wicket的tree的简单实例

package com.hou.wicket; import java.util.ArrayList; import java.util.List; import java.util.Set; import javax.swing.text.AbstractDocument.Content; import org.apache.wicket.Component; import org.apache.wicket.markup.ComponentTag; import org.apache.wicket.markup.html.IHeaderResponse; import org.apache.wicket.markup.html.form.Button; import org.apache.wicket.markup.html.form.ChoiceRenderer; import org.apache.wicket.markup.html.form.DropDownChoice; import org.apache.wicket.markup.html.form.Form; import org.apache.wicket.markup.html.link.Link; import org.apache.wicket.markup.html.tree.AbstractTree; import org.apache.wicket.model.AbstractReadOnlyModel; import org.apache.wicket.model.IModel; import org.apache.wicket.model.PropertyModel; /** * @author Sven Meier */ public abstract class AdvancedTreePage extends AbstractTreePage { private static final long serialVersionUID = 1L; private Behavior theme; private AbstractTree<Foo> tree; private FooProvider provider = new FooProvider(); private Content content; private List<Content> contents; private List<Behavior> themes; /** * Construct. */ public AdvancedTreePage() { content = new CheckedFolderContent(provider); Form<Void> form = new Form<Void>("form"); add(form); tree = createTree(provider, new FooExpansionModel()); tree.add(new Behavior() { private static final long serialVersionUID = 1L; @Override public void onComponentTag(Component component, ComponentTag tag) { theme.onComponentTag(component, tag); } @Override public void renderHead(Component component, IHeaderResponse response) { theme.renderHead(component, response); } }); form.add(tree); form.add(new DropDownChoice<Content>("content", new PropertyModel<Content>(this, "content"), initContents(), new ChoiceRenderer<Content>("class.simpleName")) { private static final long serialVersionUID = 1L; @Override protected boolean wantOnSelectionChangedNotifications() { return true; } }); form.add(new DropDownChoice<Behavior>("theme", new PropertyModel<Behavior>(this, "theme"), initThemes(), new ChoiceRenderer<Behavior>("class.simpleName")) { private static final long serialVersionUID = 1L; @Override protected boolean wantOnSelectionChangedNotifications() { return true; } }); form.add(new Link<Void>("expandAll") { private static final long serialVersionUID = 1L; @Override public void onClick() { FooExpansion.get().expandAll(); } }); form.add(new Link<Void>("collapseAll") { private static final long serialVersionUID = 1L; @Override public void onClick() { FooExpansion.get().collapseAll(); } }); form.add(new Button("submit") { private static final long serialVersionUID = 1L; @Override public void onSubmit() { } }); } protected abstract AbstractTree<Foo> createTree(FooProvider provider, IModel<Set<Foo>> state); private List<Content> initContents() { contents = new ArrayList<Content>(); contents.add(new BookmarkableFolderContent(tree)); contents.add(new LabelContent()); contents.add(new MultiLineLabelContent()); contents.add(new FolderContent()); contents.add(new EditableFolderContent()); contents.add(new SelectableFolderContent(provider)); contents.add(new MultiSelectableFolderContent(provider)); contents.add(new CheckedFolderContent(provider)); contents.add(new CheckedSelectableFolderContent(provider)); contents.add(new PanelContent()); contents.add(new MixedContent(contents)); content = contents.get(0); return contents; } private List<Behavior> initThemes() { themes = new ArrayList<Behavior>(); themes.add(new WindowsTheme()); themes.add(new HumanTheme()); theme = themes.get(0); return themes; } @Override public void detachModels() { for (Content content : contents) { content.detach(); } super.detachModels(); } protected Component newContentComponent(String id, IModel<Foo> model) { return content.newContentComponent(id, tree, model); } private class FooExpansionModel extends AbstractReadOnlyModel<Set<Foo>> { @Override public Set<Foo> getObject() { return FooExpansion.get(); } } }