Device Info the Iron Man way

Your Android phone is an incredible piece of technology. It has the ability to not only make phone calls but you can also take pictures and videos, play 3D accelerated games, find your location using the GPS satellite system, you have a gyroscope, compass, accelerator and much much more.

All of this hardware comes in nearly unlimited variations put together into a singular, unique device. The Samsung S5 and a Pixel XL smartphones for example both have the same types of hardware available but have vastly different hardware chips for those tasks.

If you want to know your phone, you have to know your phones innards and software versions. There are plenty of device info apps on the app store. However there is one app in particular which makes it fun and exciting to look up all of these pieces of information.

CPU Information

This app has a Virtual Reality inspired interface to view your device information. The interface can be adjust the color scheme and a few other details which makes this a great app to go together with your devices protective cover.

The dashboard graphics are stunningly beautiful and playful. Aside from the center control which acts as a menu you can also see the polar clock on the top left corner. The sound effects are very well done and play seamlessly with the animation.

CPU Information is under active development and new widgets will come on a constant basis. If you install it today you will be able to see the progress over time and take full advantage of all new widgets and features before you have to pay for them.

So to sum it all up, if there is one app you want to use to view your devices information, it is this app. CPU Information offers all the information plus one of the most unique interfaces on the app-store.

Intro Video

You can take a quick peek at the application in action in this short demo video below. But please note that the app may hav added new features by the time you view this video.



Get it on the Play store now.

Get it on Google Play

CPU Information

I have spent the past few weeks improving major parts of this app and I am finally at the point of releasing the new and shiny interface.

My ultimate goal for this app is to pull in all of the views into 3D and outshine other similar apps in beauty and create the best app for the job ( as usual ). This is a new beginning for the app and I will likely spend the next few months improving it.

HUD

I love iron Man like HUD interfaces. As such I am building a library with multiple interfaces for different visualization purposes. The interface above is a switch-board with a connected gyroscope and the Earth centered in it.

After the initial release I want to create a terminal emulation which I can scale at will in 3D space, followed by an audio interface which coverts input from the microphone into a nice 3D visual.

There are many more possibilities and I am having fun creating these playful widgets.

Shader

Another area which I want to invest some time in is to work with some custom shaders to bring out some glowing special effects and other goodies.

OpenGL ES 2.0 is a strange beast and not necessarily the easiest environment to learn but it offers some great flexibility in what you can accomplish. The ES, which stands for Embedded Systems, introduces a few changes as compared to the desktop OpenGL implementation.

OpenGL ES 2.0 Programming guide
OpenGL ES 2.0 Programming guide

I am currently going through the “OpenGL ES 2.0 programming guide”, which is a real good book to learn OpenGL. It will help me to realize the remaining widgets and animations to convert the complete app into the 3D realm.

Please give it a try and let me know what you think of it. Also I would love to hear if you have any ideas for a widget which I could implement.

Get it on Google Play

Android Storage Wars

If you have ever tried your hand on coding for Android you certainly have found google’s JAVA based API to be somewhat of a incoherent mess in certain areas, which over time has evolved into an even larger incoherent mess in even more areas.

One of those messy areas is that of the android secondary storage API. All phones have a primary storage area, where you can store images, videos, apps, and application data, and some phones come with a secondary storage option. The API to gain access to the primary storage has evolved over time but allows you to seamlessly integrate proper functionality into your app.


Now you may assume that the Android secondary storage would follow the same paradigm, and grant the same access as the primary storage to your app. However you would be wrong making this assumption. The reason you have apps like the “ES File Manager” handling this for you seamlessly is purely through tricky code in the background which circumvent googles protective scheme for secondary storage, Aka a hack.

Dont do evil … yeah right!


Yes, google in its drive to push people into using their cloud storage is actively pressuring phone makers to get rid of that large secondary storage, or worse the micro-SD slot. That overarching goal of google is driving the API and the access rights to the Androids secondary storage media in a negative way.

Let’s start with a small bit of terminology. Since the dawn of Android, nearly every type of storage has been considered “external storage” even the non-removable flash memory that comes in every device. To distinguish, the non-removable flash memory is called “primary storage”<, while a removable micro SD card is called “secondary storage”. In the early Android versions, an app merely needed permission to WRITE_EXTERNAL_STORAGE to be able to fully access both primary and secondary storage.

In March, 2011, a drastic change to Android was made which changed how secondary storage mediums (external SD cards) were mounted by the Android OS. Specifically, the commit read like this: “Mount secondary external storage writable by AID_MEDIA_RW rather than AID_SDCARD_RW.” This meant that the media would now have to belong to the “media_rw” group to modify the contents of the SD card. As a result, a new permission, called WRITE_MEDIA_STORAGE, was added to the source code. Basically, WRITE_MEDIA_STORAGE replaced the original WRITE_EXTERNAL_STORAGE.

This change has a devastating effect on apps trying to utilize secondary storage because from now on forward only system apps could request the permission to read/write to the external storage ( I.e. sdcard ).

Android secondary storage

Since the WRITE_EXTERNAL_STORAGE permission could be used by any normal app and thus any app can write to the primary storage but not to the secondary storage (external micro SD cards). The WRITE_MEDIA_STORAGE permission could write to the external micro SD card, but regular user apps could not request the permission. This change took place on Android 3.2 Honeycomb, but due to the logistics of hardware and storage mediums at that time, it was barely noticed.

Quote: “Starting around the time of Android 4.4 4 KitKat, and even a little earlier, the implementation of the userspace FUSE filesystem, in conjunction with changes to the open source code, resolved this problem. Yet, still to today, even with Android 8.x.x Oreo, third party apps must explicitly get the user’s permission for both primary and secondary storage before the app can alter either storage medium in any way. And of course, the newer concepts of adoptable storage have alleviated problems in this regard.” — end quote.

Bottom line

Thanks to google the way that most apps now handle android secondary storage heavily depends on the Android version being used. Unfortunately at this time most phones will have a hard time working with the secondary storage, but some phones do. I have updated the file browser integration into my apps and have fixed the issue of secondary storage on some Android versions and not on others.

This whole debacle has not only cost me weeks of effort and research, it has negatively affected all apps with file system access and is the main reason that almost all apps only storing their data on the primary storage, which in most cases is much smaller than the external storage. At this tmie you can get a cheap microSD card with up to 512 GB. However what good is this in your phone if most apps can only use the built-in 16GB ?

Can the Google Play Store Stats be trusted

The Play Store Stats contain important metrics about your apps in the Google Play Store. Any app developer has noticed by now ( August 2018 ) that Google is changing the stats displayed in the developer console and in the app store.

One of the largest changes has been the removal of the “Total Installs” from the play store stats in the developer console. A move which is causing a lot of trouble to me because I relied on it for my growth goals. Google’s reasoning behind this is that it wants quality apps and as such the number of active installs is what Google wants developers to focus on.

