Re: NSControl subclass and accessibility
Re: NSControl subclass and accessibility
- Subject: Re: NSControl subclass and accessibility
- From: Rob Petrovec via Cocoa-dev <email@hidden>
- Date: Sun, 13 Mar 2022 10:31:43 -0600
Accessibility for NSControls is handled by the NSCell inside it, not the
NSControl. Good luck.
—Rob
> On Mar 13, 2022, at 7:55 AM, Eyal Redler via Cocoa-dev
> <email@hidden> wrote:
>
> Hi,
>
> I'm having trouble getting a custom NSControl subclass properly visible with
> regards to accessibility.
>
> If I implement my custom control as an NSView subclass and adopt the
> NSAccessibilityButton protocol, I can "see" my custom control with
> accessibility inspector when I hover above it.
> If I take the same class but make it a subclass of NSControl, I'm not able to
> "see" my control using accessibility inspector when hovering above it. It is
> detecting something because I can see that when I hover in the containing
> view, I can see the window ui element, but when I hover above the control
> itself, I'm only seeing the "app" element. Also, when I inspect the
> containing view I can see my control listed there and I can access it and
> perform the action.
>
> I feel like I'm missing something obvious. Any ideas?
>
> Here's my code, If I replace NSControl with NSView, it seems to work great.
>
> @interface MyFancyButton : NSControl <NSAccessibilityButton>
>
> @end
>
> @implementation MyFancyButton
> - (void)drawRect:(NSRect)dirtyRect ...
>
> - (void)mouseDown:(NSEvent *)event ...
>
> - (void)simulateClick ...
>
>
> - (nullable NSString *)accessibilityLabel
> {
> return @"my_label";
> }
> - (BOOL)accessibilityPerformPress
> {
> [self simulateClick];
> return YES;
> }
> @end
>
> Thanks in advance,
>
>
>
>
> Eyal Redler
> ------------------------------------------------------------------------------------------------
> "If Uri Geller bends spoons with divine powers, then he's doing it the hard
> way."
> --James Randi
> www.eyalredler.com
>
>
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