CheckBox Tree Node (Ext GWT)
/*
* Ext GWT - Ext for GWT
* Copyright(c) 2007-2009, Ext JS, LLC.
* licensing@extjs.com
*
* http://extjs.com/license
*/
package com.google.gwt.sample.hello.client;
import java.io.Serializable;
import com.extjs.gxt.ui.client.data.BaseTreeModel;
import com.extjs.gxt.ui.client.data.ModelData;
import com.extjs.gxt.ui.client.event.ButtonEvent;
import com.extjs.gxt.ui.client.event.CheckChangedEvent;
import com.extjs.gxt.ui.client.event.CheckChangedListener;
import com.extjs.gxt.ui.client.event.Events;
import com.extjs.gxt.ui.client.event.FieldEvent;
import com.extjs.gxt.ui.client.event.Listener;
import com.extjs.gxt.ui.client.event.SelectionListener;
import com.extjs.gxt.ui.client.event.TreePanelEvent;
import com.extjs.gxt.ui.client.store.TreeStore;
import com.extjs.gxt.ui.client.util.Format;
import com.extjs.gxt.ui.client.widget.Info;
import com.extjs.gxt.ui.client.widget.LayoutContainer;
import com.extjs.gxt.ui.client.widget.button.Button;
import com.extjs.gxt.ui.client.widget.form.SimpleComboBox;
import com.extjs.gxt.ui.client.widget.form.ComboBox.TriggerAction;
import com.extjs.gxt.ui.client.widget.layout.FlowData;
import com.extjs.gxt.ui.client.widget.toolbar.LabelToolItem;
import com.extjs.gxt.ui.client.widget.toolbar.SeparatorToolItem;
import com.extjs.gxt.ui.client.widget.toolbar.ToolBar;
import com.extjs.gxt.ui.client.widget.treepanel.TreePanel;
import com.extjs.gxt.ui.client.widget.treepanel.TreePanel.CheckCascade;
import com.extjs.gxt.ui.client.widget.treepanel.TreePanel.CheckNodes;
import com.google.gwt.core.client.EntryPoint;
import com.google.gwt.user.client.Element;
import com.google.gwt.user.client.ui.RootPanel;
public class Hello implements EntryPoint {
public void onModuleLoad() {
RootPanel.get().add(new CheckBoxTreePanelExample());
}
}
class CheckBoxTreePanelExample extends LayoutContainer {
@Override
protected void onRender(Element parent, int index) {
super.onRender(parent, index);
Folder model = getTreeModel();
TreeStore<ModelData> store = new TreeStore<ModelData>();
store.add(model.getChildren(), true);
final TreePanel<ModelData> tree = new TreePanel<ModelData>(store);
tree.setDisplayProperty("name");
//tree.getStyle().setLeafIcon(Resources.ICONS.music());
tree.setCheckable(true);
tree.setAutoLoad(true);
// overall checked state changes
tree.addCheckListener(new CheckChangedListener<ModelData>() {
@Override
public void checkChanged(CheckChangedEvent<ModelData> event) {
}
});
// change in node check state
tree.addListener(Events.CheckChange, new Listener<TreePanelEvent<ModelData>>() {
public void handleEvent(TreePanelEvent<ModelData> be) {
}
});
final SimpleComboBox<String> cascade = new SimpleComboBox<String>();
cascade.setTriggerAction(TriggerAction.ALL);
cascade.setEditable(false);
cascade.add("Parent");
cascade.add("Children");
cascade.add("None");
cascade.setSimpleValue("Parent");
cascade.addListener(Events.Change, new Listener<FieldEvent>() {
public void handleEvent(FieldEvent be) {
String val = cascade.getSimpleValue();
if ("Parent".equals(val)) {
tree.setCheckStyle(CheckCascade.PARENTS);
} else if ("Children".equals(val)) {
tree.setCheckStyle(CheckCascade.CHILDREN);
} else {
tree.setCheckStyle(CheckCascade.NONE);
}
}
});
final SimpleComboBox<String> checkNodes = new SimpleComboBox<String>();
checkNodes.setTriggerAction(TriggerAction.ALL);
checkNodes.setEditable(false);
checkNodes.add("Both");
checkNodes.add("Leaf");
checkNodes.add("Parent");
checkNodes.setSimpleValue("Both");
checkNodes.addListener(Events.Change, new Listener<FieldEvent>() {
public void handleEvent(FieldEvent be) {
String val = checkNodes.getSimpleValue();
if ("Parent".equals(val)) {
tree.setCheckNodes(CheckNodes.PARENT);
} else if ("Leaf".equals(val)) {
tree.setCheckNodes(CheckNodes.LEAF);
} else {
tree.setCheckNodes(CheckNodes.BOTH);
}
}
});
ToolBar toolBar = new ToolBar();
toolBar.setBorders(true);
toolBar.add(new Button("Get Checked", new SelectionListener<ButtonEvent>() {
public void componentSelected(ButtonEvent ce) {
StringBuffer sb = new StringBuffer();
for (ModelData item : tree.getCheckedSelection()) {
sb.append(", " + (String) item.get("name"));
}
String s = sb.toString();
if (s.length() > 1) s = s.substring(2);
Info.display("Checked Items", Format.ellipse(s, 100), "");