I used to look at both numbers together and determine what the rate of adoption was ( E.g. 22% of people installing my app would retain it ). Now however I have to gobble these numbers together through a few more mouse clicks. By choosing “Number Of Installs” for the period “Lifetime” of the app.

Google Play Console Total Downloads

Another unfortunate change that I have just noticed is the elimination of the displayed download tiers in the Play Store. I have a fairly new app n the app store which has just crossed the 5k download mark. The Play store used to honor this by displaying Installs 5000+. However, as of today, with a total install of 5,535 I do see this in the Play Store:
Google Play Store Total Installs

I also noticed that frequently the displayed metrics are distorted after Google changes ( Aka tweaks ) the formula behind the metric. For example the number of active devices would unexpectedly drop from one day to another by a few hundred. However at the same time, the play store stats showed a positive difference between installed and uninstalled apps.

The number of active devices is “Number of Android devices that have been active in the previous 30 days that your app is installed on.”. If that’s the case and Google’s number would be accurate it would mean a hell of a coincidence that a few hundred users of my app stopped using their phone at the same day.

Stats Madness at Google

I wonder how many more changes there will be in the future for app developer. After all if I can not rely on the metric displayed in the app store stats, what are the chances that the numbers in Google Ads are accurate ? I guess there is really no way to tell.

Below is the link to Reverse Video Magic. Can you see how many installs ?
Get it on Google Play

Revert Video Magic Video Android-app

After returning from vacation this year I wanted to edit and send some videos to my family which should highlight some of the more outstanding experiences in a funny but interesting way. The Revert Video Magic app for Android on the google play store was exactly what was needed for this job.

I was looking to take a piece of a video, and revert parts of it and then replace this part with a sequence of forward, backward, forward action all abound. Here is the resulting video to better explain the effect I was after.



I looked around but could only find one app on the google play market which would offer me this functionality. Revert Video Magic for Android

The below images are screenshots of the main screens for Revert Video Magic for Android

The Main Screen is where you select the source video from, that is you can either browse through the media library of your phone or you open a File Browser which allows you to browse the file system of your phone. You can even use your video camera and shoot the video from within the app.

Revert Video Magic Main Screen
Main Screen
Revert Video magic settings screen
Revert Video Settings screen
Revert Video Magic Share Screen
Share Screen

Once you have selected the source video you would like to use, you arrive at the settings page. The Revert Video Magic Settings page allows you to modify the resulting video resolution, the speed of the reverted part, as well as cutting the start and end points of the target video.

Once these settings are set, you will see the Post Processing screen of the revert Video Magic app. This page allows you to actually replace the selected part in-place of where the original video part was. None of the other revert video apps on the google play store do allow for this to happen.

Using the -SHARE- button on the top right corner of the Share screen will then allow you to finally send the video to your friends or share it on social media like YouTube, FaceBook etc.

This app is focused on doing one thing but doing it right. The built in video player, Camera functionality, File Browser, and Share functionality are all part of making reversing part of your video as much fun as the final video.

Feel free to download the app for free from the link below.

Get it on Google Play

What martial arts has taught me about leadership

As a leader and manager of people you are at times confronted with tough choices and when the pressure rises and things start to get heated, I like to lean back and reflect at my younger years.

During my late teens and all the way into my thirties I have been a student of martial arts. I have spent countless hours in Dojos all around the globe and I have enjoyed it to the point of obsessing over it.

Shotokan Karate Kata bunkai
Shotokan Karate Kata bunkai, Nijushiho

My base has been traditional Shotokan Karate but I loved straying off course and discovering other martial arts such as JuJitsu, Judo, Aikido, Aikibudo, Shinjitsu, Kempo, and more.

I could go on about my glory days and the benefits of practicing these arts and the physical strengths you will gain if you are practicing between four and seven times a week. However this article is not the about physical strength but about mental strength.

Kihon

Karate requires practice, and it requires a lot of it. This is due to learning the proper coordination of movements to end in a single focused blow to your opponents body.

You start out to learn your basic moves. At first, they will look and feel odd. You have to use your mind to force your body to follow the moves. Then, as you move up in the ranks, you learn to internalize these moves and as they become more natural to your body, you start to learn how to apply those moves in combination with other moves.

kihon, the basics
kihon, the basics

Oi zuki, mae geri, gyaku zuki, or in tongue-in-cheek-English “Punch, kick, other-punch”, is a basic combination you learn early on. It will take about three to four training sessions to get used to this particular combination, and it will take you between five and ten years to master it. Really, I mean it, it will take that long to learn this basic combination to the point where you can apply it as a matter of reflex rather than -Think- about applying it.

Here is where this will help you with your leadership development.

As a leader you too have to learn basic moves in order to learn and grow in your field. You usually start at level one, which John Maxwell calls the positional leader. At this level you have become a manager of sorts over a team of people. At this point you will have to learn to Earn Trust.
At first this will feel odd. You have to Think about every decision and every meeting you have with your team. Then, as you grow your trust in your team, you learn to internalize these lessons and as they become more natural to your mind, you start to learn how to get to level 2, which is the permission level.

The Oddness of leadership
The Oddness of leadership

Kata

From Wikipedia: “Traditionally, kata are taught in stages. Kata is often described as a set sequence of karate moves organised into a pre-arranged fight against imaginary opponents. The kata consists of kicks, punches, sweeps, strikes and blocks. Body movement in various kata includes stepping, twisting, turning, dropping to the ground, and jumping.”

Shotokan Kata
Shotokan Kata

While this will seem strange at first you will eventually come to realize that performing a Kata with the right emphasis and the right mindset will help you improve your techniques, your strength, your form, and your timing.

Once you have a fair grip on the basics ( kihon ) as a leader, you need to learn to combine a whole range of different qualities and environments in order to achieve the best results with and for your team. You have to study different approaches to solve certain situations to be able to pull them out when you have to. You have to be able to set and monitor goals, give feedback, encourage, request, teach, be empathetic or strong. You have to add as many tools to your repertoire as you can, and as a leader you have to be willing and able to use those tools.

In most cases you will be able to select your management style. From tough love, to lending a shoulder to cry on. There have been plenty of studies which seem to show that there is no one-size-fits-all approaches to management. However in Leadership you have to have certain characteristics which will help you achieve level two with your team members. You have to have a mindset of servanthood. You grow yourself and your team. You are very good at observing and listening.

At level two, the permission level, people will follow you because they want to. Your team trusts your decisions and they trust that you have their back. It is where you build relationships with your team, they like you and you like them. In return, they do work hard to keep their commitments to you and your company.

Now at this level, results starting to appear.

