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index.zulzul<zk>
<window border="normal" title="hello" apply="org.zkoss.bind.BindComposer" viewModel="@id('vm') @init('pkg$.VisiteClasseVM')">
<div>
<vlayout form="@id('fx') @load(vm.selected) @save(vm.selected, before={'saveAndAdd1', 'saveAndAdd2'})">
<hlayout>
<label value="Some text of data"/>
<textbox value="@bind(fx.text)"/>
</hlayout>
<hlayout>
<label value="List of elements of data"/>
<listbox model="@bind(fx.elements)"
multiple="true"
selectedItems="@bind(vm.selectedElements) @converter(vm.formConverter)">
<template name="model" var="item">
<listitem>
<listcell label="@load(item.elem)"/>
</listitem>
</template>
</listbox>
</hlayout>
<hlayout>
<label value="size of selection"/>
<label value="@load(vm.selectedElements.size())"/>
</hlayout>
<hlayout>
<label value="current selection"/>
<label value="@load(vm.currentSelection)"/>
</hlayout>
<button label="remove" onClick="@command('removeSelected', fx=fx)"/>
<button label="saveAndAdd1" onClick="@command('saveAndAdd1')"/>
<button label="saveAndAdd2" onClick="@command('saveAndAdd2')"/>
</vlayout>
</div>
</window>
</zk>
VisiteClasseVM.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 org.zkoss.bind.annotation.*;
import org.zkoss.bind.*;
import java.util.*;
import java.util.stream.*;
import org.zkoss.bind.Converter;
public class VisiteClasseVM{
private Converter formConverter = new ProxiedListitemsConverter();
private Data selected = null;
public Data getSelected() {
return selected;
}
public void setSelected(Data data) {
this.selected = data;
}
private Set<Elem> selectedElements = new HashSet<>();
public Set<Elem> getSelectedElements() {
return selectedElements;
}
public void setSelectedElements(Set<Elem> selectedElementsSet) {
this.selectedElements = selectedElementsSet;
}
@DependsOn({"selectedElements"})
public String getCurrentSelection() {
return selectedElements.stream().map(e -> e.getElem()).collect(Collectors.joining(","));
}
@Init
public void init() {
selected = new Data();
selected.addElement(new Elem("1"));
selected.addElement(new Elem("2"));
selected.addElement(new Elem("3"));
selected.addElement(new Elem("4"));
}
@Command
@NotifyChange({"selectedElements"})
public void removeSelected(@BindingParam("fx") Data form) {
form.getElements().removeAll(selectedElements);
BindUtils.postNotifyChange(null, null, form, "elements");
selectedElements.clear();
}
@Command
@NotifyChange({"selected", "selectedElements"})
public void saveAndAdd1() {
selected.setText("saved1");
Elem newElem = new Elem("new");
selected.addElement(newElem);
selectedElements.add(newElem);
}
@Command
@NotifyChange({"selected", "selectedElements"})
public void saveAndAdd2() {
selected.setText("saved2");
Elem newElem1 = new Elem("new1");
Elem newElem2 = new Elem("new2");
selected.addElement(newElem1);
selected.addElement(newElem2);
selectedElements.add(newElem1);
selectedElements.add(newElem2);
}
public Converter getFormConverter() {
return formConverter;
}
}
Data.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.*;
public class Data {
public Data() {
this.text = "new";
}
private List<Elem> elements = new LinkedList<>();
public void addElement(Elem elem) {
this.elements.add(elem);
}
public List<Elem> getElements() {
return this.elements;
}
private String text;
public String getText() {
return text;
}
public void setText(String aText) {
this.text=aText;
}
}
Elem.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.*;
public class Elem {
public Elem() {
this.elem="";
}
public Elem(String txt) {
this.elem=txt;
}
private String elem;
public String getElem() {
return elem;
}
public void setElem(String anElem) {
this.elem=anElem;
}
public boolean equals(Object obj) {
if (obj instanceof Elem) {
Elem o = (Elem) obj;
return Objects.equals(o.getElem(), getElem());
} else return false;
}
public int hashCode() {
if (getElem() != null) return getElem().hashCode();
else return 0;
}
}
ProxiedListitemsConverter.javajavaimport java.util.HashSet;
import java.util.Iterator;
import java.util.LinkedHashSet;
import java.util.Set;
import org.zkoss.bind.BindContext;
import org.zkoss.bind.Converter;
import org.zkoss.bind.proxy.FormProxyObject;
import org.zkoss.lang.Classes;
import org.zkoss.zk.ui.Component;
import org.zkoss.zk.ui.UiException;
import org.zkoss.zul.ListModel;
import org.zkoss.zul.Listbox;
import org.zkoss.zul.Listitem;
import org.zkoss.zul.ext.Selectable;
public class ProxiedListitemsConverter implements Converter, java.io.Serializable {
private static final long serialVersionUID = 201108171811L;
@SuppressWarnings("unchecked")
public Object coerceToUi(Object val, Component comp, BindContext ctx) {
Listbox lbx = (Listbox) comp;
final ListModel<?> model = lbx.getModel();
if (model != null && !(model instanceof Selectable)) {
//model has to implement Selectable if binding to selectedItems
throw new UiException("model doesn't implement Selectable");
}
final Set<Listitem> items = new LinkedHashSet<Listitem>();
Set<Object> vals = val == null ? null : (Set<Object>) Classes.coerce(LinkedHashSet.class, val);
if (vals != null && vals.size() > 0) {
if (model != null) {
((Selectable<Object>) model).setSelection(vals);
for(int i = 0; i < model.getSize(); i++) {
Object modelEntry = model.getElementAt(i);
if(modelEntry instanceof FormProxyObject && vals.contains(((FormProxyObject)modelEntry).getOriginObject()))
((Selectable<Object>) model).addToSelection(modelEntry);
}
} else {
//no model case
for (final Iterator<?> it = lbx.getItems().iterator(); it.hasNext();) {
final Listitem li = (Listitem) it.next();
Object bean = li.getValue();
if(bean instanceof FormProxyObject) {
bean = ((FormProxyObject)bean).getOriginObject();
}
if (vals.contains(bean)) {
items.add(li);
}else {
for (Object object : vals) {
if(object instanceof FormProxyObject && ((FormProxyObject)object).getOriginObject().equals(bean)) {
items.add(li);
}
}
}
}
}
} else if (model != null && !((Selectable<Object>) model).isSelectionEmpty()) { //model !=null and no selection
((Selectable<Object>) model).clearSelection();
}
return model == null ? items : IGNORED_VALUE;
}
@SuppressWarnings("unchecked")
public Object coerceToBean(Object val, Component comp, BindContext ctx) {
Set<Object> vals = new LinkedHashSet<Object>();
if (val != null) {
final Listbox lbx = (Listbox) comp;
final ListModel<?> model = lbx.getModel();
if (model != null && !(model instanceof Selectable)) {
throw new UiException("model doesn't implement Selectable");
}
if (model != null) {
Set<?> selection = ((Selectable<?>) model).getSelection();
if (selection != null && selection.size() > 0) {
for (Object o : selection) {
vals.add(o);
}
}
} else { //no model
final Set<Listitem> items = (Set<Listitem>) Classes.coerce(HashSet.class, val);
for (Listitem item : items) {
vals.add(item.getValue());
}
}
}
return vals;
}
}