![]() ![]() It offers impressive functionality for both print and digital design, and, it can import InDesign files. It can be used to create everything from posters and flyers to brochures, catalogues, and magazines, as well as ebooks and web and mobile apps. QuarkXPress is actually a very powerful and well-featured DTP package that definitely gives InDesign a run for its money.Īvailable for PC or Mac, the software is still updated on an annual basis, usually around late spring/early summer. QuarkXPress dates back to 1987, and while InDesign has since completely stolen its thunder, it's still available and it remains a good InDesign alternative. The package has a one-off cost of £49.99 / £48.99, with a few templates thrown in, making it a good value if not an entirely comprehensive InDesign alternative get all the facts in our Affinity Publisher review.īack in the days before InDesign was even a thing, QuarkXPress was the only serious desktop publishing package in the game in the 1990s and into the early years of this century it could be found in every design studio and publishing house. There’s no iPad version yet, but you can open, edit and export Affinity Publisher documents in Affinity Designer for iPad and the iPad version of Affinity Photo. You can import InDesign files, as well as raster and vector files, and you get full preflight checking to alert you to any possible errors in your documents.Īffinity Publisher can be used as part of the Affinity suite of interoperable appsĪvailable for both Mac and PC, although not for Linux, Affinity Publisher can be used as part of the Affinity suite of interoperable apps, which includes the vector editor Affinity Designer (see our Affinity Designer review) and the image editor Affinity Photo), or simply on its own. It is only the publisher that you have given all this extra leeway to.Affinity Publisher has a similar interface and can manage most of what InDesign does, with impressive page layout tools for both print and digital media. (Observe, by the way, that the Completion arrives down the pipeline in good order at the expected moment - that is, the sink gets the Alpha value followed immediately by the. On the contrary, any expectation as to when cancellation would percolate up to the publisher is exactly what you gave up when you subscribed on the queue. The claim that "this call should not have happened" is thus wrong there is no "should have" in the story. So, as with any action on a queue, we now have no idea when that will actually happen. It says: if you subscribe on a certain queue, then that is the queue that will be used when/if the time comes for the cancellation message to be sent up the pipeline.īy choosing to subscribe on a specified queue, you are explicitly saying: when the time comes to cancel, queue that call. The quote from the documentation is not a statement about cancellation, it's a statement about threading. NameIterator.next() called with Delta // This call was unexpected. NameIterator.next() called with Charlie // This call was unexpected. subscribe(on: DispatchQueue(label: "BackgroundQueue")) Incorrectly Cancelled: let cancellable = NameIterator().publisher Print("NameIterator.next() called with \(names)")Ĭorrectly Cancelled: let cancellable = NameIterator().publisher Sample Iterator: struct NameIterator: Sequence, IteratorProtocol Is there a way to correctly cancel the upstream publisher? Or perhaps I'm incorrectly configuring the chain of Publishers. This causes a problem if the iterator is expensive and contains a large number of items, like traversing a filesystem. Note that sink is correctly called in both cases, but the iterator continues to get called even though no values are being pushed down the pipeline. However, if you call subscribe(on:), then the cancellation event does not reach the root publisher until it has exhausted calls to the iterator. If you subscribe to that publisher in a single thread, then any cancellation events are correctly propagated up to the root publisher and iteration stops. It's just simulating a custom iterator that might take a long time to fetch elements.Ĭombine adds a. In the example code below, I have a basic type NameIterator that conforms to Sequence and IteratorProtocol. ![]() It's not entirely clear to me what this statement implies. Perform cancel() using the specified scheduler. Using subscribe(on:options:) also causes the upstream publisher to The documentation for subscribe(on:options:) makes the following reference: ![]() I'm trying to take advantage of Combine's ability to subscribe to an upstream Publisher on a different queue but I'm finding that when I do, the upstream Publisher does not correctly get cancelled. ![]()
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