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React Native and D3 Workshop
January 19, 2017
React Native and D3 Workshop
January 19, 2017
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React Native, SVG, and D3 hswolff @hswolff
Harry Wolff Senior UI Engineer @ MongoDB.com Blog @ hswolff.com
Twitter @ hswolff GitHub @ hswolff
What do I know about React Native?
Chartbeat iOS http://blog.chartbeat.com/2016/04/07/say-hello-to-the-all-new-chartbeat-ios-app/
React Native D3JS D3JS and React Native Project
Exercise 1 Let’s install some prerequisites. https://facebook.github.io/react-native/docs/ getting-started.html Everything up
to “Testing your React Native Installation” section.
What is React Native?
A framework for building native apps with React
React Native is built on top of React
How does this work?
(iOS / Android) …and handles passing information between the two environments More details: http://tadeuzagallo.com/ blog/react-native-bridge/
How is React Native different than React?
React Native Packager https://github.com/facebook/react- native/tree/master/packager
Exercise 1 1. You should have node, watchman, and either
Xcode or Android Studio installed. 2. Install React Native CLI: npm install -g react- native-cli 3. react-native init ReactNativeAndD3Workshop 4. cd ReactNativeAndD3Workshop/ 5. react-native run-ios (or react-native run-android)
What is SVG?
SVG XML-based vector image format
SVG • XML: markup language • Human and machine readable
• Vector image: use of polygons to represent images • Can be resized without losing quality
SVG Elements • Root element: SVG • Creates an SVG
fragment, own viewport and coordinate system • Graphic elements: <circle>, <ellipse>, <image>, <line>, <mesh>, <path>, <polygon>, <polyline>, <rect>, <text>, <use>
Exercise 2 https://codepen.io/hswolff/pen/ZLpgzy
SVG <path> https://developer.mozilla.org/en-US/docs/Web/SVG/ Tutorial/Paths “Paths create complex shapes by combining
multiple straight lines or curved lines” “The shape of a path element is deﬁned by one attribute: d.”
SVG <path> Create graphics using line commands Move to x
10, y 10 Horizontal line of 90 Vertical line of 90 Horizontal line of 10 Line to x 10, y 10
What is D3JS?
“D3 helps you bring data to life using HTML, SVG,
and CSS.” https://d3js.org/
D3 4.0 Now Modular
d3-scale https://github.com/d3/d3-scale “Continuous scales map a continuous, quantitative input domain
to a continuous output range.” Continuous Scales “Given a value from the domain, returns the corresponding value from the range.”
d3-scale https://github.com/d3/d3-scale “Time scales are a variant of linear scales
that have a temporal domain: domain values are coerced to dates rather than numbers" Time Scales
d3-shape https://github.com/d3/d3-shape “line generator can then be used to compute
the d attribute of an SVG path element”
Exercise 3 https://codepen.io/hswolff/pen/qRaGOE
Exercise 3 Answer https://codepen.io/hswolff/pen/egdqbL
How does D3JS work with React Native?
ART https://github.com/sebmarkbage/art “ART is a retained mode vector drawing API”
drawing vector graphics using React.” “It provides declarative and reactive bindings to the ART library.”
React ART https://github.com/reactjs/react-art
React Native ART https://github.com/facebook/react-native/tree/master/
Exercise 4 Let’s get React Native ART working!
Link ART https://facebook.github.io/react-native/docs/linking- libraries-ios.html#manual-linking
Exercise 4 Link React Native ART: http://facebook.github.io/react- native/docs/linking-libraries-ios.html $ open
node_modules/react-native/Libraries/ART $ react-native run-ios
Exercise 4 Use the React Native ART Component
index.ios.js js/ Page.js Graph.js Part 1: App structure
index.ios.js js/ Page.js Graph.js ﬁxtures.js graph-utils.js Part 2: Graph
index.ios.js js/ Page.js Graph.js ﬁxtures.js graph-utils.js Part 3: X Axis
index.ios.js js/ Page.js Graph.js ﬁxtures.js graph-utils.js Part 4: Y Axis
index.ios.js js/ Page.js Graph.js ﬁxtures.js graph-utils.js ControlButton.js Part 5: Buttons
index.ios.js js/ Page.js Graph.js ﬁxtures.js graph-utils.js ControlButton.js Part 6: Animate!
Full featured app
Open Sourced https://github.com/hswolff/ BetterWeather
Resources https://speakerdeck.com/hswolff/react-native- and-d3js https://d3js.org/ http://hswolff.com/blog/react-native-art-and-d3/ https://github.com/hswolff/BetterWeather
React Native, SVG, and D3 hswolff @hswolff https://speakerdeck.com/hswolff/react-native-and-d3js