Develop Reference

How to implement hyperlinks in JSON & D3 plugin?

My goal here is to have the childless nodes contain hyperlinks. This is the D3 plugin I'm basing things off of: https://github.com/deltoss/d3-mitch-tree
Image Example
I'm newer to JS and JSON so I'm having difficulties on figuring out how to proceed, especially since there's little to refer to in regard to hyperlinks & JSON. If there's a better way to go about this, I'm certainly open to new ideas.
Thank you in advance
<script src="https://cdn.jsdelivr.net/gh/deltoss/d3-mitch-tree#1.0.2/dist/js/d3-mitch-tree.min.js"></script>
<script>
var data = {
"id": 1,
"name": "Animals",
"type": "Root",
"description": "A living that feeds on organic matter",
"children": [
{
"id": 6,
"name": "Herbivores",
"type": "Type",
"description": "Diet consists solely of plant matter",
"children": [
{
"id": 7,
"name": "Angus Cattle",
"type": "Organism",
"description": "Scottish breed of black cattle",
"children": []
},
{
"id": 8,
"name": "Barb Horse",
"type": "Organism",
"description": "A breed of Northern African horses with high stamina and hardiness. Their generally hot temperament makes it harder to tame.",
"children": []
}
]
}
]
};
var treePlugin = new d3.mitchTree.boxedTree()
.setData(data)
.setElement(document.getElementById("visualisation"))
.setMinScale(0.5)
.setAllowZoom(false)
.setIdAccessor(function(data) {
return data.id;
})
.setChildrenAccessor(function(data) {
return data.children;
})
.setBodyDisplayTextAccessor(function(data) {
return data.description;
})
.setTitleDisplayTextAccessor(function(data) {
return data.name;
})
.initialize();
</script>

Chain this method before .initialize():
.on("nodeClick", function(event, index, arr) {
if (!event.data.children.length) {
console.log('you clicked a child-less item', event.data);
}
})
Inside the condition, event.data is the clicked childless item. Feel free to place URLs inside those objects and use those URLs to navigate away.
Taken from the repo's /examples folder, where I found one named Advanced example with Node Click Event.
According to the comment on the same page, you can also achieve this using the options syntax:
/* const tree = [
place your data here...
]; // */
new d3.mitchTree.boxedTree({
events: {
nodeClick({ data }) {
if (!data.children.length) {
console.log('You clicked a childless item', data);
}
}
}
})
.setData(tree)
// ...rest of chain
.initialize();

