CODEWITHSUNDEEP
extjstreeextjs3
tismon
tismon

Reputation: 101

check child nodes of a tree when a parent is clicked [ExtJS]

I would like to know how can i check the sibling nodes of a tree while clicking on a particular node in ExtJs.

I had given id's for each node and i can access the id of a clicked node. then how can i proceed to checking the child nodes automatically ??

somebody please help me..

Upvotes: 9

Views: 23435

Answers (7)

daniel
daniel

Reputation: 11

The answer of Mr C works fine(ExtJS 4.2), but a bug will occur when the childnodes of parentnode has 1 child. Here is my a little improvement. Someone can improve further

function (node, checked) {

    if (node.isLeaf()) {
        node = node.parentNode;
        var siblingStateEqual = true;
        if (node.childNodes.length == 1) {
            siblingStateEqual = checked;
        } else {
            node.cascadeBy(function (n) {
                if (n != node) {
                    if (n.get('checked') != checked) {
                        siblingStateEqual = false;
                    }
                }

            });
        }

        if (siblingStateEqual == checked) {
            node.set('checked', checked);
        }

    }
    else {
        node.cascadeBy(function (n) {
            n.set('checked', checked);
        });
    }
}

Upvotes: 1

Fred Dump
Fred Dump

Reputation: 1

Or, if like me, you need to automatically check/uncheck the parent node when all child leaf nodes are checked/unchecked you can try this:

function (node, checked)
{

    if (node.get('leaf'))
    {
        node = node.parentNode;
        var siblingStateEqual = true;
        node.cascadeBy(function (n)
        {
            if (n != node) {
                if (n.get('checked') != checked) {
                    siblingStateEqual = false;
                }
            }

        });

        if (siblingStateEqual == checked)
        {
            node.set('checked', checked);
        }

    }
    else
    {
        node.cascadeBy(function (n) { n.set('checked', checked); });
    }


}

Upvotes: -1

boooch
boooch

Reputation: 11

function checkChange(node, checked, Object) {
    node.cascadeBy(function(n) {
        n.set('checked', checked);
    });
}

Upvotes: 1

damo
damo

Reputation: 939

listeners:{ 

checkchange : function(node, checked) {
    node.parentNode.cascadeBy(function(n){n.set('checked', checked);});
}

}

Upvotes: 2

slammer
slammer

Reputation: 51

function nodeCheck(node) {
    node.eachChild(function(n) {
        if(n.hasChildNodes())
            nodeCheck(n)
        n.getUI().toggleCheck(false);
    });
}
var node = (tree.getSelectionModel().getSelectedNode()) ? tree.getSelectionModel().getSelectedNode() : tree.root;
if(node) nodeCheck(node);

It works well for me ;)

Upvotes: 5

It Grunt
It Grunt

Reputation: 3378

The JSON or XML will need the "checked" property set to true or false when you populate the nodes. I am assuming that you are using an AsyncTreeNode to do this for you. If the tree nodes are created without this checked property present, ExtJS will not render it with the checkbox.

Upvotes: 0

Stefan Gehrig
Stefan Gehrig

Reputation: 83642

// or any other way of getting hands on the node you want to work with
var node = treePanel.getNodeById('your-id');
node.eachChild(function(n) {
    n.getUI().toggleCheck(true);
});

If you want this to work on the whole subtree of the current node, you'll have to do some recursion.

A little more integrated:

treePanel.on('checkchange', function(node, checked) {
    node.eachChild(function(n) {
        n.getUI().toggleCheck(checked);
    });
});

Upvotes: 7

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