Develop Reference

DataTable Fixed Header at page bottom (on first page load)

I have a DataTable with FixedHeader option that has the following initialization populated in my $(document).ready function. Both the headerOffset values that are jquery looked-up and hard-coded at 40 have been attempted, with the same results.
"fixedHeader": {
// "headerOffset": $("#top-navbar").outerHeight()
"headerOffset": 40
},
The DataTable is populated from an ajax call and has a series of my own render: functions on half of the columnDefs but I don't think that's related.
I'm not sure why, but the first time the page is loaded, the fixedHeader doesn't follow the top of the screen - but is sitting at the very bottom of the page below the table. When I click refresh - the header works just fine.
Any thoughts?
Thanks in advance.

I had the same problem, and in the absence of a satisfactory solution, my current workaround is to trigger a window resize event that will make the Datatable make rendering recalculations:
table.DataTable({
// ...
drawCallback: function() {
$(window).resize();
}
});

jQuery Plugin for Inline Balloon Popup Editor

(I don't quite know what to call this kind of control, so if someone can tell me what the name is, I'll edit the question for clarity.)
I'm looking for a jQuery control that will let me make a little pop-up editor that looks like a balloon coming out from a point in the form. In my use case, I'm tight on space and I want to let the user pick a couple of date ranges.
Something like this in the iCloud Calendar new event pop-up:

I ended up using qTip2 for jQuery:
http://qtip2.com/
But to get it to put a who div in there, I had to customize the JS a bit:
events: {
show: function(event, api) {
$("#tooltipContainer").html("");
$("#btnSelectDatesPopup").detach().appendTo("#tooltipContainer");
$("#btnSelectDatesPopup").show();
},
hide: function(event, api) {
$("#btnSelectDatesPopup").hide();
$("#btnSelectDatesPopup").detach().appendTo("#originalSelectDatesPopupContainer");
$("#tooltipContainer").html("<p>...</p>");
}
}
And on the form submit, close the tooltip if it's not closed already, and put it back into the DOM where it belongs:
// On form submit, trigger the tooltip hide to preserve user-chosen values
$("#aspnetForm").submit("submit", function(event) {
qtipApi.hide();
setTimeout(function(){}, 300);
});

Reinitializing jScroll after AJAX call? (Still loading old href after AJAX load)

I'm paginating search results returned from an AJAX call with jScroll:
$('#search').keyup(function() {
var search = $(this).val();
$.get('/search', {search : search}, function(results) {
$('.scroll-table').html(results);
$('.scroll-table').jscroll();
});
});
After making a new search, when I scroll to the bottom, jScroll loads the content of the last href for the old search.
So if my old _nextHref was /search?query=A&page=3 and I enter B in the search field, instead of loading /search?query=B&page=2 from the new href, it will load /search?query=A&page=3 from the old href.
Apparently calling jscroll() from the ajax success function won't reconstruct it and _nextHref stays set to its old value. I tried destroying it before loading it, but it will keep it fom loading altogether:
$('#search').keyup(function() {
var search = $(this).val();
$('.scroll-table').jscroll.destroy();
$.get('/search', {search : search}, function(results) {
$('.scroll-table').html(results);
$('.scroll-table').jscroll(); /* now jScroll won't load at all */
});
});
Can you please give me an example how to reinitialize jScroll so it loads the new href?

I found a temporary solution by commenting out the following line:
// if (data && data.initialized) return;
This caused a further problem.. If the result list fits a single page (no pagination needed so there is no href on the first page, "Loading..." is displayed on the bottom of the list, because jScroll wanted to GET "/undefined" from the server. Here is how i fixed it:
// Initialization
if (_nextHref != 'undefined') {
$e.data('jscroll', $.extend({}, _data, {initialized: true, waiting: false, nextHref: _nextHref}));
_wrapInnerContent();
_preloadImage();
_setBindings();
} else {
_debug('warn', 'jScroll: nextSelector not found - destroying');
_destroy();
return false;
}
I don't know if there is a better way to do this, but now it works with AJAX calls as I expect it to work. If anyone knows of a proper way to reinitialize the plugin, please share it with us.
UPDATE: I created a proper fork of jScroll allowing it to be reinitialized on each AJAX load, preventing it from loading the old href, using:
$('.scroll').jscroll({
refresh: true
});
Hopefully this functionality gets merged in the main version.

If you don't want to patch jScroll, you can clear the jScroll data in your load (or get) callback:
var pane = $('#myInfiniteScroll');
pane.load(url, function() {
pane.data('jscroll', null);
pane.jscroll({
nextSelector: "link[rel='next']",
autoTrigger: true,
});
});
When you call the jscroll function, pass the same parameters as when you first initialized it (in this example, I defined two configuration parameters, but use what you need.). Better yet, factor that out into its own function so you don't end up duplicating code.