One of my Sensei in Kata Bunkai – action

Kumite

Kumite is the practical application of kihon and kata. It is, in essence, a formalized fight following stringent rules. These rules are in place to allow the student to learn and practice a combat situation without the fear of a broken nose or other bodily harm. Kumite is what most people think of as a martial arts competition and is as close to combat as traditional Karate will get you.

You will not only learn to apply your techniques but you will also learn to be relaxed, concentrated, anticipate when an attack will happen and improve your reflexes. One important lesson I have taken home from practicing kumite was to always move forward, never move back. The best benefit of kumite however is that of friendship.

If you as a leader are at level three, the production level, you will lead by example. You work hard and you start to help the bottom line of the company. You start to build positive, reinforcing momentum and that momentum will help you break through the largest obstacles.
If you can get yourself and your team to this level, you will soon learn to be relaxed in a stressful environment, concentrate and focus on finding the required solution for the business, and anticipate when an you will have to make a change to the team, the project, or the goals before they become a real issues.

Kumite
Kumite

At this point you will always move forward. The only time you can lose is when you give up on something. You cannot be defeated for as long as you learn and grow and try again. And that folks is true in all parts of life.

Bushido

Karate, which stands for empty-hand, the karate-do, or the way of karate is given great emphasis. It is where the bushido, or the way of the warrior, makes its mark on Karate and lets us reflect on the roots of the art we are students of. This is in contrast to sports like UFC, or modern self defense styles which may or may not borrow from the traditional martial arts. In the self-defense sports, the goal is to enable the trainee to defend himself in certain situations.

My personal motivation to training martial arts has always been to seek control over mind and body, as well as staying in good shape. I was never under the illusion to defend with a single kick against a knife or a semi automatic. I have had the pleasure of training kids, and lower ranks in those days and it was one of the most rewarding activities I have ever experienced.

karate - do
karate – do

After all, in nature, we are bound to grow up, Learn from others, Apply the lessons learned, and then pass the information on to The next generation. Do as I do, not as I say has become one of my rules. In order to get there though I had to become the best I could be and I had to remain in that shape for as long as I wanted to teach.

Leaders as well should always strive to follow learn from others, apply those lessons, and then pass them on to your team.

“Leadership is a journey and not a destination”

The wise Sensei

For me, those days have long since passed and I know that the younger-me could pick me apart in an instance. However the ‘do’ ( the way ) has remained with me ever since. I am working hard, I am humble in working with and for my team. As a leader, I am forward looking and I have the back of every single individual in my team.

I try to lead by example and teach and grow my team. As a leader you should strive to be the Samurai and not the Ninja. Be committed to your team and your company, learn, read, study your whole life and most importantly practice what you preach.

John Maxwell – 5 levels of leadership
http://www.youtube.com/watch?v=aPwXeg8ThWI

Crypto Portfolio app

Keeping track of your overall Crypto Portfolio is not as straight forward as it should be. Investing into crypto currencies can leave you with multiple wallets and online resources. Each one may contain different coins and tokens for different purposes.

It is highly recommended to store all ( or as much as possible ) offline, detached from the internet. This way hackers won’t be able to get their fingers on your hard earned Bitcoins, Ethereum, etc.

I have started to look into Crypto currencies in early 2018 and I see great potential in the basic ideas behind the technologies. While my timing was especially bad I wanted to know what the fuzz was all about. The best way to understand things though is to start playing with them. So I did spend some time and money learning a new technology.

Shut up and take my money

Shut-up-and-take-my-money
Shut-up-and-take-my-money

You need to sign up with and exchange when you want to buy some coins or tokens in order to convert your dollars into a crypto-currency. With Coinbase being one of one most popular which people would recommend for n00bs.

Coinbase allows you to convert to deposit funds using your credit card or your bank account information. Paypal is no longer supported. You can then exchange your fiat currency ( I.e. Dollars, Euros etc. ) into Bitcoin, Bitcoin Cash, Etherium, or Litecoin. Any other crypto currency requires you to sign up with another exchange of which there are many to choose from.

Coinmarketcap.com, and coincap.io provide you the information as to which exchange supports the crypto token you are interested in.

Binance is one of those larger exchanges which has received good online reviews and has supposedly the lowest transaction fees.

Getting your hands on some crypto coins or tokens also requires you to safely store them somewhere. Here we have probably one of the weakest points in this area. Every crypto-currency has their own way of storing the tokens. You can keep them on your computer, in an online wallet, in offline wallets or as a paper wallet. You will quickly arrive at a point where you can lose track of your virtual wealth ( or as we have seen recently, the decline thereof ).

Crypto Portfolio

So I wrote a Crypto Portfolio app which will allow you to enter your token amount and then look at the market data for it. I will not store this information on the server but instead store it in your browsers’ cache so you don’t have to fear releasing any data to my servers.

One thing I quickly realized is that almost everything you do in crypto will cost you either a fee or a transaction cost.

Binance fees

So yeah Binance has a 0.1% trading fee however one thing which you will not see right away is that you will not be able to convert all of one crypto token into another crypto token.

Binance will always leave you with some leftover on their platform. These may vary but my worst case leftover position is worth about US$1.00.

On top of that Binance also requires a minimum transaction for certain coins. E.g. you require at least US$97.181- ( as of Feb 2 2018 ) in Etherium before you can transfer it out of Binance.

Then you have to pay for the actual transaction fees which for Etherium ar 0.01ETH, which is … well about $9.71 as of this date.

Since Binance does not display this information in a useful way I went ahead and added this into a table in my little app which you can sort to gather some more information on trading conditions of a certain coin. [ Menu -> Utils -> Binance Fees ]

So you add this all up and you end up spending a lot of money in the whole exchange process.

If you exchange E.g. $100,- by the time it leaves Coinbase you are down to about $97,- Then you exchange it for ETH on Binance and send it back to your private wallet, you end up with only about $85,- worth of ETH.

This of course does not take into account the huge market swings, which could increase or decrease your position a few percentage points in the time it takes to go through the whole operation.

To sum it all up

First though I have to remind you that; yes it is possible to lose money, which is why you should never put in more than you can afford to lose.

This app is in its early stages and I will certainly add more features as time permits. Please feel free to check it out here …

Please leave me some feedback for enhancements if you find it useful. Or follow the link below to the source code, make changes yourself, and then send them to me for integration 🙂

Resources

Graphing library used : NVD3 Re-usable charts for d3.js

If you click on the image below you can start using the app online from within my WebOS.
You can find it under [Start -> Utils -> Crypto ]. Note: This app does not send any data back to any server.

Feel you want to play with the code: follow the link to the Battlefield.

Nine weird things to code

So the weekend is here and you are sitting in front of your computer and don’t know what to do.
You are still bored after watching YouTube videos all day.

Don’t Worry, you have come to the right place. I will show you how to display funny text,
add a spinning 3D globe to your web page, build a calculator for your math homework or in case you work requires you to calculate the remaing fuel contents on your rocket entring an orbit around Mars. and more …

Here are 9 things you can code when you are bored.

