Hardware

I started from checkbox tree mentioned here: Add Checkbox Selection to APEX Tree Region – HardLikeSoftware . Note you can download test app.

I changed Javascript code for Checkbox tree page (Execute on page Load). You can check result here: https://apex.oracle.com/pls/apex/f?p=104351:2

Maybe it's not exactly what you need but it's simmilar.

The latest version of treeView widget API is used. I guess you need APEX 18.1. for this code to work. API doc: https://docs.oracle.com/database/apex-18.1/AEXJS/treeView.html

Changed Code:

var tree$ = $("#mytree"), // change this to use whatever id you give the tree
    nodeAdapter = tree$.treeView("getNodeAdapter");

// Set a custom node renderer that adds a checkbox icon span
nodeAdapter.renderNodeContent = function( node, out, options, state ) {
    out.markup("<span class='treeSelCheck'></span>"); // this is the checkbox - its not a real checkbox input
    // the rest of this code is essentially a copy of what is in widget.treeView.js function renderTreeNodeContent
    if ( this.getIcon ) {
        icon = this.getIcon( node );
        if ( icon !== null ) {
            out.markup( "<span" ).attr( "class", options.iconType + " " + icon ).markup( "></span>" );
        }
    }
    link = options.useLinks && this.getLink && this.getLink( node );
    if ( link ) {
        elementName = "a";
    } else {
        elementName = "span";
    }
    out.markup( "<" + elementName + " tabIndex='-1' role='treeitem'" ).attr( "class",options.labelClass )
        .optionalAttr( "href", link )
        .attr( "aria-level", state.level )
        .attr( "aria-selected", state.selected ? "true" : "false" )
        .optionalAttr( "aria-disabled", state.disabled ? "true" : null )
        .optionalAttr( "aria-expanded", state.hasChildren === false ? null : state.expanded ? "true" : "false" )
        .markup( ">" )
        .content( this.getLabel( node ) )
        .markup( "</" + elementName + ">" );   
   
        //window.alert('nodeAdapter.renderNodeContent '+ this.getLabel( node ) +' '+ node.id);
};

tree$.treeView("option","multiple", true) // make the tree support multiple selection
    .treeView("refresh") // refresh so that all the nodes are redrawn with custom renderer
    .on("click", ".treeSelCheck", function(event) { // make that "checkbox" span control the selection
        var nodeContent$ = $(event.target).closest(".a-TreeView-content"),
            isSelected = nodeContent$.hasClass("is-selected"),
            selection$ = tree$.treeView("getSelectedNodes"),
            node$ = tree$.treeView("getNodes", nodeContent$)[0];
   
        function remove(arr, item) {
          var index = arr.indexOf(item);
          if (index > -1) {
    arr.splice(index, 1);
    }
        };

        if ( isSelected ) {
            remove(selection$,node$);
            //naredi za vse otroke
            for (i = 0; node$.children && i < node$.children.length; i++) {
              remove(selection$, node$.children[i]);
            }
        } else {
            selection$.push(node$);
            //naredi za vse otroke
            for (i = 0; node$.children && i < node$.children.length; i++) {
              selection$.push(node$.children[i])
            }
        }
        tree$.treeView("setSelectedNodes", selection$);
        $s("P2_SELECTED_NODES", selection$.map(function(n) {return n.id;}).join(":"));
        //window.alert('setSelectedNodes - onClick');
        return false; // stop propagation and prevent default
    });

tree$.treeView("option", "selectionChange", function(e){
        var nodes = $("#mytree").treeView("getSelection");
  //$s("P2_SELECTED_NODES", nodes.map(function(n) {return n.id;}).join(":"));
        tree$.treeView("setSelectedNodes", $v("P2_SELECTED_NODES").split(":").map(function(i) {
            //window.alert('setSelectedNodes - selectionChange');   
            return { id: i };
        }));
        //tree$.treeView("collapse", nodes);
        ////window.alert('selectionChange');
});

// setSelectedNodes only works if the node has been rendered so do expand all
// this is not ideal but much simpler than having to check each node and expand parents as neeeded, remove if not needed
tree$.treeView("expandAll");
tree$.treeView("setSelectedNodes", $v("P2_SELECTED_NODES").split(":").map(function(i)
{ //window.alert('setSelectedNodes');
  return { id: i }; }));
//window.alert('setSelectedNodes construktor');

Thanks you, MiroMas.

I will do what you have suggested even if my need is the opposite of what I should get with your script (I need to select a leaf and have automatically selected his ancestors).

Ciao

Cinzia

I have exactly the same question, how can you select all ancestors if you select a parent node?

I'm not JS or JQuery expert but you need to replace code:

if ( isSelected ) {
            remove(selection$,node$);
            //this is for each children, replace with while loop
            for (i = 0; node$.children && i < node$.children.length; i++) {
              remove(selection$, node$.children[i]);
            }
        } else {
            selection$.push(node$);
            //this is for each children, replace with while loop
            for (i = 0; node$.children && i < node$.children.length; i++) {
              selection$.push(node$.children[i])
            }

WITH:

if ( isSelected ) {
  remove(selection$,node$);
  while node$.parent{
   node$ = $node.parent;
    remove(selection$, node$);
}
}
else {
  selection$.push(node$);
  while node$.parent{
   node$ = $node.parent;
    selection$.push(node$);
}

Something like that

HTH

Miro

Thanks you, Miro,

I have exactly the same question.

A few weeks ago I opened a threed about the same problem (Apex 18.1 tree with Checkboxes - select all ancestor ), but I had no answer ..
I did some tests using your script and your suggestions but, at the moment, I could not get what I wanted. (selecting a tree leaf to have all his ancestors selected).

Also I am not an expert in JS and JQuery, but trying your code I verified that:

• in the first case (your first answer to Cinzia) when selecting a node I want to have all his descendants selected, I get only the first level of the children and not all.
• In the second case (your second response to Cinzia) when selecting a node I want to have all of its ancestors selected, I have verified that the "parent" property of the node does not exist.

Looking at the treeView Widget documentation it seems that the node property is "_parent" and not parent.

Changing this property into your code ..

......

if ( isSelected ) {

remove(selection$,node$);

while (node$._parent) {

node$ = $node.\_parent;

remove(selection$, node$);

}

}

else {

selection$.push(node$);

while (node$._parent){

node$ = $node.\_parent;

selection$.push(node$);

}

}

.......

now seems that the parent node object exists, but the statement:

node$ = $node._parent

is not correct and after this assignement i get the following error in the console

ReferenceError: $node is not defined

We hope that some expert can help us

in any case, many thanks for your suggestions

saverio

Thank you so much Miro now it works!
Even I did not notice the trivial typewriting error 

Thanks again
Saverio

Thanks for your help. Now it works.

Cinzia