Add an initial version of Tree component (#9212)

This patch introduces a Tree component, implemented as a Composite
using TreeGrid. As initial version of the component, some functionality
of the old Tree component has been left out for now.

Partly addresses #8617

1 files changed, 22 insertions, 0 deletions

diff --git a/shared/src/main/java/com/vaadin/shared/ui/tree/TreeRendererState.java b/shared/src/main/java/com/vaadin/shared/ui/tree/TreeRendererState.java
new file mode 100644
index 0000000000..0bc6a499f7
--- /dev/null
+++ b/shared/src/main/java/com/vaadin/shared/ui/tree/TreeRendererState.java
@@ -0,0 +1,22 @@
+/*
+ * Copyright 2000-2016 Vaadin Ltd.
+ *
+ * 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.vaadin.shared.ui.tree;
+
+import com.vaadin.shared.ui.grid.renderers.AbstractRendererState;
+
+public class TreeRendererState extends AbstractRendererState {
+
+}