Hello World

This “Hello World” jumps out and is a real attention seeking device. Your eyes are automatically caught paying more attention to it. If you want to drive people into madness you can display your whole page using this quirk.
You will certainly be rewarded with a firestorm of complaints.

<html>
<head><title>bored_1</title></head>
<body>

<p></p>&nbsp;<p></p>
<center><b><div id="OUT"></div></b></center>
<script>
  var div = document.getElementById ( "OUT" );
  div.innerHTML = "Hello World";
  
  function randomClr ( char )  {
    var r = parseInt ( Math.random ( ) * 255, 10 );
    var g = parseInt ( Math.random ( ) * 255, 10 );
    var b = parseInt ( Math.random ( ) * 255, 10 );
    var ret = "<font color='rgb(" + r + "," + g + "," + b + ");'>" + char + "</font>";
    return ret;
  }
  function randomType ( char )  {
    var ret=char, r = parseInt ( Math.random ( ) * 4, 10 );
    switch ( r )  {
      case 0: ret = "<b>" + char + "</b>"; break;
      case 1: ret = "<i>" + char + "</i>"; break;
      case 2: ret = "<sup>" + char + "</sup>"; break;
      case 3: ret = "<sub>" + char + "</sub>"; break;
    }
    return ret;
  }
  setInterval ( function ( ) {  
    var html="", text = "Hello World";
    for ( var t=0; t<text.length; t++ )  {
      var clr = randomClr ( text[t] );
      html += randomType ( clr );
    }
    div.innerHTML = "<h1>" + html + "</h1>";
  }, 500 );
</script>
</body>
</html>

Random Password generator

This generator will allow you to create your very own randomly generated password string.

<html>
<head><title>bored_2</title></head>
<body>
<p></p>&nbsp;<p></p>
<center><b><div id="OUT"></div></b></center>
  <script>
    var div = document.getElementById ( "OUT" );
    var randomString = function(length) {
      var text = "";
      var possible = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789";
      for(var i = 0; i < length; i++) {
          text += possible.charAt(Math.floor(Math.random() * possible.length));
      }
      return text;
    }
    div.innerHTML = randomString ( 20 );
  </script>
</body>
</html>

I got some interesting feedback wrt this generator and decided to provide another version which will use the crypto API
inside the browsers instead of Math.random ( );

<!DOCTYPE html>
<html>
<head><title>bored_2</title></head>
<body>

<p></p>&nbsp;<p></p>
<center><b><div id="OUT"></div></b></center>
  <script>
    var div = document.getElementById ( "OUT" );
    var randomString = function(length) {
      var text = "";
      var possible = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789";
      var cryp = new  Uint8Array ( possible.length );
      var rand = getRandomValues ( cryp );

      for ( var i = 0; i < length; i++ )  {
          text += possible.charAt ( rand[i] % possible.length );
      }
      return text;
    }
    getRandomValues = function  ( buf ) {
      if (!(buf instanceof Uint8Array)) {
        throw new Error('Invalid type: buf not an Uint8Array');
      }
      if (typeof window !== 'undefined' && window.crypto && window.crypto.getRandomValues) {
        window.crypto.getRandomValues(buf);
      } else if (typeof window !== 'undefined' && typeof window.msCrypto === 'object' && typeof window.msCrypto.getRandomValues === 'function') {
        window.msCrypto.getRandomValues(buf);
      } else if (nodeCrypto) {
        var bytes = nodeCrypto.randomBytes(buf.length);
        buf.set(bytes);
      } else if (this.randomBuffer.buffer) {
        this.randomBuffer.get(buf);
      } else {
        throw new Error('No secure random number generator available.');
      }
      return buf;
    }
    div.innerHTML = randomString ( 20 );
  </script>
</body>
</html>

Santas trip

Want to move Santa across your web page to celebrate the season or have a selfie take a trip over your web page …
Here is a fun snippet to achieve that.

<!DOCTYPE html>
<html>
<head><title>bored_3</title></head>
<body bgcolor="black">
  <img src="flying.gif" id="sleigh" style="position: absolute" />
  <audio src="bells.mp3" autoplay loop></audio>
<script>
  var img = document.getElementById ( "sleigh" );
  var left = 0;
  setInterval ( function ( ) {
    left += 3;
    img.style.left = left+"px";
    if ( left > window.innerWidth )
         left = -400;
  }, 100 );
</script>
</body>
</html>

Calculator

Still don’t know what to do ?
Have you ever wondered what your monthly mortgage rate would be like if you change the interest rate or the length of the loan ?
Or are you looking for a simple tip calculator. This snippet is using evil-eval to accomplish this task.

<!DOCTYPE html>
<html>
<head><title>bored_4</title>
    <script>
      function calc ( )  {
        var out = document.getElementById ( "OUT" );
        var txt = document.getElementById ( "eq" );
        var res = eval ( txt.value );
        out.innerHTML = res+"";
      }
    </script>
</head>
<body>
  <form>
    <input type="text" id="eq" value='var r=5.00, N=12*15, P=100000; var R=r/12/100; var M=R/(1-(1+R) ** -N ) * P; P+"@"+r+"% = "+M' size="70" \>
    <input type="button" value="Calculate" onclick="calc();" \>
  </form>
<p><b><div id="OUT"> -- VALUE --</div></b>
</body>
</html>

Polar Clock

Want to know what tmie it is but you wnat to realy try to use as much brain power as possible
Try the Polar Clock. A fun way to display time.

<html>
<head>
    <title>bored_5</title>
    <script src="clock.js"> </script>
</head>
<body bgcolor="white">
<div id="logo" >
  <canvas id="canvas" width="120" height="120" ></canvas>
</div>
</body>
</html>

Random Image

Do you want to use a random background image from Flicker.
This code snippet does just that using the flickr API.

