mirror of
https://github.com/jlengrand/d3-progress-meter.git
synced 2026-03-10 15:49:02 +00:00
226 lines
5.3 KiB
HTML
226 lines
5.3 KiB
HTML
<!doctype html>
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<link rel="import" href="../polymer/polymer.html">
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<script src="../d3/d3.min.js"></script>
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<!--
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An animated chart that shows the progress as a meter
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### Example
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```html
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<d3-progress-meter radius="100" percentage="0.35" current-text="70" goal-text="Goal: 200" type-text="transactions"></d3-progress-meter>
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```
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@demo demo/index.html
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-->
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<dom-module id="d3-progress-meter">
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<template>
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<style>
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:host {
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display: inline-block;
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}
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#current,#goal,#type,#caption {
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font-family: Arial, sans-serif;
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}
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#current {
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font-weight: bold;
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}
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#type {
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margin-top: 5px;
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text-align: center;
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text-transform: uppercase;
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white-space: nowrap;
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overflow-x: hidden;
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text-overflow: ellipsis;
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}
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#caption {
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/*var(--secondary-text-color)*/
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color: #737373;
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text-align: center;
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}
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</style>
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<svg width$=[[_diameter]] height$=[[_diameter]]>
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<g transform$=[[_transform]]>
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<g>
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<path id="background"></path>
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<path id="progress" class$=[[_progressLevel]]></path>
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<text id="current" dy="-.2em" text-anchor="middle">[[currentText]]</text>
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<text id="goal" dy="1.5em" text-anchor="middle">[[goalText]]</text>
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</g>
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</g>
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</svg>
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<div id="type">[[typeText]]</div>
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<div hidden=[[!caption]] id="caption">[[caption]]</div>
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</template>
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</dom-module>
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<script>
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(function() {
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Polymer({
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is: 'd3-progress-meter',
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properties: {
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/**
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* Radius of the meter. The element will have twice the size of the radius
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*/
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radius: {
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type: Number,
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value: 100,
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observer: '_radiusChanged'
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},
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/**
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* Progress in percent
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*/
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percentage: {
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type: Number,
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observer: '_percentageChanged'
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},
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/**
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* Large number showing current progress
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*/
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currentText: String,
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/**
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* Small text indicating when progress will be 100%
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*/
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goalText: String,
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/**
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* Bottom text describing for what progress is measured
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*/
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typeText: String,
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/**
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* Optional secondary text displayed under the type text
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*/
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caption: String,
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/**
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* Color of the background circle
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*/
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backgroundColor: String,
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/**
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* Array of three colors that specify, in order: low progress, medium progress, high progress
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*/
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progressColors: [],
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/**
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* Amount of progress made (absolute number)
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*/
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_progress: {
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type: Number,
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value: 0
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},
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_diameter: {
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type: Number,
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computed: '_computeDiameter(radius)'
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},
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_transform: {
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type: String,
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computed: '_computeTransform(radius)'
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},
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_progressLevel: {
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type: Number,
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computed: '_computeProgressLevel(percentage)'
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}
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},
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attached: function() {
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this._setColors();
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},
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/**
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* Set the colors of the elements to the ones specified by the user, use defaults if nothing was specified
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*/
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_setColors() {
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// default to var(--paper-grey-300)
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this.$.background.style.fill = this.backgroundColor? this.backgroundColor : '#e0e0e0';
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if (!this.progressColors || this.progressColors.length !== 3) {
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// default to var(--paper-red-500), var(--paper-yellow-500) and var(--paper-green-500)
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this.progressColors = ['#f44336', '#ffeb3b', '#4caf50'];
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}
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var lowProgress = Polymer.dom(this.root).querySelector('.low');
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if (lowProgress) {
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lowProgress.style.fill = this.progressColors[0];
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}
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var mediumProgress = Polymer.dom(this.root).querySelector('.medium');
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if (mediumProgress) {
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mediumProgress.style.fill = this.progressColors[1];
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}
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var highProgress = Polymer.dom(this.root).querySelector('.high');
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if (highProgress) {
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highProgress.style.fill = this.progressColors[2];
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}
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},
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_computeDiameter: function(radius) {
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return 2 * radius;
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},
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_computeTransform: function(radius) {
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return "translate(" + radius + ", " + radius + ")";
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},
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_computeProgressLevel: function(percentage) {
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if (percentage <= .33) {
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return 'low';
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}
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if (percentage <= .66) {
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return 'medium';
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}
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return 'high';
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},
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_radiusChanged: function(oldVal, newVal) {
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this._onRadiusChanged();
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this._onPercentageChanged();
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},
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_percentageChanged: function(oldVal, newVal) {
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this._onPercentageChanged();
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},
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_onRadiusChanged: function() {
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this.progressArc = d3.svg.arc()
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.startAngle(0)
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.innerRadius(9/10 * this.radius)
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.outerRadius(this.radius);
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this.backgroundArc = d3.svg.arc()
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.startAngle(0)
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.innerRadius(0.825 * this.radius)
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.outerRadius(0.85 * this.radius);
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this.$.current.style.fontSize = this.radius/2 + 'px';
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this.$.goal.style.fontSize = this.radius/5 + 'px';
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this.$.type.style.fontSize = this.radius/4 + 'px';
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this.$.type.style.width = 2 * this.radius + 'px';
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this.$.caption.style.fontSize = this.radius/5 + 'px';
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this.$.caption.style.width = 2 * this.radius + 'px';
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this.$.background.setAttribute('d', this.backgroundArc.endAngle(2 * Math.PI)());
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},
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_onPercentageChanged: function() {
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if (typeof this.percentage == 'undefined') {
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return;
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}
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this.percentage = Math.min(1, Math.max(0, this.percentage));
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var i = d3.interpolate(this._progress, this.percentage);
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d3.select(this).transition().tween(this.$.progress, function() {
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return function(t) {
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this._progress = i(t);
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this.$.progress.setAttribute('d', this.progressArc.endAngle(2 * Math.PI * this._progress)());
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}.bind(this);
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}.bind(this));
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}
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});
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})();
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</script>
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