init repo
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nikolay ivanov
282
OfficeWeb/sdk/Common/Charts/docs/annotate_persist.html
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282
OfficeWeb/sdk/Common/Charts/docs/annotate_persist.html
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<!DOCTYPE html >
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<html>
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<head>
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<meta http-equiv="X-UA-Compatible" content="chrome=1">
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<!--
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/**
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* o------------------------------------------------------------------------------o
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* | This file is part of the OfficeExcel package - you can learn more at: |
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* | |
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* | http://www.OfficeExcel.net |
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* | |
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* | This package is licensed under the OfficeExcel license. For all kinds of business |
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* | purposes there is a small one-time licensing fee to pay and for non |
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* | commercial purposes it is free to use. You can read the full license here: |
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* | |
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* | http://www.OfficeExcel.net/LICENSE.txt |
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* o------------------------------------------------------------------------------o
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*/
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-->
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<title>Making your annotations shareable across different browsers</title>
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<meta name="keywords" content="OfficeExcel html5 canvas chart docs annotating shareable cross browser" />
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<meta name="description" content="Making annotations shareable across different browsers" />
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<meta name="googlebot" content="NOODP">
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<meta property="og:title" content="OfficeExcel: HTML5 Javascript charts library" />
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<meta property="og:description" content="A chart library based on the HTML5 canvas tag" />
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<meta property="og:image" content="http://www.OfficeExcel.net/images/logo.png"/>
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<link rel="stylesheet" href="../css/website.css" type="text/css" media="screen" />
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<link rel="icon" type="image/png" href="../images/favicon.png">
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<!-- Place this tag in your head or just before your close body tag -->
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<script type="text/javascript" src="https://apis.google.com/js/plusone.js"></script>
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<script src="../libraries/OfficeExcel.common.core.js"></script>
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<script src="../libraries/OfficeExcel.common.annotate.js"></script>
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<script src="../libraries/OfficeExcel.common.context.js"></script>
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<script src="../libraries/OfficeExcel.line.js"></script>
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<!--[if lt IE 9]><script src="../excanvas/excanvas.original.js"></script><![endif]-->
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<script>
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/**
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* The function that loads the annotations from the server
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*/
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function LoadAnnotations ()
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{
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var canvasPosition = OfficeExcel.getCanvasXY(g.canvas);
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var div = document.createElement('DIV');
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div.style.backgroundColor = 'white';
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div.style.padding = '3px';
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div.style.position = 'absolute';
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div.style.left = canvasPosition[0] + 5 + 'px';
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div.style.top = canvasPosition[1] + 5 + 'px';
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div.style.color = 'gray';
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div.style.opacity = 1;
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div.style.border = '2px solid black';
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div.style.zIndex = 99;
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div.innerHTML = 'Loading annotations...';
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document.body.appendChild(div);
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div2 = document.createElement('DIV');
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div2.style.backgroundColor = 'gray';
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div2.style.opacity = 0.5;
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div2.style.position = 'absolute';
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div2.style.left = canvasPosition[0] + 'px';
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div2.style.top = canvasPosition[1] + 'px';
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div2.style.width = g.canvas.width + 'px';
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div2.style.height = g.canvas.height + 'px';
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//div2.style.zIndex = 98;
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document.body.appendChild(div2);
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window.localStorage['__OfficeExcel_annotations_cvs__'] = '';
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AjaxGet('annotate_persist.html?getannotations=12',
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function ()
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{
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if (this.readyState == 4 && this.status == 200) {
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window.localStorage['__OfficeExcel_annotations_cvs__'] = this.responseText;
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OfficeExcel.ReplayAnnotations(g);
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setTimeout(function () {div.style.opacity = 0.8; div2.style.opacity = 0.4;}, 50);
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setTimeout(function () {div.style.opacity = 0.6;div2.style.opacity = 0.3;}, 100);
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setTimeout(function () {div.style.opacity = 0.4;div2.style.opacity = 0.2;}, 150);
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setTimeout(function () {div.style.opacity = 0.2;div2.style.opacity = 0.1;}, 200);
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setTimeout(function () {div.style.opacity = 0;div2.style.opacity = 0;}, 250);
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setTimeout(function () {div.style.display = 'none';div2.style.display = 'none';}, 300);
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}
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}
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);
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}
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/**
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* The function that saves annotations to the server
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*/
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function SaveAnnotations ()
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{
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var canvasPosition = OfficeExcel.getCanvasXY(g.canvas);
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var div = document.createElement('DIV');
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div.style.backgroundColor = 'white';
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div.style.padding = '3px';
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div.style.position = 'absolute';
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div.style.left = canvasPosition[0] + 5 + 'px';
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div.style.top = canvasPosition[1] + 5 + 'px';
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div.style.color = 'gray';
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div.style.opacity = 1;
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div.style.border = '2px solid black';
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div.style.zIndex = 99;
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div.innerHTML = 'Saving annotations...';
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document.body.appendChild(div);
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AjaxPost('annotate_persist.html', 'data=' + window.localStorage['__OfficeExcel_annotations_cvs__']);
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setTimeout(function () {div.style.opacity = 0.8}, 50);
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setTimeout(function () {div.style.opacity = 0.6}, 100);
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setTimeout(function () {div.style.opacity = 0.4}, 150);
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setTimeout(function () {div.style.opacity = 0.2}, 200);
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setTimeout(function () {div.style.opacity = 0; div.style.display = 'none';}, 250);
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}
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/**
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* Makes an AJAX POST.
