Develop Reference

Saving the highlighting of current row in Oracle Apex Classic Report after closing the dialog window

Good evening to everybody here!
At this moment I'm working with one page in Oracle Apex (version 4.2.6.00.03). It consists of two Classic Reports — the first is a "master" one, and the second contains "details" of the former. Also there are several buttons for performing actions of inserting/updating/deleting the data. My purpose is not only to make the actions work and "details" report to refresh on choosing the row from the "master" one (I've completed these tasks), but also to manage to save the highlighting of reports' rows even after performing the actions (not only just refreshing the page).
Now I'll explain what I've already done. One can choose the row (and simultaneously highlight it) by means of the script I put in every Report's footer and it looks like this:
<script>
$(".t20data","#master_report").live("click",function(){
chooseMST($(this).find("span.MASTER").attr("id"));
});
</script>
There master_report is an ID of "master" report's region and MASTER stands for span class, in which I wrap all the cells in report to keep the value of row's ID. The function chooseMST is this:
function chooseMST(docID){
$.post('wwv_flow.show',
{'p_request' : 'APPLICATION_PROCESS=SET_MASTER',
'p_flow_id' : $v('pFLowId'),
'p_flow_step_id' : $v('pFlowStepId'),
'p_instance' : $v('pInstance'),
'x01' : docID},
function(data){
//refreshes "details" report
$('#detail_report').trigger('apexrefresh');
//deletes color from all the rows of "master" report
$(".t20data","#master_report").parent("tr").children().css("background-color","#F2F2F5");
//highlights the chosen row in "master" report
$("#" + String(docID)).parent("td").parent("tr").children().css("background-color","#A3BED8");
}
);
}
The action (say, AJAX callback) SET_MASTER is this:
begin
--clears the choice from "detail" report
APEX_UTIL.SET_SESSION_STATE(P_NAME => 'P400_DETAIL_RN'
,P_VALUE => NULL);
--makes the choice from "master" one
APEX_UTIL.SET_SESSION_STATE(P_NAME => 'P400_MASTER_RN'
,P_VALUE => APEX_APPLICATION.G_X01);
end;
To say about refreshing the page, I solved the problem of clearing the hidden items P400_DETAIL_RN and P400_MASTER_RN by having a process which goes before header with this PL/SQL code:
begin
:P400_DETAIL_RN := APEX_UTIL.GET_NUMERIC_SESSION_STATE(P_ITEM => 'P400_DETAIL_RN');
:P400_MASTER_RN := APEX_UTIL.GET_NUMERIC_SESSION_STATE(P_ITEM => 'P400_MASTER_RN');
end;
and the Javascript function recolorRows which is executed every time the page is loading:
function recolorRows(){
$(".t20data","#master_report").parent("tr").children().css("background-color","#F2F2F5");
if($("P400_MASTER_RN").val() != "") $("#" + String($("P400_MASTER_RN").val())).parent("td").parent("tr").children().css("background-color","#A3BED8");
$(".t20data","#detail_report").parent("tr").children().css("background-color","#F2F2F5");
if($("P400_DETAIL_RN").val() != "") $("#" + String($("P400_DETAIL_RN").val())).parent("td").parent("tr").children().css("background-color","#A3BED8");
}
The code concerning rows from "details" report is alike, so let me omit this part. Problems begin for me from performing the actions of manipulating the data. Here is the function which opens the dialog window for inserting or updating the row chosen in "master" report:
function MST_open(action){
//the part of code which finds out with what parameteres we should call the dialog window
$("#dialogFrame").attr("src",stringToCall);
$("#dialogWindow").dialog({
title:windowName,
modal:true,
width:500,
height:500,
resizable:true,
close:reloadMST //the action on closing the window
});
}
The code of reloadMST looks as follows:
function reloadMST(){
$("master_report").trigger('apexrefresh');
$("detail_report").trigger('apexrefresh');
}
And the Javascript function, which executes in the dialog window on the certain button click (for example, "Update"), is this:
function mstUpdate(){
$.post('wwv_flow.show',
{'p_request' : 'APPLICATION_PROCESS=MASTER_UPDATE',
'p_flow_id' : $v('pFLowId'),
'p_flow_step_id' : $v('pFlowStepId'),
'p_instance' : $v('pInstance'),
'x01' : apex.item("P402_SNAME").getValue()},
function(data){
//returns the ID of updated row in "msg" part of "res" variable
var res = eval("(" + data + ")");
if(res.status != "OK"){
//the code which catches the error, if it appears
} else {
parent.MST_close(res.msg);
}
}
);
}
where MST_close is this:
function MST_close(docID){
$("#dialogWindow").dialog("close");
//see this function above
chooseMST(docID);
}
So, this is a chain of Javascript and PL/SQL actions, which concerns the updating of the row from "master" report. The actions of inserting/updating/deleting the data work great, but I can't say the same about the saving of rows' color. The latter works good while I'm only choosing rows or refresh the page, but after performing, for example, the updating, the current row loses its highlighting. By debugging (say, adding the function console.log in Javascript code) I found out that the chain of actions, which must lead to saving the highlighting, executes nominally, but it looks like refreshing the report either goes after coloring or just prevents the latter.
Thus, my question is this: is there any way to save the highlight of the current row even after opening and closing the child dialog window?

