package org.apache.wicket.examples.compref;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import java.util.Objects;
import org.apache.wicket.examples.WicketExamplePage;
import org.apache.wicket.markup.html.form.DropDownChoice;
import org.apache.wicket.markup.html.form.Form;
import org.apache.wicket.markup.html.form.GroupedDropDownChoice;
import org.apache.wicket.markup.html.form.IChoiceRenderer;
import org.apache.wicket.markup.html.panel.FeedbackPanel;
import org.apache.wicket.model.CompoundPropertyModel;
import org.apache.wicket.model.IModel;
import org.apache.wicket.model.Model;
import org.apache.wicket.util.io.IClusterable;
@link
@author
public class DropDownChoicePage extends WicketExamplePage
{
private static final List<String> SITES = Arrays.asList("The Server Side", "Java Lobby", "Java.Net");
private static final List<Integer> INTEGERS = Arrays.asList(1, 2, 3);
private static final List<Service> SERVICES = new ArrayList<>();
static
{
SERVICES.add(new Service("Service0-no-group", null));
SERVICES.add(new Service("Service0.1-no-group", null));
SERVICES.add(new Service("Service1", "main"));
SERVICES.add(new Service("Service2", "main"));
SERVICES.add(new Service("Service2.1-no-group", null));
SERVICES.add(new Service("Service2.2-no-group", null));
SERVICES.add(new Service("Service3", "secondary"));
SERVICES.add(new Service("Service4", "secondary"));
SERVICES.add(new Service("Service5", "secondary"));
SERVICES.add(new Service("Service5.1-no-group", null));
SERVICES.add(new Service("Service5.2-no-group", null));
SERVICES.add(new Service("Service6", "other"));
SERVICES.add(new Service("Service6.1", "other"));
SERVICES.add(new Service("Service7-no-group", null));
SERVICES.add(new Service("Service8-no-group", null));
}
public DropDownChoicePage()
{
final Input input = new Input();
setDefaultModel(new CompoundPropertyModel<>(input));
FeedbackPanel feedbackPanel = new FeedbackPanel("feedback");
add(feedbackPanel);
Form<Void> form = new Form<Void>("form")
{
@Override
protected void onSubmit()
{
info("input: " + input);
}
};
add(form);
form.add(new DropDownChoice<>("site", SITES));
form.add(new DropDownChoice<>("integer", INTEGERS, new IChoiceRenderer<Integer>()
{
@see
@Override
public Object getDisplayValue(Integer value)
{
switch (value)
{
case 1 :
return "One";
case 2 :
return "Two";
case 3 :
return "Three";
default :
throw new IllegalStateException(value + " is not mapped!");
}
}
@see
@Override
public String getIdValue(Integer object, int index)
{
return String.valueOf(INTEGERS.get(index));
}
}));
form.add(new GroupedDropDownChoice<Service>("service", SERVICES, new IChoiceRenderer<Service>() {
@Override
public Object getDisplayValue(Service object) {
return object.getTitle();
}
}) {
@Override
protected boolean isNewGroup(Service previous, Service current) {
return previous == null || (current.getGroup() != null && !current.getGroup().equals(previous.getGroup())) ;
}
@Override
protected boolean hasNoGroup(Service current) {
return current.getGroup() == null;
}
@Override
protected IModel<String> getGroupLabel(Service current) {
return Model.of(current.getGroup());
}
});
}
private static class Service implements IClusterable
{
private final String title;
private final String group;
public Service(String title, String group) {
this.title = title;
this.group = group;
}
public String getTitle() {
return title;
}
public String getGroup() {
return group;
}
@Override
public boolean equals(Object o) {
if (this == o) return true;
if (!(o instanceof Service)) return false;
Service service = (Service) o;
return Objects.equals(title, service.title);
}
@Override
public int hashCode() {
return Objects.hash(title);
}
}
private static class Input implements IClusterable
{
public String site;
public Integer integer = INTEGERS.get(0);
public Service service = SERVICES.get(0);
@Override
public String toString()
{
return "site = '" + site + "', integer = " + integer;
}
}
@Override
protected void explain()
{
String html = "<select wicket:id=\"site\">\n" + " <option>site 1</option>\n"
+ " <option>site 2</option>\n" + "</select>\n" + "<select wicket:id=\"integer\">\n"
+ " <option>Fifty</option>\n" + " <option>Sixty</option>\n" + "</select>";
String code = "/** available sites for selection. */\n"
+ "private static final List SITES = Arrays.asList(new String[] {\"The Server Side\", \"Java Lobby\", \"Java.Net\" });\n"
+ "/** available numbers for selection. */\n"
+ "private static final List INTEGERS = Arrays.asList(new Integer[] { new Integer(1), new Integer(2), new Integer(3) });\n"
+ "\n"
+ "public DropDownChoicePage() {\n"
+ " ...\n"
+ " // Add a dropdown choice component that uses the model object's 'site' property to designate the\n"
+ " // current selection, and that uses the SITES list for the available options.\n"
+ " // Note that when the selection is null, Wicket will lookup a localized string to\n"
+ " // represent this null with key: \"id + '.null'\". In this case, this is 'site.null'\n"
+ " // which can be found in DropDownChoicePage.properties\n"
+ " form.add(new DropDownChoice(\"site\", SITES));\n"
+ "\n"
+ " // Allthough the default behavior of displaying the string representations of the choices\n"
+ " // by calling toString on the object might be alright in some cases, you usually want to have\n"
+ " // more control over it. You achieve this by providing an instance of IChoiceRenderer.\n"
+ " // Don't forget to check out the default implementation of IChoiceRenderer, ChoiceRenderer.\n"
+ " form.add(new DropDownChoice(\"integer\", INTEGERS, new IChoiceRenderer() {\n"
+ " // Gets the display value that is visible to the end user.\n"
+ " public String getDisplayValue(Object object) {\n"
+ " ...\n"
+ " }\n"
+ "\n"
+ " // Gets the value that is invisble to the end user, and that is used as the selection id.\n"
+ " public String getIdValue(Object object, int index) {\n"
+ " ...\n"
+ " }\n"
+ " }));\n" + "}";
add(new ExplainPanel(html, code));
}
}