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index.zulzul<zk>
<hlayout width="100%">
<div viewModel="@id('vm')@init('pkg$.ViewModel')" hflex="1">
<hlayout>
<intbox zclass="z-paging-input" cols="4" value="@bind(vm.pageSize)" id="pageSize" forward="onOK=onChange" />
<label value="Items" id="paginationResults" />
</hlayout>
<listbox checkmark="true" multiple="true" mold="paging"
model="@load(vm.listModel)" selectedItems="@bind(vm.selectedItems)">
<template name="model">
<apply template="listitem1" />
</template>
</listbox>
</div>
</hlayout>
<template name="listitem1">
<listitem focus="@load(self.selected)" draggable="true" droppable="@load(self.draggable)" onDrop="@command('drop')">
<apply template="listcell11" />
<apply template="listcell12" />
</listitem>
</template>
<template name="listcell11">
<listcell label="@load(each.prop1)"/>
</template>
<template name="listcell12">
<listcell label="@load(each.prop3)"/>
</template>
</zk>ViewModel.javajavaimport org.zkoss.bind.annotation.Command;
import org.zkoss.bind.annotation.GlobalCommand;
import org.zkoss.bind.BindUtils;
import org.zkoss.bind.annotation.Init;
import org.zkoss.zk.ui.util.*;
import java.util.*;
public class ViewModel {
private LiveListModel listModel;
private Set<MyBean> selectedItems = new HashSet<>();
@Init
public void init() {
listModel = new LiveListModel();
listModel.setMultiple(true);
}
public LiveListModel getListModel() {
return listModel;
}
public Set<MyBean> getSelectedItems() {
return selectedItems;
}
public void setSelectedItems(Set<MyBean> set) {
selectedItems = set;
Clients.log(set.toString());
}
public boolean isItemSelected(MyBean bean) {
return getSelectedItems().contains(bean);
}
public int getPageSize() {
return listModel.getPageSize();
}
public void setPageSize(int value) {
listModel.setPageSize(value);
}
}
MyBean.javajavapublic class MyBean {
private String prop1;
private int prop3;
public MyBean(String prop1, int index) {
super();
this.prop1 = prop1;
this.prop3 = index;
}
public String getProp1() {
return prop1;
}
public void setProp1(String prop1) {
this.prop1 = prop1;
}
public int getProp3() {
return prop3;
}
public void setProp3(int prop3) {
this.prop3 = prop3;
}
public String toString () {
return getProp1() + "_" + hashCode();
}
public boolean equals(Object other) {
if (this == other)
return true;
if (other == null || getClass() != other.getClass())
return false;
return prop3 == ((MyBean) other).getProp3();
}
@Override
public int hashCode() {
return java.util.Objects.hash(getProp1(), getProp3());
}
}
LiveListModel.javajavaimport org.zkoss.zk.ui.*;
import org.zkoss.zk.ui.event.*;
import org.zkoss.zk.ui.util.*;
import org.zkoss.zk.ui.ext.*;
import org.zkoss.zk.au.*;
import org.zkoss.zk.au.out.*;
import org.zkoss.zul.*;
import java.util.HashMap;
import java.util.Map;
import org.zkoss.zk.ui.Execution;
import org.zkoss.zk.ui.Executions;
import org.zkoss.zul.AbstractListModel;
public class LiveListModel extends AbstractListModel<MyBean> {
private final static String CACHE_KEY= LiveListModel.class + "_cache";
private int pageSize = 20;
@Override
public MyBean getElementAt(final int index) {
Map<Integer, MyBean> cache = getCache();
MyBean target = cache.get(index);
if (target == null) {
//if cache doesn't contain target object, query a page size of data starting from the index
int indexKey = index;
for (int i=index; i < index+getPageSize() ; i++) {
target = new MyBean("left-item-" + i, i);
cache.put(indexKey, target);
indexKey++;
}
}
return target;
}
private Map<Integer, MyBean> getCache() {
Execution execution = Executions.getCurrent();
//we only reuse this cache in one execution to avoid accessing detached objects.
//our filter opens a session during a HTTP request
Map<Integer, MyBean> cache = (Map) execution.getAttribute(CACHE_KEY);
if (cache == null) {
cache = new HashMap<>();
execution.setAttribute(CACHE_KEY, cache);
}
return cache;
}
@Override
public int getPageSize() {
return pageSize;
}
public void setPageSize(int pageSize) {
super.setPageSize(this.pageSize=pageSize);
}
@Override
public int getSize() {
return 400000;
}
// rest of the class body
}