Rails don't load google maps javascript - ruby-on-rails-3

I was trying to load a simple google map in my rails application.
The problem is that the web page show only an empty web page.
Here is my index.html.erb
<script type="text/javascript" src="http://maps.google.com/maps/api/js?sensor=false"></script>
<script type="text/javascript" src="http://www.google.com/jsapi"></script>
<%= javascript_include_tag 'testmap.js' %>
<body onload="initialize(); ">
<div id="map_canvas"></div>
This is my testmap.js which is in "public/javascripts":
var map;
function initialize() {
var chicago = new google.maps.LatLng(41.850033, -87.6500523);
map = new google.maps.Map(document.getElementById('map_canvas'), {
center: chicago,
zoom: 11,
mapTypeId: 'roadmap'
});
}
The page displayed is completely empty, except for the code loaded from application.html.erb
I hope that you can help me.
Thank you

Use something like Firebug for Firefox in order to see if your JS files are loaded or not.
Maybe something like $(document).ready(function() {} is necessary (You have to wait that your content is loaded before executing your JS).

Related

Export Html to Pdf using JsReport in Asp.net core

I have a html page with images, tables and some styling with Bootstrap 4. I tried to convert the pages to pdf using the JsReportMVCService, the pdf doesnot load with the proper css class from bootstrap.
HTML CONTENT
<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="width=device-width" />
<title>WeekelyReport</title>
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.1.3/css/bootstrap.min.css">
</head>
<body>
<div class="jumbotron">
<h1> Hello John Doe,</h1>
<p>
This is a generic email about something.<br />
<br />
</p>
</div>
</body>
</html>
ASP.NET CORE IMPLEMENTATION
var generatedFile = await GeneratePDFAsync(htmlContent);
File.WriteAllBytes(#"C:\temp\hello.pdf", generatedFile);
async Task<byte[]> GeneratePDFAsync(string htmlContent)
{
var report = await JsReportMVCService.RenderAsync(new RenderRequest()
{
Template = new Template
{
Content = htmlContent,
Engine = Engine.None,
Recipe = Recipe.ChromePdf
}
});
using (var memoryStream = new MemoryStream())
{
await report.Content.CopyToAsync(memoryStream);
return memoryStream.ToArray();
}
}
How my Pdf Looks after the conversion to PDF.
It is possible to convert to pdf with the same bootstrap 4 layout? or am i missing something during the conversion here?
The pdf printing uses print media type and the bootstrap has quite different styles for printing. This causes that the pdf looks different than html, but it looks the same as you would print it. I would generally not recommend using responsive css framework as bootstrap for printing static pdf, but it is of course your choice.
To make your example looking the same on pdf you just need to change the media type on the chrome settings.
var report = await JsReportMVCService.RenderAsync(new RenderRequest()
{
Template = new Template
{
Content = htmlContent,
Engine = Engine.None,
Recipe = Recipe.ChromePdf,
Chrome = new Chrome {
MediaType = MediaType.Screen,
PrintBackground = true
}
}
});
make sure you have the latest jsreport.Types#2.2.2

Is there a way to call a function before the dependencies are loaded in Sencha Touch application

Sencha Touch application has requires:[] option to specify the list of controllers and models and stores etc that are loaded that we need for the application to work but is there a way to execute something that we need even before the loading of the dependencies. FOr e.g. I need the Browsers Language even before the loading of all dependencies. So is it possible to do?
Keep in mind: Sencha Touch is nothing but JavaScript.
You can add some script in your index.html in front of the script tag that loads the sencha microloader.
<!DOCTYPE HTML>
<html manifest="" lang="en-US">
<head>
<meta charset="UTF-8">
<title>FNL</title>
<style type="text/css">
<!-- sencha stuff -->
</style>
<script id="myScript" type="text/javascript" src="myScript.js"></script>
<!-- The line below must be kept intact for Sencha Command to build your application -->
<script id="microloader" type="text/javascript" src=".sencha/app/microloader/development.js"></script>
</head>
<body>
<div id="appLoadingIndicator">
<div></div>
<div></div>
<div></div>
</div>
</body>
</html>
I added some lines to the ST Microloader:
this.css = processAssets(manifest.css, 'css');
// Load language strings
var xhr = new XMLHttpRequest();
xhr.open('GET', 'api/Settings', false);
xhr.send(null);
var settings = eval("(" + xhr.responseText + ")");
Lang = settings.Translations[0];
Options = settings.Options[0];
// End Load Language Strings
this.js = processAssets(manifest.js, 'js');
In ExtJS i accomplished this by loading a Dependency class first
Ext.require([
'MyApp.Dependencies',
..
]);
so the Dependecies class is loaded before all controllers which looks like this
Dependencies.js:
Ext.define('MyApp.Dependencies', {
singleton: true,
init: function() {
// load translation data
}
});
MyApp.Dependecies.init();
and for completition my init function looks something like this:
inti: function(){
function loadScriptSync(url) {
var xhrObj = new XMLHttpRequest();
// open and send a synchronous request
xhrObj.open('GET', url, false);
xhrObj.send('');
// add the returned content to a newly created script tag
var se = document.createElement('script');
se.type = "text/javascript";
se.text = xhrObj.responseText;
document.getElementsByTagName('head')[0].appendChild(se);
}
var language = this.getLanguage();
loadScriptSync("resources/locale/locale." + language + ".js");
}

