There is a new appliacation available for Sparkers: Notepadqq.

From the project web site:

Notepadqq is designed from developers, for developers. With its more than 100 supported languages, it is the ideal text editor for your daily tasks.
The project is completely Free and Open Source.

sudo apt update
sudo apt install notepadqq

The editor is Qt based, but there is an additional package to be installed, to support GTK based styles:
sudo apt install notepadqq-gtk
Then run the application from menu-> Development

The editor should replace Leafpad in the Sparky’s LXQt spin.