APEX 4.0 Getting gReport is undefined when pulling IR report from Page2

Question

The below function used work perfectly in APEX 3.2 for
Pulling Page2 IR Report into Page1 Region having <div id="XXHOLDER">
<div>
but in APEX 4.0, I am getting "gReport is undefined" when I click on IR Toolbar/Control panel like Action or Go
function periodRep(){
$.ajax({
type: "POST",
url: "wwv_flow.show",
data: {
p_flow_id : $v('pFlowId'),
p_instance : $v('pInstance'),
p_flow_step_id : "2",
p_request : ""
dataType : "html",
success : function(data){
var startTag = '<apex2ajax>';
var endTag = '</apex2ajax>';
var start = data.indexOf(startTag);
if (start > 0) {
data = data.substring(start+startTag.length);
var end = data.indexOf(endTag);
data = data.substring(0,end);
$("div#XXHOLDER").html(data);
$x_Value('pFlowStepId', "2");
if($('#apexir_CONTROL_PANEL_COMPLETE').length > 0){
if(!($('#apexir_CONTROL_PANEL_COMPLETE').css('display') == 'none')){
gReport = new apex.worksheet.ws('');
gReport.toggle_controls($x('apexir_CONTROL_PANEL_CONTROL'));
}); //ajax
}//periodRep
Please help
Thanks
-Senthil K

Answer 1

Hi Senthil,
I think that the reason this no longer works is due to internal changes we made to the Interactive Report JavaScript. These changes affected both how the IRR JS file was added to a page and also how the gReport variable is initialised.
I would like to give you a few pointers as to what's changed and how you can get this working, but please bear in mind that doing these types of customisations is always going to be risky, due to the fact undocumented HTML that we output is always subject to change in future releases of APEX and cannot be relied upon as remaining the same.
In 4.0, the IRR JS file is only included on a page where there is an IRR, so you're page 2. And unfortunately, due to the way you crop your response from page 2, this file is not being included in page 1 after the PPR. You therefore either need to change the way you crop the success data, or just include the apex_interactive_reports_4_0.js file on your page 1.
Also in 4.0, we have also cleaned up a lot of initialisation JS code that we used to emit inline, that is now added at the end of the web document in a jQuery 'ready' handler. 1 such example of this code was the initialisation of the gReport variable in IRRs. This used to be emitted inline and was actually included inside of the snippet you crop within page 2 response. Which was all good. Now though, because this is done at the end of the response, which is outside of what you crop, this is no longer executed. Try adding the following initilialisation at the end of you 'success' callback:
gReport = new apex.worksheet.ws('');
gValid = new apex.validation.v();Again, to re-iterate!! Internal and undocumented code such as this is always subject to change and should not be relied upon as remaining the same in future releases of APEX. Only supported APIs and methods should be relied upon as being backwards compatible.
Anthony.
Edited by: Anthony Rayner on Jul 26, 2010 5:46 PM