Help Getting a Plugin to Work

[dunhill]

Theme Switcher Plugin for Calibre
This interface plugin allows you to apply custom visual themes in Calibre using palette files (*.calibre-palette) and stylesheets (*.qss). Its goal is to offer a modular and reproducible way to change the look of the graphical interface, including background colors, text, buttons, and scroll bars.

🔧 What does it do?
Adds an icon to the Calibre toolbar to access the theme switcher.

Automatically detects .calibre-palette files located in ~/.config/calibre/themes/.

Allows you to select and apply a theme from a popup window.

Applies the color palette using Qt's QPalette.

Apply additional visual styles (such as scroll bars) using .qss files from the plugin's resources/ folder.

Supports multiple themes: dark, light, custom, and any others added manually.

📁 Structure Requirements
Themes must be in ~/.config/calibre/themes/ with an INI file and a .calibre-palette extension.

The .qss styles must be in resources/ within the plugin, with names like scrollbar-dark.qss, scrollbar-light.qss, etc.

The plugin icon must be in images/icon.png.

But the icon doesn't appear in the toolbar. If someone could review it to make it functional, I'd be happy to share the credits.

[BetterRed]

Moderator Notice
@dunhill

Asking for help in developing a plugin is not the intended purpose of the Plugin ideas thread. This is where it belongs… Developer's Corner

BR

[BeckyEbook]

Misc issues.
The text file name is very important and must be unique READ:

plugin-import-name-theme_switcher.txt

I suggest a slight redesign and the use of `common_icons.py` by Grant Drake.
This is just a suggestion, because you can write your own icon handling and add it to the plugin.

[dunhill]

Originally Posted by BetterRed

@dunhill

Asking for help in developing a plugin is not the intended purpose of the Plugin ideas thread. This is where it belongs… Developer's Corner

BR

Sorry, I thought the thread your ideas were correct, but you always learn, it won't happen again.

[dunhill]

Originally Posted by BeckyEbook

Misc issues.
The text file name is very important and must be unique READ:

plugin-import-name-theme_switcher.txt

I suggest a slight redesign and the use of `common_icons.py` by Grant Drake.
This is just a suggestion, because you can write your own icon handling and add it to the plugin.

Thanks for your advice!!

[dunhill]

It seems to me that I have to study this file src/calibre/gui2/tweak_book/editor/themes.py which I suppose is the one that chooses the color settings or calibre-palette files so that it takes effect when selecting the file from the plugin interface.


So far the files appear in the interface but selecting them has no effect.