ZK在列表框中重新排序 [英] ZK Reordering in Listbox

问题描述

我想在zk中使用 listitem 的重新排序当我们在 zul 文件中定义标签（listitem，listcell）时，我们怎么做呢。我不这样做想要使用 ListitemRenderer 。这里我找到了一些东西，但可能是他们没有更新事情

I will want to use reordering of listitem in zk How can we do it when we have define tags(listitem,listcell) inside the zul file .I do Not want to use ListitemRenderer.Here i found something but may be they are not updating things

推荐答案

列表框重新排序列

可以找到以下示例在 zk小提琴上。

这是我们稍后扩展到弹出窗口的第一个例子。

简单的观点：

First a dnd example that we extend to the popup way later.
The simple view:

<window apply="test.LboxViewCtrl">
        <listbox id="lbox">
            <listhead id="lHead">
                <listheader draggable="head" droppable="head" label="Col A" />
                <listheader draggable="head" droppable="head" label="Col B" />
                <listheader draggable="head" droppable="head" label="Col C" />
            </listhead>
            <auxhead>
                <auxheader colspan="3">
                    <button id="reorderBtn" label="Reorder" />
                </auxheader>
            </auxhead>
            <listitem>
                <listcell label="A1" />
                <listcell label="B1" />
                <listcell label="C1" />
            </listitem>
            <listitem>
                <listcell label="A2" />
                <listcell label="B2" />
                <listcell label="C2" />
            </listitem>
        </listbox>  
    </window>

评论员解释说：

public class LboxViewCtrl extends SelectorComposer<Component> {

    @Wire
    private Listbox lbox;
    @Wire
    private Listhead lHead;
    @Wire
    private Panel menu;
    @Wire
    private Listbox box;

    @Listen("onDrop = #lbox > #lHead > listheader")
    public void onDroplHead(DropEvent ev) {
        // get the dragged Listheader and the one it is dropped on.
        Listheader dragged = (Listheader) ev.getDragged();
        Listheader droppedOn = (Listheader) ev.getTarget();
        // then get their indexes.
        int from = lHead.getChildren().indexOf(dragged);
        int to = lHead.getChildren().indexOf(droppedOn);

        // swap the positions
        lHead.insertBefore(dragged, droppedOn);

        // swap related Listcell in all Listitem instances
        for (Listitem item : lbox.getItems()) {
            item.insertBefore(item.getChildren().get(from), item.getChildren().get(to));
        }

    }

}

现在我们可以列出这些列。

Now we can dnd the columns.

首先我们添加一个打开的方法我们的菜单，如果我们点击列表框中的按钮。

First we add a method that open up our menu if we click the button in Listbox.

@Listen("onClick = #reorderBtn")
public void onEditorOpen(Event e) {
    Window win = (Window) Executions.createComponents("/lbMenu.zul", this.getSelf(), null);
    win.doModal();
}

当然我们需要弹出视图：

Of course we need a view for the pop up:

<window id="menu" visible="false" closable="true" position="center" width="400px" height="150px" border="normal" title="Reorder" apply="test.MenuViewCtrl">
    <listbox id="box">
        <template name="model">
            <listitem label="${each.label}" draggable="move" droppable="move" />
        </template>
    </listbox>
</window>

以及控制器：

    @Wire
    private Window menu;
    @Wire
    private Listbox box;

    private Listhead lHead;

    @Override
    public void doAfterCompose(Component comp) throws Exception {
        super.doAfterCompose(comp);
        // get the Listboxhead in which we like to change the the col order
        lHead = (Listhead) menu.getParent().query("#lbox > #lHead");
        // set the model for Listbox box in the pop up
        box.setModel(new ListModelList<>(lHead.getChildren()));
    }

    @Listen("onDrop = listitem")
    public void onDropInMenu(DropEvent ev) {
        // get the draged and dropped again
        Listitem dragged = (Listitem) ev.getDragged();
        Listitem droppedOn = (Listitem) ev.getTarget();

        // then get their indexes.
        int from = box.getItems().indexOf(dragged);
        int to = box.getItems().indexOf(droppedOn);

        // swap the positions
        lHead.insertBefore(lHead.getChildren().get(from), lHead.getChildren().get(to));

        // swap related Listcell in all Listitem instances
        for (Listitem item : lHead.getListbox().getItems()) {
            item.insertBefore(item.getChildren().get(from), item.getChildren().get(to));
        }

        // swap the items in pop up Lisbox as well
        box.insertBefore(dragged, droppedOn);
    }

如果您想要上/下按钮而不是dnd，只需要一个看看这个 zk demo。

If you want to have up/down buttons instead of dnd, just take a look at this zk demo.

这很容易，可以在 ZK-Documentation 和 ZK Demosite 。

只需添加

It is very easy and can be found quickly in ZK-Documentation and on ZK Demosite.
Just add

sortAscending="XXX" sortDescending="XXX"

到.zul中的zks Listhead 组件，其中 XXX 通过 java.lang.Comparator .org / wiki / ZK％20Developer％27s％20Reference / MVVM / Data％20绑定rel =nofollow>数据绑定， el表达或设置在作曲家。

to zks Listhead component in your .zul, where XXX is evaluated to
java.lang.Comparator by data binding, el expression or set inside your composer.

这篇关于ZK在列表框中重新排序的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！