1 files changed, 66 insertions, 0 deletions
diff --git a/java/src/com/android/inputmethod/keyboard/internal/ScrollViewWithNotifier.java b/java/src/com/android/inputmethod/keyboard/internal/ScrollViewWithNotifier.java
new file mode 100644
index 000000000..d1ccdc7b5
--- /dev/null
+++ b/java/src/com/android/inputmethod/keyboard/internal/ScrollViewWithNotifier.java
@@ -0,0 +1,66 @@
+/*
+ * Copyright (C) 2013 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.inputmethod.keyboard.internal;
+
+import android.content.Context;
+import android.util.AttributeSet;
+import android.widget.ScrollView;
+
+/**
+ * This is an extended {@link ScrollView} that can notify
+ * {@link ScrollView#onScrollChanged(int,int,int,int} and
+ * {@link ScrollView#onOverScrolled(int,int,int,int)} to a content view.
+ */
+public class ScrollViewWithNotifier extends ScrollView {
+    private ScrollListener mScrollListener = EMPTY_LISTER;
+
+    public interface ScrollListener {
+        public void notifyScrollChanged(int scrollX, int scrollY, int oldX, int oldY);
+        public void notifyOverScrolled(int scrollX, int scrollY, boolean clampedX,
+                boolean clampedY);
+    }
+
+    private static final ScrollListener EMPTY_LISTER = new ScrollListener() {
+        @Override
+        public void notifyScrollChanged(int scrollX, int scrollY, int oldX, int oldY) {}
+        @Override
+        public void notifyOverScrolled(int scrollX, int scrollY, boolean clampedX,
+                boolean clampedY) {}
+    };
+
+    public ScrollViewWithNotifier(final Context context, final AttributeSet attrs) {
+        super(context, attrs);
+    }
+
+    @Override
+    protected void onScrollChanged(final int scrollX, final int scrollY, final int oldX,
+            final int oldY) {
+        super.onScrollChanged(scrollX, scrollY, oldX, oldY);
+        mScrollListener.notifyScrollChanged(scrollX, scrollY, oldX, oldY);
+    }
+
+    @Override
+    protected void onOverScrolled(final int scrollX, final int scrollY, final boolean clampedX,
+            final boolean clampedY) {
+        super.onOverScrolled(scrollX, scrollY, clampedX, clampedY);
+        mScrollListener.notifyOverScrolled(scrollX, scrollY, clampedX, clampedY);
+    }
+
+    public void setScrollListener(final ScrollListener listener) {
+        mScrollListener = listener;
+    }
+}