<html>
<head><title>bored_6</title>
<style>    
body {
  background-size: contain;
  background-repeat: no-repeat;
  background-position: center center;
}
</style>
  <script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.3/jquery.min.js"></script>
  <script type="text/javascript">
    var keyword = "mountains";
    function getImg ( )  {
      keyword = document.getElementById ( "key" ).value;
      var req = { tags: keyword, tagmode: "any", format: "json" };
      var url = "https://api.flickr.com/services/feeds/photos_public.gne?jsoncallback=?"; 
      $.getJSON ( url, req, function ( data )  {
        var rnd = Math.floor(Math.random() * data.items.length);
        var image_src = data.items[rnd]['media']['m'].replace("_m", "_b");
        $('body').css('background-image', "url('" + image_src + "')");
      } );
    }
    $(document).ready(function(){
      getImg ( );
    });
  </script>
</head>
<body>
  <button onclick="getImg ( );">New Image</button>
  <input type="text" value="mountain" id="key"/>
</body>
</html>

Chess Game

Granted this one is a bit too much to invent yourself. But fear not, you can get the tiny 1k code for a chess game from Here …

<!doctype html>
<html>
  <!--
  (c) &copy; js1k.com, 2010 - 2017
  Note: submissions belong to their respectful owner, do not copy without their consent
  -->
  <head>
    <title>JS1k 2010 - Demo 750 </title>
    <meta charset="utf-8">
    <meta name="author" content="Óscar Toledo G.">
    <meta name="description" content="JS1k 2010 demo: Tiny Chess.">
    <meta name="pubdate" content="20100909">
    <link rel="icon" type="image/png" href="http://js1k.com/favicon.png">
    <link rel="canonical" href="http://js1k.com/2010-first/demo/750">
    <link rel="alternate" type="application/rss+xml" title="New demo feed" href="http://js1k.com/feed.xml">
    <link rel="shortlink" href="http://js1k.com/750">
    <script>
      setTimeout(function(){
        var ga = document.createElement('script');
        ga.async = true;
        ga.defer = true;
        ga.src = 'http://www.google-analytics.com/ga.js';
        ga.onload = function(){try{_gat._getTracker('UA-19882353-1')._trackPageview();}catch(e){window.console&&console.log("ga fail :'( ");};};
        var s = document.getElementsByTagName('script')[0];
        s.parentNode.insertBefore(ga, s);
      }, 10);
    </script>
    <style>
      /* http://qfox.nl/notes/333 */
      body,html,iframe{margin:0;padding:0;border:0;width:100%;height:100%}
      iframe{position:absolute;top:0;left:0;padding-top:50px;box-sizing:border-box}
      header{position:relative;z-index:1;height:47px;padding-top:2px;border-bottom:1px solid #000;box-shadow:0 -10px 25px #ccc inset;background-color:#eee}
      aside,div,h1,p{overflow:hidden;white-space:nowrap;text-overflow:ellipsis;text-align:center;font-size:16px;font-weight:inherit;line-height:22px;padding:0;margin:0;cursor:default}
      aside,h1{display:inline}
      a{color:#000;text-decoration:none;border-bottom:1px dashed #000}
      a:hover{border-bottom:1px solid red}
      a[href="0"]{text-decoration:line-through;pointer-events:none;border-bottom:0;color:#ccc}
      .button{float:left;width:40px;height:40px;line-height:40px;text-align:center;padding:0;margin:2px 0 0 10px;border:1px solid #888;border-color:#ddd #888 #888 #ddd;font-family:sans-serif;font-size:30px;font-weight:700;cursor:pointer}
      .button:hover{color:red;border-bottom-color:#888}
      .r{margin-right:10px}
      time{display:none}
    </style>

  </head>
  <body>
    <header>
      <div>
        <h1>
          <a href="http://js1k.com">JS1k</a>
          <a href="http://js1k.com/2010-first">2010</a>
          <strong></strong> demo
          &mdash;
           by Óscar Toledo G.
        </h1>
        <p>
          <em>
            Tiny Chess.
          </em>
        </p>
        <aside>
          &mdash;
          1023 bytes
          &mdash;
          <!-- -->
          <a href="http://js1k.com/2010-first/details/750">demo details</a>
          &mdash;
          <a href="http://js1k.com/2010-first/demos">list of demos</a>
          <!-- 
          <b><a href="http://js1k.com/2010-first/demo/">
            Update available here!
          </a></b>
          <!-- -->
          &mdash;
          <a href="http://js1k.com/750" title="short link for your mobile devices" rel="nofollow">js1k.com/750</a>
        </aside>
      </div>

      <a href="749" class="button p">&Larr;</a>
      <a href="751" class="button n">&Rarr;</a>
    </header>

    <script type="demo">
for(B=i=y=u=b=i=5-5,x=10,I=[],l=[];B++<304;I[B-1]=B%x?B/x%x<2|B%x<2?7:B/x&4?0:l[i++]="ECDFBDCEAAAAAAAAIIIIIIIIMKLNJLKM@G@TSb~?A6J57IKJT576,+-48HLSUmgukgg OJNMLK  IDHGFE".charCodeAt(y++)-64:7);function X(c,h,e,s){c^=8;for(var o,S,C,A,R,T,G,d=e&&X(c,0)>1e4,n,N=-1e8,O=20,K=78-h<<9;++O<99;)if((o=I[T=O])&&(G=o^c)<7){A=G--&2?8:4;C=o-9?l[61+G]:49;do if(!(R=I[T+=l[C]])&&!!G|A<3||(R+1^c)>9&&G|A>2){if(!(R-2&7))return K;n=G|(c?T>29:T<91)?o:6^c;S=(R&&l[R&7|32]*2-h-G)+(n-o?110:!G&&(A<2)+1);if(e>h||1<e&e==h&&S>2|d){I[T]=n;I[O]=0;S-=X(c,h+1,e,S-N);if(!(h||e-1|B-O|T-b|S<-1e4))return W(),c&&setTimeout("X(8,0,2),X(8,0,1)",75);I[O]=o;I[T]=R}if(S>N||!h&S==N&&Math.random()<.5)if(N=S,e>1)if(h?s-S<0:(B=O,b=T,0))break}while(!R&G>2||(T=O,(G||A>2|(c?O>78:O<41)&!R)&&++C*--A))}return-K+768<N|d&&N}function W(){i="<table>";for(u=18;u<99;document.body.innerHTML=i+=++u%x-9?"<th width=60 height=60 onclick='I[b="+u+"]>8?W():X(0,0,1)'style='font-size:50px'bgcolor=#"+(u-B?u*.9&1||9:"d")+"0f0e0>&#"+(I[u]?9808+l[67+I[u]]:160):u++&&"<tr>")B=b}W()
    </script>
    <script>
      (function(){var doc=document;var header=doc.getElementsByTagName("header")[0];var firstChild=header.firstChild;var p=doc.getElementsByClassName("p")[0];var n=doc.getElementsByClassName("n")[0];header.insertBefore(p,firstChild);header.insertBefore(n,firstChild);header.appendChild(doc.getElementsByTagName("p")[0])})();
      (function reload(){var doc=document;var header=doc.getElementsByTagName("header")[0];var iframe=doc.createElement("iframe");doc.body.appendChild(iframe);var iwin=iframe.contentWindow;var idoc=iframe.contentDocument;idoc.open();idoc.close();idoc.write('<!doctype html><head><meta charset="utf-8"><body>');idoc.head.innerHTML="<style>\n"+"html, body { margin: 0; padding: 0; border: 0; width: 100%; height: 100%; }\n"+"</style>\n";idoc.body.innerHTML="\n\t\t"+"<canvas"+' id="c"'+''+"></canvas>\n"+
      (false?"<script>\x3c/script>\n":"")+"";var Audio=iwin.Audio;iwin.Audio=function(x){return new Audio(x)};if(false){var canvas=idoc.getElementsByTagName("canvas")[0];iwin.a=canvas.getContext("2d");iwin.b=idoc.body;iwin.c=canvas;var p2d=iwin.Path2D;function wrap(ctx){var fill=ctx.fill,clip=ctx.clip,stroke=ctx.stroke;ctx.scale=ctx.scale;ctx.drawFocusIfNeeded=ctx.drawFocusIfNeeded;ctx.ellipse=ctx.ellipse;ctx.fill=function(r){fill.call(ctx,r==="evenodd"?"evenodd":"nonzero")};ctx.stroke=
        function(p){if(p&&p2d&&p instanceof p2d)stroke.call(ctx,p);else stroke.call(ctx)};ctx.clip=function(p){if(p&&p2d&&p instanceof p2d)clip.call(ctx,p);else clip.call(ctx)};return ctx}if(false){var cvs=iwin.c;var cNode=cvs.cloneNode;cvs.cloneNode=function(){var clone=cNode.apply(cvs,arguments);var cloneGet=clone.getContext;clone.getContext=function(){return wrap(cloneGet.call(clone,"2d"))};return clone};var get=cvs.getContext;cvs.getContext=function(){return wrap(get.call(cvs,"2d"))}}if(false)wrap(iwin.a)}idoc.body.clientWidth;
        var demo=idoc.createElement("script");var scrpt=doc.querySelector('script[type="demo"]').textContent.replace(/m.location=m.location;/,"top.reload();");if(false)scrpt="A=0,B=0;"+scrpt;demo.textContent=scrpt;idoc.body.appendChild(demo);idoc.close();iframe.contentWindow.focus();var r=doc.createElement("div");r.innerHTML="&#8635;";r.className="button r";r.title="restart just the demo (local, without remote fetch)";window.reload=r.onclick=function(){doc.body.removeChild(iframe);r.parentElement.removeChild(r);
          iframe=null;r=null;idoc=null;header=null;reload()};var firstLine=doc.getElementsByTagName("div")[0];header.insertBefore(r,firstLine)})();
    </script>
  </body>
</html>

