Detailed explanation of the use of tree menu with check and cascading selection

This time I will bring you a detailed explanation of the use of tree menu with check selection and cascading selection. What are the precautions for using tree menu with check selection and cascading selection? The following is a practical case, let's take a look.

The specific code is as follows:

<p id="searchTree"></p> 
 <script>
  var treeData = [{
   text: "Parent 1",
   nodes: [{
    text: "Child 1",
    nodes: [{
     text: "Grandchild 1"
    }, {
     text: "Grandchild 2",
     nodes: [{
      text: "Grandchild 2-1",
      nodes: [{
       text: "Grandchild 2-1-1"
      }, {
       text: "Grandchild 2-2-1",
      }]
     }, {
      text: "Grandchild 1-2",
     }]
    }]
   }, {
    text: "Child 2",
    nodes: [{
     text: "Grandchild 2-1"
    }, {
     text: "Grandchild 2-2",
    }]
   }]
  }, {
   text: "Parent 2",
   id:'11111'
  }, {
   text: "Parent 3"
  }, {
   text: "Parent 4"
  }, {
   text: "Parent 5"
  }];
  var nodeCheckedSilent = false;
  function nodeChecked(event, node) {
   if (nodeCheckedSilent) {
    return;
   }
   nodeCheckedSilent = true;
   checkAllParent(node);
   checkAllSon(node);
   nodeCheckedSilent = false;
  }
  var nodeUncheckedSilent = false;
  function nodeUnchecked(event, node) {
   if (nodeUncheckedSilent)
    return;
   nodeUncheckedSilent = true;
   uncheckAllParent(node);
   uncheckAllSon(node);
   nodeUncheckedSilent = false;
  }
  //选中全部父节点 
  function checkAllParent(node) {
   $('#searchTree').treeview('checkNode', node.nodeId, {
    silent: true
   });
   var parentNode = $('#searchTree').treeview('getParent', node.nodeId);
   if (!("nodeId" in parentNode)) {
    return;
   } else {
    checkAllParent(parentNode);
   }
  }
  //取消全部父节点 
  function uncheckAllParent(node) {
   $('#searchTree').treeview('uncheckNode', node.nodeId, {
    silent: true
   });
   var siblings = $('#searchTree').treeview('getSiblings', node.nodeId);
   var parentNode = $('#searchTree').treeview('getParent', node.nodeId);
   if (!("nodeId" in parentNode)) {
    return;
   }
   var isAllUnchecked = true; //是否全部没选中 
   for (var i in siblings) {
    if (siblings[i].state.checked) {
     isAllUnchecked = false;
     break;
    }
   }
   if (isAllUnchecked) {
    uncheckAllParent(parentNode);
   }
  }
  //级联选中所有子节点 
  function checkAllSon(node) {
   $('#searchTree').treeview('checkNode', node.nodeId, {
    silent: true
   });
   if (node.nodes != null && node.nodes.length > 0) {
    for (var i in node.nodes) {
     checkAllSon(node.nodes[i]);
    }
   }
  }
  //级联取消所有子节点 
  function uncheckAllSon(node) {
   $('#searchTree').treeview('uncheckNode', node.nodeId, {
    silent: true
   });
   if (node.nodes != null && node.nodes.length > 0) {
    for (var i in node.nodes) {
     uncheckAllSon(node.nodes[i]);
    }
   }
  }
  $('#searchTree').treeview({
   showCheckbox: true,
   data: treeData,
   onNodeChecked: nodeChecked,
   onNodeUnchecked: nodeUnchecked
  });
  </script>

I believe you have mastered the method after reading the case in this article. For more exciting information, please pay attention to other related articles on the php Chinese website!

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The above is the detailed content of Detailed explanation of the use of tree menu with check and cascading selection. For more information, please follow other related articles on the PHP Chinese website!