Add LocalDataAdapter and wrappers.

1. FixedFirstDataAdapter wraps another adapter and add a data at the first
position.
2. FixedLastDataAdapter wraps another adapter and add a data at the last
position.
3. Make the LocalData interface more complete.
  - onFullScreen()
  - canSwipeInFullScreen()
  - getPath()
3. Add methods to the FilmStripView.DataAdapter to receive UI events.
  - onDataCentered()
  - onDataFullScreen()

Change-Id: I26d3a3b7facd0c451af43ce5fbbcab2baaaec427

1 files changed, 63 insertions, 0 deletions

diff --git a/src/com/android/camera/data/CameraPreviewData.java b/src/com/android/camera/data/CameraPreviewData.java
new file mode 100644
index 000000000..8f8e2138d
--- /dev/null
+++ b/src/com/android/camera/data/CameraPreviewData.java
@@ -0,0 +1,63 @@
+/*
+ * Copyright (C) 2013 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.data;
+
+import android.view.View;
+
+import com.android.camera.ui.FilmStripView.ImageData;
+
+/**
+ * A class implementing {@link LocalData} to represent a camera preview.
+ */
+public class CameraPreviewData extends LocalData.LocalViewData {
+
+    private boolean mPreviewLocked;
+
+    /**
+     * Constructor.
+     *
+     * @param v      The {@link android.view.View} for camera preview.
+     * @param width  The width of the camera preview.
+     * @param height The height of the camera preview.
+     */
+    public CameraPreviewData(View v, int width, int height) {
+        super(v, width, height, -1, -1);
+        mPreviewLocked = true;
+    }
+
+    @Override
+    public int getType() {
+        return ImageData.TYPE_CAMERA_PREVIEW;
+    }
+
+    @Override
+    public boolean canSwipeInFullScreen() {
+        return !mPreviewLocked;
+    }
+
+    /**
+     * Locks the camera preview. When the camera preview is locked, swipe
+     * to film strip is not allowed. One case is when the video recording
+     * is in progress.
+     *
+     * @param lock {@code true} if the preview should be locked. {@code false}
+     *             otherwise.
+     */
+    public void lockPreview(boolean lock) {
+        mPreviewLocked = lock;
+    }
+}