1. Some accessibility actions should not be performed on disabled
views. For example, scrolling should not be permitted while
accessibility focus should be. Made a quick pass over the
actions we expose now.
Change-Id: I36626dfbc0d2f480309a910f58f1de64e9e05675
1. The prefetcher of accessibility nodes infos was not folloing
the childForAccessibility relationship when finding the views
whose node infos to prefetch.
2. NumberPicker was not reporting the correct parent.
bug:6471710
Change-Id: Ia7ad5dd031fb4b3816dfe630d5212201cfafa236
1. Added support for accessibility scroll action to
some widgets that are scrollable.
2. Making the super call when handling an accessibility
action in the views to call super first to allow
an accessibility delegate to intercept the call.
bug:5932640
Change-Id: I5eb37d64bf9fba1d5c596981132e0df717e2a18a
1. Finished the implementation of support for maintaining
accessibility focus in view with virtual descendants.
2. Finished the NumberPicker implementation of virtual
subtree such that all requred attributes are reported
and ensuring that it support accessibility focus in
its virtual descentants.
3. Fixed a bug where if a predecessor of the view that is
accessiiblity focused is removed the accessibliity focus
host in ViewRootImpl is not cleared leading to a crash
when trying to draw the accessibility focus highlight.:
bug:6472646
bug:6433864
Change-Id: I3645642b87b4a26025c0b2ba9dfaad92d11a48f1
1. Now the views considered during the accessibility focus search
are the ones that would get accessibility focus when thovered
over. This way the user will get the same items i.e. feedback
if he touch explores the screen and uses focus traversal. This
is imperative for a good user experience.
2. Updated which focusables are considered when searching for access
focus in ViewGroup. Generally accessibility focus ignores focus
before/after descendants.
3. Implemented focus search strategy in AbsListView that will traverse
the items of the current list (and the stuff withing one item
before moving to the next) before continuing the search if
forward and backward accessibility focus direction.
4. View focus search stops at root namespace. This is not the right
way to prevent some stuff that is not supposed to get a focus in
a container for a specific state. Actually the addFocusables
for that container has to be overriden. Further this approach
leads to focus getting stuck. The accessibility focus ignores
root names space since we want to traverse the entire screen.
5. Fixed an bug in AccessibilityInteractionController which was not
starting to search from the root of a virtual node tree.
6. Fixed a couple of bugs in FocusFinder where it was possible to
get index out of bounds exception if the focusables list is empty.
bug:5932640
Change-Id: Ic3bdd11767a7d40fbb21f35dcd79a4746af784d4
Bug 6404882.
The supplied code in this bug sets up a table with 2 columns and then
tries to add a component in column 5. Earlier attempts to fix this
by 'doing what the user meeant' had unwanted side-effects. This CL is
intended to defend against all ways to register invalid LayoutParams
and throw IllegalArgumentExcpetion when any column index falls outside the
range [0 .. N] where N is the number of columns. It also includes the
symmetrical check for rows.
Change-Id: I958a6d16035889cd954b78108773426e8b6b6d95
* moved View#isVisibleToUser to protected with @hide
* added a new View#isVisibleToUser(Rect), so that a portion of
the view can be tested for visibility
* NumberPicker will report its concrete class name
* code to append virtual children was at wrong place
* boundInScreen for increment and decrement buttons are reported
wrong
Change-Id: Ic5d644b3e1efa15b1f0537907c8cdd4ce43a97c1
1. Fixed errors in the accessibility node cache.
A. The cache was not catching the case when the current window changes as a
result the user touch exploring it. As a result the cache had nodes from
more that one window but the node ids are not unique thus causing a mess.
B. The node info tree was prefetched regardless if a prefetched node is root
name space (i.e. view ids - not accessibility ids - are namespaced) while
the prefetched nodes were taking this into account. As a result there can
get disconnected subtrees in the cache.
C. When an event for a property change such as focus was received the cache
we were removing the source node. As a result there may be disconnected nodes.
D. When a node was added to the cache and an older version exists there was
no check if it will point to the same children and parent. As a result if
the state of the node has fewer children the subtrees rooted at the no
longer present children will stay disconnected in the cache.
E. When a node got accessibility or input focus the old one in the cache was
not removed. As a result you may have a state with more than one access
or input focus.
2. Added integrity check enabled only on user builds when a specific flag is set
for the cache which checks whether:
A. All nodes are from the same window.
B. All nodes are connected.
C. There are no duplicates.
D. There is only one input focus.
E. There is only one accessibility focus.
3. The reported accessibility node info tree was stopping at the root namespace
boundary which is not correct. The reported tree has to reflect everything
on the screen that the user can see such a workspace with widgets. The root
namespace is added to avoid clash of view id but the accessibility ids are
unique no matter if the view is inflated from a remote view.
4. Added calls to notify the accessibility layer when a preoprty that is interesting
for accessibiliy has changed.
bug:6471710
Change-Id: I069470d91f209ba16313fa6539787a55efa3512e
Use View transient state tracking to allow selection to persist across
ListView-style item view recycling.
Fix some bugs with transient state tracking.
Bug 6110122
Change-Id: Ic084b8fc2289bff718b19478a37ce64459b3ed4c
1. Now the spinners in the time and data picker a wider therefore
easier to interact with, i.e. harder to miss accidentall.
2. Removed the scroll distance cut off user to distinguish between
fling and change by one.
3. Added visual feedback when the areas the serve as virtual buttons
in number picker are poked.
4. Removed the coeffcient that was making drap not to be one-to-one
with the scrolled distance.
5. Added some margin at the top and bottom of the spinners in
date and time pickers.
bug:6321432
Change-Id: I311c1733d1951b0563209401faa830ca70ec87cb
1. Scrolling actions are crucial for enabling a gesture based
traversal of the UI and specifically scrollable containers
especially lists and anything backed by an adapter. Since
accessibility focus can land only attached views, it cannot
visit views for adapter items not shown on the screen.
Auto scrolling the list as a result of putting access focus
ot a list item does not work well since the user may get
trapped in a long list. Adding an accessibility node provider
to emit virtual views for one view before the first and one
after the last is complex and suffers the limitation of trapping
the user. Accessibility service need an explicit scroll actions
which may be performed upon an explicit user action. Hence,
the user is informed for the start/end of the visible part of
the list and he makes a deliberate choice to scroll. This will
benefit also people developing Braille devices since they can
scroll the content without telling the user to stop using the
Braille controller and take the device out of his pocket to scroll
and go back to the Braille controller.
NOTE: Without these action large portions of the screen will be
hard to access since users will have to touch and explore to
find and scroll the list.
Change-Id: Iafcf54d4967893205872b3649025a4e347a299ed
