Drop new focus indicator into Camera2.

* Create a new custom focus view that interacts with physical lens diopter changes.
* Replace all occurances of the old focus indicator with the new one.

Change-Id: Ia02646ce4d1eb059ecb8a1dfccc15dfc9c167e1b

2 files changed, 84 insertions, 0 deletions

diff --git a/src/com/android/camera/async/HandlerExecutor.java b/src/com/android/camera/async/HandlerExecutor.java
new file mode 100644
index 000000000..87c8c0ce0
--- /dev/null
+++ b/src/com/android/camera/async/HandlerExecutor.java
@@ -0,0 +1,37 @@
+/*
+ * 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.camera.async;
+
+import java.util.concurrent.Executor;
+
+import android.os.Handler;
+
+/**
+ * An {@link Executor} which posts to a {@link Handler}.
+ */
+public class HandlerExecutor implements Executor {
+    private final Handler mHandler;
+
+    public HandlerExecutor(Handler handler) {
+        mHandler = handler;
+    }
+
+    @Override
+    public void execute(Runnable runnable) {
+        mHandler.post(runnable);
+    }
+}
diff --git a/src/com/android/camera/async/MainThread.java b/src/com/android/camera/async/MainThread.java
new file mode 100644
index 000000000..7fdb3ec9b
--- /dev/null
+++ b/src/com/android/camera/async/MainThread.java
@@ -0,0 +1,47 @@
+/*
+ * 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.camera.async;
+
+import android.os.Handler;
+import android.os.Looper;
+
+public class MainThread extends HandlerExecutor {
+    private MainThread(Handler handler) {
+        super(handler);
+    }
+
+    public static MainThread create() {
+        return new MainThread(new Handler(Looper.getMainLooper()));
+    }
+
+    /**
+     * Caches whether or not the current thread is the main thread.
+     */
+    private static final ThreadLocal<Boolean> sIsMainThread = new ThreadLocal<Boolean>() {
+        @Override
+        protected Boolean initialValue() {
+            return Looper.getMainLooper().getThread() == Thread.currentThread();
+        }
+    };
+
+    /**
+     * Returns true if the method is run on the main android thread.
+     */
+    public static boolean isMainThread() {
+        return sIsMainThread.get();
+    }
+}