I am using jsTree in angularjs and using "select_node" in "ready". This method is returning false. On code debugged, it is observed that tree.instance._model.data doesn't have that node so this.get_node(obj); returns false. (below is code snippet)
select_node : function (obj, supress_event, prevent_open, e) {
var dom, t1, t2, th;
if($.isArray(obj)) {
obj = obj.slice();
for(t1 = 0, t2 = obj.length; t1 < t2; t1++) {
this.select_node(obj[t1], supress_event, prevent_open, e);
}
return true;
}
obj = this.get_node(obj); //here it returns false
if(!obj || obj.id === '#') {
return false;
}
}
I am not sure why tree.instance._model.data doesn't have data at that time because it often works when I refresh the browser.
Any help? Below is my code snippet.
me.onTreeReady = function (eve, tree) {
tree.instance.deselect_all();
tree.instance.refresh(true, true);
var response = tree.instance.select_node(defaultNode);
}
This must be some kind of race condition related to your angular directive provider.
This issue has been resolved. I had added "id" to html, so when multiple instances were created with same id it gives the above error. Issue resolved by removing this id.
Old Code
<div class="row no-margin" cg-busy="ctrl.promise">
<div class="bg-white">
<div **id="treeView"** js-tree="ctrl.treeConfig"
should-apply="ctrl.applyModelChanges()"
ng-model="ctrl.treeData"
tree="ctrl.treeInstance"
tree- events="ready:ctrl.onTreeReadyEvent;select_node:ctrl.onNodeSelectEvent;deselect_node:ctrl.onNodeDeselectEvent">
</div>
</div>
</div>
New Code:
<div class="row no-margin" cg-busy="ctrl.promise">
<div class="bg-white">
<div js-tree="ctrl.treeConfig"
should-apply="ctrl.applyModelChanges()"
ng-model="ctrl.treeData"
tree="ctrl.treeInstance"
tree- events="ready:ctrl.onTreeReadyEvent;select_node:ctrl.onNodeSelectEvent;deselect_node:ctrl.onNodeDeselectEvent">
</div>
</div>
</div>
Related
start html ----------------------
div id="pageWrapper"> //page wrapper
<div id="page-image"><img src="./images/lightHouseB.png"></div>
<div id="man-image"><img src="./images/sailor.png"></div>
<section>
<header>There Are Things in the Dark, can you Find them? </header>
<!-- basic html title page -->
<div id="textBox">
<a id="mousee" href="#">Hidden Ships</div></a>
</div>
</section>
html end point -----------------------------------
window.onload = eventMonitor();
function eventMonitor(){
document.getElementById('manimage').addEventListener('onmouseover', popMap(), false);
document.getElementById('mousee').addEventListener('click', shipsSlider(), false);
function popMap(url='shipsSlide.html',windowName, w, h) {
var left = (screen.width/2)-(w/2);
var top = (screen.height/2)-(h/2);
return window.open(url=" ", "Ship Pictures", toolbar='no', directories="no", status='no');
}
keep getting a null value - can not read property of eventlistener of null.
You need to reference the function to window.onload, and it will be called once the window loads.
See the difference here.
window.onload = onload;
function onload(){
console.log('DOM loaded');
}
And here I am referencing whatever onload will return, in this case a function.
window.onload = onload(); // This will return the anonymous function of onload
// __________________|^^|
function onload(){
return function(){
console.log('DOM loaded');
}
}
So what you want to do is to remove () so your code becomes:
window.onload = eventMonitor; // eventMonitor will be run once windows loads.
I have this ionic tag already populated and with all items unchecked:
<ion-checkbox ng-repeat="categoria in listaCategorias"
ng-model="categoria.checked"
ng-checked="categoria.checked"
ng-change="recuperarServicos(categoria)">
{{ categoria.nmCategoria }}
</ion-checkbox>
And here my controller code that has a list of 'categoria ids':
//here I have the ids recovered from database that I split into an array of ids
var idsCategoria = $scope.meuanuncio.idsCategoria.trim().split(',');
if($scope.listaCategorias.length > 0)
{
//for each item in my listaCategorias (used in ng-repeat)
for (var i = 0; i < $scope.listaCategorias.length; i++) {
var item = $scope.listaCategorias[i];
//I compare id from each item with my list recovered from database
if(idsCategoria.indexOf($scope.listaCategorias[i].idCategoria) != -1)
{
//If the item id exist in database list, I check the item
item.checked = true;
// Below there are other ways that I tried to use
// $scope.listaCategorias[i].Selected = true;
// $scope.listaCategorias[i].checked = true;
$scope.listaCategorias[0].checked = true;
}
}
};
But I can´t do my ion-checkbox item checked.
What am I doing wrong ?
