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+/* *************************************************************************
+ 
+                               IT Mill Toolkit 
+
+               Development of Browser User Intarfaces Made Easy
+
+                    Copyright (C) 2000-2006 IT Mill Ltd
+                     
+   *************************************************************************
+
+   This product is distributed under commercial license that can be found
+   from the product package on license/license.txt. Use of this product might 
+   require purchasing a commercial license from IT Mill Ltd. For guidelines 
+   on usage, see license/licensing-guidelines.html
+
+   *************************************************************************
+   
+   For more information, contact:
+   
+   IT Mill Ltd                           phone: +358 2 4802 7180
+   Ruukinkatu 2-4                        fax:   +358 2 4802 7181
+   20540, Turku                          email:  info@itmill.com
+   Finland                               company www: www.itmill.com
+   
+   Primary source for information and releases: www.itmill.com
+
+   ********************************************************************** */
+
+package com.itmill.toolkit.demo.features;
+
+import java.util.Iterator;
+
+import com.itmill.toolkit.event.Action;
+import com.itmill.toolkit.ui.*;
+
+public class FeatureTree extends Feature implements Action.Handler {
+
+	private static final String[] firstnames =
+		new String[] {
+			"John",
+			"Mary",
+			"Joe",
+			"Sarah",
+			"Jeff",
+			"Jane",
+			"Peter",
+			"Marc",
+			"Josie",
+			"Linus" };
+	private static final String[] lastnames =
+		new String[] {
+			"Torvalds",
+			"Smith",
+			"Jones",
+			"Beck",
+			"Sheridan",
+			"Picard",
+			"Hill",
+			"Fielding",
+			"Einstein" };
+
+	private Tree t;
+
+	private boolean actionsActive = false;
+	private Button actionHandlerSwitch =
+		new Button("Activate actions", this, "toggleActions");
+
+	public FeatureTree() {
+		super();
+	}
+
+	public void toggleActions() {
+		if (actionsActive) {
+			t.removeActionHandler(this);
+			actionsActive = false;
+			actionHandlerSwitch.setCaption("Activate Actions");
+		} else {
+			t.addActionHandler(this);
+			actionsActive = true;
+			actionHandlerSwitch.setCaption("Deactivate Actions");
+		}
+	}
+
+	public void expandAll() {
+		for (Iterator i = t.rootItemIds().iterator();i.hasNext();) {
+			t.expandItemsRecursively(i.next());
+		}
+	}
+	
+	public void collapseAll() {
+		for (Iterator i = t.rootItemIds().iterator();i.hasNext();) {		
+			t.collapseItemsRecursively(i.next());
+		}		
+	}
+	
+	protected Component getDemoComponent() {
+
+		OrderedLayout l = new OrderedLayout();
+
+		// Create names
+		Panel show = new Panel("Tree component");
+		String[] names = new String[100];
+		for (int i = 0; i < names.length; i++)
+			names[i] =
+				firstnames[(int) (Math.random() * (firstnames.length - 1))]
+					+ " "
+					+ lastnames[(int) (Math.random() * (lastnames.length - 1))];
+
+		// Create tree
+		t = new Tree("Family Tree");
+		for (int i = 0; i < 100; i++) {
+			t.addItem(names[i]);
+			String parent = names[(int) (Math.random() * (names.length - 1))];
+			if (t.containsId(parent))
+				t.setParent(names[i], parent);
+		}
+
+		// Forbid childless people to have children (makes them leaves)
+		for (int i = 0; i < 100; i++)
+			if (!t.hasChildren(names[i]))
+				t.setChildrenAllowed(names[i], false);
+
+		show.addComponent(t);
+		l.addComponent(show);
+
+		// Actions
+		l.addComponent(this.actionHandlerSwitch);
+		
+		// Expand and Collapse buttons 
+		l.addComponent(new Button("Expand All",this,"expandAll"));
+		l.addComponent(new Button("Collapse All",this,"collapseAll"));
+
+		// Properties
+		PropertyPanel p = new PropertyPanel(t);
+		Form ap = p.createBeanPropertySet(new String[] { "selectable" });
+		Select themes = (Select) p.getField("style");
+		themes
+			.addItem("menu")
+			.getItemProperty(themes.getItemCaptionPropertyId())
+			.setValue("menu");
+		p.addProperties("Tree Properties", ap);
+		l.addComponent(p);
+
+		return l;
+	}
+
+	protected String getExampleSrc() {
+		return "// Create tree\n"
+			+ "t = new Tree(\"Family Tree\");\n"
+			+ "for (int i = 0; i < 100; i++) {\n"
+			+ "	t.addItem(names[i]);\n"
+			+ "	String parent = names[(int) (Math.random() * (names.length - 1))];\n"
+			+ "	if (t.containsId(parent)) \n"
+			+ "		t.setParent(names[i],parent);\n"
+			+ "}\n\n"
+			+ "// Forbid childless people to have children (makes them leaves)\n"
+			+ "for (int i = 0; i < 100; i++)\n"
+			+ "	if (!t.hasChildren(names[i]))\n"
+			+ "		t.setChildrenAllowed(names[i], false);\n";
+	}
+
+	protected String getDescriptionXHTML() {
+		return "<p>A tree is a natural way to represent datasets that have"
+			+ " hierarchical relationships, such as filesystems, message "
+			+ "threads or... family trees. Millstone features a versatile "
+			+ "and powerful Tree component that works much like the tree components "
+			+ "of most modern operating systems. </p>"
+			+ "<p>The most prominent use of the Tree component is to "
+			+ "use it for displaying a hierachical menu, like the "
+			+ "menu on the left side of the screen for instance "
+			+ "or to display filesystems or other hierarchical datasets.</p>"
+			+ "<p>The tree component uses <code>Container</code> "
+			+ "datasources much like the Table component, "
+			+ "with the addition that it also utilizes the hierarchy "
+			+ "information maintained by the container. </p><p>On "
+			+ "the demo tab you can try out how the different properties "
+			+ "affect the presentation of the tree component.</p>";
+	}
+
+	protected String getImage() {
+		return "tree.jpg";
+	}
+
+	protected String getTitle() {
+		return "Tree";
+	}
+
+	private Action ACTION1 = new Action("Action 1");
+	private Action ACTION2 = new Action("Action 2");
+	private Action ACTION3 = new Action("Action 3");
+
+	private Action[] actions = new Action[] { ACTION1, ACTION2, ACTION3 };
+
+	public Action[] getActions(Object target, Object sender) {
+		return actions;
+	}
+
+	public void handleAction(Action action, Object sender, Object target) {
+		t.setDescription(
+			"Last action clicked was '"
+				+ action.getCaption()
+				+ "' on item '"
+				+ target
+				+ "'");
+	}
+}