1 files changed, 56 insertions, 0 deletions
diff --git a/src/com/android/gallery3d/ingest/adapter/CheckBroker.java b/src/com/android/gallery3d/ingest/adapter/CheckBroker.java
new file mode 100644
index 000000000..6783f23c5
--- /dev/null
+++ b/src/com/android/gallery3d/ingest/adapter/CheckBroker.java
@@ -0,0 +1,56 @@
+/*
+ * 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.gallery3d.ingest.adapter;
+
+import java.util.ArrayList;
+import java.util.Collection;
+
+public abstract class CheckBroker {
+    private Collection<OnCheckedChangedListener> mListeners =
+            new ArrayList<OnCheckedChangedListener>();
+
+    public interface OnCheckedChangedListener {
+        public void onCheckedChanged(int position, boolean isChecked);
+        public void onBulkCheckedChanged();
+    }
+
+    public abstract void setItemChecked(int position, boolean checked);
+
+    public void onCheckedChange(int position, boolean checked) {
+        if (isItemChecked(position) != checked) {
+            for (OnCheckedChangedListener l : mListeners) {
+                l.onCheckedChanged(position, checked);
+            }
+        }
+    }
+
+    public void onBulkCheckedChange() {
+        for (OnCheckedChangedListener l : mListeners) {
+            l.onBulkCheckedChanged();
+        }
+    }
+
+    public abstract boolean isItemChecked(int position);
+
+    public void registerOnCheckedChangeListener(OnCheckedChangedListener l) {
+        mListeners.add(l);
+    }
+
+    public void unregisterOnCheckedChangeListener(OnCheckedChangedListener l) {
+        mListeners.remove(l);
+    }
+}