java - JSpinner 时间约束

Question

我正在尝试创建一个有小时和分钟的微调器。分钟部分只需要增加 10 分钟，时间范围必须从当前时间到结束时间。我还需要最小值(以前的当前时间)更新到当前时间。

我试着玩弄它，但就是无法让它工作。

JSpinner spinner1 = new javax.swing.JSpinner();
    SpinnerDateModel spinnermodel = new SpinnerDateModel();
    spinnermodel.setCalendarField(Calendar.MINUTE);
    spinner1.setModel(spinnermodel);
    spinner1.setEditor(new JSpinner.DateEditor(spinner1, "hh:mm"));

SpinnerModel model = new SpinnerDateModel(currentDate, currentDate, latestDate, Calendar.MINUTE * 10 ?);

Answer 1

SpinnerDateModel 仅使用 1 来递增您要更改的字段。

我扩展了 SpinnerDateModel 以向模型添加附加属性来控制增量值而不是硬编码为 1:

import java.util.*;
import javax.swing.*;

public class MySpinnerDateModel extends SpinnerDateModel
{
    private int increment = 1;

    public MySpinnerDateModel(Date value, Comparable start, Comparable end, int calendarField)
    {
        super(value, start, end, calendarField);
    }

    public MySpinnerDateModel()
    {
        this(new Date(), null, null, Calendar.DAY_OF_MONTH);
    }

    public void setIncrement(int increment)
    {
        this.increment = increment;
    }

    public int getIncrement()
    {
        return increment;
    }

    @Override
    public Object getNextValue()
    {
        Calendar cal = Calendar.getInstance();
        Date value = (Date)getValue();
        cal.setTime(value);
        cal.add(getCalendarField(), increment);
        Date next = cal.getTime();
        Comparable end = getEnd();

        return ((end == null) || (end.compareTo(next) >= 0)) ? next : null;
    }

    @Override
    public Object getPreviousValue()
    {
        Calendar cal = Calendar.getInstance();
        Date value = (Date)getValue();
        cal.setTime(value);
        cal.add(getCalendarField(), -increment);
        Date prev = cal.getTime();
        Comparable start = getStart();

        return ((start == null) || (start.compareTo(prev) <= 0)) ? prev : null;
    }
}

您应该能够像以前一样使用该模型，但需要附加一条语句:

MySpinnerDateModel model = new MySpinnerDateModel(currentDate, currentDate, latestDate, Calendar.MINUTE); 
model.setIncrement( 10 );