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package com.itmill.toolkit.demo.featurebrowser;
import com.itmill.toolkit.data.Item;
import com.itmill.toolkit.data.Property;
import com.itmill.toolkit.data.Property.ValueChangeEvent;
import com.itmill.toolkit.event.Action;
import com.itmill.toolkit.ui.CustomComponent;
import com.itmill.toolkit.ui.Label;
import com.itmill.toolkit.ui.OrderedLayout;
import com.itmill.toolkit.ui.TextField;
import com.itmill.toolkit.ui.Tree;
/**
*
*/
public class TreeExample extends CustomComponent implements Action.Handler,
Tree.ValueChangeListener {
private static final Action ADD = new Action("Add item");
private static final Action DELETE = new Action("Delete item");
private static final Action[] actions = new Action[] { ADD, DELETE };
private static final Object CAPTION_PROPERTY = "caption";
private static final String desc = "Select an item in the tree to edit it's"
+ " caption. Right-click to add or remove items.";
Tree tree;
TextField tf;
public TreeExample() {
OrderedLayout main = new OrderedLayout();
main.setMargin(true);
setCompositionRoot(main);
// Description
main.addComponent(new Label(desc));
// Caption editor
tf = new TextField("Edit item caption");
tf.setImmediate(true);
tf.setEnabled(false);
tf.setColumns(15);
main.addComponent(tf);
// Add tree with a few items
tree = new Tree();
tree.setImmediate(true);
tree.addContainerProperty(CAPTION_PROPERTY, String.class, "");
tree.setItemCaptionMode(Tree.ITEM_CAPTION_MODE_PROPERTY);
tree.setItemCaptionPropertyId(CAPTION_PROPERTY);
for (int i = 1; i <= 3; i++) {
Object id = addCaptionedItem("Section " + i, null);
tree.expandItem(id);
addCaptionedItem("Team A", id);
addCaptionedItem("Team B", id);
}
tree.addListener(this);
tree.addActionHandler(this);
main.addComponent(tree);
}
public Action[] getActions(Object target, Object sender) {
return actions;
}
public void handleAction(Action action, Object sender, Object target) {
if (action == DELETE) {
tree.removeItem(target);
} else {
// Add
Object id = addCaptionedItem("New Item", target);
tree.expandItem(target);
tree.setValue(id);
tf.focus();
}
}
public void valueChange(ValueChangeEvent event) {
Object id = tree.getValue();
if (event.getProperty() == tree) {
if (id == null) {
tf.removeListener(this);
tf.setValue("");
tf.setEnabled(false);
} else {
tf.setEnabled(true);
Item item = tree.getItem(id);
tf.setValue(item.getItemProperty(CAPTION_PROPERTY).getValue());
tf.addListener(this);
}
} else {
// TextField
if (id != null) {
Item item = tree.getItem(id);
Property p = item.getItemProperty(CAPTION_PROPERTY);
p.setValue(tf.getValue());
tree.requestRepaint();
}
}
}
private Object addCaptionedItem(String caption, Object parent) {
Object id = tree.addItem();
Item item = tree.getItem(id);
Property p = item.getItemProperty("caption");
p.setValue(caption);
if (parent != null) {
tree.setParent(id, parent);
}
return id;
}
}
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