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interactive-animation.html
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<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<meta
name="viewport"
content="initial-scale=1,maximum-scale=1,user-scalable=no"
/>
<title>Animate color visual variable - 4.15</title>
<link
rel="stylesheet"
href="https://js.arcgis.com/4.15/esri/themes/dark-blue/main.css"
/>
<script src="https://js.arcgis.com/4.15/"></script>
<script>
require([
"esri/Map",
"esri/layers/FeatureLayer",
"esri/views/MapView",
"esri/core/promiseUtils",
"esri/widgets/Legend",
"esri/widgets/Home",
"esri/widgets/Slider",
"esri/widgets/Fullscreen"
], function(
Map,
FeatureLayer,
MapView,
promiseUtils,
Legend,
Home,
Slider,
Fullscreen
) {
// set up event handlers
//
//
let mouseX, mouseY;
console.log(document.body.clientWidth, document.body.clientHeight);
var throttling = false;
function throttle (callback, limit) {
return function () {
if (!throttling) {
callback.call();
throttling = true;
setTimeout(function () {
throttling = false;
}, limit);
}
}()
}
document.addEventListener('mousemove', e => {
mouseX = e.offsetX;
mouseY = e.offsetY;
let percent = mouseX/document.body.clientWidth;
let year = 1880 + Math.floor((2017-1880) * percent);
throttle(() => setYear(year), 100);
});
//--------------------------------------------------------------------------
//
// Setup Map and View
//
//--------------------------------------------------------------------------
var layer = new FeatureLayer({
portalItem: {
id: "dfe2d606134546f5a712e689d76540ac"
},
definitionExpression: "CNSTRCT_YR > 0",
title: "Building Footprints",
minScale: 72223.819286
});
window.layer = layer;
var map = new Map({
basemap: {
portalItem: {
id: "4f2e99ba65e34bb8af49733d9778fb8e"
}
},
layers: [layer]
});
var view = new MapView({
map: map,
container: "viewDiv",
center: [-73.967569, 40.727724],
zoom: 12,
constraints: {
snapToZoom: false,
minScale: 72223.819286
},
// This ensures that when going fullscreen
// The top left corner of the view extent
// stays aligned with the top left corner
// of the view's container
resizeAlign: "top-left"
});
window.view = view;
//--------------------------------------------------------------------------
//
// Setup UI
//
//--------------------------------------------------------------------------
var applicationDiv = document.getElementById("applicationDiv");
var sliderValue = document.getElementById("sliderValue");
var playButton = document.getElementById("playButton");
var titleDiv = document.getElementById("titleDiv");
var animation = null;
var slider = new Slider({
container: "slider",
min: 1880,
max: 2017,
values: [1984],
step: 1,
visibleElements: {
rangeLabels: true
}
});
// When user drags the slider:
// - stops the animation
// - set the visualized year to the slider one.
function inputHandler(event) {
stopAnimation();
setYear(event.value);
}
slider.on("thumb-drag", inputHandler);
// Toggle animation on/off when user
// clicks on the play button
playButton.addEventListener("click", function() {
if (playButton.classList.contains("toggled")) {
stopAnimation();
} else {
startAnimation();
}
});
view.ui.empty("top-left");
view.ui.add(titleDiv, "top-left");
view.ui.add(
new Home({
view: view
}),
"top-left"
);
view.ui.add(
new Legend({
view: view
}),
"bottom-left"
);
view.ui.add(
new Fullscreen({
view: view,
element: applicationDiv
}),
"top-right"
);
// When the layerview is available, setup hovering interactivity
view.whenLayerView(layer).then(setupHoverTooltip);
// Starts the application by visualizing year 1984
layer.renderer = createRenderer(1984);
//--------------------------------------------------------------------------
//
// Methods
//
//--------------------------------------------------------------------------
/**
* Sets the current visualized construction year.
*/
function setYear(value) {
sliderValue.innerHTML = Math.floor(value);
slider.viewModel.setValue(0, value);
layer.renderer.set('visualVariables', updateRenderer(value));
layer.renderer = layer.renderer.clone(); // clone to force renderer refresh
}
/**
* Returns a renderer with a color visual variable driven by the input
* year. The selected year will always render buildings built in that year
* with a light blue color. Buildings built 20+ years before the indicated
* year are visualized with a pink color. Buildings built within that
* 20-year time frame are assigned a color interpolated between blue and pink.
*/
function updateRenderer(year) {
return [
{
type: "opacity",
field: "CNSTRCT_YR",
stops: [
{
opacity: 1,
value: year
},
{
opacity: 0,
value: year + 1
}
]
},
{
type: "color",
field: "CNSTRCT_YR",
legendOptions: {
title: "Built:"
},
stops: [
{
value: year,
color: "#0ff",
label: "in " + Math.floor(year)
},
{
value: year - 10,
color: "#f0f",
label: "in " + (Math.floor(year) - 20)
},
{
value: year - 50,
color: "#404",
label: "before " + (Math.floor(year) - 50)
}
]
}
]
}
function createRenderer(year) {
var opacityStops = [
{
opacity: 1,
value: year
},
{
opacity: 0,
value: year + 1
}
];
return {
type: "simple",
symbol: {
type: "simple-fill",
color: "rgb(0, 0, 0)",
outline: null
},
visualVariables: [
{
type: "opacity",
field: "CNSTRCT_YR",
stops: opacityStops,
legendOptions: {
showLegend: false
}
},
{
type: "color",
field: "CNSTRCT_YR",
legendOptions: {
title: "Built:"
},
stops: [
{
value: year,
color: "#0ff",
label: "in " + Math.floor(year)
},
{
value: year - 10,
color: "#f0f",
label: "in " + (Math.floor(year) - 20)
},
{
value: year - 50,
color: "#404",
label: "before " + (Math.floor(year) - 50)
}
]
}
]
};
}
/**
* Sets up a moving tooltip that displays
* the construction year of the hovered building.