3D Globe

And finally here is a quick way to add a 3D globe to your web page using OpenGlobus.

<html>
<head><title>OpenGlobus - Earth planet</title>
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <link rel="stylesheet" href="https://cdn.rawgit.com/OpenGlobus/OpenGlobus/eb8392c2/build/og.css" type="text/css" />
    <script src="https://cdn.rawgit.com/OpenGlobus/OpenGlobus/eb8392c2/build/og.js"></script>
</head>
<body>
    <div id="globus" style="width:100%;height:80%"></div>
    <button id="btnOSM">OSM</button>
    <button id="btnMQS">MapQuest Sat.</button>
    <script>

        document.getElementById("btnOSM").onclick = function () {
            osm.setVisibility(true);
        };

        document.getElementById("btnMQS").onclick = function () {
            sat.setVisibility(true);
        };

        var osm = new og.layer.XYZ("OpenStreetMap", {
            specular: [0.0003, 0.00012, 0.00001],
            shininess: 20,
            diffuse: [0.89, 0.9, 0.83],
            isBaseLayer: true,
            url: "http://{s}.tile.openstreetmap.org/{z}/{x}/{y}.png",
            visibility: true,
            attribution: 'Data @ OpenStreetMap contributors, ODbL'
        });

        var sat = new og.layer.XYZ("MapQuest Satellite", {
            shininess: 20,
            specular: og.math.vector3(0.00048, 0.00037, 0.00035),
            diffuse: og.math.vector3(0.88, 0.85, 0.8),
            ambient: og.math.vector3(0.15, 0.1, 0.23),
            isBaseLayer: true,
            url: "https://api.mapbox.com/styles/v1/mapbox/satellite-v9/tiles/256/{z}/{x}/{y}@2x?access_token=pk.eyJ1IjoibWdldmxpY2giLCJhIjoiY2o0ZmVudncwMGZvbjJ3bGE0OGpsejBlZyJ9.RSRJLS0J_U9_lw1Ti1CmsQ",
            visibility: false,
            attribution: '@2014 MapQuest - Portions @2014 "Map data @ <a target="_blank" href="http://www.openstreetmap.org/">OpenStreetMap</a> and contributors, <a target="_blank" href="http://opendatacommons.org/licenses/odbl/"> CC-BY-SA</a>"'
        });

        var controls = [
            og.control.mouseNavigation(),
            og.control.touchNavigation(),
            og.control.zoomControl(),
            og.control.earthCoordinates(),
            og.control.sun()
        ];

        globus = new og.Globus({
            "target": "globus",
            "name": "Earth",
            "controls": controls,
            "terrain": new og.terrainProvider.TerrainProvider("OpenGlobus"),
            "layers": [osm, sat]
        });
    </script>
</body>
</html>

Resources

So now that you know what to do it should be easy to take some of these suggestions and run with it. If nothing else you can find plenty more on gihub.com to help you kill off some of your time.

You can directly follow the link to the Battlefield to play with the code.

I also created a video for these drive-by-coding samples, which you can find here …

Login Form with php and QooxDoo

Sooner or later all web developer will have to create a Login form for one of their projects. You can find a lot of sample code and frameworks out there. In fact this is one of those times where you end up in information overload. There are millions of options but which one to pick ?

QooxDoo is a great framework to write complex web applications which acts and feels like a standard windows client. These so called SPAs ( Single Page Applications ) are a great way to create a valuable presence online and to offer your customers a very special treat.

But is QooxDoo flexible enough to build a stunning login form with it ?

I found that QooxDoo and php go together like peanut butter and jelly. And yes you can also use a RESTFul API to achieve the same however using PHP will offer you one advantage over E.g. a NodeJS based back-end. With most shared hosting services you will not be able to use NodeJS.

Form and Function:

So what are we looking for in a login form ? We want a nice and clean looking interface and we want to have the ability to

  1. Login
  2. Sign Up
  3. Recover password

So we are actually looking at three different forms and not just a single one.

three Login forms
three Login forms

That serves me well

For the PHP back-end I chose a single user class which I found on Github because it keeps things simple enough while at the same time offering some basic type of security. There are plenty of other options for the back-end available and you can shoe-horn any back-end into this solution really.

The PHP code was adjusted a bit and I added the code in here for your convenience. You can also download the PHP code from the following link Secure-User-Login-And-Authentication-Class

Here is the code which I added. Obviously in a real environment you want to separate this code out into its own file ( or files ).