}
}));
toolBar.add(new SeparatorToolItem());
toolBar.add(new LabelToolItem("Cascade Behavior: "));
toolBar.add(cascade);
toolBar.add(new SeparatorToolItem());
toolBar.add(new LabelToolItem("CheckNode Behavior: "));
toolBar.add(checkNodes);
add(toolBar, new FlowData(10));
add(tree, new FlowData(10));
}
public static Folder getTreeModel() {
Folder[] folders = new Folder[] {
new Folder("Beethoven",
new Folder[] {
new Folder("Quartets",
new Music[] {
new Music("Six String Quartets", "Beethoven", "Quartets"),
new Music("Three String Quartets", "Beethoven", "Quartets"),
new Music("Grosse Fugue for String Quartets", "Beethoven",
"Quartets"),}),
new Folder("Sonatas", new Music[] {
new Music("Sonata in A Minor", "Beethoven", "Sonatas"),
new Music("Sonata in F Major", "Beethoven", "Sonatas"),}),
new Folder("Concertos", new Music[] {
new Music("No. 1 - C", "Beethoven", "Concertos"),
new Music("No. 2 - B-Flat Major", "Beethoven", "Concertos"),
new Music("No. 3 - C Minor", "Beethoven", "Concertos"),
new Music("No. 4 - G Major", "Beethoven", "Concertos"),
new Music("No. 5 - E-Flat Major", "Beethoven", "Concertos"),}),
new Folder("Symphonies", new Music[] {
new Music("No. 1 - C Major", "Beethoven", "Symphonies"),
new Music("No. 2 - D Major", "Beethoven", "Symphonies"),
new Music("No. 3 - E-Flat Major", "Beethoven", "Symphonies"),
new Music("No. 4 - B-Flat Major", "Beethoven", "Symphonies"),
new Music("No. 5 - C Minor", "Beethoven", "Symphonies"),
new Music("No. 6 - F Major", "Beethoven", "Symphonies"),
new Music("No. 7 - A Major", "Beethoven", "Symphonies"),
new Music("No. 8 - F Major", "Beethoven", "Symphonies"),
new Music("No. 9 - D Minor", "Beethoven", "Symphonies"),}),}),
new Folder("Brahms",
new Folder[] {
new Folder("Concertos", new Music[] {
new Music("Violin Concerto", "Brahms", "Concertos"),
new Music("Double Concerto - A Minor", "Brahms", "Concertos"),
new Music("Piano Concerto No. 1 - D Minor", "Brahms", "Concertos"),
new Music("Piano Concerto No. 2 - B-Flat Major", "Brahms",
"Concertos"),}),
new Folder("Quartets",
new Music[] {
new Music("Piano Quartet No. 1 - G Minor", "Brahms", "Quartets"),
new Music("Piano Quartet No. 2 - A Major", "Brahms", "Quartets"),
new Music("Piano Quartet No. 3 - C Minor", "Brahms", "Quartets"),
new Music("String Quartet No. 3 - B-Flat Minor", "Brahms",
"Quartets"),}),
new Folder("Sonatas", new Music[] {
new Music("Two Sonatas for Clarinet - F Minor", "Brahms", "Sonatas"),
new Music("Two Sonatas for Clarinet - E-Flat Major", "Brahms",
"Sonatas"),}),
new Folder("Symphonies", new Music[] {
new Music("No. 1 - C Minor", "Brahms", "Symphonies"),
new Music("No. 2 - D Minor", "Brahms", "Symphonies"),
new Music("No. 3 - F Major", "Brahms", "Symphonies"),
new Music("No. 4 - E Minor", "Brahms", "Symphonies"),}),}),
new Folder("Mozart", new Folder[] {new Folder("Concertos", new Music[] {
new Music("Piano Concerto No. 12", "Mozart", "Concertos"),
new Music("Piano Concerto No. 17", "Mozart", "Concertos"),
new Music("Clarinet Concerto", "Mozart", "Concertos"),
new Music("Violin Concerto No. 5", "Mozart", "Concertos"),
new Music("Violin Concerto No. 4", "Mozart", "Concertos"),}),}),};
Folder root = new Folder("root");
for (int i = 0; i < folders.length; i++) {
root.add((Folder) folders[i]);
}
return root;
}
}
class Music extends BaseTreeModel {
public Music() {
}
public Music(String name) {
set("name", name);
}
public Music(String name, String author, String genre) {
set("name", name);
set("author", author);
set("genre", genre);
}
public String getName() {
return (String) get("name");
}
public String getAuthor() {
return (String) get("author");
}
public String getGenre() {
return (String) get("genre");
}
public String toString() {
return getName();
}
}
class Folder extends BaseTreeModel implements Serializable {
private static int ID = 0;
public Folder() {
set("id", ID++);
}
public Folder(String name) {
set("id", ID++);
set("name", name);
}
public Folder(String name, BaseTreeModel[] children) {
this(name);
for (int i = 0; i < children.length; i++) {
add(children[i]);
}
}
public Integer getId() {
return (Integer) get("id");
}
public String getName() {
return (String) get("name");
}
public String toString() {
return getName();
}
}
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