Drag and Drop; What row is my drop positon (ADF 11g)

Question

Hello!
I have a request for an drag and drop - site. First a test the technic with the examples in the web - great feature, but by my request i have one great problem.
facts:
two pannels, in all pannels are one af:table with different data controls
- in the first pannel/table (source) i defined on a column a client attribute and the attributeDragSource
- in the second pannel/table (goal) i defined on a PanelGroupLayout (surround a column) the dropTarget (inclusive dataFlavor)
I definied a session-scope class and write the methode "public DnDAction handleItemDrop(DropEvent dropEvent)"
Till then its work sucessful - the methode will be called and the transfer data can be read.
problem:
- I need the row for the drop position (for manual queuing).
- I have found the component, the id of the component, the x and y - position of the drop.
- A try with the current row of the IteratorBinding what returned the last marked row in the table, not the drop-position.
I need a key (at best the value of a row.binding.Value) of the drop position in the table.
Any idea - a simple code example?
Harald

Answer 1

Hi!
My problem was not the correct component ... this information was already available, my problem was the correct row in the component.
In the meantime I have found a result, i not sure it´s the best, but it works.
    public DnDAction handleItemDrop(DropEvent dropEvent) {
        System.out.println("demo1.java - handleItemDrop");
        try {
            DataFlavor<Number> d = DataFlavor.getDataFlavor(Number.class);
            //get drag Value
            Number dragValue = dropEvent.getTransferable().getData(d);
            if (dragValue == null)
                return DnDAction.NONE;
            else {
                // get the current record
                ELContext elContext = FacesContext.getCurrentInstance().getELContext();  
                // creating value expression with the help of the expression factory and the ELContext  
                System.out.println("Component/Id of the drop value:"+dropEvent.getDropComponent().getId());
                System.out.println("Value of the drop value (PK of the row):"+dropEvent.getDropComponent().getValueExpression("value").getValue(elContext));
                // and now work with the available data
                return DnDAction.COPY;
        } catch (Exception ex) {
            System.out.println("item drop failed with : " + ex.getMessage());
            return DnDAction.NONE;
    }