Table 10-1 lists some of the widgets that can be used with GWT and their corresponding HTML element types.
Table 10-1. GWT widgets
Widget | Description |
|---|
AbsolutePanel | A panel that positions all of its children absolutely, allowing them to overlap |
Button | A standard push-button widget |
ButtonBase | The abstract base class for Button, CheckBox, and RadioButton |
CellPanel | A panel whose child widgets are contained within the cells of a table |
ChangeListenerCollection | A helper class for implementers of the SourcesChangeEvents interface |
CheckBox | A standard checkbox widget (also serves as a base class for RadioButton) |
ClickListenerCollection | A helper class for implementers of the SourcesClickEvents interface |
ComplexPanel | An abstract base class for panels that can contain multiple child widgets |
Composite | A type of widget that can wrap another widget, hiding the wrapped widget's methods |
DeckPanel | A panel that displays all of its child widgets in a "deck," where only one can be visible at a time |
DialogBox | A form of pop-up that has a caption area at the top and can be dragged by the user |
DockPanel | A panel that lays out its child widgets "docked" at its outer edges and allows its last widget to take up the remaining space in its center |
FileUpload | A widget that wraps the HTML <input type="file"> element |
FlexTable | A flexible table that creates cells on demand |
FlowPanel | A panel that formats its child widgets using the default HTML layout behavior |
FocusListenerAdapter | An adapter to simplify focus event listeners that do not need all events defined on the FocusListener interface |
FocusListenerCollection | A helper class for implementers of the SourcesFocusEvents interface |
FocusPanel | A simple panel that makes its contents focusable and adds the ability to catch mouse and keyboard events |
FocusWidget | An abstract base class for most widgets that can receive keyboard focus |
FormHandlerCollection | A helper class for widgets that accept FormHandlers |
FormPanel | A panel that wraps its contents in an HTML <form> element |
FormSubmitCompleteEvent | An Event object containing information about form submission events |
FormSubmitEvent | An Event object containing information about form submission events |
Frame | A widget that wraps an <IFRAME> element, which can contain an arbitrary web site |
Grid | A rectangular grid that can contain text, HTML, or a child widget within its cells |
HorizontalPanel | A panel that lays out all of its widgets in a single horizontal column |
HTML | A widget that can contain arbitrary HTML |
HTMLPanel | A panel that contains HTML and can attach child widgets to identified elements within that HTML |
HTMLTable | A widget that contains the common table algorithms for Grid and FlexTable |
Hyperlink | A widget that serves as an "internal" hyperlink |
Image | A widget that displays the image at a given URL |
KeyboardListenerAdapter | An adapter to simplify keyboard event listeners that do not need all events defined on the KeyboardListener interface |
KeyboardListenerCollection | A helper class for implementers of the SourcesKeyboardEvents interface |
Label | A widget that contains arbitrary text, not interpreted as HTML |
ListBox | A widget that presents a list of choices to the user, either as a listbox or as a drop-down list |
LoadListenerCollection | A helper class for implementers of the SourcesLoadEvents interface |
MenuBar | A standard menu bar widget |
MenuItem | A widget that can be placed in a MenuBar |
MouseListenerAdapter | An adapter to simplify mouse event listeners that do not need all events defined on the MouseListener interface |
MouseListenerCollection | A helper class for implementers of the SourcesMouseEvents interface |
NamedFrame | A frame that has a "name" associated with it |
Panel | An abstract base class for all panels, which are widgets that can contain other widgets |
PasswordTextBox | A text box that visually masks its input to prevent eavesdropping |
PopupListenerCollection | A helper class for implementers of the SourcesPopupEvents interface |
PopupPanel | A panel that can "pop up" over other widgets |
RadioButton | A mutually exclusive selection radio button widget |
RootPanel | The panel to which all other widgets must ultimately be added |
ScrollListenerCollection | A helper class for implementers of the SourcesScrollEvents interface |
ScrollPanel | A simple panel that wraps its contents in a scrollable area |
SimplePanel | An abstract base class for panels that contain only one widget |
StackPanel | A panel that stacks its children vertically, displaying only one at a time, with a header for each one that the user can click to display it |
TabBar | A horizontal bar of folder-style tabs, most commonly used as part of a TabPanel |
TableListenerCollection | A helper class for implementers of the SourcesTableEvents interface |
TabListenerCollection | A helper class for implementers of the SourcesTabEvents interface |
TabPanel | A panel that represents a tabbed set of pages, each of which contains another widget |
TextArea | A text box that allows multiple lines of text to be entered |
TextBox | A standard single-line text box |
TextBoxBase | An abstract base class for all text-entry widgets |
Tree | A standard hierarchical tree widget |
TreeItem | An item that can be contained within a TRee |
TreeListenerCollection | A helper class for implementers of the SourcesClickEvents interface |
UIObject | The base class for all user-interface objects |
VerticalPanel | A panel that lays out all of its widgets in a single vertical column |
Widget | The base class for the majority of user-interface objects |