I think that the problem is that after you update the value of a record in the modal window you refresh the data in the 2 reports in the main page and so you lose the highlight.
To fix this try to create a Dynamic Action on the event After Refresh on Region: Your Classic Reports that will execute the javascript function recolorRows(). You can also do it with javascript. The main ideea is that after you refresh the 2 reports (using reloadMST() or other method) you must trigger recolorRows().

Thank you, Cristian_I, very much. I've recently solved my problem. My mistake was that I hadn't done the hidden items binding in HTML-code - in other words, by means of Javascript only. Watching the behaviour of the hidden items, I'd discovered that when I tried to find their value with the help of jQuery function $("#hidden_item").val(), I got the previous values, but not the current ones (i.e. session state values). So that's why I had the highlighting unstable.
In addition to Dynamic Actions triggering right after refreshing the reports, I should have just add these strings to my function chooseMST before the "coloring" code itself:
$("#P400_MASTER_RN").val(docID); //binding to exact string
and
$("#P400_DETAIL_RN").val(""); //clearing the choice in the "details" report.
Due to this the problem with recoloring the rows have just gone away! Thus, now my page works excellent: the highlighting is stable, and even new rows are highlighted right after inserting them.

jQuery DataTable : Delete row and reload

Now, I am working with jQuery DataTable. Everything is going well in intializing data tables with javascript data array.
In my table, it included remove row button. When I clicked the Remove button of each row, I delete record using following function.
function removeRow(itemList, recordIndex){
itemList.splice(recordIndex, 1);
dataTable.clear();
dataTable.rows.add(itemList);
dataTable.columns.adjust().draw(false);
}
This function performed well with no error. At that, I set false to draw() function to prevent going to first page when delete records in any other page.This one also working for me.
The problem is, when my itemList has 11 records, and I go to second page of data table and delete the 11th record.
So, my itemList will left only 10 record and My data table should show the first page of paging.
But, jQuery data table is not doing that. It still have in second page with no records.
I don't know how to fix that one. I want to show previous page after delete every records from current page.
I know `draw()`` function without false parameter will go to first page. But it go to first page in every deletion.
I only want to go to previous page, when I deleted all records from current page.
Please, help me. Thanks.

I found an hacky way to get the previous pagination when the current has been emptied.
It is specific to jQuery DataTable, since using it's class naming.
Try it in CodePen.
function removeRow(recordIndex){
// Get previous pagination number
var previousPagination= parseInt( $(document).find(".paginate_button.current").data("dt-idx") ) -1;
// Splice the data.
data.splice(recordIndex,1);
myTable.clear();
myTable.rows.add(data);
myTable.columns.adjust().draw(false); // May ajust the pagination as empty... `.draw(false)` is needed.
// Decide to redraw or not based on the presence of `.deleteBtn` elements.
var doIdraw=false;
if($(document).find(".deleteBtn").length==0){
doIdraw=true;
}
myTable.columns.adjust().draw(doIdraw); // Re-draw the whole dataTable to pagination 1
// If the page redraws and a previous pagination existed (except the first)
if(previousPagination>1 && doIdraw){
var previousPage = $(document).find("[data-dt-idx='" + previousPagination + "']").click();
}
// Just to debug... Console.log the fact that only one pagination is left. You can remove that.
if(previousPagination==0 && doIdraw){
}
}
Notice that I used:
#myTable as the table id
.deleteBtn as the delete buttons class
data as the dataTable data
I removed all console.log() and example related code in the code above (but not in CodePen).
"Delete this →" button handler is:
$("#myTable").on("click",".deleteBtn",function(){
var rowElement = $(this).closest("tr");
var rowIndex = myTable.row(rowElement).index();
removeRow(rowIndex);
});

How to refresh DataTables after call to page event?

