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

    public UnitType getUnitType() {
        return unitTypeModel.getCurrentUnitType();
    }


    public Constraint uniqueMeasureName() {
        return new Constraint() {


            @Override
            public void validate(Component comp, Object value) {
                String strValue = (String) value;
                if (StringUtils.isBlank(strValue)) {

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            }
        };
    }


    public Constraint uniqueCode() {
        return new Constraint() {


            @Override
            public void validate(Component comp, Object value) {
                String strValue = (String) value;
                if (StringUtils.isBlank(strValue)) {

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     * Validates {@link Textbox} checking {@link Constraint}
     * @param comp
     */
    private void validate(Textbox comp) {
        if (comp != null && comp.getConstraint() != null && !comp.isDisabled()) {
            final Constraint constraint = comp.getConstraint();
            constraint.validate(comp, comp.getValue());
        }
    }

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        order.setInitDate(new Date());
        order.setCalendar(defaultCalendar);
    }


    public Constraint checkConstraintFinishDate() {
        return new Constraint() {
            @Override
            public void validate(Component comp, Object value)
                    throws WrongValueException {
                Date finishDate = (Date) value;
                if ((finishDate != null) && (initDate.getValue() != 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) && (deadline.getValue() != null)

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                public void onEvent(Event event) throws Exception {
                    reloadWorkWeeksList();
                }
            });


            datebox.setConstraint(new Constraint() {
                @Override
                public void validate(Component comp, Object value)
                        throws WrongValueException {
                    try {
                        baseCalendarModel.checkAndChangeStartDate(version,

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                public void onEvent(Event event) throws Exception {
                    reloadWorkWeeksList();
                }
            });


            datebox.setConstraint(new Constraint() {
                @Override
                public void validate(Component comp, Object value)
                        throws WrongValueException {
                    Date date = ((Date) value);
                    try {

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        ((Textbox)editWindow.getFellowIfAny("passwordConfirmation")).
            clearErrorMessage(true);
    }


    public Constraint validatePasswordConfirmation() {
        return new Constraint() {
            @Override
            public void validate(Component comp, Object value)
                    throws WrongValueException {
                ((Textbox)comp).setRawValue(value);
                if(!((String)value).equals(passwordBox.getValue())) {

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    /**
     * Operations to filter the tasks 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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