Get SAPUI5 VizFrame's id in dataPointStyle rule callback

I am generating some dynamic vizframe column charts by looping at the response I get from my Odata service. One of my requirement for the chart is to show columns in different color depending on the value of a field I have in data. Let's call it validation status.
I have a fairly good idea on how to achieve this in normal situations by using the setVizProperties method and setting up rules for the dataPointStyle properties. It would still have been possible if I had the same criteria for all the charts and all the values. But that isn't the case since I need to check each record individually to determine it's status. So I thought of using the callback functionality of the dataPointStyle. But the problem here is that although it gives me the context but it doesn't tell me from which chart this callback has been triggered. My idea is that if I get the chart name or it's reference then I can access it's model and determine the color.
So if I can somehow get a reference of the vizframe from where the call back is being triggered, it will solve my problem.
callback
Description:
function (data, extData) {...} => true|false
A function to determine whether a given data matches the rule. Parameters:
data is an object with all bound field ids as keys, and corresponding values as values. It helps to consider it as the object containing everything you see in datapoint mouseover tooltip. If unbound dimensions or measures are set in FlatTableDataset context field, the related key/value pairs will be included in this parameter as well.
extData is an object with all other measure fields that in the same line with current data point. Measure Ids as keys, and corresponding values as values. It helps to compare value between different measures.
Link to the vizFrame documentation
JSFiddle
My Data looks something like this:
[{
"RunLogId": "0000000040",
"RuleId": "00016",
"CreatedOn": "2020-07-21",
"CreatedAt": "09:44:35",
"NAV_SUBSCRIBED_LOGS": {
"results": [
{
"RunLogId": "0000000040",
"Sequence": "00001",
"RuleId": "00016",
"Variation": "-3.94",
"ValidationStatus": "F",
"Dimension": "ABC"
},
{
"RunLogId": "0000000040",
"Sequence": "00002",
"RuleId": "00016",
"Variation": "1.04",
"ValidationStatus": "S",
"Dimension": "DEF"
}
]
}
},
{
"RunLogId": "0000000033",
"RuleId": "00014",
"CreatedOn": "2020-07-15",
"CreatedAt": "11:10:09",
"NAV_SUBSCRIBED_LOGS": {
"results": [
{
"RunLogId": "0000000033",
"Sequence": "00001",
"RuleId": "00014",
"Variation": "-2.36",
"ValidationStatus": "F",
"Dimension": "ABC"
},
{
"RunLogId": "0000000033",
"Sequence": "00002",
"RuleId": "00014",
"Variation": "-5.05",
"ValidationStatus": "F",
"Dimension": "DEF"
}
]
}
}]
My code looks some like this :
for (var i = 0; i < chartsCount; i++) {
var oModel = new JSONModel();
var chartData = aSubscriptions[i].NAV_SUBSCRIBED_LOGS.results;
var aDimensions = [];
var aDimFeeds = [];
aDimensions.push({
name: "Dimension",
value: "{Dimension}"
});
aDimFeeds.push("Dimension");
oModel.setData(chartData);
oModel.refresh();
var oDataset = new FlattenedDataset({
dimensions: aDimensions,
measures: [{
name: "Variation",
value: "{Variation}"
}],
data: {
path: "/"
}
});
var oVizFrame = new VizFrame();
oVizFrame.setVizType("column");
oVizFrame.setHeight("450px");
oVizFrame.setDataset(oDataset);
oVizFrame.setModel(oModel);
var feedValueAxisActual = new sap.viz.ui5.controls.common.feeds.FeedItem({
"uid": "valueAxis",
"type": "Measure",
"values": ["Variation"]
}),
feedCategoryAxis = new sap.viz.ui5.controls.common.feeds.FeedItem({
"uid": "categoryAxis",
"type": "Dimension",
"values": aDimFeeds
});
oVizFrame.addFeed(feedValueAxisActual);
oVizFrame.addFeed(feedCategoryAxis);
oVizFrame.setVizProperties({
plotArea: {
dataPointStyle: {
"rules": [
{
callback: function (oContext, extData) {
that.checkValue(oContext, "S");
},
"properties": {
"color": "sapUiChartPaletteSemanticGoodLight1"
},
"displayName": "Successful"
}
, {
callback: function (oContext, extData) {
that.checkValue(oContext, "F");
},
properties: {
color: "sapUiChartPaletteSemanticBadLight1"
},
"displayName": "Failed"
}
],
others: {
properties: {
color: "sapUiChartPaletteSemanticNeutral"
},
"displayName": "Undefined"
}
}
}
});
//Chart Container
var oChartContainer = new ChartContainer();
var oChartContainerContent = new ChartContainerContent();
oChartContainerContent.setContent(oVizFrame);
oChartContainer.addContent(oChartContainerContent);
}

