The Big Programming Thread - Page 387

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1. This is not a "do my homework for me" thread. If you have specific questions, ask, but don't post an assignment or homework problem and expect an exact solution.
2. No recruiting for your cockamamie projects (you won't replace facebook with 3 dudes you found on the internet and $20)
3. If you can't articulate why a language is bad, don't start slinging shit about it. Just remember that nothing is worse than making CSS IE6 compatible.
4. Use [code] tags to format code blocks.

sluggaslamoo

Australia4494 Posts

November 06 2013 22:47 GMT

#7721

On November 07 2013 00:31 AsmodeusXI wrote:
Question for the wizards in here: does anyone have any recommendations for a JavaScript library/framework for games development? I'm interested in doing game creation in HTML5 and there are a LOT of options out there, so I'm looking for some opinions.

Client side only (whole game is loaded in the browser with no interaction on server besides assets).

Or

Online multiplayer?

EaselJS is something which is like SDL for HTML5 Canvas, its quite good.
http://www.createjs.com/#!/EaselJS

Also I like to use coffeescript instead of javascript, its much nicer to code in.

I don't have a lot of experience in using off the market pre-made game engines in JS, but HTML5 Canvas is very easy to use and fast enough that you don't need to bother with optimisations for something simple. I think anything you find on google should be good enough, its not like the old days where there was a ton of boiler plate involved with drivers and there were big differences even in amateur engines (e.g 2D with .ini files vs 2.5D with relational database).

Also if you are going to use Coffeescript make sure to put undefined at the end of any long loops in order to prevent it building an array and returning it which while it is useful in web-development, it is costly for games.

Cyx.

Canada806 Posts

November 06 2013 22:55 GMT

#7722

On November 07 2013 06:03 Zorkmid wrote:

Show nested quote +

I wasn't really responding to anything you said, just giving one point of view on IDEs as a learning tool. No need for the saltyness.

Sorryyyy lol, I meant that I had posted without reading, I wasn't saying anything about you ^^ badly worded, my bad.

Zorkmid

4410 Posts

November 07 2013 00:14 GMT

#7723

Ah, my bad.

Birdie

New Zealand4438 Posts

November 07 2013 01:59 GMT

#7724

I'm streaming (and will be streaming this week and for several weeks) StarServer development (a new BW server). Feel free to have a look, and give tips and advice, as I'm a pretty noobie programmer. http://www.twitch.tv/birdietelevision

Zorkmid

4410 Posts

November 07 2013 03:19 GMT

#7725

On November 07 2013 10:59 Birdie wrote:
I'm streaming (and will be streaming this week and for several weeks) StarServer development (a new BW server). Feel free to have a look, and give tips and advice, as I'm a pretty noobie programmer. http://www.twitch.tv/birdietelevision

Sounds interesting. I'll follow you.

I'll also mention that there's someone streaming development of a new version of a game called Uniball (like the pen) that I used to and still occassionally play.

http://www.uniballhq.com/
http://www.twitch.tv/ubdev

sob3k

United States7572 Posts

November 07 2013 03:22 GMT

#7726

CSS/HTML peeps, have you used the checkbox hack to make events happen permanently onclick?

I have it working but I can't get it to trigger an onclick on itself.

Like:

I can make clicking on div1 make div2 change color

but i cant make clicking on div1 make div1 change color

how do you do this? Why won't it work? It it because the sibling conjugator isn't working on itself?

input[type=checkbox]:checked ~ .output {
background: red;

TiCHEN

Netherlands152 Posts

November 07 2013 18:39 GMT

#7727

Hi all,

i have a small question about javascript and html. This small part of my HTML code needs to be checked with javascript. What has to be done is that javascript needs to check if atleast 1 radio input is filled in and give an error in text, so no pop up.

