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transition.js
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transition.js
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/* eslint no-console: 0 */
import createScatterplot from '../src';
import { saveAsPng, checkSupport } from './utils';
const canvas = document.querySelector('#canvas');
const numPointsEl = document.querySelector('#num-points');
const numPointsValEl = document.querySelector('#num-points-value');
const pointSizeEl = document.querySelector('#point-size');
const pointSizeValEl = document.querySelector('#point-size-value');
const opacityEl = document.querySelector('#opacity');
const opacityValEl = document.querySelector('#opacity-value');
const clickLassoInitiatorEl = document.querySelector('#click-lasso-initiator');
const resetEl = document.querySelector('#reset');
const exportEl = document.querySelector('#export');
const exampleEl = document.querySelector('#example-transition');
exampleEl.setAttribute('class', 'active');
exampleEl.removeAttribute('href');
let points = [];
let pointStates = [];
let numPoints = 100000;
let pointSize = 2;
let opacity = 0.33;
let selection = [];
const lassoMinDelay = 10;
const lassoMinDist = 2;
const showReticle = true;
const reticleColor = [1, 1, 0.878431373, 0.33];
const selectHandler = ({ points: selectedPoints }) => {
console.log('Selected:', selectedPoints);
selection = selectedPoints;
if (selection.length === 1) {
const point = points[selection[0]];
console.log(
`X: ${point[0]}\nY: ${point[1]}\nCategory: ${point[2]}\nValue: ${point[3]}`
);
}
};
const deselectHandler = () => {
console.log('Deselected:', selection);
selection = [];
};
const scatterplot = createScatterplot({
canvas,
lassoMinDelay,
lassoMinDist,
pointSize,
showReticle,
reticleColor,
lassoInitiator: true,
});
checkSupport(scatterplot);
exportEl.addEventListener('click', () => saveAsPng(scatterplot));
console.log(`Scatterplot v${scatterplot.get('version')}`);
scatterplot.subscribe('select', selectHandler);
scatterplot.subscribe('deselect', deselectHandler);
const generatePoints = (num) => [
...new Array(Math.round(num / 2)).fill().map(() => [
-1 + Math.random(), // x
-1 + (Math.random() * 2) / 3, // y
0, // category
Math.random() * 0.33, // value
]),
...new Array(Math.round(num / 2)).fill().map(() => [
Math.random(), // x
-1 + Math.random() * 2, // y
1, // category
0.66 + Math.random() * 0.33, // value
]),
];
const setNumPoint = (newNumPoints) => {
numPoints = newNumPoints;
numPointsEl.value = numPoints;
numPointsValEl.innerHTML = numPoints;
points = generatePoints(numPoints);
pointStates = [
points,
points.map(([x, y, c, v], j) =>
j < points.length / 2
? [x, (y + 1) * 3 - 1, c, v + 0.66]
: [x, (y + 1) / 3 - 1, c, v - 0.66]
),
];
scatterplot.draw(points);
};
const numPointsInputHandler = (event) => {
numPointsValEl.innerHTML = `${+event.target
.value} <em>release to redraw</em>`;
};
numPointsEl.addEventListener('input', numPointsInputHandler);
const numPointsChangeHandler = (event) => setNumPoint(+event.target.value);
numPointsEl.addEventListener('change', numPointsChangeHandler);
const setPointSize = (newPointSize) => {
pointSize = newPointSize;
pointSizeEl.value = pointSize;
pointSizeValEl.innerHTML = pointSize;
scatterplot.set({ pointSize });
};
const pointSizeInputHandler = (event) => setPointSize(+event.target.value);
pointSizeEl.addEventListener('input', pointSizeInputHandler);
const setOpacity = (newOpacity) => {
opacity = newOpacity;
opacityEl.value = opacity;
opacityValEl.innerHTML = opacity;
scatterplot.set({ opacity });
};
const opacityInputHandler = (event) => setOpacity(+event.target.value);
opacityEl.addEventListener('input', opacityInputHandler);
const clickLassoInitiatorChangeHandler = (event) => {
scatterplot.set({
lassoInitiator: event.target.checked,
});
};
clickLassoInitiatorEl.addEventListener(
'change',
clickLassoInitiatorChangeHandler
);
clickLassoInitiatorEl.checked = scatterplot.get('lassoInitiator');
const resetClickHandler = () => {
scatterplot.reset();
};
resetEl.addEventListener('click', resetClickHandler);
const colorsCat = ['#3a78aa', '#aa3a99'];
scatterplot.set({ colorBy: 'category', pointColor: colorsCat });
const colorsScale = [
'#ff80cb', // bright pink
'#df80b8',
'#bf80a5',
'#9f8092',
'#808080',
'#75919f',
'#6ba3bf',
'#61b5df',
'#57c7ff', // bright blue
];
scatterplot.set({ colorBy: 'value', pointColor: colorsScale });
setPointSize(pointSize);
setOpacity(opacity);
setNumPoint(numPoints);
let i = 0;
const transitionPoints = () => {
i++;
scatterplot
.draw(pointStates[i % pointStates.length], {
transition: true,
transitionDuration: 1000 - ((i - 1) % 5) * 150,
transitionEasing: 'quadInOut',
})
.then(() => {
setTimeout(transitionPoints, +!(i % 5) * 3000);
});
};
transitionPoints();