1 files changed, 63 insertions, 0 deletions
diff --git a/packages/DocumentsUI/src/com/android/documentsui/DirectoryView.java b/packages/DocumentsUI/src/com/android/documentsui/DirectoryView.java
new file mode 100644
index 0000000..34cb14f
--- /dev/null
+++ b/packages/DocumentsUI/src/com/android/documentsui/DirectoryView.java
@@ -0,0 +1,63 @@
+/*
+ * 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.documentsui;
+
+import android.content.Context;
+import android.graphics.Rect;
+import android.graphics.drawable.Drawable;
+import android.graphics.drawable.InsetDrawable;
+import android.util.AttributeSet;
+import android.widget.FrameLayout;
+
+public class DirectoryView extends FrameLayout {
+    private float mPosition = 0f;
+
+    private int mWidth;
+
+    public DirectoryView(Context context) {
+        super(context);
+    }
+
+    public DirectoryView(Context context, AttributeSet attrs) {
+        super(context, attrs);
+    }
+
+    @Override
+    public void setBackground(Drawable background) {
+        final Rect rect = new Rect();
+        background.getPadding(rect);
+        final InsetDrawable inset = new InsetDrawable(background, -rect.left, 0, 0, 0);
+        super.setBackground(inset);
+    }
+
+    @Override
+    protected void onSizeChanged(int w, int h, int oldw, int oldh) {
+        super.onSizeChanged(w, h, oldw, oldh);
+        mWidth = w;
+        setPosition(mPosition);
+    }
+
+    public float getPosition() {
+        return mPosition;
+    }
+
+    public void setPosition(float position) {
+        mPosition = position;
+        setX((mWidth > 0) ? (mPosition * mWidth) : 0);
+        setAlpha(1f - position);
+    }
+}