mirror of
https://github.com/Jermolene/TiddlyWiki5
synced 2024-12-26 10:00:34 +00:00
134 lines
3.5 KiB
JavaScript
134 lines
3.5 KiB
JavaScript
/*\
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title: $:/plugins/tiddlywiki/d3/cloudwidget.js
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type: application/javascript
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module-type: widget
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A widget for displaying word clouds. Derived from https://github.com/jasondavies/d3-cloud
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\*/
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(function(){
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/*jslint node: true, browser: true */
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/*global $tw: false */
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"use strict";
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var Widget = require("$:/core/modules/widgets/widget.js").widget,
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d3 = require("$:/plugins/tiddlywiki/d3/d3.js").d3;
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if($tw.browser) {
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// Frightful hack to give the cloud plugin the global d3 variable it needs
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window.d3 = d3;
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d3.layout.cloud = require("$:/plugins/tiddlywiki/d3/d3.layout.cloud.js").cloud;
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}
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var CloudWidget = function(parseTreeNode,options) {
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this.initialise(parseTreeNode,options);
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};
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/*
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Inherit from the base widget class
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*/
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CloudWidget.prototype = new Widget();
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/*
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Render this widget into the DOM
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*/
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CloudWidget.prototype.render = function(parent,nextSibling) {
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// Save the parent dom node
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this.parentDomNode = parent;
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// Compute our attributes
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this.computeAttributes();
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// Execute our logic
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this.execute();
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// Create the chart
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var chart = this.createChart(parent,nextSibling);
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this.updateChart = chart.updateChart;
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if(this.updateChart) {
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this.updateChart();
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}
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// Insert the chart into the DOM and render any children
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parent.insertBefore(chart.domNode,nextSibling);
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this.domNodes.push(chart.domNode);
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};
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CloudWidget.prototype.createChart = function(parent,nextSibling) {
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var self = this,
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fill = d3.scale.category20(),
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data = this.wiki.getTiddlerData(this.cloudData);
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// Use dummy data if none provided
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if(!data) {
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data = "This word cloud does not have any data in it".split(" ").map(function(d) {
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return {text: d, size: 10 + Math.random() * 90};
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});
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}
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// Create the svg element
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var svgElement = d3.select(parent).insert("svg",function() {return nextSibling;})
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.attr("width", 600)
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.attr("height", 400);
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// Create the main group
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var mainGroup = svgElement
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.append("g")
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.attr("transform", "translate(300,200)");
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// Create the layout
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var layout = d3.layout.cloud().size([600, 400])
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.words(data)
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.padding(5)
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.rotate(function() { return ~~(Math.random() * 5) * 30 - 60; })
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.font("Impact")
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.fontSize(function(d) { return d.size*2; })
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.on("end", draw)
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.start();
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// Function to draw all the words
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function draw(words) {
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mainGroup.selectAll("text")
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.data(words)
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.enter().append("text")
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.style("font-size", function(d) { return d.size + "px"; })
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.style("font-family", "Impact")
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.style("fill", function(d, i) { return fill(i); })
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.attr("text-anchor", "middle")
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.attr("transform", function(d) {
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return "translate(" + [d.x, d.y] + ")rotate(" + d.rotate + ")";
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})
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.text(function(d) { return d.text; });
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}
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function updateChart() {
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layout.spiral(self.spiral);
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}
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return {
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domNode: svgElement[0][0],
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updateChart: updateChart
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};
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};
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/*
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Compute the internal state of the widget
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*/
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CloudWidget.prototype.execute = function() {
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// Get the parameters from the attributes
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this.cloudData = this.getAttribute("data");
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this.cloudSpiral = this.getAttribute("spiral","archimedean");
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};
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/*
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Selectively refreshes the widget if needed. Returns true if the widget or any of its children needed re-rendering
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*/
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CloudWidget.prototype.refresh = function(changedTiddlers) {
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var changedAttributes = this.computeAttributes();
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if(changedAttributes.data || changedTiddlers[this.cloudData]) {
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this.refreshSelf();
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return true;
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} else if(changedAttributes.spiral) {
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this.execute();
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if(this.updateChart) {
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this.updateChart();
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}
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return true;
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}
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return false;
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};
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exports.d3cloud = CloudWidget;
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})();
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