Here is my scenario ...
I am using pagination with DataTables. My first column is css styled based upon data that is passed in. So, I display the correct colored icon for the property of the item in the table. Everything on page 1 displays correctly. Just doing the basics, everything on further pages does not get displayed because it is removed from the DOM at that time.
So, I did $('#my_id').on('page.dt', function() {perPageFunctionCall();}).dataTable(so on an so forth)}; to call a function which selects the correct colored flag.
When I click on page 2, nothing gets updated. I click on page 1 again and it redisplays the 1st page correctly. I click on page 2 a second time now and it displays everything correctly this time.
So what is causing the display not to update with my new css the 1st trip but to display properly on subsequent trips? Is there someway to refresh the element or the data table after I am done with my css manipulation?

Well it is one of two things:
Either it is
1: I added
.on( 'order.dt', function () { perPageFunctionCall(); } )
.on( 'search.dt', function () { perPageFunctionCall(); } )
in addition to my page function call.
But more likely everyone's favorite reason:
2: Caching
In either case, it does work flawlessly now as expected.

for refresh resp. table :
var path = "/server_processing.php";
var dt = $('#tableid').DataTable();
dt.clear();
dt.draw();
dt.ajax.url(path).load()

How to update ZK Grid values from jQuery

I have three Tabs and in each tab, I have a Grid.
The data for each Grid is coming from a database, so I am using rowRenderer to populate the Grids. The following code is common for all three Grids:
<grid id="myGrid1" width="950px" sizedByContent="true" rowRenderer="com.example.renderer.MyRowRenderer">
The rows are constructed from Doublebox objects. The data is populated successfully.
The Problem:
I need to handle multiple-cell editing on the client side. The editing is done via mouse-clicking on a particular cell and entering a value.
As example let's say that the user edits first cell on the first row and the value should be
propagated to all other cells on the same row and in all three Grids (so also the two Grids which the user currently does not see, because they are in tabpanes).
I am using jQuery to do this value propagation and it works OK.
I am passing the jQuery as follows:
doublebox.setWidgetListener(Events.ON_CHANGING, jQuerySelectors);
doublebox.setWidgetListener(Events.ON_CHANGE, jQuerySelectors);
This makes it possible to change the value in 1 cell and the change is instantly (visually) seen in all other cells filtered by jQuery selectors.
The problem is that the value is visually distributed to all the cells, but when I try to save the Grid data back to the database, the background values are the old ones.
I am assuming that ZK-Grid component is not aware that jQuery changed all the cell values. Nevertheless if I manually click on a cell that already has the NEW value (enter/leave/change focus) when I save the grid the NEW value is correct in that particular cell. Maybe that's a hint how can I resolve this.
Code of how I extract the Grid values:
Grid tGrid = (Grid) event.getTarget().getFellow("myGrid1");
ListModel model = tGrid.getModel();
MyCustomRow tRow = (MyCustomRow)model.getElementAt(i);
The model for my Grid is a List of MyCustomRow:
myGrid1.setModel(new ListModelList(List<MyCustomRow> populatedList));
I have a couple of assumptions, but whatever I have tried, hasn't worked. I have in mind that jQuery events and ZK-Events are different and probably isolated in different contexts. (Although I have tried to fire events from jQuery and so on..)
Do you have any suggestions? As a whole is my approach correct or there's another way to do this? Thanks for your time in advance!

Your problem is exactly what you are expecting.
Zk has it's own event system and do not care about your jq,
cos it's jq and zk don't observ the DOM.
The ways to solve your problem.
Use the "ZK-Way":
Simply listen at server-side and chage things there.
I am not sure if not selected Tabs
are updateable, but I am sure you could update the Grid
components on the select event of the Tab.
Fire an zk-event your self:
All you need to know, is written in the zk doc.
Basically, you collect your data at client side, send
an Event to the server via zAu.send() extract the
data from the json object at serverside and update your Grids
I would prefer the first one, cos it's less work and there should not be
a notable difference in traffic.