*/
function setupHoverTooltip(layerview) {
var highlight;
var tooltip = createTooltip();
var hitTest = promiseUtils.debounce(function(event) {
return view.hitTest(event).then(function(hit) {
var results = hit.results.filter(function(result) {
return result.graphic.layer === layer;
});
if (!results.length) {
return null;
}
return {
graphic: results[0].graphic,
screenPoint: hit.screenPoint
};
});
});
view.on("pointer-move", function(event) {
return hitTest(event).then(
function(hit) {
// remove current highlighted feature
if (highlight) {
highlight.remove();
highlight = null;
}
// highlight the hovered feature
// or hide the tooltip
if (hit) {
var graphic = hit.graphic;
var screenPoint = hit.screenPoint;
highlight = layerview.highlight(graphic);
tooltip.show(
screenPoint,
"Built in " + graphic.getAttribute("CNSTRCT_YR")
);
} else {
tooltip.hide();
}
},
function() {}
);
});
}
/**
* Starts the animation that cycle
* through the construction years.
*/
function startAnimation() {
stopAnimation();
animation = animate(slider.values[0]);
playButton.classList.add("toggled");
}
/**
* Stops the animations
*/
function stopAnimation() {
if (!animation) {
return;
}
animation.remove();
animation = null;
playButton.classList.remove("toggled");
}
/**
* Animates the color visual variable continously
*/
function animate(startValue) {
var animating = true;
var value = startValue;
var frame = function(timestamp) {
if (!animating) {
return;
}
value += 0.5;
if (value > 2017) {
value = 1880;
}
setYear(value);
// Update at 30fps
setTimeout(function() {
requestAnimationFrame(frame);
}, 1000 / 30);
};
frame();
return {
remove: function() {
animating = false;
}
};
}
/**
* Creates a tooltip to display a the construction year of a building.
*/
function createTooltip() {
var tooltip = document.createElement("div");
var style = tooltip.style;
tooltip.setAttribute("role", "tooltip");
tooltip.classList.add("tooltip");
var textElement = document.createElement("div");
textElement.classList.add("esri-widget");
tooltip.appendChild(textElement);
view.container.appendChild(tooltip);
var x = 0;
var y = 0;
var targetX = 0;
var targetY = 0;
var visible = false;
// move the tooltip progressively
function move() {
x += (targetX - x) * 0.1;
y += (targetY - y) * 0.1;
if (Math.abs(targetX - x) < 1 && Math.abs(targetY - y) < 1) {
x = targetX;
y = targetY;
} else {
requestAnimationFrame(move);
}
style.transform =
"translate3d(" + Math.round(x) + "px," + Math.round(y) + "px, 0)";
}
return {
show: function(point, text) {
if (!visible) {
x = point.x;
y = point.y;
}
targetX = point.x;
targetY = point.y;
style.opacity = 1;
visible = true;
textElement.innerHTML = text;
move();
},
hide: function() {
style.opacity = 0;
visible = false;
}
};
}
});
</script>
<style>
html,
body {
width: 100%;
height: 100%;
padding: 0;
margin: 0;
}
#applicationDiv {
position: absolute;
width: 100%;
height: 100%;
display: flex;
flex-direction: column;
overflow: hidden;
}
#viewDiv {
width: 100%;
height: 100%;
flex: 1 1 auto;
order: 1;
}
#titleDiv {
font-weight: 400;
font-style: normal;
font-size: 1.2019rem;
padding: 10px;
}
#sliderContainer {
flex: 0 0 80px;
order: 2;
display: flex;
flex-flow: row;
padding: 0 12px;
}
#sliderValue {
flex: 0 0 100px;
order: 1;
display: flex;
justify-content: center;
flex-direction: column;
text-align: center;
font-size: 300%;
}
#sliderInnerContainer {
flex: 1 1 auto;
order: 2;
display: flex;
flex-direction: column;
justify-content: center;
padding: 0 20px;
}
#slider {
width: 100%;
}
/**
* Play/Stop toggle button
*/
#playButton {
flex: 0 0 100px;
order: 3;
margin: 20px 0;
}
.toggle-button {
display: flex;
}
.toggle-button.toggled .toggle-button-icon {
color: #cc1b1b;
}
.toggle-button .toggle-button-icon {
color: #1bcc1b;
}
.toggle-button > :nth-child(2) {
display: none;
}
.toggle-button.toggled > :nth-child(1) {
display: none;
}
.toggle-button.toggled > :nth-child(2) {
display: block;
}
/**
* Hover tooltip
*/
.tooltip {
position: absolute;
pointer-events: none;
transition: opacity 200ms;
}
.tooltip > div {
margin: 0 auto;
padding: 12px;
border-radius: 4px;
box-shadow: 0px 0px 4px rgba(255, 255, 255, 0.75);
transform: translate3d(-50%, -125%, 0);
}
</style>
</head>
<body>
<div id="applicationDiv">
<div id="viewDiv">
<div id="titleDiv" class="esri-widget">New York Construction</div>
</div>
<div id="sliderContainer" class="esri-widget">
<span id="sliderValue"></span>
<div id="sliderInnerContainer">
<div id="slider"></div>
</div>
<div
id="playButton"
class="esri-widget esri-widget--button toggle-button"
>
<div>
<span
class="toggle-button-icon esri-icon-play"
aria-label="play icon"
></span>
Play
</div>
<div>
<span
class="toggle-button-icon esri-icon-pause"
aria-label="pause icon"
></span>
Pause
</div>
</div>
</div>
</div>
</body>
</html>