I don't know how to do this. If any1 could tell me how, i would be very pleased. It is the last part of my assignment

This part with the radio which i need help on
+ Show Spoiler +

<fieldset id="inschrijving">
<div class="container">
<div class="floatLeft">
<label>22 april</label>
<br/>
<br/>
<input type="radio" name="size" value="Hele dag" />Hele dag </br>
<input type="radio" name="size" value="Ochtend" />Ochtend </br>
<input type="radio" name="size" value="Middag" />Middag </br>
<input type="checkbox" name="size3" value="I" />Inclusief lunch </br>
</div>
<div class="floatRight">
<label>23 april</label>
</br>
<br/>
<input type="radio" name="size1" value="Q" />Hele dag<br/>
<input type="radio" name="size1" value="W" />Ochtend<br/>
<input type="radio" name="size1" value="E" />Middag<br/>
<input type="checkbox" name="size2" value="R" />Inclusief lunch<br/>
</div>
</div>

This is my current javascript which includes some other stuff
+ Show Spoiler +

// <SCRIPT LANGUAGE="JavaScript">
// <script>
function validateForm()
{
var errorFound;

if (isEmpty("Naam"))
{
errorFound = true;
}

if (isEmpty("Adres"))
{
errorFound = true;
}

if (isEmpty("Postcode"))
{
errorFound = true;
}

if (isEmpty("Plaats"))
{
errorFound = true;
}

return (!errorFound)

}

function isEmpty(fieldName)
{
var x = document.forms["myForm"][fieldName].value;

if (x==null || x=="")
{
document.forms["myForm"][fieldName].className = "required";
document.getElementById(fieldName + "Verplicht").style.display = "inline";

return true;
}
else
{
document.forms["myForm"][fieldName].className = "";
document.getElementById(fieldName + "Verplicht").style.display = "none";

return false;
};
}

function myPostcode()
{
var x=document.getElementById("postcode").value;
document.getElementById("postcode").value=x.toUpperCase();
}
// </script>
// </SCRIPT>

This is my full HTML file
+ Show Spoiler +

<!DOCTYPE html>
<html>
<head>
<meta charset="iso-8859-1" />
<title>vereniging WIES</title>
<script src="file.js">
</script>
<link rel="stylesheet" type="text/css"
href="mainform.css" />
</head>
<body>
<div id="form">
<h3>Aanmelding WIES Congres</h3>

<form name="myForm" action="showform.php" onsubmit="return validateForm();" method="post">

<INPUT TYPE="hidden" NAME="to" VALUE="a" />
<p class="legend">Deelnemer</p>
<fieldset id="deelnemer">

<label>Naam</label><input type="text" name="Naam" size="30"/>
<label> Bedrijf </label><input type = "text" name = "Bedrijf" size = "30" /> </br>
<label>Adres</label><input type = "text" name = "Adres" size = "30" /><br/>
<label>Postcode</label><input type = "text" name = "Postcode" id="postcode" onblur="myPostcode();" size = "30" />
<label> Plaats</label><input type = "text" name = "Plaats" size = "30" /></br>

<label>Land</label>
<select name="land">
<option value="Nederland" selected="selected">Nederland</option>
<option value="Belgie">Belgie</option>
<option value="Duitsland">Duitsland</option>
<option value="Frankrijk">Frankrijk</option>
<option value="Luxemburg">Luxemburg</option>
</select>
<br/><br/>

<label>WIES ID</label><input type="radio" name="Ja" value="Ja" id="Ja" />Ja<input type="radio" name="Ja" value="Nee" id="Nee"/>Nee<br/>
<label class="lidnummer">Lidnummer</label><input type = "text" name = "getal1" maxlength = "6" size = "25" /><br/>
<label class="lidnummer">WIES pin</label><input type = "password" maxlength ="4" name = "getal2" size = "25" /><br/>

<div>
<span id="NaamVerplicht" class="Error">* Naam is verplicht.</span><br />
<span id="AdresVerplicht" class="Error">* Adres is verplicht.</span><br />
<span id="PostcodeVerplicht" class="Error">* Postcode is verplicht.</span><br />
<span id="PlaatsVerplicht" class="Error">* Plaats is verplicht.</span><br />
</div>