epub.js not loading properly on IE11

I'm trying to load an epub on my page using epub.js library and its not working on IE 11, it works perfrectly on chrome and Firefox though.
I'm not getting a script error, I don't get a message in the console log, fiddler says all scripts (including zip.js and my epub) are downloaded properly.
It just doesn't load, the iframe embedded has a src="" property and an empty html body. as in the following snapshot.
Here is my html page content:
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title></title>
<script src="content/epubjs/epub.js"></script>
<script src="content/epubjs/libs/zip.min.js"></script>
</head>
<body>
<span onclick="Book.prevPage();">Prev</span>
<span onclick="Book.nextPage();">Next</span>
<div style="height: 700px; border: 5px solid red" id="area"></div>
<script type="text/javascript">
EPUBJS.filePath = "content/epubjs/libs/";
</script>
<script type="text/javascript">
var Book = ePub("content/aliceDynamic.epub", {
version: 4,
restore: false, // Skips parsing epub contents, loading from localstorage instead
storage: false, // true (auto) or false (none) | override: 'ram', 'websqldatabase', 'indexeddb', 'filesystem'
spreads: false, // Displays two columns
fixedLayout: true, //-- Will turn off pagination
styles: {}, // Styles to be applied to epub
width: false,
height: '700px'
});
Book.renderTo("area");
</script>
</body>
</html>
I tried to play around with the options parameter, set things to false and true here and there but it didn't help.
It looks like it is a problem with the current version of epub.js and internet explorer 11. If you try and load the moby dick page you should see the same problem.
Try setting a break on all exceptions (even handled ones) in the javascript engine of IE, and you will see that the javascript throws an exception saying that "'XPathResult' is undefined".
Common recommendations to correct that seem to be installing the wicked-good-xpath library in order to sidestep ie11 lack of XPath support. Install the library and initialize it before trying to load you epub.
If this doesn't correct your problem, you may have to wait until the issues are solved since you don't seem to be the only person who encounters it.

Declaring Variables in DOJO

I am writing a JSP that displays a list of clubs in a grid. The grid shows the name of the club together with its latitude, longitude, website and description.
The actual data to be displayed is stored in a variable (a dojo.data.ItemFileWriteStore) called clubStore.
When the page is loaded, a call is made to a servlet to retrieve the data. The handling function then deletes all the items held in the store and adds new items returned by the servlet.
The JSP code is shown below:
<%# page language="java" contentType="text/html; charset=ISO-8859-1" pageEncoding="ISO-8859-1"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Clubs</title>
<style type="text/css">
#import "./dojoroot/dojo/resources/dojo.css";
#import "./dojoroot/dijit/themes/tundra/tundra.css";
#import "./dojoroot/dojox/grid/resources/Grid.css";
#import "./dojoroot/dojox/grid/resources/nihiloGrid.css";
</style>
<script type="text/javascript" src="dojoroot/dojo/dojo.js"
djConfig="parseOnLoad: true, isDebug: false">
</script>
<script language="JavaScript" type="text/javascript">
dojo.require("dojo.parser");
dojo.require("dojo.data.ItemFileWriteStore");
var clubData={
items:[{name:'No Clubs', lat:'---', lon:'---', webSite:'---', description:'---'}]
};
var layoutClub=[{field:"name", name:"Name", width:10},
{field:"lat", name:"Lat", width:5},
{field:"lon", name:"Long", width:5},
{field:"webSite", name:"Web Site", width:10},
{field:"description", name:"Description", width:'auto'}];
var clubStore=new dojo.data.ItemFileWriteStore(data:clubData});
</script>
<link rel="stylesheet" href="dojoroot/dijit/themes/claro/claro.css" />
<link rel="stylesheet" href="dojoroot/dojox/widget/Dialog/Dialog.css" />
</head>
<body class="tundra">
<%#include file="header.jsp"%>
<div id="clubGrid"
style="width: 800px;"
autoHeight="true"
data-dojo-type="dojox/grid/DataGrid"
data-dojo-props="store:clubStore,
structure:layoutClub,
query:{},
queryOptions:{'deep':true},
rowsPerPage:40">
</div>
<br>
<script>
var urlString="http://localhost:8080/BasicWeb/ClubsServlet";
dojo.xhrGet({
url: urlString,
handleAs: "text",
load: function(data) {
// remove items...
var allData=clubStore._arrayOfAllItems;
for (i=0; i<allData.length; i++) {
if (allData[i]!=null) {
clubStore.deleteItem(allData[i]);
}
}
var jsonClubArray=JSON.parse(data);
for (var i=0; i<jsonClubArray.clubs.length; i++) {
var club=jsonClubArray.clubs[i];
var newClub={name: club.clubname, lat:club.lat, lon:club.lon, webSite: club.website, description: club.description};
clubStore.newItem(newClub);
}
clubStore.save();
}
});
</script>
</body>
</html>
The script to process the servlet response sometimes fails because clubStore is undefined (debugging using Firebug). This does seem to be a spurious fault as some times everything works perfectly.
Any assistance in understanding how to define the clubStore variable would be appreciated.
Thanks.
James.
I think what might be happening is the body script is sometimes running before the head script, so it is kind of a race condition. You could try wrapping your body script into a dojo.ready. (I assume from your code that you are using dojo 1.6 or earlier since you are not using the AMD loader style.)
dojo.ready(function(){
// Put your xhr request code here.
});
You may also want to try testing with a firebug breakpoint in the head and body script. See if the head is sometimes running first.
So the problem turned out to be a syntax error in the declaration - missing '{' in the line
var clubStore=new dojo.data.ItemFileWriteStore(data:clubData});
The spurious aspect to the fault was a red herring - I had previously declared the variable as part of the DOM object and that caused a spurious fault. So I messed up my regression testing as well as introducing a syntax error!
Thanks.
James.
You could try switching the order of your require statements, so it's like this:
dojo.require("dojo.data.ItemFileWriteStore");
dojo.require("dojo.parser");
If that fails, you could set parseOnLoad to false, and then call dojo.parser.parse() after your store has been instantiated like so:
(assuming you are using dojo 1.6 or earlier based on your code)
dojo.addOnLoad(function() {
dojo.parser.parse();
});
Put your clubStore in the global space... just remove the var keyword in front of it...

