B4J Tutorials

[BANano] How to Edit / Sign existing PDF Documents?

Hi Fam

I wanted to sign PDF documents in my product. So.. I used the PDF-LIB for this.

1. I designed a screen to enter the signature and initials.



2. The canvas we use...
 
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jFreeTTS Text2Speech Library

Hi there, it's a pleasure to get this working...



My jFreeTTS is a library that I've just managed to cook for text to speech using the FreeTTS library.

1. Download the FreeTTS...
 

Attachments

  • jFreeTTS.zip
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  • Mbrola.png
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[SithasoDaisy5] A JSON Web Editor you will love from the creator of MathJS

Hi Fam

This has been one of those components that I postponed to do. The creator of MathJS, a javascript library that I have been using for a while, also created a JSON Editor. I decided to...
 
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[SithasoDaisy5] Effortlessly visualize JSON structures as dynamic tree diagrams

Hi Fam

With SithasoDaisy5, you have the capability to view JSON files as dynamic trees. This is wrapping this Github project.




The code is as simple as feeding the component...
 
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[SithasoDaisy5] Creating your Organogram / Family tree

Hi Fam

With SithasoDaisy5, you will be able to create Organograms / Family Trees. Drop a SDUI5TreeSpider on your form and whala!

This is wrapped from this GitHub Project



B4X: 
...
 
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[SithasoDaisy5] Creating your first MySQL CRUD WebApp using REST API With API-Key (Php)

Hi Fam

Before you start this tutorial, please ensure that your dev environment is setup by following this tutorial...
 

Attachments

  • SithasoDaisy5Pages.zip
    87.9 KB · Views: 239
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[PyBridge] pyvips - image manipulation library

pyvips is a very powerful image manipulation library. It can manipulate very large images. I've created a modified "HugeImageView" based on it as an example. It can show 1-2 GB images...
 

Attachments

  • SuperHugeIV.zip
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[ABMaterial][BANano] Issue(s) with developing in both

First post, first issue:
I'm in the process of developing an ABM application. For testing purposes, I uploaded the application on my test server. The application may start fine, but when loading...
 
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[PyBridge] The very basics

PyBridge is a framework that allows accessing Python libraries from within B4J.

It works by starting a Python process that connects to the B4J process. The Python process receives commands from...
 
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WebGL library, working with physics engines - Part 1

Hi all,

here a simple shooter game using B4J WebGL libary and cannon.js physic engine.

Note that really I use cannon-es that is a port of cannon.js to use inside Javascript ES6 modules.

Note...
 

Attachments

  • jWebGL_Physics_Engines.zip
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  • Screenshot 2025-03-17 020320.jpg
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  • Screenshot 2025-03-17 020910.jpg
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  • Screenshot 2025-03-17 021855.jpg
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[PyBridge][server] Using PyBridge in web apps

PyBridge must be accessed from a single thread. In server solutions, each handler runs in its own thread so we need to add some barriers to ensure proper usage.

The way to implement it is by...
 

Attachments

  • ServerWithPyBridge.zip
    14.8 KB · Views: 233
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[PyBridge] Communicating with Raspberry Pi

This sophisticated project does one thing - the user clicks on a hardware button, connected to the RPi, and a notification appears on the PC.



The setup:
RPi running Mosquitto broker...
 
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Make a simple 3D game with WebGL library, with gravity and collisions in less than 300 lines of code.

Hi all,

this code will show how to make a simple 3D game, with gravity and collisions by code without use any physics engine.

I want to remember that with WebGL library you can use more than one...
 

Attachments

  • jWebGL_SimpleGame.zip
    292.8 KB · Views: 244
  • Screenshot 2025-03-11 150808.jpg
    160.6 KB · Views: 265
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SithasoDaisy TailwindCSS UI Toolkit: Q & A

Hi there

NB: Where possible, please include a simple project that demonstrates your use case.

Do you have any questions about SithasoDaisy UI Toolkit?

You can shoot it here...
 
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Raspberry Pi 5 - first steps

Getting the RPi 5 to work with B4J is very simple.

I've tested it with the recommended 64 bit Raspbian OS (bookworm).

1. Download and unpack the Linux ARM Full JDK (21)...
 
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Shrinking that SQLite JDBC library!

NOTE: This isnt recommened for everyone, this is just something that works for me. Removing support for specific platforms could cause your app to stop working.

I use SQLite for a lot of...
 
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[B4X] [PyBridge] Desktop - Mobile Communication based on BLE (Bluetooth Low Energy)

Attachments

  • B4XPeripheral.zip
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  • B4JCentral.zip
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Deutsche Post Internetmarke - get Stamps per Api

This Thread is about the german Post and their free Api Service for Postalstamps and other Services...
 
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[Web][SithasoDaisy5] Designing Web Forms with SDUIPreferences - Part 1

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Integrated B4JPackager11 - The simple way to distribute standalone UI apps

B4JPackager11 is a utility written in B4J that uses the underlying Java tools to create a standalone package that doesn't depend on any other software being installed.
It works with OpenJDK 11 and...
 

Attachments

  • jssc.zip
    69.6 KB · Views: 326
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