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Commit d4e6b2aa authored by Taran Singh's avatar Taran Singh Committed by Prabir Pradhan
Browse files

Add an input feature for a stylus interceptor 

A stylus interceptor is a window that receives all stylus events within
its touchable bounds, while letting all other events be dispatched to
windows behind it. This makes it possible for the framework to create a
stylus interceptor on top of another app to implement handwriting
recognition.

The feature has no effect when the window flag FLAG_NOT_TOUCHABLE is
not set.

The feature has no effect when the window is not a trusted overlay.

Test: manual
Change-Id: Ia481ee8d831643bc99445b47659a7f5e9875c388
parent f62ba689

core/java/android/view/WindowManager.java

+18 −0
Original line number Diff line number Diff line
@@ -3363,6 +3363,22 @@ public interface WindowManager extends ViewManager { 
         */

        public static final int INPUT_FEATURE_SPY = 0x00000020;



        /**

         * When used with the window flag {@link #FLAG_NOT_TOUCHABLE}, this window will continue

         * to receive events from a stylus device within its touchable region. All other pointer

         * events, such as from a mouse or touchscreen, will be dispatched to the windows behind it.

         *

         * This input feature has no effect when the window flag {@link #FLAG_NOT_TOUCHABLE} is

         * not set.

         *

         * The window must be a trusted overlay to use this input feature.

         *

         * @see #FLAG_NOT_TOUCHABLE

         *

         * @hide

         */

        public static final int INPUT_FEATURE_INTERCEPTS_STYLUS = 0x00000040;



        /**

         * An internal annotation for flags that can be specified to {@link #inputFeatures}.

         *
@@ -3373,6 +3389,7 @@ public interface WindowManager extends ViewManager { 
            INPUT_FEATURE_DISABLE_POINTER_GESTURES,

            INPUT_FEATURE_NO_INPUT_CHANNEL,

            INPUT_FEATURE_DISABLE_USER_ACTIVITY,

            INPUT_FEATURE_INTERCEPTS_STYLUS,

        })

        public @interface InputFeatureFlags {}
@@ -3382,6 +3399,7 @@ public interface WindowManager extends ViewManager { 
         * @see #INPUT_FEATURE_DISABLE_POINTER_GESTURES

         * @see #INPUT_FEATURE_NO_INPUT_CHANNEL

         * @see #INPUT_FEATURE_DISABLE_USER_ACTIVITY

         * @see #INPUT_FEATURE_INTERCEPTS_STYLUS

         * @hide

         */

        @InputFeatureFlags