Not sure if I understand you correctly but I'll give it a shot anyway. If I was wrong let me know.
You create charts in a loop. You want to access the specific chart in a callback.
Why don't you access oVizFrame in your callback?
First I would replace the for loop with a forEach. forEach calls a given function for every element in your array:
aSubscriptions.forEach(function(oSubscription) {
const oModel = new JSONModel();
const chartData = oSubscription.NAV_SUBSCRIBED_LOGS.results;
...
}
In a for loop your variables are reused. In a forEach function a new scope is created for every item. So when you access oVizFrame in your callback it is the same oVizFrame that you declared earlier.
Then you should be able to access oVizFrame in your callback.
oVizFrame.setVizProperties({
plotArea: {
dataPointStyle: {
"rules": [{
callback: function(oContext, extData) {
// >>>>>>>> Do something with oVizFrame <<<<<<<<
that.checkValue(oContext, "S");
},
...
}, {
callback: function(oContext, extData) {
// >>>>>>>> Do something with oVizFrame <<<<<<<<
that.checkValue(oContext, "F");
},
...
}],
...
}
}
});

Angularjs Google Chart - How to wait for data before draw a chart

I'm using the Google Chart Tools Directive Module to draw a line/area chart in my Angularjs application, from rdf data retrieved via sparql queries and available, within the app, in json-like format.
In the main controller I declared my drawing function like this:
$scope.createChart = function () {
var json1 = $scope.entities // here I have my data
var rows = []
// populate array with data:
for (var key in json1) {
if (json1[key]['qb:dataset'] == $scope.dsUri) {
var date = new Date(json1[key]['sdmx-dimension:refTime']);
var deads = json1[key]['dpc:deads'];
var newpos = json1[key]['dpc:newPositive'];
var intcare = json1[key]['dpc:intensiveCare'];
rows.push({ c: [ { v:date }, { v:deads }, { v:newpos }, { v:intcare} ] });
}
}
// sort rows by dates
rows.sort(function (rowA, rowB) {
return rowA.c[0].v.getTime() - rowB.c[0].v.getTime();
});
// define chart object
$scope.myChartObject = {
"type": "LineChart",
"data": {
"cols": [
{
"id": "date",
"label": "Date",
"type": "date"
},
{
"id": "deaths",
"label": "Deaths",
"type": "number"
},
{
"id": "newpos",
"label": "New Positive",
"type": "number"
},
{
"id": "intCare",
"label": "Intensive Care",
"type": "number"
}
]
},
"options": {
"title": "Observations",
"height": 400,
"legend": { position: 'bottom' },
"width": 'auto'
}
}
// add rows to data
$scope.myChartObject.data.rows = rows;
return $scope.myChartObject;
}
}]);
And in my HTML I got my chart div:
<div google-chart chart="createChart()" class="mychartClass"></div>
Now the problem with this solution is that the chart gets blank drawn first and - if query doesn't take much time - filled later.
How to wait for data to be retrieved from queries before drawing the chart?
I've tried setting a timeout but this is not the best way to go.

It is better to have the chart directive follow a scope variable:
̶<̶d̶i̶v̶ ̶g̶o̶o̶g̶l̶e̶-̶c̶h̶a̶r̶t̶ ̶c̶h̶a̶r̶t̶=̶"̶c̶r̶e̶a̶t̶e̶C̶h̶a̶r̶t̶(̶)̶"̶ ̶c̶l̶a̶s̶s̶=̶"̶m̶y̶c̶h̶a̶r̶t̶C̶l̶a̶s̶s̶"̶>̶<̶/̶d̶i̶v̶>̶
<div google-chart chart="myChart" class="mychartClass"></div>
Using a function causes the AngularJS framework to invoke the function every digest cycle. This leads to doing alot of unnecessary computation.
Instead do the computation after the data arrives from the server.
$http.get(url).then(function(response) {
$scope.entities = response.data;
$scope.myChart = $scope.createChart();
});
This way the chart is only computed once when the data arrives from the server.

