Adding an option to change the shadow size

Change-Id: I8ec810c5cf06852771247af5f1d717f41079c4f5

res/drawable-v24/ic_info_shadow.xml

@@ -15,4 +15,5 @@
 -->
 <com.android.launcher3.graphics.ShadowDrawable
     xmlns:android="http://schemas.android.com/apk/res/android"
-    android:src="@drawable/ic_info_no_shadow" />
+    android:src="@drawable/ic_info_no_shadow"
+    android:elevation="@dimen/drop_target_shadow_elevation" />

res/drawable-v24/ic_remove_shadow.xml

@@ -15,4 +15,5 @@
 -->
 <com.android.launcher3.graphics.ShadowDrawable
     xmlns:android="http://schemas.android.com/apk/res/android"
-    android:src="@drawable/ic_remove_no_shadow" />
+    android:src="@drawable/ic_remove_no_shadow"
+    android:elevation="@dimen/drop_target_shadow_elevation" />

res/drawable-v24/ic_uninstall_shadow.xml

@@ -15,4 +15,5 @@
 -->
 <com.android.launcher3.graphics.ShadowDrawable
     xmlns:android="http://schemas.android.com/apk/res/android"
-    android:src="@drawable/ic_uninstall_no_shadow" />
+    android:src="@drawable/ic_uninstall_no_shadow"
+    android:elevation="@dimen/drop_target_shadow_elevation" />

res/values/attrs.xml

@@ -114,5 +114,6 @@
     <declare-styleable name="ShadowDrawable">
         <attr name="android:src" />
         <attr name="android:shadowColor" />
+        <attr name="android:elevation" />
     </declare-styleable>
 </resources>

res/values/dimens.xml

@@ -104,6 +104,7 @@
     <!-- Drag padding to add to the bottom of drop targets -->
     <dimen name="drop_target_drag_padding">14dp</dimen>
     <dimen name="drop_target_text_size">14sp</dimen>
+    <dimen name="drop_target_shadow_elevation">2dp</dimen>
 
     <!-- the distance an icon must be dragged before button drop targets accept it -->
     <dimen name="drag_distanceThreshold">30dp</dimen>
@@ -138,7 +139,6 @@
     <dimen name="blur_size_medium_outline">2dp</dimen>
     <dimen name="blur_size_click_shadow">4dp</dimen>
     <dimen name="click_shadow_high_shift">2dp</dimen>
-    <dimen name="drawable_shadow_size">4dp</dimen>
 
 <!-- Pending widget -->
     <dimen name="pending_widget_min_padding">8dp</dimen>

src/com/android/launcher3/graphics/ShadowDrawable.java

@@ -46,6 +46,7 @@ public class ShadowDrawable extends Drawable {
 
     private final ShadowDrawableState mState;
 
+    @SuppressWarnings("unused")
     public ShadowDrawable() {
         this(new ShadowDrawableState());
     }
@@ -98,17 +99,6 @@ public class ShadowDrawable extends Drawable {
         return mState.mIntrinsicWidth;
     }
 
-    /**
-     * Sets the color for the generated shadow
-     */
-    public void setShadowColor(int color) {
-        if (mState.mShadowColor != color) {
-            mState.mShadowColor = color;
-            mState.mLastDrawnBitmap = null;
-            invalidateSelf();
-        }
-    }
-
     private void regenerateBitmapCache() {
         Bitmap bitmap = Bitmap.createBitmap(mState.mIntrinsicWidth, mState.mIntrinsicHeight,
                 Bitmap.Config.ARGB_8888);
@@ -154,7 +144,8 @@ public class ShadowDrawable extends Drawable {
             }
             mState.mShadowColor = a.getColor(
                     R.styleable.ShadowDrawable_android_shadowColor, Color.BLACK);
-            mState.mShadowSize = r.getDimensionPixelSize(R.dimen.drawable_shadow_size);
+            mState.mShadowSize = a.getDimensionPixelSize(
+                    R.styleable.ShadowDrawable_android_elevation, 0);
 
             mState.mIntrinsicHeight = d.getIntrinsicHeight() + 2 * mState.mShadowSize;
             mState.mIntrinsicWidth = d.getIntrinsicWidth() + 2 * mState.mShadowSize;