setReadOnly(boolean)

[Former Member]

I've got some elements in my view layout that have their readOnly property linked to a context element.

Now, in the wdDoModifyView method, I want to set some elements readOnly property to true.

((IWDAbstractInputField) uiEl).setReadOnly(true)

However, this gives problems for those elements whose readOnly property is linked with a context element.

java.lang.NullPointerException
at com.sap.tc.webdynpro.clientserver.data.DataContainer.removePendingUserInput(DataContainer.java:1231)
at com.sap.tc.webdynpro.clientserver.data.DataContainer.setBoolean(DataContainer.java:891)
at com.sap.tc.webdynpro.clientserver.uielib.standard.impl.AbstractInputField.setReadOnly(AbstractInputField.java:724)
at com.carrefour.be.evere.msstime.uiinput.UIInputInterface.disableUIElement(UIInputInterface.java:146)
at com.carrefour.be.evere.msstime.uiinput.UIInputInterface.disableUIElement(UIInputInterface.java:139)
at com.carrefour.be.evere.msstime.uiinput.UIInputInterface.disableUIElement(UIInputInterface.java:130)

[Former Member · Accepted solution]

Why do you do this inside wdDoModifyView() at all? Just set the value of the context attribute to which the "readOnly" property is bound in the event handler.

Armin

[Former Member · Accepted solution]

Armin,

because it has to be a generic method, that can be used by different DCs. Depending on an application parameter, this method will or will not be called in wdDoModifyView.

[Former Member · Accepted solution]

That's no reason to do it inside this method which should only be used to change the view structure.

Armin

[Former Member · Accepted solution]

Should it be called in wdDoInit() then?

[Former Member · Accepted solution]

Not necessarily in wdDoInit(), but maybe in some event handler or inbound plug? Difficult to say without knowing the scenario.

Armin

[Former Member · Accepted solution]

Ok, but that still leaves the initial question open.

[Former Member · Accepted solution]

The answer is: Set the value of the context attribute inside the correct method which is not wdDoModifyView().

Armin

[Former Member · Accepted solution]

Have you seen the code I posted? I want to loop over all view elements, without even wondering whether their properties are linked to context attributes.

[Former Member · Accepted solution]

Ok, I think I understand what you are trying to do.

The error is caused by an attempt to store a boolean value in a non-existing context attribute. This may happen for example, if the attribute is part of a non-singleton node without parent element.

I'm not sure if this is a bug in your release but in any case a better exception than a NPE should be thrown.

Armin

[Former Member · Accepted solution]

> I'm not sure if this is a bug in your release but in

> any case a better exception than a NPE should be

> thrown.

>

How would you solve the problem?

[Former Member · Accepted solution]

These views, that are switched to read-only by the generic code, belong to certain Web Dynpro components.

Wouldn't it be possible to define the needed context bindings in these views and just offer a method on their component interface to set the read-only state? Then you would not have to traverse views generically, you would just have to call one method.

Or are these views from completely "foreign" Web Dynpro components?

Armin

[Former Member]

Lakshmi,

public void disableUIElement(com.sap.tc.webdynpro.progmodel.api.IWDUIElement uiEl ) {

//@@begin disableUIElement()
if (uiEl instanceof IWDUIElementContainer) {

    IWDUIElement[] elements = ((IWDUIElementContainer) uiEl).getChildren();
    List l = Arrays.asList(elements);
    Iterator i = l.iterator();
    while (i.hasNext()) {
        disableUIElement((IWDUIElement) i.next());
    }
}
else if (uiEl instanceof IWDTable) {

    IWDTableColumn[] cols = ((IWDTable) uiEl).getColumns();
    List l = Arrays.asList(cols);
    Iterator i = l.iterator();
    while (i.hasNext()) {
        IWDTableColumn tc = (IWDTableColumn) i.next();
        disableUIElement((IWDUIElement) tc.getTableCellEditor());
    }
}
else if (uiEl instanceof IWDAbstractDropDown) {

    ((IWDAbstractDropDown) uiEl).setEnabled(false);
}
else if (uiEl instanceof IWDAbstractInputField) {

    ((IWDAbstractInputField) uiEl).setReadOnly(true);
}
else if (uiEl instanceof IWDAbstractButton) {

    ((IWDAbstractButton) uiEl).setEnabled(false);
}
//@@end
}

public static void wdDoModifyView(...)  {
    wdThis.wdGetUIInputInterface().disableUIElement((IWDUIElement view.getRootElement());
}

[Former Member]

hi,

Check the id of the inputField which you are passing while creating the instance of IWDAbstractInputField. Else use the following:

IWDAbstractInputField inp = (IWDAbstractInputField) viewObj.getElement("InputField");

inp.setReadOnly(true);

thanks & regards,

Manoj

[Former Member]

Manoj, same error.

[Former Member]

Hi

Can u send me complete code..

Try using IWDInputFiled inplace of IWDAbstractInputFiled

Regards

LakshmiNarayana