/* * Copyright 2016 Jake Wharton * * 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.jakewharton.behavior.drawer; import android.annotation.SuppressLint; import android.annotation.TargetApi; import android.graphics.Canvas; import android.graphics.Paint; import android.graphics.drawable.ColorDrawable; import android.os.Build; import android.support.design.widget.CoordinatorLayout; import android.support.design.widget.CoordinatorLayout.LayoutParams; import android.view.View; import static android.view.ViewGroup.LayoutParams.MATCH_PARENT; interface ContentScrimDrawer { void setColor(int color); void setBounds(int left, int top, int right, int bottom); void setVisible(boolean gone); @TargetApi(Build.VERSION_CODES.JELLY_BEAN_MR2) final class JellyBeanMr2 extends ColorDrawable implements ContentScrimDrawer { private final View parent; private boolean visible; JellyBeanMr2(CoordinatorLayout parent) { this.parent = parent; } @Override public void setVisible(boolean visible) { if (this.visible != visible) { if (visible) { parent.getOverlay().add(this); } else { parent.getOverlay().remove(this); } this.visible = visible; } } } @SuppressLint("ViewConstructor") // Created only programmatically. final class Base extends View implements ContentScrimDrawer { private final Paint colorPaint = new Paint(); private int left; private int top; private int right; private int bottom; private boolean visible; Base(CoordinatorLayout parent, View child) { super(parent.getContext()); // Draw at the same level of the child. parent.addView(this, parent.indexOfChild(child), new LayoutParams(MATCH_PARENT, MATCH_PARENT)); } @Override protected void onDraw(Canvas canvas) { canvas.drawRect(left, top, right, bottom, colorPaint); } @Override public void setColor(int color) { colorPaint.setColor(color); invalidate(left, top, right, bottom); } @Override public void setBounds(int left, int top, int right, int bottom) { this.left = left; this.top = top; this.right = right; this.bottom = bottom; invalidate(left, top, right, bottom); } @Override public void setVisible(boolean visible) { if (this.visible != visible) { setVisibility(visible ? VISIBLE : INVISIBLE); this.visible = visible; } } } }