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Oke,

As Senthi said, I moved also on to the Validator in stead of constraint.
Pitty that I have to implement a validator in each VM where the customcomponent is used.

Greetz chill.

Oke,

As Senthi said, Oke found it.

The custom component is now like this :

<hbox align="center" id="${arg.id}">
    <textbox cols="9" ctrlKeys="^l" id="personId" 
        readonly="${arg.readonly}" tooltiptext="&gt;Ctrl + L&lt; will open search dialog ">
                    <custom-attributes validation="${arg.constraint}" />
            </textbox>
    <separator width="5px" />
    <textbox readonly="true" cols="30" id="name" tabindex="-1"/>
    <image src="/img/detail.png" id="detail" />
</hbox>

In the controller (extends HtmlMacroComponent implements IdSpace) :

private boolean checkConstraint = true;
private String constraint;

@Override
public void afterCompose() {
    super.afterCompose();
    Selectors.wireComponents(this, this, false);
    Selectors.wireEventListeners(this, this);
    constraint = (String) personId.getAttribute("validation");
    String s = null;
    personId.setConstraint(s);
}

    public PersonProxy getValue() {
    if (checkConstraint) {
        personId.setConstraint(constraint);
        try {
            personId.getValue(); // needed to throw the error message.
        } finally {
            String s = null;
            personId.setConstraint(s); // ambigious situation String-Constraint when entering null directly.
        }
    }
    return this.person;
}

When the ctrl+ctrl is pressed, I moved also on set the checkConstraint to the Validator in stead of constraint.
Pitty that false, and set back true when I have to implement a validator in each VM where the customcomponent is used.close the modal popup.

Greetz chill.

Oke found it.

The custom component is now like this :

<hbox align="center" id="${arg.id}">
    <textbox cols="9" ctrlKeys="^l" id="personId" 
        readonly="${arg.readonly}" tooltiptext="&gt;Ctrl + L&lt; will open search dialog ">
                    <custom-attributes validation="${arg.constraint}" />
            </textbox>
    <separator width="5px" />
    <textbox readonly="true" cols="30" id="name" tabindex="-1"/>
    <image src="/img/detail.png" id="detail" />
</hbox>

In the controller (extends HtmlMacroComponent implements IdSpace) :

private boolean checkConstraint = true;
private String constraint;

@Override
public void afterCompose() {
    super.afterCompose();
    Selectors.wireComponents(this, this, false);
    Selectors.wireEventListeners(this, this);
// some extra code
    constraint = (String) personId.getAttribute("validation");
    String s = null;
    personId.setConstraint(s);
}

 public PersonProxy getValue() {
    if (checkConstraint) {
        personId.setConstraint(constraint);
        try {
            personId.getValue(); // needed to throw the error message.
        } finally {
            String s = null;
            personId.setConstraint(s); // ambigious situation String-Constraint when entering null directly.
        }
    }
    return this.person;
}

When the ctrl+ctrl is pressed, I set the checkConstraint to false, and set back true when I close the modal popup.

Greetz chill.