</fieldset>

<p class="legend">inschrijving</p>
<fieldset id="inschrijving">
<div class="container">
<div class="floatLeft">
<label>22 april</label>
<br/>
<br/>
<input type="radio" name="size" value="Hele dag" />Hele dag </br>
<input type="radio" name="size" value="Ochtend" />Ochtend </br>
<input type="radio" name="size" value="Middag" />Middag </br>
<input type="checkbox" name="size3" value="I" />Inclusief lunch </br>
</div>
<div class="floatRight">
<label>23 april</label>
</br>
<br/>
<input type="radio" name="size1" value="Q" />Hele dag<br/>
<input type="radio" name="size1" value="W" />Ochtend<br/>
<input type="radio" name="size1" value="E" />Middag<br/>
<input type="checkbox" name="size2" value="R" />Inclusief lunch<br/>
</div>
</div>
</br></br></br>

De kosten voor de hele dag zijn 150,--,
een enkele sessie: 90,--. <br/>
WIES leden 50% korting
De lunch kost 15,--
</fieldset>

<p class="legend">Enquete</p>
<fieldset id="Enquête">
<label>Functie</label><input type="radio" name="size6" value="H" />Manager <input type="radio" name="size6" value="H" />Informatieanalist
<input type="radio" name="size6" value="H" />Ontwikkelaar <input type="radio" name="size6" value="H" />Docent
<input type="radio" name="size6" value="H" />Overig
</br>
</br>
<label class="Vakgebied">Vakgebied </label>
<select name="beroep" id="beroep"
multiple="multiple" size="4">
<option value="automatisering" selected="selected">automatisering</option>
<option value="onderwijs">onderwijs</option>
<option value="overheid">overheid</option>
<option value="industrie">industrie</option>
<option value="handel">handel</option>
<option value="gezondheidszorg">gezondheidszorg</option>
<option value="banken
verzekeringen">banken
verzekeringen</option>
<option value="telecommunicatie">telecommunicatie</option>
<option value="Overig">Overig</option>
</select>
</br>
</br>

<label class="labelenquette">Bedrijfsgrootte</label>
<select name="personeel">
<option value="weining">0-10</option>
<option value="mkb">10-50</option>
<option value="mkbgroot">50-100</option>
<option value="zakelijk">100-500</option>
<option value="grootzakelijk">500 of meer</option>
</select>

</fieldset>
<p class="legend">Opmerkingen</p>
<fieldset id="Opmerkingen">
<TEXTAREA NAME="Opmerkingen" ROWS="5" COLS="40">

</TEXTAREA>
</fieldset>

<p id="buttons">
<input type="submit" value="Aanmelden" />
</p>
</form>
</div>
</body>
</html>

I had something like this:
if (!document.getElementById("radio button 1").checked && !document.getElementById("radio button 2").checked && !document.getElementById("radio button 3").checked && !document.getElementById("radio button 4").checked && !document.getElementById("radio button 5").checked &&!document.getElementById("radio button 6").checked )
{
errorFound=true;
}

I put this in my validateForm function. Im a big Javascript noobie so any help is appreciated.

VyingsP

France174 Posts

November 07 2013 19:43 GMT

#7728

On November 08 2013 03:39 TiCHEN wrote:
Hi all,

i have a small question about javascript and html. This small part of my HTML code needs to be checked with javascript. What has to be done is that javascript needs to check if atleast 1 radio input is filled in and give an error in text, so no pop up.

I don't know how to do this. If any1 could tell me how, i would be very pleased. It is the last part of my assignment

This part with the radio which i need help on
+ Show Spoiler +

This is my current javascript which includes some other stuff
+ Show Spoiler +

This is my full HTML file
+ Show Spoiler +

What exactly is your problem ? The answer Mindcrime gave you seems to be working...
http://jsfiddle.net/3n3Kx/

TiCHEN

Netherlands152 Posts

November 07 2013 20:24 GMT

#7729

Ah yes, i got it now. I had it misstyped in my if statement . i only had 1 & in one of my lines. Idk why, probably deleted it by accident.

