[Core] Access bounding boxes of scrolling containers

[hexmaster111]

Moved a few internal types into public for other .c files that don't have clay_impl defined.

I was unable to get at the internal data from another c file, so I moved these defs up past the clay impl define.

Im using it to impl a slider control like this

            Clay_ScrollContainerData track = Clay_GetScrollContainerData(sliderId);
            Clay_ScrollContainerData thumb = Clay_GetScrollContainerData(thumbId);
            Clay__ScrollContainerDataInternal *track_internal_data = FindScrollContainerDataInternal(sliderId);
            Clay__ScrollContainerDataInternal *thumb_internal_data = FindScrollContainerDataInternal(thumbId);

            if (track.found && thumb.found && track_internal_data && thumb_internal_data)
            {
                // put the track where the users currsor is clicking on the track

                Vector2 mousePos = GetMousePosition();
                Vector2 trackPos = (Vector2){track_internal_data->boundingBox.x, track_internal_data->boundingBox.y};

                Vector2 mouseRelitiveToTrack = Vector2Subtract(mousePos, trackPos);
                Vector2 trackSize = (Vector2){track_internal_data->boundingBox.width, track_internal_data->boundingBox.height};

                Vector2 click_percent = (Vector2){
                    .x = ScailFloat(mouseRelitiveToTrack.x - thumb_internal_data->boundingBox.width * 0.5f, 0, trackSize.x - thumb_internal_data->boundingBox.width * 0.5f, 0, 1),
                    .y = ScailFloat(mouseRelitiveToTrack.y - thumb_internal_data->boundingBox.height * 0.5f, 0, trackSize.y - thumb_internal_data->boundingBox.height * 0.5f, 0, 1)};

                *value = Clamp(ScailFloat(click_percent.x, 0, 1, min, max), min, max);
            }

And the helper func to make searching for things a little nicer todo

Clay__ScrollContainerDataInternal *FindScrollContainerDataInternal(Clay_ElementId id)
{
    Clay__ScrollContainerDataInternal *find = NULL;
    for (int sidx = 0; sidx < Clay__scrollContainerDatas.length; sidx++)
    {
        find = Clay__ScrollContainerDataInternalArray_Get(
            &Clay__scrollContainerDatas,
            sidx);

        if (find->elementId == id.id)
        {
            break;
        }

        find = NULL;
    }

    return find;
}

[nicbarker]

Hello! Just to make sure I understand correctly, you want to access the bounding box of the scroll element?
If that's the case, I'll expand the public facing Clay_ScrollContainerData to include the bounding box so you can get it in one call, with the current api 🙂

[nicbarker]

That being said, there should probably be a public API for just querying the bounds of any element by id 🤔

[hexmaster111]

Ah, yeah, I'm pretty sure me making them scroll boxes was a part of some earlier hacking around with clay. An API for getting the bounding box of any element would make a lot of sense!