com.vaadin.ui

Class Button

java.lang.Object

com.vaadin.server.AbstractClientConnector

com.vaadin.ui.AbstractComponent

com.vaadin.ui.AbstractFocusable

com.vaadin.ui.Button

All Implemented Interfaces:

Action.ShortcutNotifier, ContextClickEvent.ContextClickNotifier, FieldEvents.BlurNotifier, FieldEvents.FocusNotifier, MethodEventSource, ClientConnector, Sizeable, Connector, Component, Component.Focusable, Serializable

Direct Known Subclasses:

NativeButton

public class Button
extends AbstractFocusable
implements Action.ShortcutNotifier

A generic button component.

Since:

3.0

Author:

Vaadin Ltd.

See Also:

Serialized Form

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	Button.ClickEvent Click event.
static interface	Button.ClickListener Interface for listening for a Button.ClickEvent fired by a Component.
static class	Button.ClickShortcut A ShortcutListener specifically made to define a keyboard shortcut that invokes a click on the given button.

Nested classes/interfaces inherited from interface com.vaadin.ui.Component

Component.ErrorEvent, Component.Event, Component.Focusable, Component.Listener

Nested classes/interfaces inherited from interface com.vaadin.server.ClientConnector

ClientConnector.AttachEvent, ClientConnector.AttachListener, ClientConnector.ConnectorErrorEvent, ClientConnector.DetachEvent, ClientConnector.DetachListener

Nested classes/interfaces inherited from interface com.vaadin.server.Sizeable

Sizeable.Unit

Field Summary

Fields

Modifier and Type	Field and Description
protected Button.ClickShortcut	clickShortcut

Fields inherited from class com.vaadin.ui.AbstractComponent

DESIGN_ATTR_PLAIN_TEXT

Fields inherited from interface com.vaadin.server.Sizeable

SIZE_UNDEFINED, UNITS_CM, UNITS_EM, UNITS_EX, UNITS_INCH, UNITS_MM, UNITS_PERCENTAGE, UNITS_PICAS, UNITS_PIXELS, UNITS_POINTS

Constructor Summary

Constructors

Constructor and Description
Button() Creates a new push button.
Button(Resource icon) Creates a new push button with the given icon.
Button(String caption) Creates a new push button with the given caption.
Button(String caption, Button.ClickListener listener) Creates a new push button with a click listener.
Button(String caption, Resource icon) Creates a new push button with the given caption and icon.

Method Summary

Modifier and Type	Method and Description
Registration	addClickListener(Button.ClickListener listener) Adds the button click listener.
void	click() Simulates a button click, notifying all server-side listeners.
protected void	fireClick() Fires a click event to all listeners without any event details.
protected void	fireClick(MouseEventDetails details) Fires a click event to all listeners.
protected Collection<String>	getCustomAttributes() Returns a collection of attributes that should not be handled by the basic implementation of the AbstractComponent.readDesign(Element, DesignContext) and AbstractComponent.writeDesign(Element, DesignContext) methods.
String	getIconAlternateText() Returns the icon's alt text.
protected ButtonState	getState() Returns the shared state bean with information to be sent from the server to the client.
protected ButtonState	getState(boolean markAsDirty) Returns the shared state for this connector.
boolean	isDisableOnClick() Determines if a button is automatically disabled when clicked.
boolean	isHtmlContentAllowed() Deprecated. as of 8.0.0, use AbstractComponent.isCaptionAsHtml() instead.
void	readDesign(org.jsoup.nodes.Element design, DesignContext designContext) Reads the component state from the given design.
void	removeClickListener(Button.ClickListener listener) Deprecated. As of 8.0, replaced by Registration.remove() in the registration object returned from addClickListener(ClickListener).
void	removeClickShortcut() Removes the keyboard shortcut previously set with setClickShortcut(int, int...).
void	setClickShortcut(int keyCode, int... modifiers) Makes it possible to invoke a click on this button by pressing the given ShortcutAction.KeyCode and (optional) ShortcutAction.ModifierKeys. The shortcut is global (bound to the containing Window).
void	setDisableOnClick(boolean disableOnClick) Determines if a button is automatically disabled when clicked.
void	setHtmlContentAllowed(boolean htmlContentAllowed) Deprecated. as of 8.0.0, use AbstractComponent.setCaptionAsHtml(boolean) instead.
void	setIcon(Resource icon, String iconAltText) Sets the component's icon and alt text.
void	setIconAlternateText(String iconAltText)
void	writeDesign(org.jsoup.nodes.Element design, DesignContext designContext) Writes the component state to the given design.

