Created
January 12, 2014 19:19
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Knockout TreeView- A nice binding handler that accepts a dynamic tree of data, and displays a searchable and selectable tree-type list.
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| * { | |
| -webkit-touch-callout: none; | |
| -webkit-user-select: none; | |
| -khtml-user-select: none; | |
| -moz-user-select: -moz-none; | |
| -ms-user-select: none; | |
| user-select: none; | |
| font-family: "Segoe UI", "Helvetica", Arial, sans-serif; | |
| } | |
| .navbar{ | |
| margin-bottom:10px; | |
| } | |
| .ko-treeview-container { | |
| max-height: 300px; | |
| overflow-y: auto; | |
| overflow-x: hidden; | |
| border: 1px solid #eee; | |
| background-color: white; | |
| border-radius: 3px; | |
| padding-right: 7px; | |
| padding-top: 5px; | |
| } | |
| .ko-treeview-container .navbar { | |
| margin-right: 0px; | |
| } | |
| .ko-treeview-container > .ko-treeview-list { | |
| padding: 0; | |
| margin-left:0px; | |
| } | |
| .ko-treeview-list { | |
| list-style: none; | |
| } | |
| .ko-treeview-listitem { | |
| line-height: 2em; | |
| margin-top: 0px; | |
| } | |
| .ko-treeview-label { | |
| -webkit-transition: all 250ms; | |
| -moz-transition: all 250ms; | |
| -ms-transition: all 250ms; | |
| -o-transition: all 250ms; | |
| cursor: pointer; | |
| display: block; | |
| margin-left: 5px; | |
| width: 100%; | |
| background-color: white; | |
| color: #2980b9; | |
| border-bottom: 1px solid #bdc3c7; | |
| } | |
| .ko-treeview-label:hover { | |
| border-bottom-color: #2980b9; | |
| } | |
| .ko-treeview-cb { | |
| -webkit-transition: all 250ms; | |
| -moz-transition: all 250ms; | |
| -ms-transition: all 250ms; | |
| -o-transition: all 250ms; | |
| float: right; | |
| clear: both; | |
| margin-top: 1em; | |
| margin-left: 5px; | |
| } | |
| .ko-treeview-cb:checked { | |
| margin-top: 1.5em; | |
| } | |
| .ko-treeview-cb:checked + label { | |
| line-height: 50px; | |
| font-weight: bold; | |
| border-bottom-color: #27ae60; | |
| font-size: 1.1em; | |
| color: #27ae60; | |
| } |
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| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <link href="http://getbootstrap.com/2.3.2/assets/css/bootstrap.css" rel="stylesheet" type="text/css" /> | |
| <link href="http://getbootstrap.com/2.3.2/assets/css/bootstrap-responsive.css" rel="stylesheet" type="text/css" /> | |
| <link href="treeview.css" rel="stylesheet" type="text/css" /> | |
| <script src="http://cdnjs.cloudflare.com/ajax/libs/knockout/2.2.1/knockout-min.js"></script> | |
| <script src="treeview.js"></script> | |
| <meta charset=utf-8 /> | |
| <title>Knockout TreeView</title> | |
| </head> | |
| <body> | |
| <div data-bind="treeView:{title:'Some Title',selected:selectedNodes, data:data}"> | |
| </div> | |
| <h4>Selected Nodes</h4> | |
| <ul data-bind="foreach: selectedNodes"> | |
| <li data-bind="text: $data"></li> | |
| </ul> | |
| </body> | |
| </html> |
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| ko.bindingHandlers.treeView = { | |
| createNodes: function(rootElement, options){ | |
| var rootTmpl = '<script id="ko-treeview-root-tmpl"><div class="navbar"><p class="brand" data-bind="text:$data.title">Title</p><div class="container"><form class="navbar-form pull-right col-sm-4"><div class="input-append"><input class="span4" type="text" placeholder="Search" data-bind="value:$data.search, valueUpdate: \'afterkeydown\'"/><span class="add-on"><i class="icon-search"></i></span></div></form></div></div><ul class="ko-treeview-list" data-bind="template:{foreach:$data.data,name:\'ko-treeview-node-tmpl\'}"></ul></script>'; | |
| var nodeTmpl = '<script id="ko-treeview-node-tmpl"><li class="ko-treeview-listitem"><div data-bind="template:{name:\'ko-treeview-item-tmpl\',data:$data}"></div><ul class="ko-treeview-list" data-bind="template:{name:\'ko-treeview-node-tmpl\',foreach:$data[$root.childNode]}"></div></li></script>'; | |
| var itemTmpl ='<script id="ko-treeview-item-tmpl"><div data-bind="visible:$data[$root.label].indexOf($root.search()) > -1"><input type="checkbox" class="ko-treeview-cb" data-bind="checked: $root.selected, attr:{value:$data[$root.label], id:$data[$root.label]}" /><label class="ko-treeview-label" data-bind="text:$data[$root.label], attr:{for:$data[$root.label]}"></label></div></script>' | |
| //append templates | |
| document.body.insertAdjacentHTML('beforeend', rootTmpl); | |
| document.body.insertAdjacentHTML('beforeend', nodeTmpl); | |
| document.body.insertAdjacentHTML('beforeend', itemTmpl); | |
| //apply first binding | |
| ko.applyBindingsToNode(rootElement, {template:{name:"ko-treeview-root-tmpl"}},options); | |
| }, | |
| init: function(element, valueAccessor) { | |
| //style element | |
| element.className = "ko-treeview-container"; | |
| //extend options with search | |
| var options = valueAccessor(); | |
| options.search = ko.observable(""); | |
| //set default data values | |
| if(!options.label) options.label = 'id'; | |
| if(!options.childNode) options.childNode = 'children'; | |
| //create the tree | |
| ko.bindingHandlers.treeView.createNodes(element,options); | |
| valueAccessor().data.subscribe(function(){ | |
| ko.bindingHandlers.treeView.createNodes(element,options); | |
| }); | |
| //let this handler control its descendants. | |
| return { controlsDescendantBindings: true }; | |
| } | |
| }; | |
| function vm(){ | |
| this.selectedNodes = ko.observableArray([]); | |
| this.data = ko.observableArray([ | |
| { | |
| id:"Level 1", | |
| children:[ | |
| {id:"Level 1-1",children:[ | |
| {id:"Level 1-1-1",children:[ | |
| {id:"Level 1-1-1-1"} | |
| ]} | |
| ]}, | |
| {id:"Level 1-2"}, | |
| ] | |
| }, | |
| { | |
| id:"Level 2", | |
| children:[ | |
| {id:"Level 2-1",children:[ | |
| {id:"Level 2-1-1"} | |
| ]}, | |
| {id:"Level 2-2"}, | |
| ] | |
| }, | |
| ]); | |
| } | |
| var myVM = new vm(); | |
| ko.applyBindings(myVM); | |
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Very nice one. Still useable on 2020 ;)