需要验证GXT DateFields dateTo必须早于date

Question

需要验证GXT DateFields dateTo必须早于dateFrom。当我正在考虑解决问题时，它应该是为此目的而创建的验证者日期。

任何想法，样品？

Answer 1

问题的解决方案在这里：

@UiHandler("dateFrom")
void dateFromChange(ValueChangeEvent<Date> event){
    dateFrom.addValidator(new MaxDateValidator(dateTo.getValue()));
}

Answer 2

这正是你需要的

Date selectedFromDate = fromDateField.getDatePicker().getValue();
    Date selectedToDate = toDateField.getDatePicker().getValue();

    long fromDate = selectedFromDate.getTime();
    long toDate = selectedToDate.getTime();

    long diffGap = toDate - fromDate;
    long diffDays = diffGap / (24 * 60 * 60 * 1000);

if (fromDate > toDate) {
        Window.alert("To Date must be greater than From Date");
        return false;
    }