I post the solution we came up with:
This is the javascript attached to each Doublebox in the Z-Grid
//getting the value of the clicked cell
var currVal = jq(this).val();
//getting the next cell (on the right of the clicked cell)
objCells = jq(this).parents('td').next().find('.z-doublebox');
// if there's a next cell (returned array has length) - set the value and
// fire ZK onChange Event
if (objCells.length) {
zk.Widget.$(jq(objCells).attr('id')).setValue(currVal);
zk.Widget.$(jq(objCells).attr('id')).fireOnChange();
} else { //otherwise we assume this is the last cell of the current tab
//So we get the current row, because we want to edit the cells in the same row in the next tabs
var currRow = jq(this).parents('tr').prevAll().length;
//finding the next cell, on the same row in the hidden tab and applying the same logic
objCellsHiddenTabs = jq(this).parents('.z-tabpanel').next().find('.z-row:eq(' + currRow + ')').find('.z-doublebox');
if (objCellsHiddenTabs.length) {
zk.Widget.$(jq(objCellsHiddenTabs).attr('id')).setValue(currVal);
zk.Widget.$(jq(objCellsHiddenTabs).attr('id')).fireOnChange();
}
}
The java code in the RowRenderer class looks something like this:
...
if (someBean != null) {
binder.bindBean("tBean", someBean);
Doublebox box = new Doublebox();
setDefaultStyle(box);
row.appendChild(box);
binder.addBinding(box, "value", "tBean.someSetter");
...
private void setDefaultStyle(Doublebox box) {
box.setFormat("#.00");
box.setConstraint("no negative,no empty");
box.setWidth("50px");
String customJS = ""; //the JS above
//this is used to visually see that you're editing multiple cells at once
String customJSNoFireOnChange = "jq(this).parents('td').nextAll().find('.z-doublebox').val(jq(this).val());";
box.setWidgetListener(Events.ON_CHANGING, customJSNoFireOnChange);
box.setWidgetListener(Events.ON_CHANGE, customJS);
}
What is interesting to notice is that ZK optimizes this fireOnChange Events and send only 1 ajax request to the server containing the updates to the necessary cells.

Javascript, Jquery, Cross browser issues, Frustration

I am a predominantly PHP developer. I realize in this day and age specialization in one scripting language doesn't cut it, but the fact remains that my skills at JavaScript and jQuery are pretty green. I am a novice at best. I can create my own code but Cross Browser compatibility remains a huge issue with my work in JavaScript.
Anyway, I have a script that filters products according to categories/subcategories. This is how it works: you select a category and the javascript in the background does its thing to filter the subcategories so that the options displayed are the ones pertaining to the parent category- a combination of these two filters the product line.
Here is my code:
function scategories(){
//get the category option value from the category drop down bar
var cat = (document.getElementById('categories').value);
//get all the options from the subcategory drop down bar
var subcat = document.getElementsByClassName('subcategories');
var n=0;
//if the category bar option is set to 0 display everything
if(Number(cat)==0){
Show();
}
//filter the subcategories
while(subcat.item(n)){
//if there is no match b/w the subcategories option and the categories id FILTER
if(Number((subcat.item(n).value).split('|')[1]) != Number(cat) && Number(subcat.item(n).value) != 0){
document.getElementsByClassName('subcategories')
.item(n)
.style
.display="none";
}else{
//else display the subcategory
document.getElementsByClassName('subcategories')
.item(n)
.style
.display="list-item";
}
n++;
}
}
This code is pretty self explanatory I would say. I also have a shiftfocus function that shifts the focus from the current option selected in the subcategory to the default one which is 'none' whenever a new category is picked. This basically resets the subcategory.. here's the code:
function shiftfocus(){
document.getElementsByClassName('subcategories')
.item(0)
.removeAttribute("selected");
document.getElementsByClassName('subcategories')
.item(0)
.setAttribute("selected","selected");
}
Shiftfocus is called onChange and scategories is called onClick.
Problem 1:
1) Firefox: Shiftfocus doesn't shift the focus to the default option even though I can see it adds the 'selected' attribute.
2) Safari: Does not work at all.
EDIT: Problem 2 was the product of a careless mistake. I left open an anchor tag which was
creating havoc in IE. Should have double checked before bothering you
guys. Sorry. Problem 1 still persists.
Problem 2:
I understand none of us developers particularly like internet explorer. But I am willing to believe I have made a mistake here. I have some jQuery that fetches data from a script in another file via the native POST function and appends it to a table with the id "content". This works fine on every browser, except IE. If I try going back to IE 7,8 compatibility mode the results are a little better (the data shows up broken in pieces though) and in IE9 compatibility mode nothing is appended at all! Here's the code:
$.post("bagcontents.php", {
"Bid": $(this).attr('bid')
},
function(data){
$("#content").empty().append(data);
roundNumber();
$('#processorder_hidden').attr('value',currentBid);
});
//append here
<div id="contents" style="overflow:auto;height:345px;padding-right:5px;">
<form name="bag_contents" id="bag_contents" method="post" action="<?php _page ;?>">
<table id="content">
</table>
<input type="hidden" id="bag_contents_hidden" name="bag_contents_hidden" value="1" />
</form>
</div>
Any help will be appreciated. I tried outputting the fetched results with alert, alert(data), and the script is fetching everything just fine. Its the just the append part that fails :|

Here are some suggestions and hope you find them somewhat useful.
Problem: 1
Instead of having the shiftfocus() set the to a specific value, have you tried using .val('') just to clear it out. I can imagine that this will default to the first option.
Problem: 2
This will be hard to debug without knowing what data is coming back from the server. Might be bad formatting or some syntax error on the rendered output.