Regarding tree view, is it possible to have an on click function for the tree view

I'm wondering if it's possible to have a custom on click function on the leaves of the tree view in ECharts?
I've look at the docs, but couldn't find any thing on it.
As seen in the image, node where the arrow is pointing, is where i will like to have an on click function
sample tree img

Please specify what exactly do you mean by leaves? Technically any node except first is a leaf.
If you need to handle click on specific node then before process event you need strictly check for equivalence target node by name.
// Params object that will passed to our event listener looks like
{
// ...
componentIndex: 0,
componentSubType: "tree",
componentType: "series",
data: {
name: "MergeEdge", // <-------- our target clicked node
value: 743
},
// ...
}
// Handle click event
myChart.on('click', function(params){
var data = params.data
if(data.name === 'MergeEdge'){ // <-------- node name test
// test passed
// doing something useful
}
});
If you need to handle click on specific node group then you should neatly named nodes. Suppose a chart has three (without root) levels and you only need to handle clicks from the second level.
Let's prepare the data so that nodes of the same level named are similar way:
data: [{
"name": "root",
"children": [{
"name": "node_first_level_01",
"children": [{
"name": "node_second_level_01", // <-------- this
"children": [{
"name": "node_third_level_01",
"value": 3938
}]
},
{
"name": "node_second_level_02", // <-------- this
"children": [{
"name": "node_third_level_02",
"value": 3938,
}]
},
{
"name": "node_second_level_03", // <-------- this
"children": [{
"name": "node_third_level_03",
"value": 3938,
}]
}
]
}]
}],
Now take the function from the first example and instead of a strict check, we will check for compliance with the regular expression:
// Handle click event
myChart.on('click', function(params){
var data = params.data
var rule = /\w+second\w+/gm; // <-------- regex rule
if(rule.test(data.name)){ // <-------- test name
// test passed
// doing something useful
}
});

How to create Tree with checkboxes using JSON data with Parent Child Relation?

I have JSON data and that JSON data has parent child relation . I Want to create tree structure from it. i found many plugins and libraries but i can't found my requirement . I am getting this JSON data using PHP script.
Here is image that has tree structure that i want to create . i'm stuck at it.I know JSON is not as displayed in image but i only want to show you what a tree should look like .How to create tree like in image.All i want is javascript code to handle and create this type of structure of tree . Working example is must & much appreciated.
You can use JSON format as you like and tree should be collapsible.Also provide required JSON format for it.
and my JSON data as follows :
{
"2":
{
"5": "Wrist Watch"
},
"5":
{
"9": "Men's"
},
"18":
{
"3": "Clothing"
},
"28":
{
"1": "Perfumes"
},
"29":
{
"7": "Laptop",
"10": "Tablets"
},
"30":
{
"8": "Mobile"
},
"31":
{
"2": "Books"
},
"33":
{
"6": "Electronics"
},
"34":
{
"4": "Home & Kitchen\n"
}
}