// Simple input handling.
// Please note that no user input validation is done
$auth = new userAuth;
$type = $_GET['type'];
$name = $_GET['username'];
$pass = $_GET['password'];
$email= $_GET['email'];
$remember = $GET['remember'];
switch ( $type )  {
  case "login":  echo $auth->user_login  ( $name, $pass, $remember ) ? "true" : "false"; break;
  case "logout": echo $auth->user_logout ( ) ? "true" : "false"; break;
  case "forgot": echo $auth->forgot_password ( $email ) ? "true" : "false"; break;
  case "signup": echo $auth->create_user ( $name, $pass, $email, $remember ) ? "true" : "false"; break;
  case "check":  echo $auth->is_logged_in ( ) ? "true" : "false"; break;
  case "newDB":  echo $auth->create_user_table ( ) ? "true" : "false"; break;
  default: echo "Bad type"; break;
}

Now since we are going to use Ajax calls to the backend please keep in mind that any additional request to the backend ( E.g. like to display user data ) must be secured on the server side. You cannot rely on any security checks on the client side.

Login Form

In this post I want to mostly focus on the front-end part of the Login Form. Using QooxDoo to build the UI will require a few tweaks to the look and feel of the widgets in here.

I could have gone and created new styles following the qooxdoo way and I could have also created the LoginForm using the standard generate.py server side script. However I chose to use a functional complete, minified, qooxdoo library instead to bootstrap this application.

<!DOCTYPE html>
<html>
<head>
    <title>login</title>
    <meta charset="utf-8">
    <meta name="Author" CONTENT="SoftwareSamurai">
    <meta name="Description" CONTENT="login" />
    <meta name="Keywords" CONTENT="some keywords" />
    <meta name="Classification" CONTENT="Klassifizierung">
    <script type="text/javascript" src="script/qx-6.0.0a.min.js"></script>
    <script type="text/javascript" src="LoginWindow.js"></script>
    <script type="text/javascript" src="SignupWindow.js"></script>
    <script type="text/javascript" src="ForgotWindow.js"></script>
    <script type="text/javascript" src="ApplicationWindow.js"></script>
</head>
<body>
  <script type="text/javascript">
    qx.Class.define ( "LoginWindow.Application", {
      extend : qx.application.Standalone,
      members: {
        main : function ( )  {
          this.base ( arguments );
          if ( qx.core.Environment.get ( "qx.debug" ) )  {
            qx.log.appender.Native;
            qx.log.appender.Console;
          }
          var root = this.getRoot ( );
          var decorator = new qx.ui.decoration.Decorator ( );
          decorator.setBackgroundImage ( "background.jpg" );
          decorator.setBackgroundRepeat( "scale" );
          this.getRoot ( ).setDecorator( decorator );
          this.rpc ( "type=check", function ( success )  {
            var win = null;
            if ( success )
              win = new ao.apps.users.SoftwareSamurai.ApplicationWindow ( );
            else
              win = new ao.apps.users.SoftwareSamurai.LoginWindow ( );
            win.show ( );
          },this );
        },
        rpc : function ( str, cb, ctx )  {
          var rpc = new qx.io.request.Xhr ( "user.class.php?"+str );
          rpc.addListener ( "success", function ( e, x, y ) {
             var req = e.getTarget ( );
             var rsp = req.getResponse ( );
             cb.call ( ctx, ( rsp === "true" ) );
          }, this );
          rpc.send ( );
        }
      }
    } );
    qx.core.Environment.add ( "qx.application", "LoginWindow.Application" );
  </script>
</body>
</html>

Using this approach has the advantage of being able to rapidly develop your application and then use the standard QooxDoo tools to compile and minify once you are sure you have all you want.
For a standard QooxDoo application you have the Application.js file, which I have folded into this html file.

So lets go though this code above:
Line 10 : Here we load the complete qooxdoo library in a minified version.
Linew 11 – 14 : These are the classes we are going to create today.
Line 18 : Every QooxDoo application has to be derived off of qx.application.Standalone.
Line 21 : This is the main entry function which is called once the application is completely loadedinto the browser and the widgets are initialized.
Line 28 – 31 : In order to set the background image for the complete window we have to set the applications decorator.
Line 32 – 39: These lines of code do call the backend and if the user is already logged in, then we display the main application window, otherwise we display the login form.
Line 41 – 49 : This function will call the backend form ( “user.class.php ), and call the supplied callback function back in the supplied context ( object ).
Line 52 : In order to create a qooxdoo application you have to set this variable to allow the framework to instantiate the appropriate class as the main application.

Log me in Scotty

If you are not currently already logged in you will create a new instance of LoginWindow. So lets take a look at this class.

One word upfront though first. All three classes are very similar in structure, so I will only talk about the LoginWindow here. You can find the code of the other classes following the link below this blog.

The first thing we have to take care of is to create the actual widgets.

qx.Class.define ( "ao.apps.users.SoftwareSamurai.LoginWindow",
{
  extend : qx.ui.container.Composite,
  construct : function ( ) {
    this.base ( arguments );
    this.setLayout ( new qx.ui.layout.Canvas ( ) );
    this.set ( { width: 300, height: 200 } );
    this._buildLogin ( );
    var top  = parseInt ( ( qx.bom.Document.getHeight ( ) - 200 ) / 2, 10 );
    var left = parseInt ( ( qx.bom.Document.getWidth  ( ) - 300 ) / 2, 10 );
    var app  = qx.core.Init.getApplication ( );
    var root = app.getRoot( );
    root.add ( this, { top: top, left: left } );
  },
  destruct : function ( )  {
  },
  members  :  {
    _buildLogin : function ( )  {
      var semi = new qx.ui.core.Widget ( );
      semi.set ( { opacity: 0.6, backgroundColor: "#404040" } );
      this.add ( semi, { top: 1, left: 1, right: 1, bottom: 1 } );

      var font = new qx.bom.Font ( 24, [ "Arial" ] );
      font.setBold ( true );
      //font.setColor ( "#FFFFFF" );
      var lbl = new qx.ui.basic.Label ( "<center><b style='color: #FFFFFF'>" + this.tr ( "Log in" ) + "</b></center>" );
      lbl.setFont ( font );
      lbl.setRich ( true );
      lbl.setWidth( this.getWidth ( ) - 20  );
      this.add ( lbl, { top: 10, left: 10 } );

      var line = new qx.ui.core.Widget ( );
      line.set ( { height: 2, backgroundColor: '#FFFFFF' } );
      this.add ( line, { top: 50, left: 10, right: 10 } );

      var name = new qx.ui.form.TextField ( );
      name.setPlaceholder ( this.tr ( "Username" ) );
      this.add ( name, { top: 65, left: 10, right: 10 } );
      this._name = name;

      var pass = new qx.ui.form.PasswordField ( );
      pass.setPlaceholder ( this.tr ( "Password" ) );
      this.add ( pass, { top: 100, left: 10, right: 10 } );
      this._pass = pass;

