[capink]

Originally Posted by Hortensia

I am attaching an image for easier explaination: the custom action you refers to is equivalent to clicking on the option I framed in red (that is at least what I understand) while I want a custom action equivalent to clicking on the option I framed in blue.

With the custom action you suggest, I have a cover I do not want in the ebook and I set this cover as the ebook cover. I need to generate the cover.

Try this:

from calibre.ebooks.covers import generate_cover
from calibre.gui2.covers import CoverSettingsWidget
from calibre_plugins.action_chains.actions.base import ChainAction

class ConfigWidget(CoverSettingsWidget):
    def __init__(self, plugin_action):
        CoverSettingsWidget.__init__(self)
        self.plugin_action = plugin_action
        self.gui = plugin_action.gui
        self.db = self.gui.current_db

    def load_settings(self, settings):
        self.apply_prefs(settings)

    def save_settings(self):
        return self.prefs_for_rendering

class GenerateCover(ChainAction):

    name = 'Generate Cover'
    support_scopes = True

    def run(self, gui, settings, chain):
        db = gui.current_db
        book_ids = chain.scope().get_book_ids()

        for book_id in book_ids:
            mi = db.get_metadata(book_id, index_is_id=True)
            cdata = generate_cover(mi, settings)
            db.new_api.set_cover({book_id:cdata})

    def config_widget(self):
        return ConfigWidget