DataTables: Confirm user wishes to page

We have a number of jQuery DataTables that all use server side processing. We have paging and sorting set up, and all is working well. In these tables there is at least one column of checkboxes to allow selecting of rows to do some kind of processing on. We want to confirm that the user wishes to page or sort if there are any checkboxes checked.
What I thought I could do (and can't)
"fnPreDrawCallback" : function(table) {
if (CullAddress.AddressIsChecked()) {
var $warningDiv = $('div#pageWarning');
var warningText = "One or more Addresses are selected for Excluding or Tagging. Are you sure you wish to nvaigate away?";
$warningDiv.find("div#pageWarningText").html(warningText);
$warningDiv.dialog({
resizable: false,
height: "auto",
width: "auto",
modal: true,
buttons: {
"Leave Page": function () {
CullAddress.resetWarningText();
$warningDiv.dialog('close');
},
"Stay On Page": function () {
CullAddress.resetWarningText();
$warningDiv.dialog('close');
return false;
}
},
});
}
},
Initially I thought this would be simple, but now, it is getting a bit hefty, and I am not sure of what the right way is. I am trying to use the fnPreDrawCallback, and initially I intended to create and display a jQueryUI Dialog, and have the buttons determine whether or not to return false; out of the callback thus staying on the page, or allowing the page/sort to go through.
I now understand that javaScript does not work that way. I suspect I will have to do the following, but before I go through that trouble I want to ask if there is a more concise (and reusable) way of doing this.
In fnPreDrawCallback, get properties to describe the intended set page/sort (e.g. offset, pageSize, sSortDir, iSortCol, etc).
Determine via dialog whether to continue or stay on page
Use aforementioned properties to construct the GET for the datatable to bypass the fnPreDrawCallback
Am I making this more difficult that it needs to be? Surely I am not the first person to want to do this, but for the life of me, I can find an example, or I cant figure out the keywords I should be searching for...
Any helps?

Link to working example: http://jsfiddle.net/6frQZ/3/
As already discussed in the comments to the question, I tried to circumvent the default behaviour of DataTables to fit your needs and created an example on jsFiddle to show, including numbered-pagination and sorting.
Basically, you'll need to unbind the event-handlers, that the DataTables - plugin binds to it's components, like so:
$('.dataTables_paginate a').unbind();
$('.dataTables_wrapper thead th').unbind();
Using .unbind without a parameter will unbind any event-listener on the element, so be careful when using this.
Gladly, the DataTables - API provides functions that let you call the internal paging and sorting-methods yourself, named fnSort (API-Link) and fnPageChange (API-Link).
To keep it simple, i just used a confirm - Box to ask for the user-interaction:
var userInteraction = confirm("Do you really want to change the page?");
if(userInteraction){
oTable.fnPageChange(dir);
$('.dataTables_paginate span a').unbind();
}
but all you'd need to do is call the DataTables-functions inside of your "Leave Page" - callback you already provided in the code.
Note: When it comes to the numbered buttons of the paging: It seems like DataTables regenerates those everytime the paging is changed, thus I need to unbind the event-Handlers again after every page-change.
The rest is simple yet not very elegant code, in which I just look for certain classes to know, what button was clicked or which state the sorting-header is in.
Excerpt:
var dir = "",
$this = $(this);
if($this.hasClass('previous')){
dir = "previous";
}else if ($this.hasClass('next')){
dir = "next";
}else if($this.hasClass('first')){
dir = "first";
}else if($this.hasClass('last')){
dir = "last";
}else{
dir = parseInt($this.text(),10)-1;
}

In jqGrid, how can I call a method after subGridRowColapsed completes?

I'm using jqGrid with subgrids and I'm looking for a way to call a method after I collapse a subgrid. Right now I have:
subGridRowColapsed: function (subgrid_id, row_id) {
position_slider();
}
My position_slider() method uses the grid height to reposition a slider element. The problem is that this is being called before the subgrid is actually collapsed, so the height of the grid has not yet been updated. How can I call this method after the subgrid is collapsed? I thought about using a short timeout, but that might not be reliable.
Thanks!

I found a solution. In the subGridRowColapsed, I trigger a reload of the grid and then in my gridComplete I call the function I wanted to be called after the subgrid was collapsed:
...
gridComplete: function () {
position_slider();
},
...
subGridRowColapsed: function (subgrid_id, row_id) {
$('#grid').trigger("reloadGrid");
}
...
Hopefully this helps anyone looking to do something similar.