If you want to roll your own, the keyword in "trees" is recursion. It needs to support any depth of data and the code and data should both support recursion.
This means your JSON data should be a recursive structure, where each node looks the same (and looks something like this):
{
id: 1, // data id
title: "title", // display title
children: [ // list of children, each with this same structure
// list of child nodes
]
}
Note: I have changed the sample data to contain more depth as 2 levels never shows up recursion problems.
e.g.:
{
id: 0,
title: "root - not displayed",
children: [{
id: 1,
title: "Option 1",
children: [{
id: 11,
title: "Option 11",
children: [{
id: 111,
title: "Option 111"
}, {
id: 112,
title: "Option 112"
}]
}, {
id: 12,
title: "Option 12"
}]
}, {
id: 2,
title: "Option 2",
children: [{
id: 21,
title: "Option 21"
}, {
id: 22,
title: "Option 22"
}]
}, {
id: 3,
title: "Option 3",
children: [{
id: 31,
title: "Option 31"
}, {
id: 32,
title: "Option 32"
}]
}]
}
The recursive function looks like this:
function addItem(parentUL, branch) {
for (var key in branch.children) {
var item = branch.children[key];
$item = $('<li>', {
id: "item" + item.id
});
$item.append($('<input>', {
type: "checkbox",
name: "item" + item.id
}));
$item.append($('<label>', {
for: "item" + item.id,
text: item.title
}));
parentUL.append($item);
if (item.children) {
var $ul = $('<ul>').appendTo($item);
addItem($ul, item);
}
}
}
JSFiddle: http://jsfiddle.net/0s0p3716/188/
The code recurses the structure, adding new ULs and LIs (with checkbox etc ) as it goes. The top level call just provides the initial root starting points of both the display and the data.
addItem($('#root'), data);
The end result looks like this:
If you want to toggle visibility, based on the checked state, use this:
$(':checkbox').change(function () {
$(this).closest('li').children('ul').slideToggle();
});
If you also want the labels to toggle the checkboxes, use this:
$('label').click(function(){
$(this).closest('li').find(':checkbox').trigger('click');
});
Note: I have only provided the most basic of styling as that will typically be "to taste". Examples in links were shown in another answer.
-- updated:
amended: possible wrong ids for items 31 & 32?
function for better selection and deselection(for parents cascading into child nodes):
$(function () {
addItem($('#root'), data);
$(':checkbox').click(function () {
$(this).find(':checkbox').trigger('click');
var matchingId = $(this).attr('id');
if ($(this).attr('checked'))
{
$('input[id*=' + matchingId +']').each(function() {
$(this).removeAttr('checked');
$(this).prop('checked', $(this).attr('checked'));
});
}
else {
$('input[id*=' + matchingId +']').each(function() {
$(this).attr('checked', 'checked');
$(this).prop('checked', $(this).attr('checked'));
});
}
});
$('label').click(function(){
$(this).closest('li').children('ul').slideToggle();
});
-- Update the fiddle with this as shown here(JsFiddle) and it will work better and also will allow you to click the text to expand without selecting at the same time - I know I find this far more useful. It will help (and this is personal preference) you to see what values and options are available without having to select the first.

The thing with programming is: existing libraries and tools rarely do exactly what you need. It's always up to you to convert the input data into exactly the format they expect and then the output data into the format you need. Occasionally this conversion requires more effort than writing your own code instead of a library function - this seems to be one of those occasions.
As #philosophocat already noted, the best way to present such a tree in HTML markup would be nested lists. All you need is iterate through the JSON data recursively and create the corresponding elements:
function createList(data)
{
var result = document.createElement("ul");
for (var key in data)
{
if (!data.hasOwnProperty(key) || key == "_title")
continue;
var value = data[key];
var item = createItem(key, typeof value == "string" ? value : value._title);
if (typeof value == "object")
item.appendChild(createList(value));
result.appendChild(item);
}
return result;
}
function createItem(value, title)
{
var result = document.createElement("li");
var checkbox = document.createElement("input");
checkbox.setAttribute("type", "checkbox");
checkbox.setAttribute("name", "selection");
checkbox.setAttribute("value", value);
result.appendChild(checkbox);
result.appendChild(document.createTextNode(title));
return result;
}
document.body.appendChild(createList(jsonData));
Note that the order in which the items appear is "random" here, as object keys are generally unordered. You can change the code above to sort the keys somehow, or you can change the data to use arrays and define an order. I also added a "_title" property to the data to make sure the categories are labeled - your data doesn't have any labels at all for the categories.
Now you need to style the lists in such a way that they look like a tree. The obvious solution is using the list-style-image CSS property to replace the usual bullet points by a grid lines image. However, that doesn't work for nested lists - there you need to show multiple images, vertical lines from the higher-level lists as well as the image actually belonging to the current list item.
This can be solved by using background images for the list items instead, these background images will be shown next to sublists as well then. Here are the example styles I've got:
ul
{
padding: 0;
list-style-type: none;
font-size: 14px;
}
li
{
background-image: url(data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAA0AAABkCAYAAABdELruAAAAP0lEQVR42u3PQQoAIAgEQP3/o6t7JAhdolkQD4sMZuwZazKKlGXniHRDOu6HfyKRSCQSiUQikUgkEolEIv0rTc/fNmQ78+lPAAAAAElFTkSuQmCC);
background-repeat: no-repeat;
padding-left: 13px;
}
li:last-child
{
background-image: url(data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAA0AAAAJCAYAAADpeqZqAAAAHUlEQVR42mNkwAT/gZiRAQ/AK0mKplGbqGETThoACFgJCVdBEqAAAAAASUVORK5CYII=);
}
li > ul
{
margin-left: 5px;
}
Note that this will still get ugly if the sublist is too high - the height of the background image I used is merely 100px. This can be solved by using a larger background image of course. A cleaner alternative would be using border-image-slice CSS property but that one is currently only supported in Firefox.
Fiddle for this code
Edit: This article goes into more detail on styling nested lists like a tree. While the approach is similar, it manages to avoid the image size issues I mentioned above by using a separate image for the vertical line which can be repeated vertically. On the downside, that approach looks like it might only work with solid lines and produce artifacts if applied to dotted lines.

