How to manually expand 'wj-tree-view' nodes

How to manually expand 'wj-tree-view' nodes

Posted by: nilesh_nichal on 31 May 2018, 4:10 pm EST

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  nilesh_nichal

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  Posted 31 May 2018, 4:10 pm EST

  I have expanded few tree nodes and removed few nodes from collection based on some condition and want to keep that tree nodes expanded with new collection.

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  manish.gupta

  

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  Posted 31 May 2018, 10:27 pm EST

  Hi,

  You may expand the tree nodes manually via following methods:-

  Expand/Collapse All node
  
  Using treeView.collapseToLevel() method(collapse/expand all nodes to specified level).
  
  Please refer to following document for more info on collapseToLevel():-
  
  http://demos.wijmo.com/5/Angular/WijmoHelp/WijmoHelp/topic/wijmo.nav.TreeView.Class.html#collapseToLevel
  
  Expand/Collapse specific node
  
  Using treeNode.setCollapsed() method(collapse/expand a specific node)
  
  Please refer to following document for more info on setCollapsed():-
  
  http://demos.wijmo.com/5/Angular/WijmoHelp/WijmoHelp/topic/wijmo.nav.TreeNode.Class.html#setCollapsed

  
  /* 1->get instance of node */
  var node=treeView.getNode(dataItemRepresentedByNode);
  /* 2->call setCollapsed on node */
  node.setCollapsed(false,true,false);
  

  Hope it helps !

  ~Manish