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RE: DHTML Style Guide - proposed behavior for Rich Text Editor

From: Victor Tsaran <vtsaran@yahoo-inc.com>
Date: Tue, 19 Feb 2008 16:48:14 -0800
To: "'Becky Gibson'" <Becky_Gibson@notesdev.ibm.com>, <wai-xtech@w3.org>
Message-ID: <015601c8735a$46aea280$c948480a@ds.corp.yahoo.com>

Hi Becky,
Sorry for jumping into this so late.
We are redesigning the rich-text editor for the Yahoo! User Interface
library and I wanted to bring some of our experiences to the table.
 See my comments below.

The first enabled toolbar button is in the tab order of the page. In left to
right languages this button will be the first enabled toolbar button
starting from the left.


With focus on a toolbar button left and right arrow keys navigate to the
enabled buttons in the toolbar. 
Disabled toolbar buttons are not in the navigation and do not receive focus.
This mimics the behavior of toolbars on the Mac.  

This is slightly incorrect as on the Mac all buttons and menus receive focus
when assistive technology is running, however, they do not if AT is not

I, therefore, suggest that by default all buttons should receive the focus,
but their state should be clearly communicated (disabled, grayed out etc).
The user needs to know if a particular control is inactive so they can
figure out the reason for this, e.g. the user meant to select the text for
bolding but they have not done so, thus the BOLD button is disabled to show
that this action canno be performed.

I don't know of any keyboard navigable toolbars in Windows applications.

For examples see any of the mainstream toolbars, such as AOL toolbar, Google
toolbar and Yahoo! toolbar. Also, MS office applications have very
keyboard-friendly toolbars.

There still needs to be discussion of the behavior of controls such as
comboboxes, dropdown menus and combobuttons included in toolbars. For
example, combobuttons currently have two tab stops - one for the default
action of the button and one for the dropdown portion of the button, how
should this be handled when the combobutton is in a toolbar? 

Do you mean split buttons? again, see Yahoo! toolbar for examples. We have
settled on SPACE bar activating default action while down arrow activating
context menu.
MSAA has a role of SPLITBUTTON while ARIA does not.
I have been arguing about this before so don't want to resurrect these
discussions here.


Becky Gibson
Web Accessibility Architect
IBM Emerging Internet Technologies
5 Technology Park Drive
Westford, MA 01886
Voice: 978 399-6101; t/l 333-6101
Email: gibsonb@us.ibm.com
blog: WebA11y

wai-xtech-request@w3.org wrote on 01/09/2008 03:26:09 PM:

> Hi Becky,
> Also the toolbar could use the only tab stop and then left and right
> could be used to navigate toolbar controls.
> Victor
> -----Original Message-----
> From: wai-xtech-request@w3.org [mailto:wai-xtech-request@w3.org] On
> Of Becky Gibson
> Sent: Wednesday, January 09, 2008 12:18 PM
> To: wai-xtech@w3.org
> Subject: DHTML Style Guide - proposed behavior for Rich Text Editor
> My action item from the January 8, 2008 DHTML Style Guide meeting was 
> to write up the behaviors for a Rich Text Editor Widget.
> The edit control is provided by the browser. The edit control provides
> keyboard support for navigating, adding, removing and selecting text 
> so that behavior is not defined by the DHTML Style Guide.  The browser
> also provide a keyboard mechanism for navigating into and out of the
> control.    Within Internet Explorer the edit control is put into the 
> order of the page and can be navigated into, out of, and through using
> tab and shift-tab keys like any standard form control.   Firefox also 
> the edit control into the tab order.  However, Firefox has actually 
> implemented tab as an action within the edit control so currently 
> there
> no keyboard way to navigate out of the editor component once focus has 
> been placed inside of it.
> A rich text editor widget needs to provide a user interface for 
> interacting with the browser provided edit control.  Interaction 
> between

> the user interface and editor is defined here assuming that a toolbar 
> is

> used. 
> If not provided by the browser, the rich text editor widget must 
> provide
> keyboard mechanism to move into and out of the edit control.  Tab and 
> shift-tab are the recommended keystrokes. This additional 
> implementation

> is necessary for Firefox until Firefox provides an alternative 
> keyboard mechanism to navigate out of the edit control.
> The toolbar or other user interface component associated with the 
> editor

> is placed in the tab order immediately before the editor.
> To set an attribute on text within the edit control the user sets 
> focus into the edit control, moves the insertion point, selects text 
> and
> shift-tab to move focus from the editor back to the toolbar.  The user 
> navigates through the toolbar (see toolbar behavior) to a desired 
> attribute and invokes that attribute.
> When an attribute is invoked, that attribute is applied to the 
> selected text in the editor and focus moves back into the editor at 
> the previous insertion point with the selection intact.
> Options: 
> Rather than using shift-tab to move focus from within the editor to 
> the toolbar, another key combination could be used (alt-up arrow, 
> ctrl-shift-letter, etc.).  This would eliminate the need to put the 
> user

> interface control, in this example a toolbar, into the tab order 
> immediately before the editor component.  However, there are drawbacks
> using a different keystroke to navigate to the user interface: 1) it 
> is not as "discoverable" as relying on the standard tab/shift-tab 
> behavior;

> 2) it is difficult to find key combinations which are not already
> by the browser or assistive technology. 
> Focus could stay within the toolbar after the user invokes an attribute. 

> The user would then have to press an additional key to move focus back 
> into the editor.  This would allow multiple attributes to be set on 
> the current selection without having to return back to the user 
> interface
> it would add an extra key sequence after setting just a single
>  Requiring a keystroke to move focus back into the editor would also 
> require modifying the toolbar behavior to intercept this keystroke and
> know how to set focus back to the component (the editor) that the
> is associated with. 
> Becky Gibson
> Web Accessibility Architect
> IBM Emerging Internet Technologies
> 5 Technology Park Drive
> Westford, MA 01886
> Voice: 978 399-6101; t/l 333-6101
> Email: gibsonb@us.ibm.com
> blog: WebA11y
Received on Wednesday, 20 February 2008 00:48:52 UTC

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