Bounding box styling of individual parts of multipart objects

Question

In my QGIS project I have a multi-linestring vector layer where each multi-linestring feature consists of small not connected linestrings.

I would like to show a bounding box around each of the parts of each multi-linestring object like in the following example:

If I use the following styling

bounds($geometry)

I just get a bounding box around the entire multi-linestring object.

Is it possible to visualise the bounding box of each of the parts of the multi-linestring objects without creating a new single part dataset?

Answer 1

With a small test sample as below:

(1) A multipart line layer.

(2) Created a polygon by geometry generator bounds($geometry). One large box encompasses all lines, as you have pointed out...

(3) So I used bounds(geometry_n($geometry, @geometry_part_num)), to create a box for each line.

Hope these red boxes (dashed) are what you were looking for.