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index.zulzul<zk>
<window title="Search Storage Item" border="normal" width="600px"
apply="org.zkoss.bind.BindComposer"
viewModel="@id('vm') @init('pkg$.TestVM')">
<!-- Script xử lý scroll vô hạn -->
<script>
zk.afterMount(function () {
var cb = zk.Widget.$('$cb_test');
if (!cb) return;
// Bắt sự kiện scroll trong popup dropdown của combobox
cb.listen({onOpen: function (evt) {
if (evt.open) {
var popup = cb.$n('pp');
if (!popup._scrollBound) {
popup._scrollBound = true;
popup.addEventListener('scroll', function () {
if (popup.scrollTop + popup.clientHeight >= popup.scrollHeight - 5) {
// Gọi command trong ViewModel khi scroll chạm đáy
zAu.send(new zk.Event(cb, 'onReachBottom', null, {toServer: true}));
}
});
}
}
}});
});
</script>
<custom-attributes org.zkoss.zul.combobox.rod="true" />
<custom-attributes org.zkoss.zul.combobox.initRodSize="10" />
<custom-attributes org.zkoss.zul.combobox.preloadSize="10" />
<vlayout spacing="10px">
<label value="Combobox infinite scroll demo" />
<combobox id="cb_test" width="100%" model="@load(vm.items)">
<template name="model" var="item">
<comboitem label="@load(item.x)" value="@load(item.y)" />
</template>
<!-- Bắt sự kiện do script gửi về -->
<attribute name="onReachBottom">
<![CDATA[
vm.loadMore();
]]>
</attribute>
</combobox>
</vlayout>
</window>
</zk>
TestVM.javajavaimport java.util.*;
import org.zkoss.bind.annotation.*;
import org.zkoss.zul.SimpleListModel;
public class TestVM {
private List<Map<String, String>> allData = new ArrayList<>();
private List<Map<String, String>> current = new ArrayList<>();
private SimpleListModel<Map<String, String>> items;
private int loadedCount = 0;
private static final int PAGE_SIZE = 10;
@Init
public void init() {
// Giả lập dữ liệu tổng (500 dòng)
for (int i = 0; i < 500; i++) {
Map<String, String> row = new HashMap<>();
row.put("x", "Label " + i);
row.put("y", "Value " + i);
allData.add(row);
}
// Load ban đầu
loadNextPage();
}
private void loadNextPage() {
int nextEnd = Math.min(loadedCount + PAGE_SIZE, allData.size());
if (loadedCount < nextEnd) {
current.addAll(allData.subList(loadedCount, nextEnd));
loadedCount = nextEnd;
items = new SimpleListModel<>(current);
}
}
@Command
@NotifyChange("items")
public void loadMore() {
System.out.println("Loading more data...");
loadNextPage();
}
public SimpleListModel<Map<String, String>> getItems() {
return items;
}
}