> On Feb 15, 2017, at 7:18 AM, Bill Cheeseman <wjcheese...@comcast.net> wrote: > > After I switch to a different space, rows in one column of the browser view > do not become visible when I scroll the column vertically.
I figured out that the problem is a conceptual misfit between Mission Control and the way I was trying to make my application work. My application is UI Browser <http://pfiddlesoft.com/uibrowser <http://pfiddlesoft.com/uibrowser>>. Its browser view displays the Accessibility hierarchy of the UI elements in a selected target application. The second column always displays the open windows (and the menu bar) of the target application. It turns out that, if an application like the Finder has windows open in multiple Mission Control spaces, UI Browser's second column only displays the windows that are open in the current space. When I switch to another space, UI Browser can no longer access the windows in the original space. So when I scroll the second column, the now inaccessible windows' titles can't be displayed because UI Browser cannot find them. So, the next version of UI Browser (due soon) will refresh its view when the user switches spaces, so as to show only the windows that are accessible in the new space. This change will conform to the basic principle of macOS accessibility, which is that a Mac should only make visible to users with disabilities the same things that a sighted user can see, and a sighted user cannot see the windows in a space that is not currently visible. My Mac has the Mission Control preference "Displays have separate Spaces" turned OFF. For the case of people who have it turned on and use multiple monitors, I think I should probably also stop using NSWindowCollectionBehaviorCanJoinAllSpaces and use NSWindowCollectionBehaviorMoveToActiveSpace instead. I've been working with the macOS Accessibility API for 15 years now, and I'm still learning new stuff! -- Bill Cheeseman - wjcheese...@comcast.net _______________________________________________ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