Thanks.
ng-model="categoria.checked"
looks fine, don't think you need the ng-checked though.
var item = $scope.listaCategorias[i];
item.checked = true;
Nope, the item gets lost through the loop. I see you were trying with:
$scope.listaCategorias[i].checked = true;
Did you get an error or something? Because this looks like the way to do it.
Maybe try looping on a div around the ion-checkbox? aka
<div ng-repeat="categoria in listaCategorias">
<ion-checkbox ng-model="categoria.checked"
ng-change="recuperarServicos(categoria)">
{{ categoria.nmCategoria }}
</ion-checkbox>
</div>
try this :
<div ng-repeat="categoria in listaCategorias track by $index">
<ion-item class="item item-checkbox">
<label class="checkbox">
<input type="checkbox" ng-model="categoria.checked" ng-change="recuperarServicos(categoria)">
</label>
{{categoria.nmCategoria}}
</ion-item>
</div>
Controller:
$scope.recuperarServicos = function(categoria){
if(categoria.selected && ($scope.selectedItems.indexOf(categoria.name) < 0)){
$scope.selectedItems.push(categoria.name);
}else{
$scope.selectedItems.splice($scope.selectedItems.indexOf(categoria.name), 1);
}
};
hope this helps you..in someway..!
My problem was when I attribute my array of items to the $scope.listaCategorias.
I was doing that:
$scope.listaCategorias = listaCategorias;
But I need to do that:
$scope.listaCategorias.push.apply($scope.listaCategorias, listaCategorias);
I was building an array with the checked attribute inside, but when I associate my built list, I was associating the first one, which has not the checked attribute setted.
Let me show my code now.
My view :
<div ng-repeat="item in listaCategorias track by $index">
<ion-item class="item item-checkbox">
<label class="checkbox">
<input type="checkbox" ng-model="item.checked" ng-checked="item.checked" ng-change="recuperarServicos(item)">
</label>
{{ item.nmCategoria }}
</ion-item>
</div>
My controller:
//here I get all my 'categorias' from datatable
listaCategorias = appFactory.recuperarCategorias();
//If list is not null go ahead
if(listaCategorias != null) {
//split into an array all my 'categoria' ids
var idsCategoria = $scope.meuanuncio.idsCategoria.split(',');
//if list has items go ahead
if(listaCategorias.length > 0) {
for (var i = 0; i < listaCategorias.length; i++) {
//if 'categoria' id exists in datatable list set true, else false
if(idsCategoria.indexOf(listaCategorias[i].idCategoria) != -1) {
listaCategorias[i].checked = true;
}
else {
listaCategorias[i].checked = false;
}
}
};
//Here is the point !!! I need to load my $scope variable this way to build all my items correctly
$scope.listaCategorias.push.apply($scope.listaCategorias, listaCategorias);
}
I am learning to use MVC 4/MVVM/Knockout for a web-managed data project. I have been running into a problem updating the View when using the remove function on an observable array. The updates happen when using push or unshift, but not remove. Using the debugger in chrome I can see that the data is being removed from the array, the update event just isn't working.
Snippet from the html is the table below, there is a form I did not include for adding or editing data.
<div id="MessageDiv" data-bind="message: Message"></div>
<div class="tableContainer hiddenHead">
<div class="headerBackground"></div>
<div class="tableContainerInner">
<table id="adapter-table" class="grid" data-bind="sortTable: true">
<thead>
<tr>
<th class="first">
<span class="th-inner">Name</span>
</th>
<th>
<span class="th-inner">DeviceID</span>
</th>
<th>
<span class="th-inner"></span>
</th>
<th>
<span class="th-inner"></span>
</th>
</tr>
</thead>
<tbody data-bind="template: { name: 'AdaptersTemplate', foreach: Adapters }">
</tbody>
</table>
<script id="AdaptersTemplate" type="text/html">
<tr>
<td data-bind="text: Name"></td>
<td data-bind="text: DeviceID"></td>
<td>Edit
<td>Delete
</tr>
</script>
</div>
<input type="button" data-bind='click: addAdapter' value="Add New Adapter" />
<input type="button" data-bind='click: saveAll' value="Save Changes" id="SaveChangesButton" />
</div>
My javascript has been set up to manage the VM as restful and caches the changes. Add, Edit, and Saving/Deleting data all seems to work without throwing errors that I am seeing in the debugger in Chrome. Confirming changes seems to work fine and makes the changes to the database as expected.
