I have a kendo ui listview with a template the conditionally hides elements based on the underlying data. An example would be as follows:
<script type="text/x-kendo-template" id="template">
<div class="product">
<img src="../content/web/foods/#= ProductID #.jpg" alt="#: ProductName # image" />
<h3>#:ProductName#</h3>
<p>#:kendo.toString(UnitPrice, "c")#</p>
<div>
# if (Discontinued) { #
Discontinued Product
# } #
</div>
</div>
</script>
If i modify the underlying dataSource items to set Discontinued with the following code:
data[index].set('Discontinued', true);
If the index is the currently selected item then that item looses focus and is no longer selected.
Please see the following dojo example http://dojo.telerik.com/UlOze, select an item from the list and then set it to discontinued.
Has anybody found a solution / workaround for this issue ?
Thanks.
------------- FINAL SOLUTION --------------
Following on from dimodi's answer below I pieced together the solution.. For this to work the dataSource must have the schema -> model -> id property set.
1st capture the currently selected data item:
var selectedItem = $(listElement).find(".k-state-selected");
var selectedDataItem = list.dataItem(selectedItem);
2nd: After calling .set re-find the data item and set the k-state-selected class. This is nessesary as the list component is regenerating the uid's.
if (selectedDataItem) {
var newSelectedItem = list.dataSource.get(selectedDataItem.ProductID)
var uid = newSelectedItem.uid;
jQuery("[data-uid='" + uid + "']").addClass("k-state-selected");
}
I've updated the original dojo to show this solution, incase it helps someone else.
When a data item is changed, its corresponding ListView item is re-rendered to apply the changes. As a result, the selection is lost, as it is a purely visual feature that is not persisted across rebinds. You can check if an item is selected before using set() and then restore the selection manually by applying a k-state-selected class to the element afterwards.
Related
I have a repeater that looks like
<ion-item ng-repeat="obj in data">
{{obj.value}}
</ion-item>
which displays an item list of the numbers 1 through 10. When an odd number shows up I want that particular item to be hidden. Is this something I can do within the view it's self? Regardless what's a good way to do this?
You have to control your data set in your controller:
$scope.ProId = "";
$scope.HideOdd = function (){
-- create a function to hide DATA
}
and on your ion tag ad ng-hide="HideOdd"
I have a requirement to show time estimates for each file currently in progress of being uploaded. We are testing out the UI portion of the uploader and wondered if there is a way to add this in near the current % complete/size information that is currently displayed.
I don't really want to make my own entire custom UI just for that purpose.
You can add custom elements to Fine Uploader's template, and these elements will be rendered onto the DOM which you can than manipulate via JavaScript.
<script type="text/template" id="qq-template">
<div class="qq-uploader-selector qq-uploader">
...
<ul class="qq-upload-list-selector qq-upload-list">
<li>
...
<!-- custom element for updating with progress -->
<span class="file-progress"></span>
</li>
</ul>
...
</div>
</script>
You would then have to tie into Fine Uploader's events to update that element when the file is submitted (onSubmitted) or progresses (onProgress). To do this you'd use the getItemByFileId API method to select the file list item in the DOM, and then use JS to select that child element containing the progress element that you wanted to update, and -- naturally -- update it as you would.
// ...
onSubmitted: function (id, name) {
var el = getElementByFileId(id) // retrieves the list element for this file id.
// initialze the progress element, with 0% for example
},
// ...
onProgress: function (id, name, uploadedBytes, totalBytes) {
// update as the file progresses ....
}
// ...
The documentation has more examples on how easy it is to add custom elements to the DOM.
I'm trying using Backbone.Marionette to build an application. The application gets its data through REST calls.
In this application I created a model which contains the following fields:
id
name
language
type
I also created an ItemView that contains a complete form for the model. The template I'm using is this:
<form>
<input id="model-id" class="uneditable-input" name="id" type="text" value="{{id}}"/>
<input id="model-name" class="uneditable-input" name="name" type="text" value="{{name}}" />
<select id="model-language" name="language"></select>
<select id="model-type" name="type"></select>
<button class="btn btn-submit">Save</button>
</form>
(I'm using Twig.js for rendering the templates)
I am able to succesfully fetch a model's data and display the view.
What I want to do now is populate the select boxes for model-language and model-type with options. Language and type fields are to be restricted to values as a result from REST calls as well, i.e. I have a list of languages and a list of types provided to me through REST.
I'm contemplating on having two collections, one for language and one for type, create a view for each (i.e. viewLanguageSelectOptions and viewTypeSelectOptions), which renders the options in the form of the template I specified above. What I am not sure of is if this is possible, or where to do the populating of options and how to set the selected option based on data from the model. It's not clear to me, even by looking at examples and docs available, which Marionette view type this may best be realized with. Maybe I'm looking in the wrong direction.
In other words, I'm stuck right now and I'm wondering of any of you fellow Backbone Marionette users have suggestions or solutions. Hope you can help!
