D3 svg & angular

Adam Klein

- 500Tech - Frontend Experts - Passionate developer & speaker - I used to have a jewfro

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D3, SVG & ANGULAR

SVG BASICS

VISUALIZATIONS

Existing Solution?

Pure SVG & Angular

D3

D3 + Angular?

D3 PATH GENERATORS

Make an Arc - SVG

<path stroke="black" fill="black" thickness="2" d="M13.753288904374106,9.992349288972044A17,17 0 0,1 -13.753288904374106,9.992349288972045L-12.135254915624213,8.816778784387099A15,15 0 0,0 12.135254915624213,8.816778784387097Z"></path>

Make an Arc - D3

let arc = d3.svg.arc() .outerRadius(17) .innerRadius(15) .startAngle(0.7 * Math.PI) .endAngle(1.3 * Math.PI); d3.select("svg") .append("path") .attr("d", arc());

D3 Path Data Generators + Angular

arc() { return d3.svg.arc() .outerRadius(17) .innerRadius(15) .startAngle(0.7 * Math.PI) .endAngle(1.3 * Math.PI)(); }

<path d={{ $ctrl.arc() }}></path>

Custom Angular component

<arc stroke="yellow" fill="yellow" thickness="2" radius="17" start-angle="0.7" end-angle=“1.3"> </arc>

ng-attr-*

<path ng-attr-d={{ $ctrl.arc() }}></path>

custom component

{ templateNamespace: 'svg', replace: true }

Single root

<g> <text>Hello</text> <text>World</text> </g>

D3 BEHAVIOURS

drag

var drag = d3.behavior.drag() .on("drag", dragged);

function dragged(d) { d3.select(this)

.attr("cx", d.x = d3.event.x)

.attr("cy", d.y = d3.event.y); }

var dot = d3.select("g") .selectAll("circle") .data(dots) .enter().append("circle") .attr("r", 5) .attr("cx", function(d) { return d.x; }) .attr("cy", function(d) { return d.y; }) .call(drag);

drag

Define behaviour

var drag = d3.behavior.drag() .on("drag", dragged);

function dragged(d) { d3.select(this)

.attr("cx", d.x = d3.event.x)

.attr("cy", d.y = d3.event.y); }

var dot = d3.select("g") .selectAll("circle") .data(dots) .enter().append("circle") .attr("r", 5) .attr("cx", function(d) { return d.x; }) .attr("cy", function(d) { return d.y; }) .call(drag);

drag

var drag = d3.behavior.drag() .on("drag", dragged);

function dragged(d) { d3.select(this)

.attr("cx", d.x = d3.event.x)

.attr("cy", d.y = d3.event.y); }

var dot = d3.select("g") .selectAll("circle") .data(dots) .enter().append("circle") .attr("r", 5) .attr("cx", function(d) { return d.x; }) .attr("cy", function(d) { return d.y; }) .call(drag);

Create elements and bind to data

drag

var drag = d3.behavior.drag() .on("drag", dragged);

function dragged(d) { d3.select(this)

.attr("cx", d.x = d3.event.x)

.attr("cy", d.y = d3.event.y); }

var dot = d3.select("g") .selectAll("circle") .data(dots) .enter().append("circle") .attr("r", 5) .attr("cx", function(d) { return d.x; }) .attr("cy", function(d) { return d.y; }) .call(drag); attach behaviour to

element

drag

Change DOM on drag

var drag = d3.behavior.drag() .on("drag", dragged);

function dragged(d) { d3.select(this)

.attr("cx", d.x = d3.event.x)

.attr("cy", d.y = d3.event.y); }

var dot = d3.select("g") .selectAll("circle") .data(dots) .enter().append("circle") .attr("r", 5) .attr("cx", function(d) { return d.x; }) .attr("cy", function(d) { return d.y; }) .call(drag);

d3 drag + angular

<circle ng-attr-cx="{{ item.x }}" ng-attr-cy="{{ item.y }}"> </circle>

const drag = d3.behavior.drag() .on(‘drag', () => {

this.item.x += d3.event.dx; this.item.y += d3.event.dy; $scope.$digest(); });

d3.select($element[0]).call(drag);

Define behaviour

d3 drag + angular

const drag = d3.behavior.drag() .on(‘drag', () => {

this.item.x += d3.event.dx; this.item.y += d3.event.dy; $scope.$digest(); });

d3.select($element[0]).call(drag);

Change data on drag

wrap with directive

wrap with directive

const drag = d3.behavior.drag() .on(‘drag', () => {

this.item.x += d3.event.dx; this.item.y += d3.event.dy; $scope.$digest(); });

d3.select($element[0]).call(drag); Attach behaviour to element

generic draggable directive

<circle draggable="item" ng-attr-cx="{{ item.x }}" ng-attr-cy="{{ item.y }}"> </circle>

zoom-pan

d3.behavior.zoom()

Performance

const throttleDigest = _.throttle($scope.$digest.bind($scope), 17);

const drag = d3.behavior.drag() .on(‘drag', () => {

this.item.x += d3.event.dx; this.item.y += d3.event.dy; throttleDigest (); });

d3.select($element[0]).call(drag);

PerformanceThrottling

Use one time binding when possible

Change data & attributes directly - no digest

Individual digests using events

Fallback to using pure D3

LAYOUTS

Examples

http://bl.ocks.org/mbostock/4062045http://bl.ocks.org/mbostock/4063530http://bl.ocks.org/mbostock/7607999http://bl.ocks.org/mbostock/4339083

D3 force layout + Angular

const force = d3.layout.force() .charge(-60) .gravity(0.02) .linkStrength(0.1) .linkDistance(260) .size([450,450]) .nodes(this.nodes) .links(this.links) .start();

force.on("tick", () => { $scope.$digest(); });

Define layout

const force = d3.layout.force() .charge(-60) .gravity(0.02) .linkStrength(0.1) .linkDistance(260) .size([450,450]) .nodes(this.nodes) .links(this.links) .start();

force.on("tick", () => { $scope.$digest(); });

Bind layout to data

D3 force layout + Angular

Template using force layout

<circle ng-repeat=“item in nodes" ng-attr-cx="{{ item.x }}" ng-attr-cy="{{ item.y }}"> </circle>

Bind data to markup

SCALES

ScalesTranslate from values to pixels and back

Create axis

Linear, Logarithmic, Threshold, etc.

AxisUtility for creating the DOM elements of the Axis

SEPARATION OF CONCERNS

D3use helpers to prepare data to DOM

define behaviours and attach to elements

define layouts and bind to data

Angularbind data to DOM

create directive to encapsulate components / behaviours / layouts

Read our blog:http://blog.500tech.com

www.slideshare.net/500tech

Adam Kleinadam@500tech.com

github.com/adamkleingit/d3-svg-angular