diff options
author | Joe Onorato <joeo@android.com> | 2009-08-17 11:03:03 -0400 |
---|---|---|
committer | Joe Onorato <joeo@android.com> | 2009-08-24 14:58:44 -0400 |
commit | 9c1289cb3bfb74f86e53ec7ac6dd76bb39666b2d (patch) | |
tree | bb6f3ea57e53ccf695bd7cf2e3db33786506be5c /src/com/android/launcher2/DeferredHandler.java | |
parent | 02e638e6bf6dac903396a67029d4d48e3cfa87d9 (diff) | |
download | android_packages_apps_Trebuchet-9c1289cb3bfb74f86e53ec7ac6dd76bb39666b2d.tar.gz android_packages_apps_Trebuchet-9c1289cb3bfb74f86e53ec7ac6dd76bb39666b2d.tar.bz2 android_packages_apps_Trebuchet-9c1289cb3bfb74f86e53ec7ac6dd76bb39666b2d.zip |
Redo the launcher loading code and put the real app icons into rollo.
Diffstat (limited to 'src/com/android/launcher2/DeferredHandler.java')
-rw-r--r-- | src/com/android/launcher2/DeferredHandler.java | 104 |
1 files changed, 104 insertions, 0 deletions
diff --git a/src/com/android/launcher2/DeferredHandler.java b/src/com/android/launcher2/DeferredHandler.java new file mode 100644 index 000000000..433bf5599 --- /dev/null +++ b/src/com/android/launcher2/DeferredHandler.java @@ -0,0 +1,104 @@ +/* + * Copyright (C) 2008 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.launcher2; + +import android.os.Handler; +import android.os.Looper; +import android.os.Message; +import android.os.MessageQueue; +import android.util.Log; + +import java.util.LinkedList; + +/** + * Queue of things to run on a looper thread. Items posted with {@link #post} will not + * be actually enqued on the handler until after the last one has run, to keep from + * starving the thread. + * + * This class is fifo. + */ +public class DeferredHandler { + private LinkedList<Runnable> mQueue = new LinkedList(); + private MessageQueue mMessageQueue = Looper.myQueue(); + private Impl mHandler = new Impl(); + + private class Impl extends Handler implements MessageQueue.IdleHandler { + public void handleMessage(Message msg) { + Runnable r; + synchronized (mQueue) { + r = mQueue.removeFirst(); + } + r.run(); + synchronized (mQueue) { + scheduleNextLocked(); + } + } + + public boolean queueIdle() { + handleMessage(null); + return false; + } + } + + private class IdleRunnable implements Runnable { + Runnable mRunnable; + + IdleRunnable(Runnable r) { + mRunnable = r; + } + + public void run() { + mRunnable.run(); + } + } + + public DeferredHandler() { + } + + /** Schedule runnable to run after everything that's on the queue right now. */ + public void post(Runnable runnable) { + synchronized (mQueue) { + mQueue.add(runnable); + if (mQueue.size() == 1) { + scheduleNextLocked(); + } + } + } + + /** Schedule runnable to run when the queue goes idle. */ + public void postIdle(final Runnable runnable) { + post(new IdleRunnable(runnable)); + } + + public void cancel() { + synchronized (mQueue) { + mQueue.clear(); + } + } + + void scheduleNextLocked() { + if (mQueue.size() > 0) { + Runnable peek = mQueue.getFirst(); + if (peek instanceof IdleRunnable) { + mMessageQueue.addIdleHandler(mHandler); + } else { + mHandler.sendEmptyMessage(1); + } + } + } +} + |