Separating double shadow logic for BubbleTextView in a separate subclass

This allows better customization and reuse of the double shadow logic and simplified
various attribute management

Change-Id: I5e277d8399756385452d8bb8c0a0107234a76d34

1 files changed, 97 insertions, 0 deletions

diff --git a/src/com/android/launcher3/views/DoubleShadowBubbleTextView.java b/src/com/android/launcher3/views/DoubleShadowBubbleTextView.java
new file mode 100644
index 000000000..9c8457afc
--- /dev/null
+++ b/src/com/android/launcher3/views/DoubleShadowBubbleTextView.java
@@ -0,0 +1,97 @@
+/*
+ * Copyright (C) 2017 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.views;
+
+import android.content.Context;
+import android.content.res.TypedArray;
+import android.graphics.Canvas;
+import android.graphics.Region;
+import android.util.AttributeSet;
+
+import com.android.launcher3.BubbleTextView;
+import com.android.launcher3.R;
+
+/**
+ * Extension of {@link BubbleTextView} which draws two shadows on the text (ambient and key shadows}
+ */
+public class DoubleShadowBubbleTextView extends BubbleTextView {
+
+    private final ShadowInfo mShadowInfo;
+
+    public DoubleShadowBubbleTextView(Context context) {
+        this(context, null);
+    }
+
+    public DoubleShadowBubbleTextView(Context context, AttributeSet attrs) {
+        this(context, attrs, 0);
+    }
+
+    public DoubleShadowBubbleTextView(Context context, AttributeSet attrs, int defStyle) {
+        super(context, attrs, defStyle);
+        mShadowInfo = new ShadowInfo(context, attrs, defStyle);
+        setShadowLayer(mShadowInfo.ambientShadowBlur, 0, 0, mShadowInfo.ambientShadowColor);
+    }
+    @Override
+    public void onDraw(Canvas canvas) {
+        // If text is transparent, don't draw any shadow
+        if ((getCurrentTextColor() >> 24) == 0) {
+            getPaint().clearShadowLayer();
+            super.onDraw(canvas);
+            return;
+        }
+
+        // We enhance the shadow by drawing the shadow twice
+        getPaint().setShadowLayer(
+                mShadowInfo.ambientShadowBlur, 0, 0, mShadowInfo.ambientShadowColor);
+
+        drawWithoutBadge(canvas);
+        canvas.save(Canvas.CLIP_SAVE_FLAG);
+        canvas.clipRect(getScrollX(), getScrollY() + getExtendedPaddingTop(),
+                getScrollX() + getWidth(),
+                getScrollY() + getHeight(), Region.Op.INTERSECT);
+
+        getPaint().setShadowLayer(mShadowInfo.keyShadowBlur, 0.0f,
+                mShadowInfo.keyShadowOffset, mShadowInfo.keyShadowColor);
+        drawWithoutBadge(canvas);
+        canvas.restore();
+
+        drawBadgeIfNecessary(canvas);
+    }
+
+    public static class ShadowInfo {
+        public final float ambientShadowBlur;
+        public final int ambientShadowColor;
+
+        public final float keyShadowBlur;
+        public final float keyShadowOffset;
+        public final int keyShadowColor;
+
+        public ShadowInfo(Context c, AttributeSet attrs, int defStyle) {
+
+            TypedArray a = c.obtainStyledAttributes(
+                    attrs, R.styleable.ShadowInfo, defStyle, 0);
+
+            ambientShadowBlur = a.getDimension(R.styleable.ShadowInfo_ambientShadowBlur, 0);
+            ambientShadowColor = a.getColor(R.styleable.ShadowInfo_ambientShadowColor, 0);
+
+            keyShadowBlur = a.getDimension(R.styleable.ShadowInfo_keyShadowBlur, 0);
+            keyShadowOffset = a.getDimension(R.styleable.ShadowInfo_keyShadowOffset, 0);
+            keyShadowColor = a.getColor(R.styleable.ShadowInfo_keyShadowColor, 0);
+            a.recycle();
+        }
+    }
+}