📄 b30-1876198.zul
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<?init class="org.zkoss.zkplus.databind.AnnotateDataBinderInit" ?>
<window>
<html><![CDATA[
<p>1. Don't do anything.</p>
<p>2. It is OK if you did not see "Empty is not allowed" on the right of the textbox.</p>
]]></html>
<zscript>
public class MyConstraint extends SimpleConstraint implements CustomConstraint {
public MyConstraint() {
super(NO_EMPTY);
}
public void showCustomError(Component comp, WrongValueException ex) {
comp.getFellow("errlb").setValue(ex.getMessage());
}
}
MyConstraint ms = new MyConstraint();
</zscript>
<textbox value="@{val}" constraint="${ms}"/>
<label id="errlb"/>
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