/*
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* Copyright (C) 2016 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License
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*/
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package com.android.systemui.statusbar.notification;
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import android.annotation.Nullable;
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import android.content.Context;
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import android.graphics.Outline;
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import android.util.AttributeSet;
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import android.view.View;
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import android.view.ViewGroup;
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import android.view.ViewOutlineProvider;
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import android.widget.LinearLayout;
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import com.android.systemui.R;
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import com.android.systemui.statusbar.AlphaOptimizedFrameLayout;
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/**
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* A view used to cast a shadow of a certain size on another view
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*/
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public class FakeShadowView extends AlphaOptimizedFrameLayout {
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public static final float SHADOW_SIBLING_TRESHOLD = 0.1f;
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private final int mShadowMinHeight;
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private View mFakeShadow;
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private float mOutlineAlpha;
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public FakeShadowView(Context context) {
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this(context, null);
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}
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public FakeShadowView(Context context, @Nullable AttributeSet attrs) {
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this(context, attrs, 0);
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}
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public FakeShadowView(Context context, @Nullable AttributeSet attrs, int defStyleAttr) {
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this(context, attrs, defStyleAttr, 0);
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}
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public FakeShadowView(Context context, @Nullable AttributeSet attrs, int defStyleAttr,
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int defStyleRes) {
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super(context, attrs, defStyleAttr, defStyleRes);
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mFakeShadow = new View(context);
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mFakeShadow.setVisibility(INVISIBLE);
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mFakeShadow.setLayoutParams(new LinearLayout.LayoutParams(
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ViewGroup.LayoutParams.MATCH_PARENT,
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(int) (48 * getResources().getDisplayMetrics().density)));
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mFakeShadow.setOutlineProvider(new ViewOutlineProvider() {
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@Override
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public void getOutline(View view, Outline outline) {
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outline.setRect(0, 0, getWidth(), mFakeShadow.getHeight());
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outline.setAlpha(mOutlineAlpha);
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}
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});
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addView(mFakeShadow);
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mShadowMinHeight = Math.max(1, context.getResources()
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.getDimensionPixelSize(R.dimen.notification_divider_height));
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}
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public void setFakeShadowTranslationZ(float fakeShadowTranslationZ, float outlineAlpha,
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int shadowYEnd, int outlineTranslation) {
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if (fakeShadowTranslationZ == 0.0f) {
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mFakeShadow.setVisibility(INVISIBLE);
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} else {
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mFakeShadow.setVisibility(VISIBLE);
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fakeShadowTranslationZ = Math.max(mShadowMinHeight, fakeShadowTranslationZ);
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mFakeShadow.setTranslationZ(fakeShadowTranslationZ);
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mFakeShadow.setTranslationX(outlineTranslation);
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mFakeShadow.setTranslationY(shadowYEnd - mFakeShadow.getHeight());
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if (outlineAlpha != mOutlineAlpha) {
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mOutlineAlpha = outlineAlpha;
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mFakeShadow.invalidateOutline();
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}
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}
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}
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}
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