Added AppInfoDropTargetBar to spring loaded workspace.

Change-Id: Ieedc68eba9a5934ab30d6d546d8a837274491064
diff --git a/src/com/android/launcher3/AppInfoDropTargetBar.java b/src/com/android/launcher3/AppInfoDropTargetBar.java
new file mode 100644
index 0000000..31ff42a
--- /dev/null
+++ b/src/com/android/launcher3/AppInfoDropTargetBar.java
@@ -0,0 +1,74 @@
+/*
+ * Copyright (C) 2011 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;
+
+import android.content.Context;
+import android.util.AttributeSet;
+
+import com.android.launcher3.dragndrop.DragController;
+
+public class AppInfoDropTargetBar extends BaseDropTargetBar {
+    private ButtonDropTarget mAppInfoDropTarget;
+
+    public AppInfoDropTargetBar(Context context, AttributeSet attrs) {
+        this(context, attrs, 0);
+    }
+
+    public AppInfoDropTargetBar(Context context, AttributeSet attrs, int defStyle) {
+        super(context, attrs, defStyle);
+    }
+
+    @Override
+    protected void onFinishInflate() {
+        super.onFinishInflate();
+
+        // Get the individual components
+        mAppInfoDropTarget = (ButtonDropTarget) mDropTargetBar.findViewById(R.id.info_target_text);
+
+        mAppInfoDropTarget.setDropTargetBar(this);
+    }
+
+    @Override
+    public void setup(Launcher launcher, DragController dragController) {
+        dragController.addDragListener(this);
+
+        dragController.addDragListener(mAppInfoDropTarget);
+
+        dragController.addDropTarget(mAppInfoDropTarget);
+
+        mAppInfoDropTarget.setLauncher(launcher);
+    }
+
+    @Override
+    public void showDropTarget() {
+        animateDropTargetBarToAlpha(1f, DEFAULT_DRAG_FADE_DURATION);
+    }
+
+    @Override
+    public void hideDropTarget() {
+        animateDropTargetBarToAlpha(0f, DEFAULT_DRAG_FADE_DURATION);
+    }
+
+    private void animateDropTargetBarToAlpha(float alpha, int duration) {
+        animateViewAlpha(mDropTargetBarAnimator, mDropTargetBar, alpha,duration);
+    }
+
+    @Override
+    public void enableAccessibleDrag(boolean enable) {
+        mAppInfoDropTarget.enableAccessibleDrag(enable);
+    }
+}