RoboFont is highly extendable in any direction from subclassing existing classes to adding new features and functionality in a new tool.
There are many levels how to interact with RoboFont and how to handle various parts: font data, UI, user interaction, ...
A tiny script using roboFab to add actions/features/functionalities to a menu item or key stroke.
# convert to monospace font from robofab.interface.all.dialogs import AskString value = AskString("Monospace width:") try: value = int(value) except ValueError: value = None if value: font = CurrentFont() for glyph in font: glyph.width = value
Save this script in the default script folder to extend RoboFont Extensions menu. See the preferences to add a short cut to a specific script.
Observers & Tools
RoboFont is being build up around a core that is just sending out notifications. A script can subscribe to one or more notifications and perform an action based on the send notification.
There are three kinds of notifications inside RoboFont
- Native Cocoa Notifications
When the app opens, closes, hides; when a window resizes; when a text field changed, ...
- Font Data Notifications
Font data notifications are being send out when the font data is being changed. Those notifications are already natively in defcon and extended in RoboFont.
- RoboFont Notifications
RoboFont notifications are being send from several places: Glyph Editor, Space Centers, based on users interaction related to adjusting, changing font data.
There are two systems build in to subscribe to notifications:
- As an Observer
A class, the observer will subscribe to a specific notification. When the notification is being send it will receive a callback with additional info and objects related to the notification.
- As a Tool
A tools receives all the notifications RoboFont has, but it only can be activated when an user selected the tool from the toolbar in the glyph editor.