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index.zulzul<zk xmlns="http://www.zkoss.org/2005/zul" xmlns:h="http://www.w3.org/1999/xhtml">
<window id="mainPanel" apply="org.zkoss.bind.BindComposer" title="Test" viewModel="@id('vm') @init('pkg$.TestVM')" border="rounded" validationMessages="@id('vmsgs')">
<style>
.z-combobox[invalid="true"] input.z-combobox-input {background: #FBCC42 none;
border: 1px #CCCCCC solid !important;
border-right: none !important;
}
</style>
<grid style="background-color: sand" visible="@bind(not empty vmsgs.texts)" model="@bind(vmsgs.texts) @template('errorPanelModel')">
<rows>
<template name="errorPanelModel" var="error">
<row>
<label value="@load(error)" multiline="true"/>
</row>
</template>
</rows>
</grid>
<label value="Select category 'Category 2' and sub-category 'SubCategory 4', then select 'Category 1'. Note that the second combobox selected
item is not part of its model." multiline="true" style="color: blue"/>
<h:table>
<h:tr>
<h:td>
<label value="Category"/>
</h:td>
<h:td>
<combobox model="@load(vm.categories) @template('catModel')"
selectedItem="@load(vm.selectedCategory) @save(vm.selectedCategory, before='save') @validator(vm.validators.category)"
onOK="@command('save')" onSelect="@command('changeSubCatModel')">
<template name="catModel" var="cat">
<comboitem label="@load(cat.name)"/>
</template>
</combobox>
</h:td>
</h:tr>
<h:tr>
<h:td>
<label value="Subcategory"/>
</h:td>
<h:td>
<combobox model="@load(vm.subCategories) @template('scatModel')"
selectedItem="@load(vm.selectedSubCategory) @save(bm.selectedSubCategory, before='save') @validator(vm.validators.subCategory)"
onOK="@command('save')">
<template name="scatModel" var="scat">
<comboitem label="@load(scat.name)"/>
</template>
</combobox>
</h:td>
</h:tr>
<h:tr>
<h:td>
<label value="Some other field"/>
</h:td>
<h:td>
<textbox value="@load(vm.field) @save(vm.field, before='save') @validator(vm.validators.field)"/>
</h:td>
</h:tr>
</h:table>
<space sclass="space5"/>
<hbox>
<button onClick="@command('save')" id="saveButton" label="Save" autodisable="saveButton" disabled="@load(not empty vmsgs.error)"/>
</hbox>
</window>
</zk>
TestVM.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 org.zkoss.zk.ui.select.Selectors;
import java.util.*;
import org.zkoss.bind.validator.*;
import org.zkoss.bind.sys.ValidationMessages;
public class TestVM {
private final Map<Category, List<SubCategory>> data;
private final Map<String, AbstractValidator> validators;
private String field;
private Category selectedCategory;
private SubCategory selectedSubCategory;
private ListModelList<Category> catModel = new ListModelList<Category>();
private ListModelList<SubCategory> subCatModel = new ListModelList<SubCategory>();
private ValidationMessages validationMessages;
public TestVM() {
// setup data
data = new HashMap<Category, List<SubCategory>>();
List<SubCategory> subCategories = new ArrayList<SubCategory>();
subCategories.add(new SubCategory(1));
subCategories.add(new SubCategory(2));
subCategories.add(new SubCategory(3));
data.put(new Category(1), subCategories);
subCategories = new ArrayList<SubCategory>();
subCategories.add(new SubCategory(4));
data.put(new Category(2), subCategories);
catModel.addAll(data.keySet());
// setup validators
validators = new HashMap<String, AbstractValidator>();
validators.put("category", new MandatoryFieldValidator("category"));
validators.put("subCategory", new MandatoryFieldValidator("subCategory"));
validators.put("field", new MandatoryFieldValidator("field"));
}
@Command
public void blur() {
changeSubCatModel();
}
@Command
@NotifyChange("subCategories")
public void save() {
if (selectedCategory == null || selectedSubCategory == null) {
throw new IllegalArgumentException("invalid data");
}
}
@Command
@NotifyChange("subCategories")
public void changeSubCatModel() {
List<SubCategory> scatList = data.get(selectedCategory);
if (scatList != null) {
subCatModel.clear();
subCatModel.addAll(data.get(selectedCategory));
}
}
public Map<String, AbstractValidator> getValidators() {
return this.validators;
}
public String getField() {
return this.field;
}
public void setField(final String field) {
this.field = field;
}
public Category getSelectedCategory() {
return this.selectedCategory;
}
public void setSelectedCategory(final Category category) {
this.selectedCategory = category;
}
public ListModelList<Category> getCategories() {
return catModel;
}
public SubCategory getSelectedSubCategory() {
return this.selectedSubCategory;
}
public void setSelectedSubCategory(final SubCategory subCategory) {
this.selectedSubCategory = subCategory;
}
public ListModelList<SubCategory> getSubCategories() {
return subCatModel;
}
public static class MandatoryFieldValidator extends AbstractValidator {
private final String fieldLabel;
public MandatoryFieldValidator(final String fieldLabel) {
this.fieldLabel = fieldLabel;
}
@Override
public void validate(final ValidationContext validationContext) {
final Object value = validationContext.getProperty().getValue();
final Component component = validationContext.getBindContext().getComponent();
component.setWidgetAttribute("invalid", "false");
// field is mandatory
if (value == null) {
component.setWidgetAttribute("invalid", "true");
addInvalidMessage(validationContext, "error", String.format("%s: missing value", this.fieldLabel));
validationContext.setInvalid();
}
component.invalidate();
}
}
}
Category.javajavapublic class Category {
private final String name;
public Category(final int id) {
this.name = "Category " + id;
}
public String getName() {
return this.name;
}
}
SubCategory.javajavapublic class SubCategory {
private final String name;
public SubCategory(final int id) {
this.name = "SubCategory " + id;
}
public String getName() {
return this.name;
}
}