lqml/readme-qml-live-preview-and-slime.md

Please note: the below may be convenient for sketching -- but during development, the simple -auto option of lqml run.lisp may be more appropriate, because it allows for re-initialization (calling Lisp code) after reloading QML.

The above method also works on mobile, please see example advanced-qml-auto-realod. It doesn't depend on Swank, and should therefore also be stable (it uses a local trivial web server).

You may even run both desktop and (one or more) mobile device auto reloads simultaneously (swank-server example only), because they all watch/load the same QML sources, if they point to the same desktop IP

QML Preview and Slime

(LQML >= 22.2.2, see lqml -v)

This shows how to use QML Preview (live QML updates while you are typing).

• edit lisp/main.lisp of an example, and append this line:

(load "~/slime/lqml-start-swank.lisp")

• open app.pro in Qt Creator; under 'Projects' (menu on the left) / 'Configure Project' choose 'Debug' and change the 'Build directory' to build/ from the example

• in the 'Edit' view of Qt Creator make sure that 'Debug' is selected (menu on the left, near the bottom); from the menu at the top choose 'Build / QML Preview' (after a 'Build / Clean')

Now the example should compile and start. You may now select any QML file from the tree view on the left, and any change to QML will be shown immediately in the running app.

Additionally you may also run M-x slime-connect from Emacs (the Swank server should already be running, see 'Application Output' at the bottom of Qt Creator).

Screenshot

So, this is certainly a nice feature of Qt Creator, but personally I prefer the simple lqml run.lisp -auto variant, which doesn't need compilation, and -- more importantly -- can run Lisp code after a QML reload.