Re: Focus Rings
Re: Focus Rings
- Subject: Re: Focus Rings
- From: Ricky Sharp <email@hidden>
- Date: Mon, 9 Jul 2007 20:53:48 -0500
On Jul 9, 2007, at 8:16 PM, Keith Duncan wrote:
I've been working on more custom controls and wasn't sure when it
is appropriate to draw a focus ring. Is it just when the control
accepts keyboard input? I suspect it is but I've searched the HIG
which didn't help much.
Perhaps someone could point me to a link that covers focus rings.
For all my custom controls, I implement acceptsFirstResponder,
needsPanelToBecomeKey and canBecomeKeyView:
- (BOOL)acceptsFirstResponder
{
return YES; // I always return yes here
}
- (BOOL)canBecomeKeyView
{
return [self isEnabled]; // Conditionally return YES (based upon
certain criteria)
}
- (BOOL)needsPanelToBecomeKey
{
return <some flag>
}
For the last API, I only return YES if the control will always accept
keyboard input regardless of whether or not full keyboard access is
enabled. For example, lists and edit fields.
In the control's cell, I then draw the focus ring if
showsFirstResponder returns YES.
And, in IB, I always wire up all participating controls in the
keyboard loop.
This simple setup does the right thing whether or not full keyboard
access is enabled. And, if accessibility is important to you, it
will lay part of the foundation for stuff like VoiceOver's "keyboard
focus tracks VoiceOver cursor" feature.
___________________________________________________________
Ricky A. Sharp mailto:email@hidden
Instant Interactive(tm) http://www.instantinteractive.com
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| | >Focus Rings (From: Keith Duncan <email@hidden>) |