display list items vertically in multiple columns

asked 2017-09-27 12:47:59 +0800

mpatt gravatar image mpatt
3 2

updated 2017-09-27 14:23:17 +0800

cor3000 gravatar image cor3000
6280 2 7

current code sample

<center border="none">
          <div visible="@load(not empty vm.otherObjects)" height="300px" >
            <radiogroup id="otherObjRadioGroup" />
            <portallayout id="otherObjectsPortal" children="@load(vm.otherObjects)">
                    <template name="children">
                          <portalchildren width="25%" style="padding:3px;">
                                <vbox align="left" width="100%" height="25px" style="padding:2px;">
                                <radio id="${each}" label="@load(each)" radiogroup="otherObjRadioGroup" style="padding:3px;font-size:15px"/>


=============================== This is displayed horizontally now as below - 1.Airplane 2.Apple 3.Banana 4.Baseball_glove
<line break=""> 5.Bear 6.Car 7.cow 8.Dog

But i want them like following - 1.Airplane 3.Banana 5.Bear 7.cow <line break=""> 2.Apple 4.Baseball_glove 6.Car 8.Dog

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Thats right. I have more items and count is dynamic. That's why i wanted to avoid this index%2 and processing part. But anyway I will give it a check. Thank you!

mpatt ( 2017-09-27 16:01:19 +0800 )edit

Exactly what I mean... so you just need to decide on a display order and the component will follow. Unfortunately that's a decision only your code can make. Whether it's adding a new column for item 9,10 or a new row - it's up to you.

cor3000 ( 2017-09-27 16:40:28 +0800 )edit

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answered 2017-09-27 14:57:56 +0800

cor3000 gravatar image cor3000
6280 2 7

updated 2017-09-27 15:07:38 +0800

All you need to do is change the order in your collection "otherObjects" and the rendering will reflect that order.

This doesn't require any feature in ZK and can be done with plain java.

public void reorder(List<String> list) {
    List<String> toAppend = new ArrayList<>(list.size() / 2);
    Iterator<String> it = list.iterator();
    int index = 0;
    while(it.hasNext()) {
        String item = it.next();
        if(index % 2 == 1) {

init() {
    // ... load the objects somehow

Here a runnable version on ZK-Fiddle using the same reorder method: http://zkfiddle.org/sample/2322jsj/1-reorder-items-in-list

Since your question wasn't more specific this is just a simple solution for 8 items. It might be more interesting for you to decide what to do if there are more or less than 8 items in your list.

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Asked: 2017-09-27 12:47:59 +0800

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Last updated: Sep 27 '17

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