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*/
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function AjaxPost (url, data)
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{
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// Mozilla, Safari, ...
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if (window.XMLHttpRequest) {
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var httpRequest = new XMLHttpRequest();
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// MSIE
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} else if (window.ActiveXObject) {
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var httpRequest = new ActiveXObject("Microsoft.XMLHTTP");
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}
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//httpRequest.onreadystatechange = callback;
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httpRequest.open('POST', url, true);
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httpRequest.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");
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httpRequest.send(data);
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}
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/**
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* Makes an AJAX call. It calls the given callback (a function) when ready
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*
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* @param string url The URL to retrieve
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* @param function callback A function object that is called when the response is ready, there's an example below
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* called "myCallback".
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*/
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function AjaxGet (url, callback)
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{
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// Mozilla, Safari, ...
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if (window.XMLHttpRequest) {
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var httpRequest = new XMLHttpRequest();
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// MSIE
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} else if (window.ActiveXObject) {
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var httpRequest = new ActiveXObject("Microsoft.XMLHTTP");
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}
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httpRequest.onreadystatechange = callback;
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httpRequest.open('GET', url, true);
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httpRequest.send();
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}
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window.onload = function (e)
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{
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/**
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* This clears the locally stored annotations so that they can be loaded from server
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*/
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window.localStorage['__OfficeExcel_annotations_cvs__'] = '';
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// Purposefully a global
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g = new OfficeExcel.Line('cvs', [5,6,3,4,8,6,7,5,9]);
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g.Set('chart.tickmarks', 'endcircle');
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g.Set('chart.hmargin', 5);
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g.Set('chart.annotatable', OfficeExcel.isOld() ? false : true);
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g.Set('chart.labels', ['Ben','Olga','Jeff','Indigo','Kev','Pete','Lou','Fred','John']);
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g.Set('chart.contextmenu', OfficeExcel.isOld() ? null : [['Show palette', OfficeExcel.Showpalette], ['Clear', function () {OfficeExcel.Clear(g.canvas);g.Draw();}]]);
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g.Set('chart.shadow', true);
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g.Set('chart.linewidth', 1.01);
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g.Set('chart.ylabels.count', 10);
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g.Draw();
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LoadAnnotations();
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OfficeExcel.AddCustomEventListener(g, 'onannotateend', function (obj) {SaveAnnotations();});
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OfficeExcel.AddCustomEventListener(g, 'onannotateclear', function (obj) {SaveAnnotations();});
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}
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</script>
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<?php PrintAnalyticsCode() ?>
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</head>
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<body>
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<!-- Social networking buttons -->
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<?php
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$prefix = substr($_SERVER['SERVER_NAME'], 0, 3);
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require("/OfficeExcel.{$prefix}/social.html");
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?>
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<!-- Social networking buttons -->
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<div id="breadcrumb">
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<a href="../index.html">OfficeExcel: HTML5 Javascript charts library</a>
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>
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<a href="./index.html">Documentation</a>
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>
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Cross-browser annotations
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</div>
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<h1>Making <span>annotations shareable cross browser</span></h1>
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<div style="text-align: center">
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<div class="warning" style="display: inline-block">
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This example does not work offline - you must use a website. Annotations are removed every five minutes.
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</div>
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</div>
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<script>
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if (OfficeExcel.isOld()) {
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document.write('<div style="background-color: #fee; border: 2px dashed red; padding: 5px"><b>Important</b><br /><br /> Internet Explorer does not natively support the HTML5 canvas tag, so if you want to see the charts, you can either:<ul><li>Install <a href="http://code.google.com/chrome/chromeframe/">Google Chrome Frame</a></li><li>Use ExCanvas. This is provided in the OfficeExcel Archive.</li><li>Use another browser entirely. Your choices are Firefox 3.5+, Chrome 2+, Safari 4+ or Opera 10.5+. </li></ul> <b>Note:</b> Internet Explorer 9 fully supports the canvas tag.</div>');
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}
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</script>
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<canvas id="cvs" width="600" height="250" style="float: right">[No canvas support]</canvas>
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<p>
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Combining a little AJAX and some very simple server side scripting, you can easily make an annotation system that can persist
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across different browsers and computers. You an either use Load/Save buttons to trigger the loading and saving, or like the
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example to the right you can make use of the custom OfficeExcel onannotateend event to make it happen automatically.
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</p>
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<p>
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This simple example uses a small PHP server side script that loads and saves the annotation data to a file on the server,
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and that looks like this:
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</p>
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<br clear="all" />
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<pre class="code">
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<?php
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$file = '/tmp/annotation_data';
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/**
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* Save the annotations to a tmp file
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*/
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if (isset($_POST) && isset($_POST['data'])) {
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file_put_contents($file, $_POST['data']);
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exit;
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}
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/**
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* Load the annotations
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*/
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if (!empty($_GET['getannotations']) && $_GET['getannotations'] == 1) {
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$contents = file_get_contents($file);
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print($contents);
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exit;
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}
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?>
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</pre>
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<p>
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By making the Javascript Save/Load functions repeat themselves every few seconds, you could easily make a presentation/demo system
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that can be used when paticipants are in differing locations - in a similar fashion to Google Docs - or when you want one persons
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annotations to be viewable by multiple PCs. On this page though, the Save function is triggered by the custom OfficeExcel event
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<i>onannotateend</i>.
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</p>
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</body>
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</html>
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