Jens:
I’ve implement a SingleSelectionAjaxGrid that extends AjaxGrid. Actually, it’s
twice removed. :-) Anyway, I don’t think there’s any major changes in the
parent class. There’s a class variable for selectedObject and the following
override below ’toggleSelectionOfRow.’ The component has a api binding for
selectedObject.
/**
* Toggles inclusion of row into selectedObjects() (i.e. selects and
* de-selects it). This component can only have one selected row.
*/
public WOActionResults toggleSelectionOfRow() {
//row was already selected
boolean _rowWasPreviouslySelected = (selectedObjects() != null &&
selectedObjects().contains(row()));
selectedObjects().removeAllObjects();
if (! _rowWasPreviouslySelected) {
setSelectedObject(row());
selectedObjects().addObject(row());
} else {
setSelectedObject(null);
}
return null;
}
Also, in the wod, the tr for the row repetition has been updated as below. This
allows you to click anywhere in the tr to select.
TableRowAndToggler: AjaxUpdateLink {
action = toggleSelectionOfRow;
updateContainerID = configurationData.updateContainerID; // VALID
id = toggleRowSelectionID;
elementName = "tr";
class = rowClass;
style = rowStyle;
}
Hopefully, this helps you out.
Tim
UCLA GSE&IS
On May 7, 2014, at 9:15 AM, Chuck Hill <[email protected]> wrote:
> Hi Jens,
>
> On 2014-05-07, 1:59 AM, "Dipl.-Ing. Jens Lünstedt" wrote:
>
> Hello,
> for my AjaxGrid I have two questions. (I'm not very familiar with JavaScript)
> How to define a single row selection? (At the moment I can select and
> deselect multiple rows).
>
> You mean that you want to prevent the user from selecting more than one row?
> It does not support that. You probably could in JavaScript, but this is
> probably the wrong UI for what you are doing.
>
>
> How can I react on the selection and deselection event in my Java Class? The
> setSelectedObjects method is not called.
>
> You can’t directly, AjaxGrid does that.
>
> I think what you want is to have a link or button in each row that does
> something when activated. Otherwise you are trying to bend AjaxGrid to do
> something it was not intended for. Neither you nor your users are likely to
> be happy.
>
> First you need a grid configuration like this:
> * {
> * title = "Actions";
> * keyPath = ""; // Missing or
> empty keypath results in the current object itself being passed to component
> * component = "EmployeeActions"; // Name of
> WOComponent to be displayed in this column. Gets passed two bindings: value
> (Object),
> * // and grid
> (AjaxGrid) so that any other needed data can be accessed
> * cssClass = "alignCenter";
> * }
>
> Then in the component some simple HTML like:
> <span style="float:middle"><WEBOBJECT NAME="Remove"/></span>
>
> Then use a regular link or an Ajax one, depending on what you want to happen:
> Remove: WOHyperlink {
> action = remove;
> string = "Remove";
> }
>
> And implement the action method to do what you want.
>
>
> Chuck
>
>
>
>
> I can't find a description / example in the web.
>
> Thanks
> Jens
>
> UPDATE: I found a solution in checking the change of selectedObjects in
> public WODisplayGroup displayGroup()
> I don't know if that is a good solution but it works.
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