I got this to work now. Now what I think i need to do, is make a new function in my javascript that will tell my html that it is not checked and my html can display some kind of error,
Something like this?: <span id="sizeVerplicht" class="Error">* day required</span><br />

like i did in my first paragraph :
<div>
<span id="NaamVerplicht" class="Error">* Naam is verplicht.</span><br />
<span id="AdresVerplicht" class="Error">* Adres is verplicht.</span><br />
<span id="PostcodeVerplicht" class="Error">* Postcode is verplicht.</span><br />
<span id="PlaatsVerplicht" class="Error">* Plaats is verplicht.</span><br />
</div>

The thing is, i made this with a isEmpty function, but i can't use that for my radio buttons can i? How exactly can i do this?

VyingsP

France174 Posts

November 07 2013 20:37 GMT

#7730

On November 07 2013 12:22 sob3k wrote:
CSS/HTML peeps, have you used the checkbox hack to make events happen permanently onclick?

I have it working but I can't get it to trigger an onclick on itself.

Like:

I can make clicking on div1 make div2 change color

but i cant make clicking on div1 make div1 change color

how do you do this? Why won't it work? It it because the sibling conjugator isn't working on itself?

input[type=checkbox]:checked ~ .output {
background: red;

Dunno if that's what you are looking for, or if you found by yourself already, but I think I got this working :
http://jsfiddle.net/as3nT/

But I'm pretty sure a div inside a label is not w3c compliant

enigmaticcam

United States280 Posts

November 07 2013 21:29 GMT

#7731

.NET networking question:

All that I'm about to describe happens within a LAN...

So I have a server with a windows service that I built. This service does work all day, specifically database work. What I would like to do is build a client service that will run on individual client machines. This client service will listen for events from the server service and alert the user to key events should they happen. These key events are user specific, meaning the server service can generate an event that might only apply to one specific user.

I typically approach things from a database perspective. From that perspective, it would be easy to have the server service generate events and save them in the database, and have the client services always checking the database and looking for user specific events. But I don't think that would be practical in this case. The database is already taxed during the day. It would be hard-pressed if I had a few hundred clients constantly running checks against the server.

I think a better solution would be to have the client services to connect and talk directly to the server service via peer-to-peer network connectivity. Perhaps the client machines can send a packet to the service saying "hey, I'm here" along with the user credentials every so often, and when the service has an event specific to the user, it will alert the client that has that user's credentials if the client has pinged within a certain threshold. If it fails, it's fine; it just means the user has logged off or shutdown the computer.

I'm just not entirely sure how to do direct peer-to-peer network connectivity in .NET. Anyone have any experience with this sort of thing? Perhaps can you point me in the right direction without giving a detailed solution if you don't want to?

supereddie

Netherlands151 Posts

November 07 2013 21:33 GMT

#7732

Check out WCF service with Callbacks. Might be overkill for a simple app though.

VyingsP

France174 Posts

November 07 2013 21:42 GMT

#7733

Maybe try something like the observer pattern ? When the client app starts, it contacts the server and registers to some events and whenever an event occurs, the server contacts the app back and notifies it ? Depends on your environment obviously.

ThatGuy

Canada695 Posts

November 07 2013 21:46 GMT

#7734

You could use the .NET Socket class to establish network connectivity and handle communication between the server and the client. You can read up on the Socket class and its usage here: http://msdn.microsoft.com/en-us/library/System.Net.Sockets.Socket(v=vs.110).aspx

As for how to approach this problem, I think a good place to start would be to have the server have a listening loop available (check Socket.Listen), awaiting incoming connections from clients. When a new client asks to connect, the server receives the request and saves it locally to a client list. Conversely, the server removes the client from its list when it detects that a connection has been terminated (plenty of exception handling you'll have to watch out for). When it has something it needs to communicate to the clients, it iterates through the list of clients, broadcasting its message.

Client side, it sits there waiting for signals from the server (like the listen loop), and does whatever you want it to

.

You may want to look into multithreading this application (especially the server), to prevent your applications from stalling while it listens for information.

enigmaticcam

United States280 Posts

November 07 2013 22:00 GMT

#7735

I've known of the Socket class, but never dabbled into it since most of the work I do is database driven. That might be the solution I'm looking for; I'll do some googling and see if I can find some basic examples using it.

For some reason, I always thought the WCF was for web services. Either way, I'll check that out too.

