Some ideas for GUI development

[TheSimpleZ]

Here are a few things that would be amazing to have for GUI development:

Support for newlines inside genpage_add() and genpage_change():
I would like to be able to format the text I feed to this function using newlines. Currently, it breaks things.
Doing something like this:

int line = genpage_add("");
genpage_change("Hello\nWorld", line);
genpage_change("foo", line);

should result in "foo" being displayed, but right now it displays "foo\nWorld".

Add support for formatting the layout of a page:
For example, I'd like to be able to add padding/margins to text to control it's horizontal/vertical position.
Would be amazing if I could define a page to be vertically centered. It's useful for single page apps that shows a small piece of text.

Support removing lines:
A function similar to genpage_change, let's call it genpage_delete, which takes a line number as single argument.
Would be super useful for showing a temporary piece of text based on some condition.

Add support for showing images using general_page:
Why?! Because syntax is much nicer than the adafruit stuff.

---

One suggestion is to make the UI based on some primitives such as text boxes, image boxes, etc. That way, I can do something like:

auto tb = genpage_textbox("Some text \n with line breaks"); // Auto because i haven't thought of what dataype to use 
genpage_add(tb);
textbox_set(tb, "Some other piece of text");
set_padding(tb, 10, 10, 10, 10); // add 10 px padding on all sides
genpage_delete(tb);

These are just some unstructured thoughts that popped up while developing the gadgetbridge stuff. Let me know if you'd like me to elaborate something.

[Szybet]

Done

Making it textbox based that every line could be customised invidually would need a whole rewrite. Maybe in the future.

For now:

• genpage_set_center_vertical(), call after init_general_page
• genpage_remove
• genpage_insert

Let me know if it works (Also, if there is a major performance impact)

Note: Do not use static numbers when operating genpage functions, use only what genpage_add returns to you (And what genpage_insert returns too). It's not a id increasing system, so the line on the screen, after some removing and inserting can have a random line "id"