web/Script/TreeViewNods.js

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/***************************************************************************************
Name: Client Javascript for ASP.NET 2.0 TreeView 
Description: ASP.NET 2.0 TreeView lack for client operation. This set of functions provide
some supports. Includes:
* get node
* change checkbox status of parent and child nodes

Author: Hebaokui
Date:   2009-04-14
Commonts:
***************************************************************************************/

//set child nodes checkbox status
function TV2_SetChildNodesCheckStatus(node, isChecked) {
    var childNodes = TV2i_GetChildNodesDiv(node);
    if (childNodes == null)
        return;

    var inputs = WebForm_GetElementsByTagName(childNodes, "INPUT");
    if (inputs == null || inputs.length == 0)
        return;

    for (var i = 0; i < inputs.length; i++) {
        if (IsCheckBox(inputs[i]))
            inputs[i].checked = isChecked;
    }
}

//change parent node checkbox status after child node changed
function TV2_NodeOnChildNodeCheckedChanged(tree, node, isChecked) {
    if (node == null)
        return;

    var childNodes = TV2_GetChildNodes(tree, node);

    if (childNodes == null || childNodes.length == 0)
        return;

    var isAllSame = true;

    for (var i = 0; i < childNodes.length; i++) {
        var item = childNodes[i];
        var value = TV2_NodeGetChecked(item);

        if (isChecked != value) {
            isAllSame = false;
            break;
        }
    }

    var parent = TV2_GetParentNode(tree, node);
    if (isAllSame) {
        TV2_NodeSetChecked(node, isChecked);
        TV2_NodeOnChildNodeCheckedChanged(tree, parent, isChecked);
    }
    else {
        TV2_NodeSetChecked(node, false);
        TV2_NodeOnChildNodeCheckedChanged(tree, parent, false);
    }