Examples of org.zkoss.zul.Constraint

org.zkoss.zul.Constraint
A constraint. Instead of implementing this interface, you may use {@link SimpleConstraint} if applicable.
To have better responsiveness, you can handle all (or some) validation at the client by implementing an additional interface, {@link ClientConstraint}.
If you prefer to have a custom way to display the error message (other than the default error box). You can also implement {@link CustomConstraint}. Then, {@link CustomConstraint#showCustomError} is called instead ofshowing the default error box.
Since 5.0.0, {@link ClientConstraint} takes higher priorityif both implemented. @author tomyeh @see CustomConstraint @see ClientConstraint

        };
        return newConstraint;
    }


    public Constraint distinctNames() {
        Constraint newConstraint = new Constraint() {
            @Override
            public void validate(Component comp, Object value)
                    throws WrongValueException {
                if (((String) value).isEmpty()) {
                    throw new WrongValueException(comp,

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    /**
     * Operations to filter the orders by multiple filters
     */
    public Constraint checkConstraintFinishDate() {
        return new Constraint() {
            @Override
            public void validate(Component comp, Object value)
                    throws WrongValueException {
                Date finishDate = (Date) value;
                if ((finishDate != null)

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            }
        };
    }


    public Constraint checkConstraintStartDate() {
        return new Constraint() {
            @Override
            public void validate(Component comp, Object value)
                    throws WrongValueException {
                Date startDate = (Date) value;
                if ((startDate != null)

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                @Override
                public void set(String value) {
                    orderElement.setCode(value);
                }
            });
            textBoxCode.setConstraint(new Constraint() {
                @Override
                public void validate(Component comp, Object value)
                        throws WrongValueException {
                    if (!orderElement.isFormatCodeValid((String) value)) {
                        throw new WrongValueException(

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        unit.removeRequiredCriterion(criterion);
        Util.reloadBindings(component.getParent().getParent());
    }


    public Constraint validateEndDate() {
        return new Constraint() {
            @Override
            public void validate(Component comp, Object value)
                    throws WrongValueException {
                validateEndDate(comp, value);
            }

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        final Tree tree = (Tree) orderElementsTree.getFellowIfAny("tree");
        tree.setTreeitemRenderer(orderElementsTree.getController().getRenderer());
    }


    public Constraint validateTemplateName() {
        return new Constraint() {
            @Override
            public void validate(Component comp, Object value)
                    throws WrongValueException {
                try {
                    model.validateTemplateName((String) value);

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        validateCriterionWithItsType(criterionSatisfactionDTO,comp);
        reload();
    }


    public Constraint validateStartDate(){
        return new Constraint() {
                        @Override
                        public void validate(Component comp, Object value)
                                throws WrongValueException {
                            validateStartDate(comp,value);
                        }

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                    _("Start date is not valid, the new start date must be previous the current start date"));
        }
    }


    public Constraint validateEndDate(){
        return new Constraint() {
                        @Override
                        public void validate(Component comp, Object value)
                                throws WrongValueException {
                           validateEndDate(comp,value);
                        }

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            });
        }
    }


    private Constraint checkConsecutiveDate(final Row row) {
        return new Constraint() {
            @Override
            public void validate(Component comp, Object value)
                    throws WrongValueException {


                final TaskQualityFormItem item = (TaskQualityFormItem) row

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        validateCriterionWithItsType(criterionSatisfactionDTO,comp);
        reload();
    }


    public Constraint validateEndDate(){
        return new Constraint() {
                        @Override
                        public void validate(Component comp, Object value)
                                throws WrongValueException {
                validateEndDate(comp, value);
                        }

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