Topic list custom view

Take a look at the Topic List Previews plugin. I recently added a Masonry ‘renderer’ to it (and continue to enhance that). Your screen shot is not a million miles away from that work.

It’s surprisingly straightforward once you get into the groove.

You just need to override the topic-list and topic-list-item components and their templates and add your custom CSS.

Each of the internal elements in your above screenshot can just be divs you arrange in e.g. a CSS grid which you render for each topic.

You could fork TLP as a head start.