| /* |
| * Copyright (C) 2015 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 android.support.design.internal; |
| |
| import android.content.Context; |
| import android.content.res.TypedArray; |
| import android.graphics.Canvas; |
| import android.graphics.Rect; |
| import android.graphics.drawable.Drawable; |
| import android.support.annotation.NonNull; |
| import android.support.design.R; |
| import android.support.v4.view.ViewCompat; |
| import android.support.v4.view.WindowInsetsCompat; |
| import android.util.AttributeSet; |
| import android.view.View; |
| import android.widget.FrameLayout; |
| |
| /** |
| * @hide |
| */ |
| public class ScrimInsetsFrameLayout extends FrameLayout { |
| |
| private Drawable mInsetForeground; |
| |
| private Rect mInsets; |
| |
| private Rect mTempRect = new Rect(); |
| |
| public ScrimInsetsFrameLayout(Context context) { |
| this(context, null); |
| } |
| |
| public ScrimInsetsFrameLayout(Context context, AttributeSet attrs) { |
| this(context, attrs, 0); |
| } |
| |
| public ScrimInsetsFrameLayout(Context context, AttributeSet attrs, int defStyleAttr) { |
| super(context, attrs, defStyleAttr); |
| |
| final TypedArray a = context.obtainStyledAttributes(attrs, |
| R.styleable.ScrimInsetsFrameLayout, defStyleAttr, |
| R.style.Widget_Design_ScrimInsetsFrameLayout); |
| mInsetForeground = a.getDrawable(R.styleable.ScrimInsetsFrameLayout_insetForeground); |
| a.recycle(); |
| setWillNotDraw(true); // No need to draw until the insets are adjusted |
| |
| ViewCompat.setOnApplyWindowInsetsListener(this, |
| new android.support.v4.view.OnApplyWindowInsetsListener() { |
| @Override |
| public WindowInsetsCompat onApplyWindowInsets(View v, |
| WindowInsetsCompat insets) { |
| if (null == mInsets) { |
| mInsets = new Rect(); |
| } |
| mInsets.set(insets.getSystemWindowInsetLeft(), |
| insets.getSystemWindowInsetTop(), |
| insets.getSystemWindowInsetRight(), |
| insets.getSystemWindowInsetBottom()); |
| onInsetsChanged(insets); |
| setWillNotDraw(mInsets.isEmpty() || mInsetForeground == null); |
| ViewCompat.postInvalidateOnAnimation(ScrimInsetsFrameLayout.this); |
| return insets.consumeSystemWindowInsets(); |
| } |
| }); |
| } |
| |
| @Override |
| public void draw(@NonNull Canvas canvas) { |
| super.draw(canvas); |
| |
| int width = getWidth(); |
| int height = getHeight(); |
| if (mInsets != null && mInsetForeground != null) { |
| int sc = canvas.save(); |
| canvas.translate(getScrollX(), getScrollY()); |
| |
| // Top |
| mTempRect.set(0, 0, width, mInsets.top); |
| mInsetForeground.setBounds(mTempRect); |
| mInsetForeground.draw(canvas); |
| |
| // Bottom |
| mTempRect.set(0, height - mInsets.bottom, width, height); |
| mInsetForeground.setBounds(mTempRect); |
| mInsetForeground.draw(canvas); |
| |
| // Left |
| mTempRect.set(0, mInsets.top, mInsets.left, height - mInsets.bottom); |
| mInsetForeground.setBounds(mTempRect); |
| mInsetForeground.draw(canvas); |
| |
| // Right |
| mTempRect.set(width - mInsets.right, mInsets.top, width, height - mInsets.bottom); |
| mInsetForeground.setBounds(mTempRect); |
| mInsetForeground.draw(canvas); |
| |
| canvas.restoreToCount(sc); |
| } |
| } |
| |
| @Override |
| protected void onAttachedToWindow() { |
| super.onAttachedToWindow(); |
| if (mInsetForeground != null) { |
| mInsetForeground.setCallback(this); |
| } |
| } |
| |
| @Override |
| protected void onDetachedFromWindow() { |
| super.onDetachedFromWindow(); |
| if (mInsetForeground != null) { |
| mInsetForeground.setCallback(null); |
| } |
| } |
| |
| protected void onInsetsChanged(WindowInsetsCompat insets) { |
| } |
| |
| } |