Methods inherited from class com.vaadin.ui.AbstractFocusable

addBlurListener, addFocusListener, focus, getTabIndex, setTabIndex

Methods inherited from class com.vaadin.ui.AbstractComponent

addContextClickListener, addListener, addShortcutListener, addStyleName, attach, beforeClientResponse, detach, findAncestor, fireComponentErrorEvent, fireComponentEvent, getActionManager, getCaption, getComponentError, getData, getDebugId, getDescription, getErrorMessage, getHeight, getHeightUnits, getIcon, getId, getLocale, getParent, getPrimaryStyleName, getStyleName, getWidth, getWidthUnits, isCaptionAsHtml, isConnectorEnabled, isEnabled, isOrHasAncestor, isReadOnly, isRequiredIndicatorVisible, isResponsive, isVisible, removeContextClickListener, removeListener, removeShortcutListener, removeStyleName, setCaption, setCaptionAsHtml, setComponentError, setData, setDebugId, setDescription, setDescription, setEnabled, setHeight, setHeight, setHeightUndefined, setIcon, setId, setLocale, setParent, setPrimaryStyleName, setReadOnly, setRequiredIndicatorVisible, setResponsive, setSizeFull, setSizeUndefined, setStyleName, setStyleName, setVisible, setWidth, setWidth, setWidthUndefined

Methods inherited from class com.vaadin.server.AbstractClientConnector

addAttachListener, addDetachListener, addExtension, addListener, addListener, addListener, addMethodInvocationToQueue, createState, encodeState, equals, fireEvent, getAllChildrenIterable, getConnectorId, getErrorHandler, getExtensions, getListeners, getResource, getRpcManager, getRpcProxy, getSession, getStateType, getUI, handleConnectorRequest, hashCode, hasListeners, isAttached, isThis, markAsDirty, markAsDirtyRecursive, registerRpc, registerRpc, removeAttachListener, removeDetachListener, removeExtension, removeListener, removeListener, removeListener, removeListener, requestRepaint, requestRepaintAll, retrievePendingRpcCalls, setErrorHandler, setResource, updateDiffstate

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface com.vaadin.event.Action.ShortcutNotifier

addShortcutListener, removeShortcutListener

Methods inherited from interface com.vaadin.ui.Component

addListener, addStyleName, attach, getCaption, getDescription, getIcon, getId, getLocale, getParent, getPrimaryStyleName, getStyleName, getUI, isEnabled, isVisible, removeListener, removeStyleName, setCaption, setEnabled, setIcon, setId, setParent, setPrimaryStyleName, setStyleName, setVisible

Methods inherited from interface com.vaadin.server.ClientConnector

addAttachListener, addDetachListener, beforeClientResponse, detach, encodeState, getErrorHandler, getExtensions, getRpcManager, getStateType, handleConnectorRequest, isAttached, isConnectorEnabled, markAsDirty, markAsDirtyRecursive, removeAttachListener, removeDetachListener, removeExtension, requestRepaint, requestRepaintAll, retrievePendingRpcCalls, setErrorHandler

Methods inherited from interface com.vaadin.shared.Connector

getConnectorId

Methods inherited from interface com.vaadin.server.Sizeable

getHeight, getHeightUnits, getWidth, getWidthUnits, setHeight, setHeight, setHeightUndefined, setSizeFull, setSizeUndefined, setWidth, setWidth, setWidthUndefined

Field Detail

clickShortcut

protected Button.ClickShortcut clickShortcut

Constructor Detail

Button

public Button()

Creates a new push button.

Button

public Button(String caption)

Creates a new push button with the given caption.

Parameters:

caption - the Button caption.

Button

public Button(Resource icon)

Creates a new push button with the given icon.

Parameters:

icon - the icon

Button

public Button(String caption,
              Resource icon)

Creates a new push button with the given caption and icon.

Parameters:

caption - the caption

icon - the icon

Button

public Button(String caption,
              Button.ClickListener listener)

Creates a new push button with a click listener.

Parameters:

caption - the Button caption.

listener - the Button click listener.

Method Detail

addClickListener

public Registration addClickListener(Button.ClickListener listener)

Adds the button click listener.

Parameters:

listener - the Listener to be added.

Returns:

a registration object for removing the listener

Since:

8.0

See Also:

Registration

removeClickListener

@Deprecated
public void removeClickListener(Button.ClickListener listener)

Deprecated. As of 8.0, replaced by Registration.remove() in the registration object returned from addClickListener(ClickListener).

Removes the button click listener.

Parameters:

listener - the Listener to be removed.

click

public void click()

Simulates a button click, notifying all server-side listeners. No action is taken is the button is disabled.

fireClick

protected void fireClick()

Fires a click event to all listeners without any event details. In subclasses, override fireClick(MouseEventDetails) instead of this method.

fireClick

protected void fireClick(MouseEventDetails details)

Fires a click event to all listeners.

