From 75deaf3d8f369bd13ea59ec3740324a5cfeb3099 Mon Sep 17 00:00:00 2001
From: Sunny Goyal <sunnygoyal@google.com>
Date: Thu, 7 May 2015 16:13:12 -0700
Subject: [PATCH] Using xml-drawable and elevation as folder background

Change-Id: I21376bd3de8cd58c646d0898d5a8303af9057218
---
 res/layout/user_folder.xml              |  2 +-
 res/values/dimens.xml                   |  9 +++++++--
 src/com/android/launcher3/DragView.java |  4 ++++
 src/com/android/launcher3/Folder.java   | 22 ++++++++++++++++++----
 4 files changed, 30 insertions(+), 7 deletions(-)

diff --git a/res/layout/user_folder.xml b/res/layout/user_folder.xml
index cd3a051ad2..5bacc96054 100644
--- a/res/layout/user_folder.xml
+++ b/res/layout/user_folder.xml
@@ -19,7 +19,7 @@
     xmlns:launcher="http://schemas.android.com/apk/res-auto"
     android:layout_width="wrap_content"
     android:layout_height="wrap_content"
-    android:background="@drawable/quantum_panel"
+    android:elevation="5dp"
     android:orientation="vertical" >
 
     <FrameLayout
diff --git a/res/values/dimens.xml b/res/values/dimens.xml
index 4fbe87e09e..5b5b5fc548 100644
--- a/res/values/dimens.xml
+++ b/res/values/dimens.xml
@@ -75,10 +75,14 @@
          or right while you're dragging. -->
     <dimen name="scroll_zone">20dp</dimen>
 
-    <!--  When dragging an item, how much bigger (fixed dps) the dragged view
-          should be. If 0, it will not be scaled at all. -->
+    <!-- When dragging an item, how much bigger (fixed dps) the dragged view
+         should be. If 0, it will not be scaled at all. -->
     <dimen name="dragViewScale">12dp</dimen>
 
+    <!-- Elevation for the drag view. It should be larger than elevation of all other drag sources
+         and drop targets like all-apps and folders -->
+    <dimen name="drag_elevation">30dp</dimen>
+
 <!-- Widget tray -->
     <dimen name="widget_container_inset">8dp</dimen>
     <dimen name="widget_preview_size">120dp</dimen>
@@ -107,6 +111,7 @@
     <!-- The amount that the preview contents are inset from the preview background -->
     <dimen name="folder_preview_padding">4dp</dimen>
     <dimen name="folder_name_padding">10dp</dimen>
+    <dimen name="folder_shadow_padding">8dp</dimen>
 
 <!-- Sizes for managed profile badges -->
     <dimen name="profile_badge_size">24dp</dimen>
diff --git a/src/com/android/launcher3/DragView.java b/src/com/android/launcher3/DragView.java
index a4b6704ac6..3eec3d9eee 100644
--- a/src/com/android/launcher3/DragView.java
+++ b/src/com/android/launcher3/DragView.java
@@ -129,6 +129,10 @@ public class DragView extends View {
         int ms = View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED);
         measure(ms, ms);
         mPaint = new Paint(Paint.FILTER_BITMAP_FLAG);
+
+        if (Utilities.isLmpOrAbove()) {
+            setElevation(getResources().getDimension(R.dimen.drag_elevation));
+        }
     }
 
     /** Sets the scale of the view over the normal workspace icon size. */
diff --git a/src/com/android/launcher3/Folder.java b/src/com/android/launcher3/Folder.java
index a2828054c6..d98b0eb6a2 100644
--- a/src/com/android/launcher3/Folder.java
+++ b/src/com/android/launcher3/Folder.java
@@ -27,6 +27,7 @@ import android.content.res.Resources;
 import android.graphics.Point;
 import android.graphics.PointF;
 import android.graphics.Rect;
+import android.graphics.drawable.InsetDrawable;
 import android.os.Build;
 import android.text.InputType;
 import android.text.Selection;
@@ -180,6 +181,15 @@ public class Folder extends LinearLayout implements DragSource, View.OnClickList
         // name is complete, we have something to focus on, thus hiding the cursor and giving
         // reliable behavior when clicking the text field (since it will always gain focus on click).
         setFocusableInTouchMode(true);
+
+        if (Utilities.isLmpOrAbove()) {
+            int padding = getResources().getDimensionPixelSize(R.dimen.folder_shadow_padding);
+            setBackground(new InsetDrawable(
+                    getResources().getDrawable(R.drawable.apps_list_bg),
+                    padding, padding, padding, padding));
+        } else {
+            setBackgroundResource(R.drawable.quantum_panel);
+        }
     }
 
     @Override
@@ -470,9 +480,15 @@ public class Folder extends LinearLayout implements DragSource, View.OnClickList
             PropertyValuesHolder tx = PropertyValuesHolder.ofFloat("translationX", transX, 0);
             PropertyValuesHolder ty = PropertyValuesHolder.ofFloat("translationY", transY, 0);
 
+            Animator drift = LauncherAnimUtils.ofPropertyValuesHolder(this, tx, ty);
+            drift.setDuration(mMaterialExpandDuration);
+            drift.setStartDelay(mMaterialExpandStagger);
+            drift.setInterpolator(new LogDecelerateInterpolator(100, 0));
+
             int rx = (int) Math.max(Math.max(width - getPivotX(), 0), getPivotX());
             int ry = (int) Math.max(Math.max(height - getPivotY(), 0), getPivotY());
             float radius = (float) Math.hypot(rx, ry);
+
             AnimatorSet anim = LauncherAnimUtils.createAnimatorSet();
             Animator reveal = LauncherAnimUtils.createCircularReveal(this, (int) getPivotX(),
                     (int) getPivotY(), 0, radius);
@@ -491,10 +507,6 @@ public class Folder extends LinearLayout implements DragSource, View.OnClickList
             textAlpha.setStartDelay(mMaterialExpandStagger);
             textAlpha.setInterpolator(new AccelerateInterpolator(1.5f));
 
-            Animator drift = LauncherAnimUtils.ofPropertyValuesHolder(this, tx, ty);
-            drift.setDuration(mMaterialExpandDuration);
-            drift.setStartDelay(mMaterialExpandStagger);
-            drift.setInterpolator(new LogDecelerateInterpolator(60, 0));
 
             anim.play(drift);
             anim.play(iconsAlpha);
@@ -504,10 +516,12 @@ public class Folder extends LinearLayout implements DragSource, View.OnClickList
             openFolderAnim = anim;
 
             mContentWrapper.setLayerType(LAYER_TYPE_HARDWARE, null);
+            mFooter.setLayerType(LAYER_TYPE_HARDWARE, null);
             onCompleteRunnable = new Runnable() {
                 @Override
                 public void run() {
                     mContentWrapper.setLayerType(LAYER_TYPE_NONE, null);
+                    mContentWrapper.setLayerType(LAYER_TYPE_NONE, null);
                 }
             };
         }