How do I grab items beyond the currently defined "$('#listview').data('kendoMobileListView').dataSource.data()"?
I'm writing a feature to do a batch action with selected items of a mobile listview. The kendo.data.Datasource has data loaded in remotely, and we define the following:
The schema.total in my test case is 55. Each dataItem has a property 'Select' that has defaultValue: undefined, and is set to true/false defined by whether user selects or de-selects the item on click. I want to avoid having to create a list to hold objects and add/remove items based on whether a user selects/deselects said items, which is why i wanted to just toggle this property back and forth on click. I want the user to be able to scroll through all 55 items and select items as desired. I also want to do a 'select all' feature where the all items on the listview are selected/deselected and also allow individual toggling post 'select/de-select all' with the same 'Select' property modification in mind. Then only when the user selects to do the batch action, detect all dataItem's Select value and send those items to the function that handles the batch action.
My observations (correct me if I'm wrong):
(var dataItemList = $('#listview').data('kendoMobileListView').dataSource.data() for the purpose of brevity)
1) dataItemList is redefined every 1/2 pageSize. So initial list is dataItemList thru dataItemList, then next time it is defined (the return value of $('#listview').data('kendoMobileListView').dataSource.data()), it's dataItemList thru dataItemList (obviously where dataItemList is at index 0 and dataItemList is at index 9 of the new list), and so on...
2) property modifications of an item in dataItemList are retained, even after dataItemList is redefined. This leads me to believe all items in the datasource are saved somewhere and I just don't know how to access it. For example if i set dataItemList.Select = true, then scroll to a point on the list where dataItemList isn't on dataItemList, then scroll back (so I can read it's properties), dataItemList.Select == true versus the default 'undefined' value.
3) I can save items to a manually generated object with key-value pair and use the key to remove or add the object to the list when a click is detected, or if the 'select all' button is clicked, load in new items to the list with itemChange event, but this will be a clumsy implementation at best for the manual select/deselect functionality post-'select all' for items outside of ones currently represented by dataItemList.
To clarify on my question:
I want to access those dataItems on the kendoMobileListView that aren't returned by dataSource.data(), but I have to keep virtual scrolling and the datasource is loaded from a remote source. Is this possible? If so, how?
Let me know if you need further clarification/example. Thanks in advance.