| /* |
| * Copyright (C) 2014 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.recents.views; |
| |
| import android.content.Context; |
| import android.graphics.drawable.BitmapDrawable; |
| import android.graphics.drawable.Drawable; |
| import android.util.AttributeSet; |
| |
| import com.android.systemui.statusbar.AlphaOptimizedImageView; |
| |
| /** |
| * This is an optimized ImageView that does not trigger a <code>requestLayout()</code> or |
| * <code>invalidate()</code> when setting the image to <code>null</code>. |
| */ |
| public class FixedSizeImageView extends AlphaOptimizedImageView { |
| |
| private boolean mAllowRelayout = true; |
| private boolean mAllowInvalidate = true; |
| |
| public FixedSizeImageView(Context context) { |
| this(context, null); |
| } |
| |
| public FixedSizeImageView(Context context, AttributeSet attrs) { |
| this(context, attrs, 0); |
| } |
| |
| public FixedSizeImageView(Context context, AttributeSet attrs, int defStyleAttr) { |
| this(context, attrs, defStyleAttr, 0); |
| } |
| |
| public FixedSizeImageView(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) { |
| super(context, attrs, defStyleAttr, defStyleRes); |
| } |
| |
| @Override |
| public void requestLayout() { |
| if (mAllowRelayout) { |
| super.requestLayout(); |
| } |
| } |
| |
| @Override |
| public void invalidate() { |
| if (mAllowInvalidate) { |
| super.invalidate(); |
| } |
| } |
| |
| @Override |
| public void setImageDrawable(Drawable drawable) { |
| boolean isNullBitmapDrawable = (drawable instanceof BitmapDrawable) && |
| (((BitmapDrawable) drawable).getBitmap() == null); |
| if (drawable == null || isNullBitmapDrawable) { |
| mAllowRelayout = false; |
| mAllowInvalidate = false; |
| } |
| super.setImageDrawable(drawable); |
| mAllowRelayout = true; |
| mAllowInvalidate = true; |
| } |
| } |