1 files changed, 79 insertions, 0 deletions
diff --git a/src/com/android/camera/PreferenceGroup.java b/src/com/android/camera/PreferenceGroup.java
new file mode 100644
index 000000000..4d0519f4e
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+++ b/src/com/android/camera/PreferenceGroup.java
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+/*
+ * Copyright (C) 2009 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;
+
+import android.content.Context;
+import android.util.AttributeSet;
+
+import java.util.ArrayList;
+
+/**
+ * A collection of <code>CameraPreference</code>s. It may contain other
+ * <code>PreferenceGroup</code> and form a tree structure.
+ */
+public class PreferenceGroup extends CameraPreference {
+    private ArrayList<CameraPreference> list =
+            new ArrayList<CameraPreference>();
+
+    public PreferenceGroup(Context context, AttributeSet attrs) {
+        super(context, attrs);
+    }
+
+    public void addChild(CameraPreference child) {
+        list.add(child);
+    }
+
+    public void removePreference(int index) {
+        list.remove(index);
+    }
+
+    public CameraPreference get(int index) {
+        return list.get(index);
+    }
+
+    public int size() {
+        return list.size();
+    }
+
+    @Override
+    public void reloadValue() {
+        for (CameraPreference pref : list) {
+            pref.reloadValue();
+        }
+    }
+
+    /**
+     * Finds the preference with the given key recursively. Returns
+     * <code>null</code> if cannot find.
+     */
+    public ListPreference findPreference(String key) {
+        // Find a leaf preference with the given key. Currently, the base
+        // type of all "leaf" preference is "ListPreference". If we add some
+        // other types later, we need to change the code.
+        for (CameraPreference pref : list) {
+            if (pref instanceof ListPreference) {
+                ListPreference listPref = (ListPreference) pref;
+                if(listPref.getKey().equals(key)) return listPref;
+            } else if(pref instanceof PreferenceGroup) {
+                ListPreference listPref =
+                        ((PreferenceGroup) pref).findPreference(key);
+                if (listPref != null) return listPref;
+            }
+        }
+        return null;
+    }
+}