageNumber,
name: "...",
type: "page-toggle-node"
});
}
d.children = d.pages[0];
}
}
}
//===============================================
const groupLearningOptions = [];
let groupLearningOptionsCounter = 0;
root.children.forEach(c => pageNodes(c, {
maxNode: 8,
isPageable: function(d) {
return d.type == "unit_group";
},
page: function(nodes) {
if (nodes[0].type == "learning_event") {
groupLearningOptions.push({
text: `Group ${groupLearningOptions.length + 1}`,
children: nodes.map(node => ({
id: groupLearningOptionsCounter++,
text: node.name
}))
.sort((a, b) => (a.text > b.text) ? 1 : -1)
})
}
}
}));
// console.log(groupLearningOptions);
$("#search").select2({
placeholder: "Select a Learning Event...",
data: {
results: groupLearningOptions
},
containerCssClass: "search"
});
function collapse(d) {
if (d.children) {
d._children = d.children;
d._children.forEach(collapse);
d.children = null;
}
}
root.children.forEach(collapse);
update(root);
//svg.style("height", "500px");
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) {
d.y = d.depth * 180;
});
// 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)
.attr('stroke', function(d) {
return d.color ? d.color : 'blue';
})
.style("fill", function(d) {
return d._children ? "#ccc" : "#fff";
});
nodeEnter.append("text")
.attr("x", function(d) {
return d.children || d._children ? -13 : 13;
})
.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 "translate(" + d.y + "," + d.x + ")";
});
nodeUpdate.select("circle")
.attr("r", 6.5)
.attr("fill-opacity", "0.7")
.attr("stroke-opacity", "1")
.style("fill", function(d) {
if (d.class !== "found") {
if (d.type == "learning_event") return "#6eb7e3";
if (d.type == "assessment") return "#4ecc44";
}
if (d.class === "found") {
return "#ff4136"; //red
} else {
return (typeof d._children !== 'undefined') ? (colourScale(findParent(d))) : '#FFF';
}
})
.style("stroke", function(d) {
if (d.class !== "found") {
if (d.type == "learning_event") return "#6eb7e3";
if (d.type == "assessment") return "#4ecc44";
if (d.name.match(/Learning Events/)) return "#6eb7e3";
if (d.name.match(/Assessments/)) return "#4ecc44";
}
if (d.class === "found") {
return "#ff4136"; //red
} else {
return colourScale(findParent(d));
}
});
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;
});
}
function findParent(datum) {
if (datum.depth < 2) {
return datum.name
} else {
return findParent(datum.parent)
}
}
function findParentLinks(datum) {
if (datum.target.depth < 2) {
return datum.target.name
} else {
return findParent(datum.target.parent)
}
}
// Toggle children on click.
function click(d) {
if (d.hasOwnProperty('pageNumber')) {
d.parent.children = d.parent.pages[d.pageNumber];
} else if (d.children) {
d._children = d.children;
d.children = null;
} else {
d.children = d._children;
d._children = null;
}
update(d);
}
在此工作example
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