如何使用com.google.gwt.user.datepicker.client.DateBox限制可用的日期范围

Question

我需要限制Dates用户可以从中选择的内容com.google.gwt.user.datepicker.client.DateBox.

我似乎无法弄清楚如何限制分钟,Date所以他们不能选择过去的日期.

如果我不能这样做com.google.gwt.user.datepicker.client.DateBox是否有一个替代DateBox小部件,将允许我这种灵活性？

Answer 1

根据我收到的建议,我想出的是将可选日期限制在当天和之后.这适用于GWT 2.1.1

final DateBox dateBox = new DateBox();
dateBox.addValueChangeHandler(new ValueChangeHandler<Date>()
{
    @Override
    public void onValueChange(final ValueChangeEvent<Date> dateValueChangeEvent)
    {
        if (dateValueChangeEvent.getValue().before(today()))
        {
            dateBox.setValue(today(), false);
        }
    }
});
dateBox.getDatePicker().addShowRangeHandler(new ShowRangeHandler<Date>()
{
    @Override
    public void onShowRange(final ShowRangeEvent<Date> dateShowRangeEvent)
    {
        final Date today = today();
        Date d = zeroTime(dateShowRangeEvent.getStart());
        while (d.before(today))
        {
            dateBox.getDatePicker().setTransientEnabledOnDates(false, d);
            d = nextDay(d);
        }
    }
});

为了完整起见,这里是static操作日期的辅助方法:

private static Date today()
{
    return zeroTime(new Date());
}

/** this is important to get rid of the time portion, including ms */
private static Date zeroTime(final Date date)
{
    return DateTimeFormat.getFormat("yyyyMMdd").parse(DateTimeFormat.getFormat("yyyyMMdd").format(date));
}

private static Date nextDay(final Date date)
{
    return zeroTime(new Date(date.getTime() + 24 * 60 * 60 * 1000));
}