Blog
The week of Mac bugs
7/7/2016
This week has been mostly about making the Mac build of Scribe more polished. It's always lagged behind the Windows build. And now it's catching up fast:

1) HIViewSetFrame inside kEventControlDraw is bad

For many years I couldn't work out why some calls to HIViewSetFrame wouldn't work inside some application I was writing. It turns out that called that inside the kEventControlDraw callback is actually bad. It leaves lots of the controls half painted of showing the previous contents of the screen. And no amount of calling HIViewSetNeedsDisplay is going fix it. The compositor thinks the old position of the control is up to date and won't repaint it.

Ultimately if you find you need to move a control during the re-paint you have to send a message to yourself and do it after that particular repaint has finished.

2) Apple Event handling

After 4 years I finally found the reason why Lgi apps wouldn't respond to AppleEvents that were passed to them on startup. I answered my own stack overflow question today.

3) Editing the Application Menu

The Scribe Application menu, that sits between the Apple menu and File menu has never had the normal "About" and "Preferences" items. And while there is a lot of discussion on how to do that for Cocoa apps, there is little to no information for Carbon apps. And yes, Scribe is still a Carbon app, although it does use a bunch of modern APIs for text and so on. I tried mixing some Cocoa calls to get at the right menu, but that didn't work. Then after hours of searching the internet I finally stumbled on to a mailing list post that describes how to do it. So it seems it's possible, just really obscure.

Tags: mac carbon

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