Adding drop shadow effect in allapps

Change-Id: Ic7a9b6e23d925d27a8dcbd418d2609e43917ac45

res/layout/apps_grid_icon_view.xml

@@ -25,6 +25,5 @@
     android:paddingBottom="@dimen/apps_icon_top_bottom_padding"
     android:focusable="true"
     android:background="@drawable/focusable_view_bg"
-    launcher:deferShadowGeneration="true"
     launcher:iconDisplay="all_apps" />
 

res/layout/apps_list_view.xml

@@ -14,7 +14,8 @@
      See the License for the specific language governing permissions and
      limitations under the License.
 -->
-<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
+<com.android.launcher3.AppsRecyclerViewContainer
+    xmlns:android="http://schemas.android.com/apk/res/android"
     android:id="@+id/apps_list"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
@@ -101,4 +102,4 @@
             android:src="@drawable/ic_search_grey" />
     </FrameLayout>
 
-</FrameLayout>
+</com.android.launcher3.AppsRecyclerViewContainer>

res/layout/apps_prediction_bar_icon_view.xml

@@ -24,6 +24,5 @@
     android:layout_weight="1"
     android:focusable="true"
     android:background="@drawable/focusable_view_bg"
-    launcher:deferShadowGeneration="true"
     launcher:iconDisplay="all_apps" />
 

src/com/android/launcher3/AppsGridAdapter.java

@@ -1,3 +1,18 @@
+/*
+ * 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;
 
 import android.content.Context;

src/com/android/launcher3/AppsRecyclerViewContainer.java

@@ -0,0 +1,61 @@
+/*
+ * 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;
+
+import android.content.Context;
+import android.graphics.Bitmap;
+import android.util.AttributeSet;
+import android.view.ViewGroup;
+import android.widget.FrameLayout;
+
+import com.android.launcher3.BubbleTextView.BubbleTextShadowHandler;
+
+public class AppsRecyclerViewContainer extends FrameLayout implements BubbleTextShadowHandler {
+
+    private final ClickShadowView mTouchFeedbackView;
+
+    public AppsRecyclerViewContainer(Context context) {
+        this(context, null);
+    }
+
+    public AppsRecyclerViewContainer(Context context, AttributeSet attrs) {
+        this(context, attrs, 0);
+    }
+
+    public AppsRecyclerViewContainer(Context context, AttributeSet attrs, int defStyleAttr) {
+        super(context, attrs, defStyleAttr);
+
+        LauncherAppState app = LauncherAppState.getInstance();
+        DeviceProfile grid = app.getDynamicGrid().getDeviceProfile();
+
+        mTouchFeedbackView = new ClickShadowView(context);
+
+        // Make the feedback view large enough to hold the blur bitmap.
+        int size = grid.allAppsIconSizePx + mTouchFeedbackView.getExtraSize();
+        addView(mTouchFeedbackView, size, size);
+    }
+
+    @Override
+    public void setPressedIcon(BubbleTextView icon, Bitmap background) {
+        if (icon == null || background == null) {
+            mTouchFeedbackView.setBitmap(null);
+            mTouchFeedbackView.animate().cancel();
+        } else if (mTouchFeedbackView.setBitmap(background)) {
+            mTouchFeedbackView.alignWithIconView(icon, (ViewGroup) icon.getParent());
+            mTouchFeedbackView.animateShadow();
+        }
+    }
+}

src/com/android/launcher3/BubbleTextView.java

@@ -33,6 +33,7 @@ import android.util.TypedValue;
 import android.view.KeyEvent;
 import android.view.MotionEvent;
 import android.view.ViewConfiguration;
+import android.view.ViewParent;
 import android.widget.TextView;
 
 import com.android.launcher3.IconCache.IconLoadRequest;
@@ -274,9 +275,10 @@ public class BubbleTextView extends TextView {
         }
 
         // Only show the shadow effect when persistent pressed state is set.
-        if (getParent() instanceof ShortcutAndWidgetContainer) {
-            CellLayout layout = (CellLayout) getParent().getParent();
-            layout.setPressedIcon(this, mPressedBackground);
+        ViewParent parent = getParent();
+        if (parent != null && parent.getParent() instanceof BubbleTextShadowHandler) {
+            ((BubbleTextShadowHandler) parent.getParent()).setPressedIcon(
+                    this, mPressedBackground);
         }
 
         updateIconState();
@@ -509,4 +511,11 @@ public class BubbleTextView extends TextView {
             }
         }
     }
+
+    /**
+     * Interface to be implemented by the grand parent to allow click shadow effect.
+     */
+    public static interface BubbleTextShadowHandler {
+        void setPressedIcon(BubbleTextView icon, Bitmap background);
+    }
 }

src/com/android/launcher3/CellLayout.java

@@ -47,6 +47,7 @@ import android.view.ViewGroup;
 import android.view.accessibility.AccessibilityEvent;
 import android.view.animation.DecelerateInterpolator;
 
+import com.android.launcher3.BubbleTextView.BubbleTextShadowHandler;
 import com.android.launcher3.FolderIcon.FolderRingAnimator;
 import com.android.launcher3.accessibility.DragAndDropAccessibilityDelegate;
 import com.android.launcher3.accessibility.FolderAccessibilityHelper;
@@ -61,7 +62,7 @@ import java.util.Comparator;
 import java.util.HashMap;
 import java.util.Stack;
 
-public class CellLayout extends ViewGroup {
+public class CellLayout extends ViewGroup implements BubbleTextShadowHandler {
     public static final int WORKSPACE_ACCESSIBILITY_DRAG = 2;
     public static final int FOLDER_ACCESSIBILITY_DRAG = 1;
 
@@ -409,7 +410,8 @@ public class CellLayout extends ViewGroup {
         invalidate();
     }
 
-    void setPressedIcon(BubbleTextView icon, Bitmap background) {
+    @Override
+    public void setPressedIcon(BubbleTextView icon, Bitmap background) {
         if (icon == null || background == null) {
             mTouchFeedbackView.setBitmap(null);
             mTouchFeedbackView.animate().cancel();