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Unique

<?php
//For use the component
YsJQuery::useComponent(YsJQueryConstant::COMPONENT_JQTREE);

$root  = new YsTreeNode('rootId');

$node0 = new YsTreeNode('node0', 'Node 0', $root);
$node0->setInitiallyOpen(true);

new YsTreeNode('node00', 'jQuery', $node0);
new YsTreeNode('node00', 'jQueryUI', $node0);
new YsTreeNode('node00', 'jQuery4PHP', $node0);

$tree = new YsTree('treeId',$root);
$tree->enableContextMenu();
$tree->enableUnique();

?>

<button id="btnOpenDialog">Show Demo</button>

<?php echo YsUIDialog::initWidget('dialogId','style="display:none" title="Basic dialog"') ?>
  Prevents from nodes with same titles coexisting (create/move/rename) in the same parent
  <br/>
  <br/>
  <?php  echo $tree->draw();  ?>
<?php echo YsUIDialog::endWidget() ?>

<?php

echo
YsJQuery::newInstance()
  ->onClick() // On Click
  ->in('#btnOpenDialog') // In the button with id "btnOpenDialog"
  ->execute( // DO
    YsUIDialog::build('#dialogId') // Build and open the UI Dialog
      ->_modal(true)
      ->_width(670)
      ->_height('auto')
      ->_buttons(array(
        'Ok' => new YsJsFunction('alert("Hello world")'),
        'Close' =>  new YsJsFunction(YsUIDialog::close('this')))
       )
  )
?>

Show Demo