The XdevTree is a selection component with which you can map hierarchical data. Each tree has a root node from which all the other nodes branch out. You have the option of displaying or not displaying the root. Each node has a lot of further nodes hanging onto it, which are called as Children. A node with children is called as parent node. The user can select nodes with collapsing and expanding children. By default, the data is lazy reloaded only on expanding a node using the RapidClipse framework. Even drag-and-draop is supported.

Wichtige Properties:

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• Preload all - Initially loads the entire tree.
• ReadOnly 
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Important events:

• Misc
  • nodeCollapse - Event is triggered on collapsing an entry.
  • nodeExpand - Is triggered if the column width is changed. The id of the item can be read from the Tree.CollapseEvent-Object.

Data binding:

• Data container (model) 

  • XdevBeanItemContainer - Standard data container. The allocation is set using the setContainerDataSource method.  However, with this method, only an element level is possible.

    // Generates a new XdevBeanItemContainer 'productList' XdevBeanItemContainer<Product> productList = new XdevBeanItemContainer<Product>(Product.class);   // Sets the XdevBeanItemContainer tree.setContainerDataSource(productList);

    
    

  • XdevHierarchicalBeanItemContainer - Is used by RapidClipse, if the tree is configured using the properties. 

    tree.setContainerDataSource( // new TreeDataProvider for this tree. Inserts all root nodes with findAll and defines two additional levels TreeDataProvider.New(DAOs.get(EmployeeDAO.class).findAll()) .addLevel(Employee::getOrders).addLevel(Order::getOrderdetails), false );

    
    

Examples:

• Root visible or not visible

• Initially entire tree expanded / collapsed

• Return selected node

• Locate specific node

• Move node using drag and drop

• Attach multiple values to a node separated with semicolon

• Add new node

• Remove selected node

• Add entries - Manually adds entries to the XdevTree.

• Change icons, possibly a separate icon for each level or a separate icon for each data type

All XdevTree Methods