App guidelines

[FantasyFactory]

starting from stopwatch and weather I'm trying to develop my first twatch "app";

Apps (APPNAME, replace it with what you like) must be included in main file my-ttgo-watch.ino
thru #include "app/APPNAME/APPNAME.h"
then adding a setup function APPNAME_setup(); in the arduino setup() function

the APPNAME_setup( void ) function basically will create the gui thru the lvgl library, read the json config file, then wil do some other initialization

#ifdef APPNAME_WIDGET will enable some other functions (more than mere icon show in main tile, but I've not yet understood)

This is the little I understand :D

Events handling are due by callback functions. Most of them are related to lvgl, but which "system events"or hooks we can handle ? For example, what I have to do to handle a custom message not handled by bluetooth_message_msg_pharse() or override it's handling ?

So, there is some visual editor for the lvgl gui ?
What are the guidelines for developing an App that correctly interact whith the framework "My-ttgo-watch" ?

[FantasyFactory]

despite the little time I have to devote to this beautiful toy, I am writing my first "app" :D it is a simple application that reads from the web an image, such as in my case an image coming from a surveillance camera. In this way I'm also trying to write a guide that might be useful to others who want to try to write some simple app for this watch. Unfortunately at the moment I can only read via http but NOT https, if anyone can help me... regarding the image format, I had initially attempted a porting of TJpgDec, but at the moment I have dropped the jpgs and I am content with the png that seem simpler and less exhite than ram. I implemented the lodepng library with a few minor modifications, and its custom decoder for lvgl.

[jasongayda]

So, there is some visual editor for the lvgl gui ?

@FantasyFactory : You can use this application to create GUI for the watch.
https://www.nxp.com/design/software/development-software/gui-guider:GUI-GUIDER
It will even export code for you to use in your app.

[jasongayda]

despite the little time I have to devote to this beautiful toy, I am writing my first "app" :D it is a simple application that reads from the web an image, such as in my case an image coming from a surveillance camera. In this way I'm also trying to write a guide that might be useful to others who want to try to write some simple app for this watch. Unfortunately at the moment I can only read via http but NOT https, if anyone can help me... regarding the image format, I had initially attempted a porting of TJpgDec, but at the moment I have dropped the jpgs and I am content with the png that seem simpler and less exhite than ram. I implemented the lodepng library with a few minor modifications, and its custom decoder for lvgl.

@FantasyFactory : you can use this tool for image conversion: https://lvgl.io/tools/imageconverter

[drunkscientist]

so just today lvgl guys released a beta version of the ui editor, they call it edgeline, here is a video, here is a link to it, its currently windows only and missing most of the widgets still but i thought id share