| /* |
| * Copyright (C) 2016 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.systemui.statusbar.notification; |
| |
| import android.annotation.Nullable; |
| import android.content.Context; |
| import android.graphics.Outline; |
| import android.util.AttributeSet; |
| import android.view.View; |
| import android.view.ViewGroup; |
| import android.view.ViewOutlineProvider; |
| import android.widget.LinearLayout; |
| |
| import com.android.systemui.R; |
| import com.android.systemui.statusbar.AlphaOptimizedFrameLayout; |
| |
| /** |
| * A view used to cast a shadow of a certain size on another view |
| */ |
| public class FakeShadowView extends AlphaOptimizedFrameLayout { |
| public static final float SHADOW_SIBLING_TRESHOLD = 0.1f; |
| private final int mShadowMinHeight; |
| |
| private View mFakeShadow; |
| private float mOutlineAlpha; |
| |
| public FakeShadowView(Context context) { |
| this(context, null); |
| } |
| |
| public FakeShadowView(Context context, @Nullable AttributeSet attrs) { |
| this(context, attrs, 0); |
| } |
| |
| public FakeShadowView(Context context, @Nullable AttributeSet attrs, int defStyleAttr) { |
| this(context, attrs, defStyleAttr, 0); |
| } |
| |
| public FakeShadowView(Context context, @Nullable AttributeSet attrs, int defStyleAttr, |
| int defStyleRes) { |
| super(context, attrs, defStyleAttr, defStyleRes); |
| mFakeShadow = new View(context); |
| mFakeShadow.setVisibility(INVISIBLE); |
| mFakeShadow.setLayoutParams(new LinearLayout.LayoutParams( |
| ViewGroup.LayoutParams.MATCH_PARENT, |
| (int) (48 * getResources().getDisplayMetrics().density))); |
| mFakeShadow.setOutlineProvider(new ViewOutlineProvider() { |
| @Override |
| public void getOutline(View view, Outline outline) { |
| outline.setRect(0, 0, getWidth(), mFakeShadow.getHeight()); |
| outline.setAlpha(mOutlineAlpha); |
| } |
| }); |
| addView(mFakeShadow); |
| mShadowMinHeight = Math.max(1, context.getResources() |
| .getDimensionPixelSize(R.dimen.notification_divider_height)); |
| } |
| |
| public void setFakeShadowTranslationZ(float fakeShadowTranslationZ, float outlineAlpha, |
| int shadowYEnd, int outlineTranslation) { |
| if (fakeShadowTranslationZ == 0.0f) { |
| mFakeShadow.setVisibility(INVISIBLE); |
| } else { |
| mFakeShadow.setVisibility(VISIBLE); |
| fakeShadowTranslationZ = Math.max(mShadowMinHeight, fakeShadowTranslationZ); |
| mFakeShadow.setTranslationZ(fakeShadowTranslationZ); |
| mFakeShadow.setTranslationX(outlineTranslation); |
| mFakeShadow.setTranslationY(shadowYEnd - mFakeShadow.getHeight()); |
| if (outlineAlpha != mOutlineAlpha) { |
| mOutlineAlpha = outlineAlpha; |
| mFakeShadow.invalidateOutline(); |
| } |
| } |
| } |
| } |