plug-ins: add busy-dialog plug-in
This plug-in is used internally to show an interactive dialog in a separate process, while the main process is blocking waiting for an operation to complete. The dialog shows a custom message in a GimpBusyBox, and potentially a "cancel" button, allowing the operation to be canceled. Communication with the main process is performed through a pair of file descriptors, passed to the plug-in as arguments.
Showing with 332 additions and 0 deletions