answered 2024-01-30 18:11:06 +0800

AndreiArdei
111 ● 3

Hi, yes I'll try to explain this a little bit better. We are currently running ZK 9.6.0.1.

getElementAt()

let me explain first the setElementAt. Turns out i made a mistake and it's called getElementAt. We use it to get a reference to the list. We have a model class which extends ListModelList<Object> from ZK. We store data in the form of a java List of objects (to create the impression of a table). The main code to set the value looks as follows:

if (getElementAt(row) instanceof List)
{
        // This method is from org.zkoss.zul.ListModelList.getElementAt(int j)
        vector = (List<Object>) getElementAt(row); 
        vector.set(col, aValue);
}

Steps to reproduce

I will use the images above to explain Have a Listbox with multiple = true. When no row is selected, it looks "uneditable" to the user. When you select a row, certain columns in that row become editable, for a user to change the value. This value is computed when the user selects the row, by listening to the on select and then calling the code to run the above code snippet.

Current behaviour

If you deselect a checkmark, ZK fires only one event (the deselect event) to the server (which we use to hide the editor, make calculations etc). However, on front-end it looks like you de-select the checkmark and you re-select it again, confusing users as to if the row is selected or not. If you click again (on what now looks as a selected checkmark) it fires an event, but the server already is aware that the row is deselected (from the first click). This then fixes the front-end too.

Expected behaviour

If you de-select a checkmark, the checkmark stays de-selected on the first click.

Additional information

If we comment out the part where we set a new value in code, then we cannot reproduce this behaviour on rows. However, we were able to reproduce this without our special code to set values on the "select all" checkmark which is part of the header. In our configuration this one always looks like a double selection