Parameters:

details - MouseEventDetails from which keyboard modifiers and other information about the mouse click can be obtained. If the button was clicked by a keyboard event, some of the fields may be empty/undefined.

setClickShortcut

public void setClickShortcut(int keyCode,
                             int... modifiers)

Makes it possible to invoke a click on this button by pressing the given ShortcutAction.KeyCode and (optional) ShortcutAction.ModifierKeys.
The shortcut is global (bound to the containing Window).

Parameters:

keyCode - the keycode for invoking the shortcut

modifiers - the (optional) modifiers for invoking the shortcut, null for none

removeClickShortcut

public void removeClickShortcut()

Removes the keyboard shortcut previously set with setClickShortcut(int, int...).

isDisableOnClick

public boolean isDisableOnClick()

Determines if a button is automatically disabled when clicked. See setDisableOnClick(boolean) for details.

Returns:

true if the button is disabled when clicked, false otherwise

setDisableOnClick

public void setDisableOnClick(boolean disableOnClick)

Determines if a button is automatically disabled when clicked. If this is set to true the button will be automatically disabled when clicked, typically to prevent (accidental) extra clicks on a button.

Note that this is only used when the click comes from the user, not when calling click() method programmatically. Also, if developer wants to re-enable the button, it needs to be done programmatically.

Parameters:

disableOnClick - true to disable button when it is clicked, false otherwise

getState

protected ButtonState getState()

Description copied from class: AbstractComponent

Returns the shared state bean with information to be sent from the server to the client. Subclasses should override this method and set any relevant fields of the state returned by super.getState().

Overrides:

getState in class AbstractFocusable

Returns:

updated component shared state

getState

protected ButtonState getState(boolean markAsDirty)

Description copied from class: AbstractClientConnector

Returns the shared state for this connector.

Overrides:

getState in class AbstractFocusable

Parameters:

markAsDirty - true if the connector should automatically be marked dirty, false otherwise

Returns:

The shared state for this connector. Never null.

See Also:

AbstractClientConnector.getState()

setIcon

public void setIcon(Resource icon,
                    String iconAltText)

Sets the component's icon and alt text. An alt text is shown when an image could not be loaded, and read by assisitve devices.

Parameters:

icon - the icon to be shown with the component's caption.

iconAltText - String to use as alt text

getIconAlternateText

public String getIconAlternateText()

Returns the icon's alt text.

Returns:

String with the alt text

setIconAlternateText

public void setIconAlternateText(String iconAltText)

setHtmlContentAllowed

@Deprecated
public void setHtmlContentAllowed(boolean htmlContentAllowed)

Deprecated. as of 8.0.0, use AbstractComponent.setCaptionAsHtml(boolean) instead.

Set whether the caption text is rendered as HTML or not. You might need to re-theme button to allow higher content than the original text style. If set to true, the captions are passed to the browser as html and the developer is responsible for ensuring no harmful html is used. If set to false, the content is passed to the browser as plain text.

Parameters:

htmlContentAllowed - true if caption is rendered as HTML, false otherwise

isHtmlContentAllowed

@Deprecated
public boolean isHtmlContentAllowed()

Deprecated. as of 8.0.0, use AbstractComponent.isCaptionAsHtml() instead.

Return HTML rendering setting

Returns:

true if the caption text is to be rendered as HTML, false otherwise

readDesign

public void readDesign(org.jsoup.nodes.Element design,
                       DesignContext designContext)

Description copied from interface: Component

Reads the component state from the given design.

The component is responsible not only for updating its own state but also for ensuring that its children update their state based on the design.

It is assumed that the component is in its default state when this method is called. Reading should only take into consideration attributes specified in the design and not reset any unspecified attributes to their defaults.

This method must not modify the design.

Specified by:

readDesign in interface Component

Overrides:

readDesign in class AbstractComponent

Parameters:

design - The element to obtain the state from

designContext - The DesignContext instance used for parsing the design

getCustomAttributes

protected Collection<String> getCustomAttributes()

Description copied from class: AbstractComponent

Returns a collection of attributes that should not be handled by the basic implementation of the AbstractComponent.readDesign(Element, DesignContext) and AbstractComponent.writeDesign(Element, DesignContext) methods. Typically these are handled in a custom way in the overridden versions of the above methods

Overrides:

getCustomAttributes in class AbstractComponent

Returns:

the collection of attributes that are not handled by the basic implementation

writeDesign

public void writeDesign(org.jsoup.nodes.Element design,
                        DesignContext designContext)

Description copied from interface: Component

Writes the component state to the given design.

The component is responsible not only for writing its own state but also for ensuring that its children write their state to the design.

This method must not modify the component state.

Specified by:

writeDesign in interface Component

Overrides:

writeDesign in class AbstractComponent

Parameters:

design - The element to write the component state to. Any previous attributes or child nodes are not cleared.

designContext - The DesignContext instance used for writing the design