      var chk = new qx.ui.form.CheckBox ( "<b style='color: #FFFFFF'>" + this.tr ( "Remember me ?" ) + "</b>" );
      lbl = chk.getChildControl ( "label" );
      lbl.setRich ( true );
      this.add ( chk, { top: 130, left: 10 } );
      this._remember = chk;

      var strForgot = "<center><i style='color: white'>" + this.tr ( "Forgot Password ?" ) + "</i></center>";
      var btnForgot = new qx.ui.basic.Atom ( strForgot );
      btnForgot.set ( { cursor: 'pointer' } );
      lbl = btnForgot.getChildControl ( "label" );
      lbl.setRich ( true );
      lbl.setAllowGrowY ( true );
      btnForgot.addListener( "mouseover", function ( )  {
        btnForgot.setLabel ( "<u style='color: white'>" + strForgot + "</u>" );
      },this );
      btnForgot.addListener( "mouseout", function ( )  {
        btnForgot.setLabel ( strForgot );
      },this );
      btnForgot.addListener( "click", function ( )  {
        this.forgot ( );
      },this );
      this.add ( btnForgot, { top: 130, right: 10 } );

      var width = parseInt ( ( this.getWidth ( ) - 30 ) / 2, 10 );
      var btnLogin = this._createBtn ( this.tr ( "Log in" ), "#AAAAFF70", width, function ( ) {
         this.login ( );
      }, this );
      this.add ( btnLogin, { bottom: 10, left: 10 } );
      var btnSignup = this._createBtn ( this.tr ( "Sign Up" ), "#AAFFAA70", width, function ( ) {
         this.signup ( );
      }, this );
      this.add ( btnSignup, { bottom: 10, right: 10 } );
    }
  }
} );

Line 1: We define the class name following the qooxdoo naming convention.
Line 3: Instead of creating a Window with a title etc we simply create a Container
Line 4 – 14: The constructor takes care of the initialization. I want to point out qx.bom.Document.getHeight ( ) which will give you the size of the browser window.
Line 11 – 13: Getting the applications root window and adding the LoginWindow to the root.
Line 19 – 21: The semi transparent background. If we would set the opacity of the actual LoginWindow we would also create the buttons and the text with the set opacity which is not wanted.
Line 46 – 50: For the checkbox we want to change the text color to white. In order to achieve this we have to get the actual Label object, and then use plain HTML to change the color.
Line 52 – 67: Here we build a widget which behaves like a HTML link. There are many ways this could be done, so consider this one of the solutions. Also please note that I am using a Atom instead of a Button object here.
Line 69 – 77: Finally we create the Log In and Sign up buttons. This is done using a function which takes in the required attributes and a callback function.

Lets inspect how we create the buttons and their custom looks.

    _createBtn : function ( txt, clr, width, cb, ctx )  {
      var btn = new qx.ui.form.Button ( "<b style='color: white'>" + txt + "</b>" );
      btn.set ( { width: width, cursor: 'pointer' } );
      lbl = btn.getChildControl ( "label" );
      lbl.setRich ( true );
      btn.addListenerOnce ( "appear", function ( )  {
        this.setBGColor ( btn, "#AAAAAA00", "#AAAAAA00" );
      },this );
      btn.addListener ( "mouseover", function ( )  {
        this.setBGColor ( btn, clr, clr );
      },this );
      btn.addListener ( "mouseout", function ( )  {
        this.setBGColor ( btn, "#AAAAAA00", "#AAAAAA00" );
      },this );
      btn.addListener ( "execute", function ( e )  {
         cb.call ( this );
      }, ctx );
      return btn;
    },
    setBGColor : function ( btn, clr1, clr2 ) {
       var elem = btn.getContentElement ( );
       var dom  = elem.getDomElement ( );
       var img  = "linear-gradient(" + clr1 + " 35%, " + clr2 + " 100%)";
       if ( dom.style.setProperty )
            dom.style.setProperty ( "background-image", img, null );
       else
            dom.style.setAttribute ( "backgroundImage", img );
    },

Line 2 – 5 : The first few lines of the _createBtn function we create a button and then change the text color to white.
Line 6 – 8 : The first time the button is rendered we will go ahead and change the background color. If we call the function before the button is visible, then the DOM element would be null.
Line 9 – 14 : These two callback function handle the case when the mouse gets into and out of the widget. In this case we are going to change the background color of the button.
Line 15 – 17 : We handle the execute event and are going to call the registered function back. Please take note of the way I implemented the callback, which will retain the context ( object ) inside the function. In object oriented programming you want to always use and handle the data inside an object so it is important to remain in the appropriate context.
Line 20 – 28 : In order to set the buttons background color we have to modify the DOM element directly. Please remember that this is not the way I would change the style of a button if I wanted to use it throughout the rest of the application. This is a quick way to get to change the gradient background color.

… and action.

The following functions handle the button action.

    forgot : function ( )  {
      var forgot = new ao.apps.users.SoftwareSamurai.ForgotWindow ( );
      forgot.show  ( );
      this.destroy ( );
    },
    login : function ( )  {
      var name = this._name.getValue ( );
      var pass = this._pass.getValue ( );
      var remember = this._remember.getValue ( );
      if ( name.length < 1 || pass.length < 1 )  {
        alert ( this.tr ( "Please provie username and password" ) );
        return;
      }

      var str = "type=login";
      str += "&username="+name;
      str += "&password="+pass;
      str += "&remember="+remember;
      var app = qx.core.Init.getApplication ( );
      app.rpc ( str, function ( success ) {
        var win = null;
        if ( success )  {
          win = new ao.apps.users.SoftwareSamurai.ApplicationWindow ( );
          win.show ( );
          this.destroy ( );
        }
        else  {
          alert ( this.tr ( "Could not log in." ) );
        }
      }, this );
    },
    signup : function ( )  {
      var signup = new ao.apps.users.SoftwareSamurai.SignupWindow ( );
      signup.show  ( );
      this.destroy ( );
    },

Line 1 – 5 : The forgot function will create and display the ForgotWindow form and destroy the Login form.
Line 6 – 13 : we retrieve the values the user entered and do some basic sanity checking.
Line 15 – 18 : Here we build the query string to send to the back-end.
Line 19 – 20 : We get the application object to invoke the rpc function.
Line 21 – 29 : Once the server returns we check if we were successful in logging in. If yes, then we hide the Login form and start the main ApplicationWindow.
Line 32 – 36 : The signup function will create and display the SignupWindow form and destroy the Login form.

Let’s wrap it up

Congratulations, you have done it. You are now able to build your own complex web applications on a shared hosting service, such as Dreamhost with as little as $8,- per month.

DreamHost.

Resources

Live sample

Create a stunning login form using QooxDoo and PHP

Note: try user “test” and password “abc123” or create a new user.

I also created a video on creating a stunning login form using QooxDoo, which you can find here …

Please follow this link here … to play with the code.