Pages
Starting with the R2 2023 release, Kendo UI will no longer ship Hybrid UI components. This means that the R2 2023 will be the last release to include Kendo Hybrid in the Kendo UI package. See full announcement in Kendo jQuery blog post. The last stable version that we recommend to use for Kendo Hybrid components is R3 2022 SP1.
The Hybrid ScrollView enables you to set its pageSize property, configure the rendering of its page elements, display incomplete pages, define local pages, and clear whitespaces.
Setting the pageSize Property
When the pageSize of the ScrollView is more than one, the data that is passed to the template is a JavaScript array. When the pageSize of the ScrollView is one, the data refers to the JSON object itself. Therefore, you have to modify the template for pageSize properties that equal one.
<script id="scrollview-template" type="text/x-kendo-template">
# if (data != null) { #
<div data-role="page" style="width:100%;">
<img class="carousal-image"
src="#= getPreviewImageUrl(data.Type,data.PreviewImageUrl) #"/>
</div>
# } #
</script>
Rendering Page Elements
When the ScrollView is in a data-bound mode, it generates its page elements automatically. When the DataSource is populated with data, the component uses its template to render the content of the pages.
By default, the component displays one data record per page. You can display multiple data records on a single page by setting the itemsPerPage configuration option. In such cases, the specified amount of data records is passed to the template and it is your responsibility to handle the way they are going to be displayed.
- You have to specify
template. Otherwise, the component will not be able to render the content.- To ensure smooth scrolling, the
pageSizeof the DataSource has to be six or more times theitemsPerPageamount. For example, if theitemsPerPageis set to4, thepageSizemust be24(4*6) or more.
Displaying Incomplete Pages
When the ScrollView is configured to display multiple items per page, sometimes the last data view may not be complete. For example, if itemsPerPage: 3 and you have a total of seven records in the DataSource, the component will render three pages in total. The first two contain three items while the last one has only one remaining item to display. In such cases, it is your responsibility to configure the template of the component so it is able to handle the missing records. Otherwise, a JavaScript error occurs. A possible approach to handle this issue is to use JavaScript logic (the for loop) inside the template.
The following example demonstrates a template with a JavaScript for loop.
<div id="home" data-role="view" data-model="viewModel">
<div id="scrollview" data-role="scrollview"
data-source="ds"
data-template="tmpl"
data-items-per-page="3">
</div>
</div>
<script type="text/x-kendo-template" id="tmpl">
<div>
# for (var i = 0; i < data.length; i++) { #
# var item = data[i]; #
<div>#= item.title #</div>
# } #
</div>
</script>
<script>
var ds = new kendo.data.DataSource({
data: [
{title:"Item 1", desc:"Description 1"},
{title:"Item 2", desc:"Description 2"},
{title:"Item 3", desc:"Description 3"},
{title:"Item 4", desc:"Description 4"},
{title:"Item 5", desc:"Description 5"},
{title:"Item 6", desc:"Description 6"},
{title:"Item 7", desc:"Description 7"}
]
});
var app = new kendo.mobile.Application();
</script>
Defining Local Pages
To define a local page, wrap the content in a div tag with data-role="page" attribute set.
<div data-role="scrollView">
<div data-role="page">Foo</div>
<div data-role="page">Bar</div>
</div>
Clearing Whitespaces
Whitespaces between page elements in markup causes the ScrollView pager to display an extra page. To fix this, remove any whitespace between the page elements.
<div data-role="page">
<!--page content-->
</div><div data-role="page">
<!--page content-->
</div><div data-role="page">
<!--page content-->
</div>
If a Kendo UI template is used to generate the pages, the whitespace gaps can be avoided in the way shown in the example below.
<script type="text/x-kendo-template" id="tmp"><div data-role="page" >
<!-- page content -->
</div></script>