com.whitestein.lsps.vaadin.forms

Class WImage

java.lang.Object

com.whitestein.lsps.vaadin.forms.FormComponent

com.whitestein.lsps.vaadin.forms.WImage

All Implemented Interfaces:

com.vaadin.event.ConnectorEventListener, com.vaadin.server.ClientConnector.AttachListener, Serializable, EventListener

public class WImage
extends FormComponent

Author:

mvy

See Also:

Serialized Form

Field Summary

Fields inherited from class com.whitestein.lsps.vaadin.forms.FormComponent

form, INTERNAL_STATE_RECORD_PROPERTY

Fields inherited from interface com.vaadin.server.ClientConnector.AttachListener

attachMethod

Constructor Summary

Constructors

Constructor and Description
WImage()

Method Summary

Modifier and Type	Method and Description
protected com.vaadin.ui.AbstractComponent	createWidget() Called once, to create the actual Vaadin component.
RecordHolder	getSource()
com.vaadin.ui.Image	getWidget() Gets the Vaadin representation of this component.
protected void	restoreInternalState(Map<String,Object> state) Restores the UI state of this component which was previously written by FormComponent.writeInternalState(Map).
void	setSource(RecordHolder resource) Sets the image resource.
protected void	writeInternalState(Map<String,Object> state) Writes the UI state of this component to the provided map.

Methods inherited from class com.whitestein.lsps.vaadin.forms.FormComponent

addDataErrorMessage, addStyleName, attach, call, clearDataErrorMessages, createEvent, equals, getCaption, getComponentAlignment, getContextClickHandler, getCustomErrorMessage, getDataErrorMessages, getDescription, getExpandRatio, getHasChildrenAdapter, getHeight, getIcon, getModelingId, getNamespace, getStyleName, getTabIndex, getWidth, hashCode, isEnabled, isReadOnly, isVisible, localize, markAsDirty, preventGC, removeStyleName, restoreState, saveState, setCaption, setComponentAlignment, setContextClickHandler, setContextMenuItems, setCustomErrorMessage, setDescription, setEnabled, setExpandRatio, setHeight, setIcon, setReadOnly, setStyleName, setTabIndex, setVisible, setWidth, toString

Methods inherited from class java.lang.Object

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

Constructor Detail

WImage

public WImage()

Method Detail

createWidget

protected com.vaadin.ui.AbstractComponent createWidget()

Description copied from class: FormComponent

Called once, to create the actual Vaadin component.

Specified by:

createWidget in class FormComponent

Returns:

the actual Vaadin component, may be null if the component has no UI counterpart.

getWidget

public com.vaadin.ui.Image getWidget()

Description copied from class: FormComponent

Gets the Vaadin representation of this component.

Overrides:

getWidget in class FormComponent

Returns:

the Vaadin representation of this form component.

setSource

public void setSource(RecordHolder resource)

Sets the image resource. The resource is used to obtain the image data.

Parameters:

resource - the resource to set

getSource

public RecordHolder getSource()

Returns:

the image resource

writeInternalState

protected void writeInternalState(Map<String,Object> state)

Description copied from class: FormComponent

Writes the UI state of this component to the provided map. The written state is later used to restore the UI when a saved document or saved Todo is reopened.

Many UI attributes such as size, caption, etc. are not held in the records but are stored exclusively in the Vaadin components. In the records the getter/setter methods of such attributes directly delegate to the underlying component. For the purposes of the Save Document/Todo use case the state of such attributes has to be preserved.

Subclasses should override this method. The overriding method should call super.writeInternalState(state) to store the state form the super class as well. The attributes should be written to the provided state parameter. The type of the values written to the state can only by Java representation of LSPS types. That is java.util.Date, java.lang.String, Decimal, RecordHolder, ListHolder, ... The name of the attributes stored in the map should be unique and should not collide with the names used by any of the superclass. It is the responsibility of the overridden method to ensure that.

Subclasses overriding this method should also override FormComponent.restoreInternalState(Map) and restore the state written by this method.

Overrides:

writeInternalState in class FormComponent

Parameters:

state - a map to which this method should write the component's UI state.

See Also:

FormComponent.restoreInternalState(Map), FormComponent.saveState()

restoreInternalState

protected void restoreInternalState(Map<String,Object> state)

Description copied from class: FormComponent

Restores the UI state of this component which was previously written by FormComponent.writeInternalState(Map). Subclasses should override and call super.restoreInternalState(state);

Overrides:

restoreInternalState in class FormComponent

Parameters:

state - a map of attributes and their values

See Also:

FormComponent.writeInternalState(Map)