Can't Set Selected Row in Grid

[nlk10010]

I have a read-only grid with an editable detail part. In each grid row is a button that executes an Ajax Callback which returns the following javascript:

		
var rowNum = {grid.Object}.getRowsInGrid();
{grid.Object}.setSelectedRow(rowNum);

which, I believe, should select the last row in the currently-displayed page (I actually want to do something more complicated which will end up with a particular row being selected but in order to narrow things down I thought I'd simply try to select a specific row). Now, say I'm in the third row of the grid and click the button: what I think I can see happening is that upon return from the callback the last row is BRIEFLY selected but then the highlight returns to the third row. I can try swapping setFocus for setSelectedRow and it doesn't make any difference.

Has anyone run into anything like this before (searching these Boards has turned up nada)?

Thanks in advance.


Norman

[Davidk]

Re: Can't Set Selected Row in Grid

I'm not seeing this behaviour in either 2999 or the current pre-release. The code posted does exactly what you're expecting... so... you must have something else going on that is returning focus to the original row.

Try this. Put your code into a Javascript function named setLastRow, but wrap your code with a setTimeout...

function setLastRow(){

	setTimeout(function(){
		var rowNum = {grid.Object}.getRowsInGrid();
		{grid.Object}.setSelectedRow(rowNum);
	},5000);

}

In your Ajax Callback return, instead of executing your code, execute the function

myAjaxCallback = "setLastRow();"

This should let whatever else you have going on settle down, and then in 5 seconds your last row should be set.

[nlk10010]

Re: Can't Set Selected Row in Grid

David: Thanks, I certainly will consider following your advice, but I've done some further testing and this code DOES work fine, at my end, when the grid is not read-only. It's when my grid is read-only and has an editable detail part that it fails. Looking at FireBug it seems that the grid sends a number of callbacks after mine completes, one of which is "Synchronize Detail View" or something like that, that sets up the row that was selected before I clicked the button, wiping out my javascript positioning.

Have you tried this in the read-only grid case?

[Davidk]

Re: Can't Set Selected Row in Grid

Sorry... I forgot about the Detail View part. All looks ok if the grid is read-only. However, things are different when working with a detail view. It doesn't seem to matter what your Detail View property "Method to Display Detail View" is set to. But, you must use {grid.Object}.detailView(rowNum); instead of .setSelectedRow.

Further, when using a detail view, .getRowsInGrid() always returns 0. So... use a property of the {grid.Object} to get your count. You can use either property below... they both return the page row count. I don't know if these counts include deleted rows... so you'll have to test that.

//var rowNum = {grid.Object}._rowsInGrid;
var rowNum = {grid.Object}.actualRowsOnPage;
alert(rowNum);
//{grid.Object}.setSelectedRow(rowNum);
{grid.Object}.detailView(rowNum);

[nlk10010]

Re: Can't Set Selected Row in Grid

Geez, where do you get this stuff? Is it documented anywhere or are we supposed to just "divine" it somehow? :) One of the downsides of Alpha, just isn't much out there in terms of resources if it's not in the docs.

Anyway, I can't wait to try it and will certainly get back if there are issues.

Regardless, thanks very much for sharing your expertise.

[nlk10010]

Re: Can't Set Selected Row in Grid

Just as a follow-up: What I actually wanted to do was to go to the last page of the grid and search for a specific key. So my plan was to issue the javascript: {grid.Object}.DetailViewLastRecord(); , then loop through the rows in the grid until I found the row number containing the key I wanted, then do {grid.Object}.DetailView(rowNum). What I found was that the {grid.Object}.DetailViewLastRecord() WAS executed, but basically last, and my looping and {grid.Object}.DetailView(rowNum) was either lost or probably executed before the page navigation.

So, thanks to you, I did learn (or re-learn) some Alpha javascript dealing with read-only grids and detail views, but the asynchronous nature of the callbacks and javascript royally mucks things up. Well, at least it's not just me (I think). :)

Thanks again, David.