1 files changed, 81 insertions, 0 deletions
diff --git a/platform/java/src/kankan/wheel/widget/ItemsRange.java b/platform/java/src/kankan/wheel/widget/ItemsRange.java
new file mode 100644
index 00000000..8b58a557
--- /dev/null
+++ b/platform/java/src/kankan/wheel/widget/ItemsRange.java
@@ -0,0 +1,81 @@
+/*
+ *  Android Wheel Control.
+ *  https://code.google.com/p/android-wheel/
+ *
+ *  Copyright 2011 Yuri Kanivets
+ *
+ *  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 kankan.wheel.widget;
+
+/**
+ * Range for visible items.
+ */
+public class ItemsRange {
+    // First item number
+    private int first;
+
+    // Items count
+    private int count;
+
+    /**
+     * Default constructor. Creates an empty range
+     */
+    public ItemsRange() {
+        this(0, 0);
+    }
+
+    /**
+     * Constructor
+     * @param first the number of first item
+     * @param count the count of items
+     */
+    public ItemsRange(int first, int count) {
+        this.first = first;
+        this.count = count;
+    }
+
+    /**
+     * Gets number of  first item
+     * @return the number of the first item
+     */
+    public int getFirst() {
+        return first;
+    }
+
+    /**
+     * Gets number of last item
+     * @return the number of last item
+     */
+    public int getLast() {
+        return getFirst() + getCount() - 1;
+    }
+
+    /**
+     * Get items count
+     * @return the count of items
+     */
+    public int getCount() {
+        return count;
+    }
+
+    /**
+     * Tests whether item is contained by range
+     * @param index the item number
+     * @return true if item is contained
+     */
+    public boolean contains(int index) {
+        return index >= getFirst() && index <= getLast();
+    }
+}