I wasn't expecting answers so quickly! Thanks for your help.

Zocat

Germany2229 Posts

November 07 2013 22:26 GMT

#7736

WCF - MSMQ
Overall you're looking for the publish/subscribe or message queuing patterns.
Those should be able to deliver the messages even if the client went offline (as soon as he goes on he can consume it).

If you just want to broadcast to active clients, I'd say sockets & keeping a userlist (with various flags for the type of message they should receive). If you dont care about security you can perform the "is the message for me" check on the client.

misirlou

Portugal3241 Posts

November 07 2013 23:56 GMT

#7737

MSMQ only really needed if you want the messages to be delivered offline. I think using WCF with callbacks (wsdualhttpbinding if I recall?) is the most appropriate option, it implements the observer pattern. Sockets are also easy to use, but they aren't really web services.

sob3k

United States7572 Posts

November 08 2013 07:20 GMT

#7738

On November 08 2013 05:37 VyingsP wrote:

Show nested quote +

Thanks a ton, looks great to me!

PandaCore

Germany553 Posts

November 08 2013 14:40 GMT

#7739

This is pretty much a long shot, but I'm kind of stuck right now. I haven't been in web development for 7 years and I'm a bit out of touch concerning new technologies in that area.

Hopefully someone can point me in a direction where I can read up on a bit more.

I need to develop a rich internet application, where a user can customize their own UI. It starts as an empty page and then you can add elements for visualization (i.e. gauges, line graphs, bar graphs, etc.) and position them freely on the main window.

These visual elements receive data from a remote server and have to be able to display those within milliseconds. This is very important. Also this should just run on most of the modern browser without the need of any additional plugins. Using Flash is out of question as well, even though it seems quite good for that kind of application.

That's the very basic description. HTML5+jQuery looks nice for just visualizing data, but I'm not too sure on the actual aspect of being able to customize the appearance freely in a browser environment (i.e. being able to get context menus, adding new elements, opening configuration windows for the elements etc.).

I come from a background of desktop application development, so I probably need to rethink how to let the user interact and work with things in a browser environment as well.

Deleted User 101379

4849 Posts

November 08 2013 17:52 GMT

#7740

On November 08 2013 23:40 PandaCore wrote:This is pretty much a long shot, but I'm kind of stuck right now. I haven't been in web development for 7 years and I'm a bit out of touch concerning new technologies in that area.

Hopefully someone can point me in a direction where I can read up on a bit more.

I need to develop a rich internet application, where a user can customize their own UI. It starts as an empty page and then you can add elements for visualization (i.e. gauges, line graphs, bar graphs, etc.) and position them freely on the main window.

These visual elements receive data from a remote server and have to be able to display those within milliseconds. This is very important. Also this should just run on most of the modern browser without the need of any additional plugins. Using Flash is out of question as well, even though it seems quite good for that kind of application.

That's the very basic description. HTML5+jQuery looks nice for just visualizing data, but I'm not too sure on the actual aspect of being able to customize the appearance freely in a browser environment (i.e. being able to get context menus, adding new elements, opening configuration windows for the elements etc.).

I come from a background of desktop application development, so I probably need to rethink how to let the user interact and work with things in a browser environment as well.

You actually don't, these days. If you want to do the displaying part yourself, familiarize yourself with the HTML5 Canvas, which is basically a 2D graphics environment that you can manipulate just like in a normal desktop environment.

Depending on wether you want to have your data transfer active or passive (polling), you can either go websockets (active) which work similar to TCP as a persistent 2-way connection or you simply use AJAX to regularly request new data (passive) and then update the canvas elements belonging to it.

There are also some libraries, jquery and otherwise, that already deal with making graphs out of things. A quick google offers 5 libraries that should do the job. About 2 years ago i worked with jqPlot for a similar use-case and it was easy enough to use, though other libraries might be better suited for your specific use-case.

You can treat it just like a desktop environment with it's own scripting language and network protocol, no real need to concern yourself too much with HTTP other than as a proxy between the browser and the database. Just think about how you would do it in a desktop application and do it just the same way except in javascript.

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