1 files changed, 57 insertions, 0 deletions
diff --git a/src/com/android/launcher3/accessibility/DragViewStateAnnouncer.java b/src/com/android/launcher3/accessibility/DragViewStateAnnouncer.java
new file mode 100644
index 000000000..b5e6194a0
--- /dev/null
+++ b/src/com/android/launcher3/accessibility/DragViewStateAnnouncer.java
@@ -0,0 +1,57 @@
+/*
+ * Copyright (C) 2015 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.launcher3.accessibility;
+
+import android.content.Context;
+import android.view.View;
+import android.view.accessibility.AccessibilityEvent;
+import android.view.accessibility.AccessibilityManager;
+
+/**
+ * Periodically sends accessibility events to announce ongoing state changed. Based on the
+ * implementation in ProgressBar.
+ */
+public class DragViewStateAnnouncer implements Runnable {
+
+    private static final int TIMEOUT_SEND_ACCESSIBILITY_EVENT = 200;
+
+    private final View mTargetView;
+
+    private DragViewStateAnnouncer(View view) {
+        mTargetView = view;
+    }
+
+    public void announce(CharSequence msg) {
+        mTargetView.setContentDescription(msg);
+        mTargetView.removeCallbacks(this);
+        mTargetView.postDelayed(this, TIMEOUT_SEND_ACCESSIBILITY_EVENT);
+    }
+
+    @Override
+    public void run() {
+        mTargetView.sendAccessibilityEvent(AccessibilityEvent.TYPE_VIEW_SELECTED);
+    }
+
+    public static DragViewStateAnnouncer createFor(View v) {
+        if (((AccessibilityManager) v.getContext().getSystemService(Context.ACCESSIBILITY_SERVICE))
+                .isEnabled()) {
+            return new DragViewStateAnnouncer(v);
+        } else {
+            return null;
+        }
+    }
+}