Exit GUI Plugin

[feuille]

Sorry if this is a stupid question: But how do I exit a GUI plugin without starting the main dialog if an error occurs during initialization?

Example: If the user has not selected a book, I print the following message in the __init__ method of class MyGuiPluginDialog(QDialog):

d = error_dialog(self.gui, 'MyGuiPlugin', _('No book selected!'))
d.exec()

This will display the Calibre error dialog. So good so far...

But how do I stop executing the plugin at this point?

"return" shows the error dialog again, after "OK" the main dialog of the plugin is shown.
"sys.exit()" closes Calibre itself.

[kovidgoyal]

You perform the check before creating your dialog, and return from whatever function you are creating the dialog in.

[thiago.eec]

Originally Posted by feuille

d = error_dialog(self.gui, 'MyGuiPlugin', _('No book selected!'))
d.exec()

I usually do it like this:

from calibre.gui2 import error_dialog

def some_function():
      do_stuff
      if some_condition:
            return error_dialog(self.gui, 'MyGuiPlugin', _('No book selected!'), show_copy_button=False, show=True)

This will exit some_function.