- From: Patrick H. Lauke via GitHub <sysbot+gh@w3.org>
- Date: Mon, 01 Aug 2016 14:09:46 +0000
- To: public-pointer-events@w3.org
Unless I'm missing something, this doesn't feel like a spec issue, but more a specific implementation (for the web content author, not UA authors)? Possibly related, in the WCAG/WAI Mobile Accessibility Task Force, we've been working on some accessibility-related advice for target sizes https://w3c.github.io/Mobile-A11y-Extension/ (this will, eventually, be rolled into WCAG 2.1 when it comes out) > Target Size: The size of the target in relation to the visible display at the default viewport size is at least: (Level AA) > - 44px by 44px for pointer inputs with coarse pointing accuracy (such as a touchscreen) > - 20px by 20px for pointer inputs with fine pointing accuracy (such as a mouse, trackpad or stylus) where px is a CSS pixel. > > Note: In situations where multiple input mechanisms with both coarse and fine pointing accuracy are present, and where no mechanisms are present to determine the user's current input (either manual - e.g. providing the user with an explicit toggle to switch to a "touch-optimized" interface - or automatic - e.g. an application switching dynamically based on the type of input the user is currently using), targets must follow the larger minimum dimensions for coarse pointer inputs. > > Note: This success criterion applies when platform assistive technology (e.g. magnification) is not turned on. > > Editor's Note: We are researching the 20px value for mouse/pointer and 44px for touch. We are seeking research on this and outside input. We also have to define the difference between a touch event and a mouse event, particularly in html and responsive environments. > > Editor's Note: this criterion borrows the distinction of "coarse" and "fine" pointing devices from [Media Queries Level 4 - Pointing Device Quality: the pointer feature](https://www.w3.org/TR/mediaqueries-4/#descdef-media-pointer) -- GitHub Notification of comment by patrickhlauke Please view or discuss this issue at https://github.com/w3c/pointerevents/issues/126#issuecomment-236591050 using your GitHub account
Received on Monday, 1 August 2016 14:11:51 UTC