如何使用Wicket中的模型?

我尝试创建以下结构的页面:

MainPage {
    DateSelector {}
    TabGroup {
        Tab0 {...}
        Tab1 {...}
        Tab2 {...}
    }
}

DateSelector是一个组件(扩展面板),使用户可以选择时间范围(startDate、endDate)。扩展“ajaxtabbedpanel”的选项卡组。选项卡组中显示的选项卡应使用选定的时间跨度来显示内容。

因此,如果用户在选择器中选择时间跨度,则所选选项卡中的内容应更新。

为此,我实现了一个DateSelector的用户可以重写以更新其内容的方法。

我觉得我的方法违背了框架。我可以用某种方式利用一个模型来加强实施吗?这是怎么回事?这些选项卡是否可以与日期选择器共享时间跨度,以便在时间跨度发生更改时进行更新?没有回电话?

DateSelector的实现方式如下:

abstract public class TimespanSelectionPanel extends Panel {

    public TimespanSelectionPanel(String id, Timespan timespan) {
        super(id, new CompoundPropertyModel<Timespan>(timespan));

        final DateTextField fromTextField = DateTextField.forDatePattern("from", "dd.MM.yyyy");
        fromTextField.setOutputMarkupId(true);
        fromTextField.add(new DatePicker());
        final DateTextField toTextField = DateTextField.forDatePattern("to", "dd.MM.yyyy");
        toTextField.setOutputMarkupId(true);
        toTextField.add(new DatePicker());

        fromTextField.add(new AjaxFormComponentUpdatingBehavior("onchange") {
            @Override
            protected void onUpdate(AjaxRequestTarget target) {
            }
        });
        toTextField.add(new AjaxFormComponentUpdatingBehavior("onchange") {
            @Override
            protected void onUpdate(AjaxRequestTarget target) {
            }
        });

        add(new AjaxLink<String>("today") {
            @Override
            public void onClick(AjaxRequestTarget target) {
                updateComponent(fromTextField, toTextField, target, Timespan.today());
            }
        });
        add(new AjaxLink<String>("yesterday") {
            @Override
            public void onClick(AjaxRequestTarget target) {
                updateComponent(fromTextField, toTextField, target, Timespan.yesterday());
            }
        });
        add(new AjaxLink<String>("lastMonth") {
            @Override
            public void onClick(AjaxRequestTarget target) {
                updateComponent(fromTextField, toTextField, target, Timespan.lastMonth());
            }
        });
        add(new AjaxLink<String>("actualMonth") {
            @Override
            public void onClick(AjaxRequestTarget target) {
                Timespan timespan = adjustToTextField(fromTextField, toTextField, target, Timespan.actualMonth());
                updateComponent(fromTextField, toTextField, target, timespan);
            }
        });
        add(new AjaxLink<String>("fromTo") {
            @Override
            public void onClick(AjaxRequestTarget target) {
                Timespan newTimespan = adjustToTextField(fromTextField, toTextField, target, fromTextField
                        .getModelObject(), toTextField.getModelObject());
                update(target, newTimespan);
            }
        });
        add(fromTextField);
        add(toTextField);
    }

    private Timespan adjustToTextField(DateTextField fromTextField, DateTextField toTextField,
            AjaxRequestTarget target, Timespan timespan) {
        return adjustToTextField(fromTextField, toTextField, target, timespan.getFrom(), timespan.getTo());
    }

    private Timespan adjustToTextField(final DateTextField fromTextField, final DateTextField toTextField,
            AjaxRequestTarget target, Date from, Date to) {
        Date today = DateUtil.today();
        if (to.after(today)) {
            to = today;
            toTextField.setModelObject(today);
            target.addComponent(toTextField);
        }
        if (from.after(to)) {
            from = to;
            fromTextField.setModelObject(from);
            target.addComponent(fromTextField);
        }
        return Timespan.fromTo(from, to);
    }

    private void updateComponent(final DateTextField fromTextField, final DateTextField toTextField,
            AjaxRequestTarget target, Timespan newTimespan) {
        fromTextField.setModelObject(newTimespan.getFrom());
        toTextField.setModelObject(newTimespan.getTo());
        target.addComponent(fromTextField);
        target.addComponent(toTextField);
        update(target, newTimespan);
    }

    abstract protected void update(AjaxRequestTarget target, Timespan timespan);

}