com.google.gwt.user.client.ui
Class TreeItem

java.lang.Object
  com.google.gwt.user.client.ui.UIObject
      com.google.gwt.user.client.ui.TreeItem

All Implemented Interfaces:

HasHTML, HasText

public class TreeItem
extends UIObject
implements HasHTML

An item that can be contained within a Tree.

Example

public class TreeExample implements EntryPoint {

  public void onModuleLoad() {
    // Create a tree with a few items in it.
    TreeItem root = new TreeItem("root");
    root.addItem("item0");
    root.addItem("item1");
    root.addItem("item2");

    // Add a CheckBox to the tree
    TreeItem item = new TreeItem(new CheckBox("item3"));
    root.addItem(item);

    Tree t = new Tree();
    t.addItem(root);

    // Add it to the root panel.
    RootPanel.get().add(t);
  }
}

Constructor Summary

TreeItem()
Creates an empty tree item.

TreeItem(java.lang.String html)
Constructs a tree item with the given HTML.

TreeItem(Widget widget)
Constructs a tree item with the given Widget.

Method Summary

TreeItem	addItem(java.lang.String itemText) Adds a child tree item containing the specified text.
void	addItem(TreeItem item) Adds another item as a child to this one.
TreeItem	addItem(Widget widget) Adds a child tree item containing the specified widget.
TreeItem	getChild(int index) Gets the child at the specified index.
int	getChildCount() Gets the number of children contained in this item.
int	getChildIndex(TreeItem child) Gets the index of the specified child item.
protected HasFocus	getFocusableWidget() Returns the widget, if any, that should be focused on if this TreeItem is selected.
java.lang.String	getHTML() Gets this object's contents as HTML.
TreeItem	getParentItem() Gets this item's parent.
boolean	getState() Gets whether this item's children are displayed.
java.lang.String	getText() Gets this object's text.
Tree	getTree() Gets the tree that contains this item.
java.lang.Object	getUserObject() Gets the user-defined object associated with this item.
Widget	getWidget() Gets the Widget associated with this tree item.
boolean	isSelected() Determines whether this item is currently selected.
void	remove() Removes this item from its tree.
void	removeItem(TreeItem item) Removes one of this item's children.
void	removeItems() Removes all of this item's children.
void	setHTML(java.lang.String html) Sets this object's contents via HTML.
void	setSelected(boolean selected) Selects or deselects this item.
void	setState(boolean open) Sets whether this item's children are displayed.
void	setState(boolean open, boolean fireEvents) Sets whether this item's children are displayed.
void	setText(java.lang.String text) Sets this object's text.
void	setUserObject(java.lang.Object userObj) Sets the user-defined object associated with this item.
void	setWidget(Widget newWidget) Sets the current widget.

Methods inherited from class com.google.gwt.user.client.ui.UIObject

addStyleDependentName, addStyleName, getAbsoluteLeft, getAbsoluteTop, getElement, getOffsetHeight, getOffsetWidth, getStyleElement, getStyleName, getStyleName, getStylePrimaryName, getStylePrimaryName, getTitle, isVisible, isVisible, removeStyleDependentName, removeStyleName, setElement, setHeight, setPixelSize, setSize, setStyleName, setStyleName, setStyleName, setStylePrimaryName, setStylePrimaryName, setTitle, setVisible, setVisible, setWidth, sinkEvents, toString, unsinkEvents

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

TreeItem

public TreeItem()

Creates an empty tree item.

TreeItem

public TreeItem(java.lang.String html)

Constructs a tree item with the given HTML.

Parameters:

html - the item's HTML

TreeItem

public TreeItem(Widget widget)

Constructs a tree item with the given Widget.

Parameters:

widget - the item's widget

Method Detail

addItem

public TreeItem addItem(java.lang.String itemText)

Adds a child tree item containing the specified text.

Parameters:

itemText - the text to be added

Returns:

the item that was added

addItem

public void addItem(TreeItem item)

Adds another item as a child to this one.

Parameters:

item - the item to be added

addItem

public TreeItem addItem(Widget widget)

Adds a child tree item containing the specified widget.

Parameters:

widget - the widget to be added

Returns:

the item that was added

getChild

public TreeItem getChild(int index)

Gets the child at the specified index.

Parameters:

index - the index to be retrieved

Returns:

the item at that index

getChildCount

public int getChildCount()

Gets the number of children contained in this item.

Returns:

this item's child count.

getChildIndex

public int getChildIndex(TreeItem child)

Gets the index of the specified child item.

Parameters:

child - the child item to be found

Returns:

the child's index, or -1 if none is found

getHTML

public java.lang.String getHTML()

Description copied from interface: HasHTML

Gets this object's contents as HTML.

Specified by:

getHTML in interface HasHTML

Returns:

the object's HTML

getParentItem

public TreeItem getParentItem()

Gets this item's parent.

Returns:

the parent item

getState

public boolean getState()

Gets whether this item's children are displayed.

Returns:

true if the item is open

getText

public java.lang.String getText()

Description copied from interface: HasText

Gets this object's text.

Specified by:

getText in interface HasText

Returns:

the object's text

getTree

public final Tree getTree()

Gets the tree that contains this item.

Returns:

the containing tree

getUserObject

public java.lang.Object getUserObject()

Gets the user-defined object associated with this item.

Returns:

the item's user-defined object

getWidget

public Widget getWidget()

Gets the Widget associated with this tree item.

Returns:

the widget

isSelected

public boolean isSelected()

Determines whether this item is currently selected.

Returns:

true if it is selected

remove

public void remove()

Removes this item from its tree.

removeItem

public void removeItem(TreeItem item)

Removes one of this item's children.

Parameters:

item - the item to be removed

removeItems

public void removeItems()

Removes all of this item's children.

setHTML

public void setHTML(java.lang.String html)

Description copied from interface: HasHTML

Sets this object's contents via HTML. Use care when setting an object's HTML; it is an easy way to expose script-based security problems. Consider using HasText.setText(String) whenever possible.

Specified by:

setHTML in interface HasHTML

Parameters:

html - the object's new HTML

setSelected

public void setSelected(boolean selected)

Selects or deselects this item.

Parameters:

selected - true to select the item, false to deselect it

setState

public void setState(boolean open)

Sets whether this item's children are displayed.

Parameters:

open - whether the item is open

setState

public void setState(boolean open,
                     boolean fireEvents)

Sets whether this item's children are displayed.

Parameters:

open - whether the item is open

fireEvents - true to allow open/close events to be fired

setText

public void setText(java.lang.String text)

Description copied from interface: HasText

Sets this object's text.

Specified by:

setText in interface HasText

Parameters:

text - the object's new text

setUserObject

public void setUserObject(java.lang.Object userObj)

Sets the user-defined object associated with this item.

Parameters:

userObj - the item's user-defined object

setWidget

public void setWidget(Widget newWidget)

Sets the current widget. Any existing child widget will be removed.

Parameters:

newWidget - Widget to set

getFocusableWidget

protected HasFocus getFocusableWidget()

Returns the widget, if any, that should be focused on if this TreeItem is selected.

Returns:

widget to be focused.