Create a view for a Select in my opinion is not needed in the scenario that you are describing, as Im assuming that your languages list will not be changing often, and the only porpouse is to provide a list from where to pick a value so you can populate your selects in the onRender or initializace function of your view using jquery.
you can make the calls to your REST service and get the lists before rendering your view and pass this list to the view as options and populate your selects on the onRender function
var MyItemView = Backbone.Marionette.ItemView.extend({
initialize : function (options) {
this.languages = options.languages;
this.typeList = options.typeList;
},
template : "#atemplate",
onRender : function () {
this.renderSelect(this.languages, "#languagesSelect", "valueofThelist");
this.renderSelect(this.typeList, "#typesSelect", "valueofThelist")
},
renderSelect :function (list, element, value) {
$.each(list, function(){
_this.$el.find(element).append("<option value='"+this[value]+"'>"+this[value]+"</option>");
});
}
})
var languagesList = getLanguages();
var typeList = getTypesList();
var myItemView = new MyItemView({languages:languagesList,typeList :typeList });
Hope this helps.
I am using a template to display some button. I have written the following code :
template: kendo.template($("#edit-template").html())
And in the edit template I have written :
<script id="edit-template" type="text/x-kendo-template">
<a class="k-grid-edit" style="visibility:hidden;" id="edit">Edit</a>
</script>
Initially it will be hidden mode. On databound function, I will show or hide the button. If the permission is shown then I write
$(".k-grid-edit").show();
Whenever I am updating the grid then the edit button is disappearing again. This is because the button is in hidden state initially. After updating also I need to display that in visible mode. How can i do that.
Regards
What about transforming your template into:
<script id="edit-template" type="text/x-kendo-template">
# if (isVisible) { #
<a class="k-grid-edit">Edit</a>
# } else {#
<a class="k-grid-edit" style="display:none">Edit</a>
# } #
</script>
and then have a variable:
var isVisible = false;
Then toggling it to visible is:
isVisible = true;
$(".k-grid-edit").show();
while hiding it is:
isVisible = false;
$(".k-grid-edit").hide();
Basically the variable isVisible stores the state and the template checks it using JavaScript.
NOTE The template might be more compact but I think this is more readable.
One more question (styling) I removed the id from the anchor a in your template since id must be unique and you were setting the same id for all kendoGrid rows.
MVC/Razor/Javascript newbie question:
I have a MVC3/Razor form where the use can select a single product from a drop down list.
<div class="editor-label">
Product
</div>
<div class="editor-field">
#Html.DropDownList("ProductID", (IEnumerable<SelectListItem>)ViewBag.Products, "--Select One--")
#Html.ValidationMessageFor(model => model.ProductID)
</div>
What I then want is to display the price of the selected product on a label just below the drop down list (model property name is Amount).
This should be pretty easy, but I am pretty new at Razor, and know almost nothing about Javascript, so I would appreciate any verbose explanations of how do do it, and how it all hangs together.
Add a div/span under the Dropdown .
#Html.DropDownList("ProductID", (IEnumerable<SelectListItem>)ViewBag.Products, "--Select One--")
<div id="itemPrice"></div>
and in your Script, make an ajax call to one of your controller action where you return the price.
$(function(){
$("#ProductId").change(function(){
var val=$(this).val();
$("#itemPrice").load("#Url.Action("GetPrice","Product")", { itemId : val });
});
});
and have a controller action like this in your Product controller
public string GetPrice(int itemId)
{
decimal itemPrice=0.0M;
//using the Id, get the price of the product from your data layer and set that to itemPrice variable.
return itemPrice.ToString();
}
That is it ! Make sure you have jQuery loaded in your page and this will work fine.
EDIT : Include this line in your page to load jQuery library ( If it is not already loaded),
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.7.2/jquery.min.js"></script>
The Amount isn't available to your view when the user selects a product (remember the page is rendered on the server, but actually executes on the client; your model isn't available in the page on the client-side). So you would either have to render in a JavaScript array that contains a lookup of the amount based on the product which gets passed down to the client (so it's available via client-side JavaScript), or you would have to make a callback to the server to retrieve this information.
I would use jQuery to do this.
Here's a simple example of what the jQuery/Javascript code might look like if you used an array.
<script type="text/javascript" src="https://ajax.googleapis.com/ajax/libs/jquery/1.7.2/jquery.min.js"></script>
<script>
$(document).ready(function() {
// This code can easily be built up server side as a string, then
// embedded here using #Html.Raw(Model.NameOfPropertyWithString)
var list = new Array();
list[0] = "";
list[1] = "$1.00";
list[2] = "$1.25";
$("#ProductID").change(displayAmount).keypress(displayAmount);
function displayAmount() {
var amount = list[($(this).prop('selectedIndex'))];
$("#amount").html(amount);
}
});
</script>
<select id="ProductID" name="ProductID">
<option value="" selected>-- Select --</option>
<option value="1">First</option>
<option value="2">Second</option>
</select>
<div id="amount"></div>
You'll want to spend some time looking at the docs for jQuery. You'll end up using it quite a bit. The code basically "selects" the dropdown and attaches handlers to the change and keypress events. When they fire, it calls the displayAmount function. displayAmount() retrieves the selected index, then grabs the value out of the list. Finally it sets the HTML to the amount retrieved.
Instead of the local array, you could call your controller. You would create an action (method) on your controller that returned the value as a JsonResult. You would do a callback using jquery.ajax(). Do some searching here and the jQuery site, I'm sure you'll find a ton of examples on how to do this.