| /* |
| * Copyright (C) 2012 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.gallery3d.filtershow.cache; |
| |
| import android.os.Handler; |
| import android.os.Handler.Callback; |
| import android.os.HandlerThread; |
| import android.os.Message; |
| import android.os.Process; |
| |
| public class DelayedPresetCache extends DirectPresetCache implements Callback { |
| private HandlerThread mHandlerThread = null; |
| |
| private final static int NEW_PRESET = 0; |
| private final static int COMPUTE_PRESET = 1; |
| |
| private Handler mProcessingHandler = null; |
| private final Handler mUIHandler = new Handler() { |
| @Override |
| public void handleMessage(Message msg) { |
| switch (msg.what) { |
| case NEW_PRESET: { |
| CachedPreset cache = (CachedPreset) msg.obj; |
| didCompute(cache); |
| break; |
| } |
| } |
| } |
| }; |
| |
| @Override |
| public boolean handleMessage(Message msg) { |
| switch (msg.what) { |
| case COMPUTE_PRESET: { |
| CachedPreset cache = (CachedPreset) msg.obj; |
| compute(cache); |
| Message uimsg = mUIHandler.obtainMessage(NEW_PRESET, cache); |
| mUIHandler.sendMessage(uimsg); |
| break; |
| } |
| } |
| return false; |
| } |
| |
| public DelayedPresetCache(ImageLoader loader, int size) { |
| super(loader, size); |
| mHandlerThread = new HandlerThread("ImageProcessing", Process.THREAD_PRIORITY_BACKGROUND); |
| mHandlerThread.start(); |
| mProcessingHandler = new Handler(mHandlerThread.getLooper(), this); |
| } |
| |
| @Override |
| protected void willCompute(CachedPreset cache) { |
| if (cache == null) { |
| return; |
| } |
| cache.setBusy(true); |
| Message msg = mProcessingHandler.obtainMessage(COMPUTE_PRESET, cache); |
| mProcessingHandler.sendMessage(msg); |
| } |
| } |