98 lines
2.9 KiB
Java
98 lines
2.9 KiB
Java
/*
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* Copyright 2015 Hippo Seven
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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.hippo.widget;
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import android.content.Context;
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import android.graphics.Canvas;
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import android.graphics.Rect;
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import android.graphics.drawable.NinePatchDrawable;
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import android.os.Build;
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import android.util.AttributeSet;
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import android.view.ViewOutlineProvider;
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import android.widget.LinearLayout;
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import androidx.annotation.NonNull;
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import com.hippo.ehviewer.R;
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import com.hippo.yorozuya.LayoutUtils;
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public class ShadowLinearLayout extends LinearLayout {
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private final Rect mShadowPaddings = new Rect();
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private NinePatchDrawable mShadow;
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public ShadowLinearLayout(Context context) {
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super(context);
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init(context);
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}
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public ShadowLinearLayout(Context context, AttributeSet attrs) {
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super(context, attrs);
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init(context);
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}
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public ShadowLinearLayout(Context context, AttributeSet attrs, int defStyleAttr) {
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super(context, attrs, defStyleAttr);
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init(context);
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}
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private void init(Context context) {
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// TODO not only 2dp
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if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
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setOutlineProvider(ViewOutlineProvider.BOUNDS);
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setElevation(LayoutUtils.dp2pix(context, 2));
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} else {
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setShadow((NinePatchDrawable) context.getResources().getDrawable(R.drawable.shadow_2dp)); // TODO draktheme
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}
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}
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private void setShadow(NinePatchDrawable shadow) {
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mShadow = shadow;
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mShadow.getPadding(mShadowPaddings);
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updateShadowBounds();
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setWillNotDraw(false);
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}
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private void updateShadowBounds() {
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NinePatchDrawable shadow = mShadow;
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if (shadow == null) {
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return;
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}
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int width = getWidth();
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int height = getHeight();
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Rect paddings = mShadowPaddings;
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if (width != 0 && height != 0) {
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shadow.setBounds(-paddings.left, -paddings.top, width + paddings.right, height + paddings.bottom);
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}
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}
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@Override
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protected void onLayout(boolean changed, int left, int top, int right, int bottom) {
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super.onLayout(changed, left, top, right, bottom);
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updateShadowBounds();
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}
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@Override
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public void draw(@NonNull Canvas canvas) {
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if (mShadow != null) {
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mShadow.draw(canvas);
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}
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super.draw(canvas);
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}
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}
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