Author: ivaynberg
Date: Sun Sep 21 18:47:06 2008
New Revision: 697655
URL: http://svn.apache.org/viewvc?rev=697655&view=rev
Log:
allow swapping of child components, useful for form-based list-view like
components
Modified:
wicket/trunk/wicket/src/main/java/org/apache/wicket/MarkupContainer.java
Modified:
wicket/trunk/wicket/src/main/java/org/apache/wicket/MarkupContainer.java
URL:
http://svn.apache.org/viewvc/wicket/trunk/wicket/src/main/java/org/apache/wicket/MarkupContainer.java?rev=697655&r1=697654&r2=697655&view=diff
==============================================================================
--- wicket/trunk/wicket/src/main/java/org/apache/wicket/MarkupContainer.java
(original)
+++ wicket/trunk/wicket/src/main/java/org/apache/wicket/MarkupContainer.java
Sun Sep 21 18:47:06 2008
@@ -1861,4 +1861,50 @@
}
}
}
+
+ /**
+ * Swaps position of children. This method is particularly useful for
adjusting positions of
+ * repeater's items without rebuilding the component hierarchy
+ *
+ * @param idx1
+ * index of first component to be swapped
+ * @param idx2
+ * index of second component to be swapped
+ */
+ public final void swap(int idx1, int idx2)
+ {
+ int size = children_size();
+ if (idx1 < 0 || idx1 >= size)
+ {
+ throw new IndexOutOfBoundsException("Argument idx is
out of bounds: " + idx1 + "<>[0," +
+ size + ")");
+ }
+
+ if (idx2 < 0 || idx2 >= size)
+ {
+ throw new IndexOutOfBoundsException("Argument idx is
out of bounds: " + idx2 + "<>[0," +
+ size + ")");
+ }
+
+ if (idx1 == idx2)
+ {
+ return;
+ }
+
+ if (children instanceof Object[])
+ {
+ final Object[] array = (Object[])children;
+ Object tmp = array[idx1];
+ array[idx1] = array[idx2];
+ array[idx2] = tmp;
+ }
+ else
+ {
+ ChildList list = (ChildList)children;
+ Object tmp = list.childs[idx1];
+ list.childs[idx1] = list.childs[idx2];
+ list.childs[idx2] = tmp;
+ }
+
+ }
}