Use http://www.jstree.com/. This library provides each function I ever need when working with trees and javascript.
You simple have to change your json-response according to the given format (http://www.jstree.com/docs/json/):
{
id : "string" // will be autogenerated if omitted
text : "string" // node text
icon : "string" // string for custom
state : {
opened : boolean // is the node open
disabled : boolean // is the node disabled
selected : boolean // is the node selected
},
children : [] // array of strings or objects
li_attr : {} // attributes for the generated LI node
a_attr : {} // attributes for the generated A node
}
Set up the javascript and include all required files and there you go.
I just skip repeating the documentation by referring to it: http://www.jstree.com/

I'm using DynaTree for an internal site at work and it works fantastic.
Download DynaTree
Format your JSON as such (taking your screenshot as an example):
{
"title": "Sports & Outdoors",
"isFolder": true,
"key": "0",
"children": [
{
"title": "Fitness Accessories",
"key": "1",
"isFolder": true,
"children": [
{
"title": "Fitness Accessories",
"key": "2",
"isFolder": true,
"children": [
{
"title": "Pedometer & Watches",
"key": "3"
}
]
}
]
}
]
}
Run this JS on page load:
$("#buildTree").dynatree({
onActivate: function (node) {
// A DynaTreeNode object is passed to the activation handler
// Note: we also get this event, if persistence is on, and the page is reloaded.
leftActiveNodeKey = node.data.key;
},
persist: false,
checkbox: true,
selectMode: 3,
children: $.parseJSON(response.d)
});
To get the selected nodes you can use:
var selectedNodes = $("#buildTree").dynatree("getTree").getSelectedNodes();
Dynatree is pretty customization, both in look and function. Read through the documentation for the settings you need.

Check these sites.Hope this helps.
http://www.jstree.com/docs/json/
http://www.jeasyui.com/documentation/tree.php
http://jqwidgets.com/jquery-widgets-demo/demos/jqxtree/index.htm#demos/jqxtree/checkboxes.htm

#Gone Coding's example is excellent, but the child check boxes will not show as 'uncheked' even though the checked attribute is removed, as rendered in Chrome.
If you add,
$(this).prop('checked', false);
to the code, so it reads as
$(function () {
addItem($('#root'), data);
$(':checkbox').click(function () {
var matchingId = $(this).attr('id');
if ($(this).attr('checked'))
{
$('input[id*=' + matchingId +']').each(function() {
$(this).removeAttr('checked');
$(this).prop('checked', false);
$(this).prop('checked', $(this).attr('checked'));
return;
});
}
else {
$('input[id*=' + matchingId +']').each(function() {
$(this).attr('checked', 'checked');
$(this).prop('checked', $(this).attr('checked'));
});
}
});
$('label').click(function(){
$(this).closest('li').children('ul').slideToggle();
});
});
the child check boxes will fill or clear when the user makes a change.