$(function () {
var viewModel = new AdaptersModel();
getData(viewModel);
});
function getData(viewModel) {
$.getJSON("/api/AdapterList",
function (data) {
if (data && data.length > 0) {
viewModel.SetAdaptersFromJSON(data);
}
ko.applyBindings(viewModel);
});
}
//#region AdapterVM
function Adapter(name, siFamily, deviceIDs) {
var self = this;
self.Name = ko.observable(name);
self.DeviceID = ko.observable(deviceIDs);
self.ID = 0;
}
function AdaptersModel() {
var self = this;
self.Adapters = ko.observableArray([]);
self.DeleteAdapters = ko.observableArray([]);
self.NewAdapter = ko.observable(new Adapter("", "", "", ""));
self.Message = ko.observable("");
self.SetAdaptersFromJSON = function (jsData) {
self.Adapters = ko.mapping.fromJS(jsData);
};
//#region Edit List Options: confirmChanges
self.confirmChanges = function () {
if (self.NewAdapter().ID == 0) {
self.Adapters.push(self.NewAdapter());
}
};
//#endregion
//#region Adapter List Options: addAdapter, selectItem, deleteItem, saveAll
self.addAdapter = function () {
self.NewAdapter(new Adapter("", "", "", ""));
};
self.selectItem = function (item) {
self.NewAdapter(item);
};
self.deleteItem = function(item) {
self.DeleteAdapters.push(item.ID());
self.Adapters.remove(item);
};
self.saveAll = function () {
if (self.Adapters && self.Adapters().length > 0) {
var filtered = ko.utils.arrayFilter(self.Adapters(),
function(adapter) {
return ((!isEmpty(adapter.Manufacturer())) &&
(!isEmpty(adapter.Name())) &&
(!isEmpty(adapter.DeviceIDs()))
);
}
);
var updateSuccess = true;
if (self.DeleteAdapters().length > 0) {
jsonData = ko.toJSON(self.DeleteAdapters());
$.ajax({
url: "/api/AdapterList",
cache: false,
type: "DELETE",
data: jsonData,
dataType: "json",
contentType: "application/json; charset=utf-8",
success: function () { updateSuccess = true; },
error: function () { updateSuccess = false; }
});
}
var jsonData = ko.toJSON(filtered);
$.ajax({
url: "/api/AdapterList",
type: "POST",
data: jsonData,
dataType: "json",
contentType: "application/json; charset=utf-8",
success: function(data) {
self.SetAdaptersFromJSON(data);
updateSuccess = true && updateSuccess;
},
error: function () { updateSuccess = false; }
});
if (updateSuccess == true) { self.Message("Update Successfull"); }
else { self.Message("Update Failed"); }
}
};
//#endregion
}
//#endregion
ko.bindingHandlers.message = {
update: function(element, valueAccessor) {
$(element).hide();
ko.bindingHandlers.text.update(element, valueAccessor);
$(element).fadeIn();
$(element).fadeOut(4000);
}
};
ko.bindingHandlers.sortTable = {
init: function (element, valueAccessor) {
setTimeout(function () {
$(element).addClass('tablesorter');
$(element).tablesorter({ widgets: ['zebra'] });
}, 0);
}
};
function isEmpty(obj) {
if (typeof obj == 'undefined' || obj === null || obj === '') return true;
if (typeof obj == 'number' && isNaN(obj)) return true;
if (obj instanceof Date && isNaN(Number(obj))) return true;
return false;
}
The specific script portion that is failing to update my html table is:
self.deleteItem = function(item) {
self.DeleteAdapters.push(item.ID());
self.Adapters.remove(item);
};
Everything seems to work except for the remove, so I seem to be at a loss for what to look at next, and I am too new to javascript or knockout to know if this is a clue: If I run ko.applyBindings() command in the self.deleteItem function, I get the update to happen but it does give me an unhandled error:
Uncaught Error: Unable to parse bindings.
Message: ReferenceError: Message is not defined;
Bindings value: message: Message
Message was defined in the VM before binding... was there something I missed in all this?
In the beginning of your Js file you are defining var viewModel = new AdaptersModel(); but lower you are stating that function Adapter() is the view model in your region declaration. It is making your code difficult to read. I am going to take another stab at what you can do to troubleshoot, but I would suggest that your viewmodel contains the adapters and your model contains a class-like instance of what each adapter should be.
The specific error you are getting is because you are binding Message() to something and then deleting Message(). One thing you could do to trouble shoot this is to change your div to something like :
<div id="MessageDiv" data-bind="with: Message">
<h5 data-bind="message: $data"><h5>
</div>
If you could create a fiddle I could give a more definite example of why, but basically if Message() is blank the with binding should not show the header which is undefined after deletion.
What you probably need to do though is look at what is being sent as 'item' and make sure it is not your viewmodel.
self.deleteItem = function(item) {
console.log(item); // << Check console and see what is being returned
self.DeleteAdapters.push(item.ID());
self.Adapters.remove(item);
};
You are probably deleting more than just a single adapter.
This will lead you the right direction, but I would seriously consider either renaming your code.
