Add a variable to set the width of the Preview pane

[ronniedroid]

Right now the preview pane is set to a default width.

Make the preview pane width optional using a variable.

[ronniedroid]

I am actually working on this, I made a custom variable named dired-preview-window-width which I am using inside the dired-preview-display-action-alist like so

(defcustom dired-preview-display-action-alist
  `((display-buffer-in-side-window)
    (side . right)
    (slot . -1)
    (window-width . ,dired-preview-window-width)
    (dedicated . t)
    ....

and it works well when I use either setq or customize-set-variable but only after a restart, not after evaluating the value, which means if the value is changed using the graphical customization interface, it won't be applied correctly until a restart to emacs. How can I fix this? will I need to use a hook?

I am sorry for my newbie question, this is my fist elisp contribution.

[protesilaos]

Hi @ronniedroid! This is covered by the user option dired-preview-display-action-alist-function. Granted, it is for experienced users. I have not yet decided how best to make it accessible to less experienced users: it won't be easy, given that display-buffer is inherently complex.

At any rate, the primary goal at this stage is to have a stable core. The extra features will be added later.

[ronniedroid]

Then I will wait for the stable version to come out then come back to this again.

[protesilaos]

As I noted before, there is a customisation option that covers this need. This can be closed now.