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index.zulzul<zk>
<hlayout width="100%">
<div viewModel="@id('vm')@init('pkg$.FocusViewModel')" hflex="1">
<button label="add row" onClick="@command('addRow')"/>
<listbox checkmark="true" model="@load(vm.listModel)" selectedItems="@bind(vm.selectedItems)" height="200px">
<template name="model">
<listitem focus="@load(vm.isItemSelected(each))">
<listcell label="@load(each.prop1)"/>
<listcell label="@load(vm.isItemSelected(each))"/>
</listitem>
</template>
</listbox>
<listbox >
</listbox>
</div>
<space width="20px" />
<div viewModel="@id('vm')@init('pkg$.FocusViewModel2')" hflex="1">
<button disabled="true" label="@load(empty vm.selectedItem ? 'empty selection' : 'selected: ' .concat(vm.selectedItem.prop1))" />
<listbox checkmark="true" model="@load(vm.listModel)" selectedItem="@bind(vm.selectedItem)" height="200px" >
<template name="model">
<listitem focus="@load(vm.isItemSelected(each))">
<listcell label="@load(each.prop1)"/>
</listitem>
</template>
</listbox>
<listbox >
</listbox>
</div>
</hlayout>
</zk>FocusViewModel.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.zul.ListModelList;
import java.util.*;
public class FocusViewModel {
private ListModelList<MyBean> listModel;
private Set<MyBean> selectedItems = new HashSet<>();
@Init
public void init() {
listModel = new ListModelList<MyBean>();
listModel.setMultiple(true);
for (int i=1; i < 40 ; i++) {
listModel.add(new MyBean("left-item-" + i, i));
}
selectedItems.clear();
}
@GlobalCommand
public void refreshModel() {
org.zkoss.zul.Messagebox.show("refreshing left model");
Set<MyBean> cache = new HashSet<>(selectedItems);
init(); // similuate re-load from db
selectedItems = cache; // set previous selection
BindUtils.postNotifyChange(null, null, this, "selectedItems");
BindUtils.postNotifyChange(null, null, this, "listModel");
}
@Command
public void addRow() {
int index = listModel.size() + 1;
MyBean bean = new MyBean("new-left-item-" + index, index);
listModel.add(bean);
getSelectedItems().clear();
getSelectedItems().add(bean);
BindUtils.postGlobalCommand(null, null, "refreshModel2", Collections.emptyMap());
}
public ListModelList<MyBean> getListModel() {
return listModel;
}
public Set<MyBean> getSelectedItems() {
return selectedItems;
}
public void setSelectedItems(Set<MyBean> set) {
selectedItems = set;
}
public boolean isItemSelected(MyBean bean) {
return getSelectedItems().contains(bean);
}
}
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 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());
}
}
FocusViewModel2.javajavaimport org.zkoss.bind.annotation.Command;
import org.zkoss.bind.annotation.GlobalCommand;
import org.zkoss.bind.annotation.Init;
import org.zkoss.bind.BindUtils;
import org.zkoss.zul.ListModelList;
import java.util.*;
public class FocusViewModel2 {
private ListModelList<MyBean> listModel;
private MyBean selectedItem = null;
@Init
public void focusVMInit() {
init();
selectedItem = listModel.get(13);
}
public void init() {
listModel = new ListModelList<MyBean>();
listModel.setMultiple(false);
for (int i=1; i < 40 ; i++) {
listModel.add(new MyBean("right-item-" + i, i));
}
}
@GlobalCommand
public void refreshModel2() {
//org.zkoss.zul.Messagebox.show("refreshing right model");
MyBean cache = selectedItem;
init(); // similuate re-load from db
//org.zkoss.zul.Messagebox.show("right model refreshed");
BindUtils.postNotifyChange(null, null, this, "listModel");
//org.zkoss.zul.Messagebox.show("listModel notfied");
setSelectedItem(cache); // set previous selection
BindUtils.postNotifyChange(null, null, this, "selectedItem");
org.zkoss.zul.Messagebox.show("right model refreshed. listModel notfied. selectedItem notfied. selected " + (getSelectedItem() != null ? getSelectedItem().getProp1() : " nothing"));
}
public ListModelList<MyBean> getListModel() {
return listModel;
}
public MyBean getSelectedItem() {
return selectedItem;
}
public void setSelectedItem(MyBean bean) {
selectedItem = bean;
}
public boolean isItemSelected(MyBean bean) {
return bean.equals(getSelectedItem());
}
}