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Added an example of loading a CSV client side #142

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Jun 30, 2018
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Added an example of loading a CSV client side #142

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2 changes: 1 addition & 1 deletion README.md
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Expand Up @@ -30,11 +30,11 @@ simple to build real-time & user configurable analytics entirely in the browser.
* [streaming.html](https://unpkg.com/@jpmorganchase/perspective-examples/build/streaming.html) A streaming random data demo.
* [coincap.html](https://unpkg.com/@jpmorganchase/perspective-examples/build/coincap.html) Streaming crypto currency prices via [Coincap.io](http://coincap.io/).
* [theme-material.html](https://unpkg.com/@jpmorganchase/perspective-examples/build/theme-material.html) Material theme example.
* [csv.html](https://unpkg.com/@jpmorganchase/perspective-examples/build/csv.html) Upload a CSV of your own.

## Documentation

* [Project Site](https://jpmorganchase.github.io/perspective/)

* [Installation](https://jpmorganchase.github.io/perspective/docs/installation.html)
* [User's Guide](https://jpmorganchase.github.io/perspective/docs/usage.html)
* [Perspective API](https://jpmorganchase.github.io/perspective/docs/perspective_api.html)
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151 changes: 151 additions & 0 deletions packages/perspective-examples/src/html/csv.html
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@@ -0,0 +1,151 @@
<!--

Copyright (c) 2017, the Perspective Authors.

This file is part of the Perspective library, distributed under the terms of
the Apache License 2.0. The full license can be found in the LICENSE file.

-->

<!DOCTYPE html>
<html>
<head>

<meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1, minimum-scale=1">

<script src="mobile_fix.js"></script>
<script src="perspective.view.js"></script>
<script src="hypergrid.plugin.js"></script>
<script src="highcharts.plugin.js"></script>

<link rel='stylesheet' href="demo.css">
<link rel='stylesheet' href="material.css">

<style>

#drop-area {
border: 1px solid #ccc;
width: 480px;
font-family: sans-serif;
margin: 100px auto;
padding: 48px;
}
#drop-area.highlight {
border-color: purple;
}
p {
margin-top: 0;
}
.my-form {
margin-bottom: 10px;
}
#gallery {
margin-top: 10px;
}
#gallery img {
width: 150px;
margin-bottom: 10px;
margin-right: 10px;
vertical-align: middle;
}
.button {
display: inline-block;
padding: 10px;
background: #ccc;
cursor: pointer;
border-radius: 5px;
border: 1px solid #ccc;
}
.button:hover {
background: #ddd;
}
#fileElem {
display: none;
}
</style>

</head>
<body>

<!-- <perspective-viewer>

</perspective-viewer> -->

<div id="drop-area">
<form class="my-form">
<p>Upload a CSV file by dragging from your desktop and dropping onto the dashed region.</p>
<p>(Data is processed in browser, and never sent to any server).</p>
<input type="file" id="fileElem" multiple accept="text/csv" onchange="handleFiles(this.files)">
<label class="button" for="fileElem">Select a file</label>
</form>
</div>

<script>

window.addEventListener('WebComponentsReady', function () {
var dropArea = document.getElementById('drop-area')

dropArea.addEventListener('dragenter', () => {}, false);
dropArea.addEventListener('dragleave', () => {}, false);
dropArea.addEventListener('dragover', () => {}, false);
dropArea.addEventListener('drop', x => {
console.log(x);
}, false);

;['dragenter', 'dragover', 'dragleave', 'drop'].forEach(eventName => {
dropArea.addEventListener(eventName, preventDefaults, false)
})

function preventDefaults (e) {
e.preventDefault();
e.stopPropagation();
}

;['dragenter', 'dragover'].forEach(eventName => {
dropArea.addEventListener(eventName, highlight, false)
})

;['dragleave', 'drop'].forEach(eventName => {
dropArea.addEventListener(eventName, unhighlight, false)
})

function highlight(e) {
dropArea.classList.add('highlight')
}

function unhighlight(e) {
dropArea.classList.remove('highlight')
}

dropArea.addEventListener('drop', handleDrop, false)

function handleDrop(e) {
let dt = e.dataTransfer
let files = dt.files

handleFiles(files)
}

function handleFiles(files) {
([...files]).forEach(uploadFile)
}

function uploadFile(file) {
let reader = new FileReader();
reader.onload = function (fileLoadedEvent) {
let txt = fileLoadedEvent.target.result;
const parent = dropArea.parentElement;
parent.removeChild(dropArea);
let psp = document.createElement('perspective-viewer');
parent.appendChild(psp);
psp.load(txt);
}
reader.readAsText(file);
}
// document.getElementsByTagName('perspective-viewer')[0].load(xhr.response);
});

</script>

</body>
</html>