[jira] [Created] (NETBEANS-2326) Explorer API views (ListView, TreeTableView) flicker when filtering nodes

["Emilian Bold (JIRA)" <ji...@apache.org>]

Emilian Bold created NETBEANS-2326:
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             Summary: Explorer API views (ListView, TreeTableView) flicker when filtering nodes
                 Key: NETBEANS-2326
                 URL: https://issues.apache.org/jira/browse/NETBEANS-2326
             Project: NetBeans
          Issue Type: Bug
          Components: platform - Explorer, platform - Nodes
    Affects Versions: 8.2, 10.0
            Reporter: Emilian Bold
         Attachments: dummy-nodes.png, filternode-flicker.mov

For a brief second the Explorer API views show dummy nodes for a filtered node.

The children filtering is done the 'usual' way:

{{}}{{new FilterNode.Children(node) {}}
{{ @Override}}
{{ protected Node[] createNodes(Node key) {}}
{{ if (rule(key)) {}}
{{  return super.createNodes(key);}}
{{ } else {}}

{{  //filter out}}
{{  return new Node[0];}}
{{ }}}
{{ }}}

and what happens is that the ListView / TreeTableView GUI does *not* show only the allowed nodes. It shows all the original children for a split second then it shows the filtered nodes.

See the attached screenshot and video for a general idea. I'm also going to attach a small project.  

Oddly enough Children.Keys(boolean lazy) [http://bits.netbeans.org/dev/javadoc/org-openide-nodes/org/openide/nodes/Children.Keys.html#Keys-boolean-] does mention a "dummy" Node but it was never clear what that is and I never imagined it could go all the way to the UI.

 



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