"Container is not defined" Google chart

I have solved my issue but can't answer it myself since I am too new to this site:
turns out I needed to use the following:
chart = new google.visualization.PieChart(document.getElementById('pie_today_div'));
I was using JQuery to access the element, $('#pie_today_div'). As of now the evidence points to the fact that the PieChart constructor has to have standard JS code, document.getElementById('pie_today_div')
Maybe something else going on, but changing the way I access the container element fixes my code
ORIGINAL ISSUE FOR REFERENCE TO MY SOLUTION
I am getting a "Container is not defined" error when I am trying to instantiate a Google PieChart object.
I validated my page at http://validator.w3.org/ and i get a pretty green banner saying it validates.
I receive no js errors when the page loads. My Ajax call is making a full round trip with the data I want from the DB.
Here is my HTML
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html;charset=UTF-8">
<link href="/css/note.css?10022012" rel="stylesheet" type="text/css" media="screen">
<script type="text/javascript" language="javascript" src="/call/js/jquery-1.7.2.min.js"></script>
<script type="text/javascript" src="https://www.google.com/jsapi"></script>
<script type="text/javascript">google.load('visualization', '1.0', {'packages':['corechart']});</script>
<script type="text/javascript" language="javascript" src="/call/js/init.js?10042012-2"></script>
<title>Call Stats</title>
</head>
<body>
Today Stats
<div id="pie_today_div"></div>
</body>
</html>
here is the js:
function drawPieChartToday() {
$.post('/call/ajax.php5',{
action:'pieToday'
}, function(ticketData) {
var data = new google.visualization.DataTable();
data.addColumn('string', 'Count');
data.addColumn('number', 'Topic');
for (var key in ticketData){
data.addRow([key, ticketData[key]]);
}
options = {
title: 'Issue Topics'
};
alert($('#pie_today_div').attr('id'));
chart = new google.visualization.PieChart($('#pie_today_div'));
chart.draw(data, options);
},'json');
}
here is my debugging code to make sure the element was being found:
alert($('#pie_today_div').attr('id')); <-- alerts "pie_today_div"
I'm not a jquery fan, but I think that $('#pie_today_div') returns a set of matched elements. The attribute computation works because (from jquery documentation) it "gets the value of an attribute for the first element in the set of matched elements".
So try
chart = new google.visualization.PieChart($('#pie_today_div')[0]);
or directly
chart = new google.visualization.PieChart(document.getElementById('pie_today_div'));
A container error is exactly that, It is looking for the ID
example:
var chart = new google.visualization.PieChart(document.getElementById('chart_div'));
You WILL get this error “Container is not defined” for Google Charts if you are missing
that ID
Thus a Div with that chart_div id would fix this
There must be line where you load the types of visualization you want to have in your web page. It looks like this
google.load("visualization", "1", {packages: ["corechart"]});
Here I am loading package corechart. Place this line as the first line after in the <script> tag inside your HTML page like index.html. That should solve he problem.
use $timeout before init, it works well, else you need to destroy the instance
Just wanted to mention, this happened for me after a simple mistake. I changed
var data = new google.visualization.DataTable(huh);
to the following in an effort to change the chart type:
var data = new google.visualization.BarChart(huh);
but this is all wrong, you change the chart where you mention the container:
var chart = new google.visualization.ComboChart(document.getElementById('chart_div'));