There was a lot of help solving surrounding issues but nothing actually solved the "why" of the problem. The updates worked perfectly sometimes but not other times. When I was troubleshooting it and started to get it dumbed down and working in JSFiddle I didn't include the data-bind="sortTable: true" in all my working versions. Apparently, if you sort a table or using the code as I did it will not work. The example code I have seen floating around is here at http://jsfiddle.net/gregmason/UChLF/16/, pertinent code:
ko.bindingHandlers.tableSorter = {
init: function (element) {
setTimeout(function () { $(element).tablesorter(); }, 0);
},
update: function (element, valueAccessor) {
ko.utils.unwrapObservable(valueAccessor()); //just to get a dependency
$(element).trigger("update");
}
};
The errant behavior can be obvious by clicking the delete link on the row.
If you click on the row without sorting, you will see the row disappear correctly.
If you first click on a column to re-sort in a different order, THEN delete the row, it remains in the table and appears to have cached.
This can be handled by binding each of the table headers instead of the table itself and replacing the tableSorter code with a custom sort behavior as discussed in this thread:
knockout js - Table sorting using column headers. The sort replacement is here:
ko.bindingHandlers.sort = {
init: function(element, valueAccessor, allBindingsAccessor, viewModel, bindingContext) {
var asc = false;
element.style.cursor = 'pointer';
element.onclick = function(){
var value = valueAccessor();
var prop = value.prop;
var data = value.arr;
asc = !asc;
if(asc){
data.sort(function(left, right){
return left[prop]() == right[prop]() ? 0 : left[prop]() < right[prop]() ? -1 : 1;
});
} else {
data.sort(function(left, right){
return left[prop]() == right[prop]() ? 0 : left[prop]() > right[prop]() ? -1 : 1;
});
}
}
}
};
This has fixed my sorting/editing/deleting issues and a working jsFiddle is here: http://jsfiddle.net/gregmason/UChLF/18/
I have an array in my View Model. Items of this array are objects of Person that has two properties. when I bind this to a template it's okay. but when I change the state of one of the properties it does not reflect in UI.
what did I do wrong ?
<script type="text/html" id="person-template">
<p>Name: <span data-bind="text: name"></span></p>
<p>
Is On Facebook ?
<input type="checkbox" data-bind="checked: IsOnFacebook" />
</p>
</script>
<script type="text/javascript">
var ppl = [
{ name: 'Pouyan', IsOnFacebook: ko.observable(true) },
{ name: 'Reza', IsOnFacebook: ko.observable(false) }
];
function MyViewModel() {
this.people = ko.observableArray(ppl),
this.toggle = function () {
for (var i = 0; i < ppl.length; i++) {
ppl[i].IsOnFacebook = false;
}
}
}
ko.applyBindings(new MyViewModel());
</script>
when I press the button I want to make changes in People.IsOnFacebook property. the changes will be made successfully but the UI does not show.
You should call it like a function. Like:
ppl[i].IsOnFacebook(false);
This because the ko.observable() returns a function. It's not a property you call anymore but a function call. So in the background they will update your UI. To retreive a property that is observable. You should also use the function call.
Please see this tutorial: http://learn.knockoutjs.com/#/?tutorial=intro
I have the following situation (using KendoUI):
I have a grid binded to a datasource.
When I select a row in the grid I invoke its "change" event to get the selected dataItem e show its values through other HTML elements.
Something like the following:
$("grid-element").kendoGrid({
change: setElements
});
function setElements() {
var grid = $("#grid-element").data("kendoGrid");
var selectedItem = grid.dataItem(grid.select());
$("#span-field1").text(selectedItem.field1);
$("#span-field2").text(selectedItem.field2);
$("#span-field3").text(selectedItem.field3);
}
My question is: is it possibile to achieve the same through MVVM or a better KendoUI model binding solution?
So far I have found the following solution:
=== JAVASCRIPT ===
var vm = kendo.observable({
gridSelectedItem: null,
_field1: function() {
return this.get("gridSelectedItem.field1");
},
_field2: function() {
return this.get("gridSelectedItem.field2");
}
});
$("#grid-element").kendoGrid({
change: function(e) {
var selectedItem = this.dataItem(this.select());
vm.set("gridSelectedItem", selectedItem);
}
});
=== HTML ===
<span data-bind="text: _field1"></span>
<span data-bind="text: _field2"></span>
Is there a better way?
Indeed there you are on the right track,
Here is what I can suggest you to try:
=== JAVASCRIPT ===
var vm = kendo.observable({
gridSelectedItem: null
});
$("#grid-element").kendoGrid({
change: function(e) {
var selectedItem = this.dataItem(this.select());
vm.set("gridSelectedItem", selectedItem);
}
});
=== HTML ===
<span data-bind="text: gridSelectedItem.field1"></span>
<span data-bind="text: gridSelectedItem.field2"></span>
It should be slightly more compact.