You are correct in your assumption, you have to work with streams to operate on arbitrarely large JSON. %ToJSON and %FromJSON work with streams. Here is an example how streams can work with %FromJSON to read a file:

        set fileStream = ##class(%Stream.FileCharacter).%New()
        $$$THROWONERROR(tsc,fileStream.LinkToFile(<pFile>))
       
        set jsonObject = ##class(%DynamicObject).%FromJSON(fileStream)

Hi Simcha,

you can easily retrieve the data that you are using in your layout (AlerTList in your case), by calling the function getSourceData() on your documentView component. Assuming the id of your documentView is 'mainView', the following code sample should work in your environment:

var view = zen('mainView');

var data = view.getSourceData();

console.log(data.AlerTList);

HTH,

Stefan

Hi Jiri,

take a look at this part of the documentation:

http://docs.intersystems.com/latest/csp/docbook/DocBook.UI.Page.cls?KEY=...

I recommend using a code structure as described in example 1 (try-catch).

HTH,

Stefan

As I mentioned before the onevent method is not directly called for most events. The onevent method is only called for viewport changes by default.

Here is an example how you can register your own events. Everything happens in the homepage class.

Step 1) Subscribe to the onPageShow callback

Most pageManagers implement the onPageShow method to let you know when a certain layout has finished rendering. This is a complete documentView example:

<mojo:documentView
 id="mainView"
ongetdata="return zenPage.getContent('data',key,criteria);"
ongetlayout="return zenPage.getContent('layout',key,criteria);"
initialDocumentKey="login"
initialLayoutKey="login"
>
<mojo:jQM-1.4.3-PageManager onPageShow="zenPage.onPageShow(layoutkey,documentkey);">
<mojo:HTML5Helper/>
<mojo:jQM-1.4.3-Helper/>
<mojo:mojoDefaultHelper/>
</mojo:jQM-1.4.3-PageManager>
</mojo:documentView>

Step 2) Implement your logic

I'll just paste the code in here, as I have documented the methods individually:

/// Gets called when a certain layout has been rendered.
/// In this case we are registering additional events and
/// forward them to the onevent callback method in the template.
ClientMethod onPageShow(
    layoutKey,
    documentKey) [ Language = javascript ]
{
    if (layoutKey=='login') {
        zenPage.registerEventHandler('txt-user','keydown');
    }
}

/// Register an event to a layout object by key.
ClientMethod registerEventHandler(
    key,
    eventType) [ Language = javascript ]
{
    var element = zen('mainView').getItemByKey(key);
    element.$findElement('').addEventListener(eventType,new Function('evt','return zenPage.myCustomEventHandler("'+eventType+'","'+key+'");'),false);
}

/// Forward an event to the onevent method in the template.
ClientMethod myCustomEventHandler(
    evtType,
    key) [ Language = javascript ]
{
    var item = zen('mainView').getItemByKey(key);
    var template = zenPage.getTemplate();
    template.onevent(evtType,key,item.$findElement('').value,'mainView');
}

Zen Mojo does not provide a lot of special methods for this task. It involves some coding.