On Sunday, 9 July 2017 at 19:43:14 UTC, Christian Köstlin wrote:
I wonder if there is any fiber based / fiber compatible UI-Toolkit out for dlang. The second question is, if it would make sense at all to have such a thing?
As previously noted, like other UI toolkits GTK maintains a single thread for processing UI events with an event loop running in that thread. GTK does support passing a function to be called when the main loop is idle, it could be possible to leverage this to manage fibers with appropriate yielding.
Having said that, I'm in the camp where this doesn't make much sense. Using fibers on the main UI thread is likely going to result in a blocked UI whenever a fiber takes too long to do its work. History has shown that cooperative multi-tasking typically doesn't work well for UI applications.
I think you would be much better off starting an additional thread and managing fibers in that thread outside the context of the main UI thread. You can then use things like std.concurrency to receive messages from the external thread to update the UI as needed in it's own thread.
