com.vaadin.client

Interface ComponentConnector

All Superinterfaces:

Connector, HasWidget, Serializable, ServerConnector

All Known Subinterfaces:

DirectionalManagedLayout, HasErrorIndicator, HasRequiredIndicator, ManagedLayout, SimpleManagedLayout, ValueChangeHandler.Owner

All Known Implementing Classes:

AbsoluteLayoutConnector, AbstractColorPickerConnector, AbstractComponentConnector, AbstractComponentContainerConnector, AbstractDateFieldConnector, AbstractFieldConnector, AbstractFocusableListingConnector, AbstractHasComponentsConnector, AbstractInlineDateFieldConnector, AbstractLayoutConnector, AbstractListingConnector, AbstractMultiSelectConnector, AbstractOrderedLayoutConnector, AbstractSingleComponentContainerConnector, AbstractSingleSelectConnector, AbstractSplitPanelConnector, AbstractTextFieldConnector, AbstractTextualDateConnector, AccordionConnector, AudioConnector, BrowserFrameConnector, ButtonConnector, CheckBoxConnector, CheckBoxGroupConnector, ColorPickerAreaConnector, ColorPickerConnector, ColorPickerGradientConnector, ColorPickerGridConnector, ComboBoxConnector, CompositeConnector, CssLayoutConnector, CustomComponentConnector, CustomFieldConnector, CustomLayoutConnector, DateFieldConnector, DateTimeFieldConnector, DragAndDropWrapperConnector, EmbeddedConnector, FlashConnector, FormLayoutConnector, GridConnector, GridLayoutConnector, HorizontalLayoutConnector, HorizontalSplitPanelConnector, ImageConnector, InlineDateFieldConnector, InlineDateTimeFieldConnector, JavaScriptComponentConnector, LabelConnector, LegacyConnector, LinkConnector, ListSelectConnector, LoginFormConnector, MediaBaseConnector, MenuBarConnector, NativeButtonConnector, NativeSelectConnector, PanelConnector, PasswordFieldConnector, PopupDateFieldConnector, PopupDateTimeFieldConnector, PopupViewConnector, ProgressBarConnector, RadioButtonGroupConnector, RichTextAreaConnector, SliderConnector, TabsheetBaseConnector, TabsheetConnector, TextAreaConnector, TextFieldConnector, TextualDateConnector, TreeGridConnector, TwinColSelectConnector, UIConnector, UnknownComponentConnector, UploadConnector, VerticalLayoutConnector, VerticalSplitPanelConnector, VideoConnector, WindowConnector

public interface ComponentConnector
extends HasWidget

An interface used by client-side widgets or paintable parts to receive updates from the corresponding server-side components in the form of UIDL. Updates can be sent back to the server using the ApplicationConnection#updateVariable() methods.

Method Summary

Modifier and Type	Method and Description
boolean	delegateCaptionHandling() Return true if parent handles caption, false if the paintable handles the caption itself.
void	flush() Called for the active (focused) connector when a situation occurs that the focused connector might have buffered changes which need to be processed before other activity takes place.
LayoutManager	getLayoutManager()
AbstractComponentState	getState() Gets the current shared state of the connector.
TooltipInfo	getTooltipInfo(com.google.gwt.dom.client.Element element) Gets the tooltip info for the given element.
boolean	hasTooltip() Check whether there might be a tooltip for this component.
boolean	isRelativeHeight() Returns true if the height of this paintable is currently relative.
boolean	isRelativeWidth() Returns true if the width of this paintable is currently relative.
boolean	isUndefinedHeight() Returns true if the height of this paintable is currently undefined.
boolean	isUndefinedWidth() Returns true if the width of this paintable is currently undefined.
void	setWidgetEnabled(boolean widgetEnabled) Sets the enabled state of the widget associated to this connector.

Methods inherited from interface com.vaadin.client.HasWidget

getWidget

Methods inherited from interface com.vaadin.client.ServerConnector

addStateChangeHandler, addStateChangeHandler, doInit, fireEvent, getChildren, getConnection, getParent, getRpcImplementations, getTag, hasEventListener, isEnabled, onUnregister, removeStateChangeHandler, removeStateChangeHandler, setChildren, setParent, setTag, updateEnabledState

Methods inherited from interface com.vaadin.shared.Connector

getConnectorId

Method Detail

getState

AbstractComponentState getState()

Description copied from interface: ServerConnector

Gets the current shared state of the connector. Note that state is considered an internal part of the connector. You should not rely on the state object outside of the connector who owns it. If you depend on the state of other connectors you should use their public API instead of their state object directly.

Specified by:

getState in interface ServerConnector

Returns:

state The shared state object. Can be any sub type of SharedState. Never null.

getLayoutManager

LayoutManager getLayoutManager()

isUndefinedWidth

boolean isUndefinedWidth()

Returns true if the width of this paintable is currently undefined. If the width is undefined, the actual width of the paintable is defined by its contents.

Returns:

true if the width is undefined, else false

isUndefinedHeight

boolean isUndefinedHeight()

Returns true if the height of this paintable is currently undefined. If the height is undefined, the actual height of the paintable is defined by its contents.

Returns:

true if the height is undefined, else false

isRelativeWidth

boolean isRelativeWidth()

Returns true if the width of this paintable is currently relative. If the width is relative, the actual width of the paintable is a percentage of the size allocated to it by its parent.

Returns:

true if the width is undefined, else false

isRelativeHeight

boolean isRelativeHeight()

Returns true if the height of this paintable is currently relative. If the height is relative, the actual height of the paintable is a percentage of the size allocated to it by its parent.

Returns:

true if the width is undefined, else false

delegateCaptionHandling

boolean delegateCaptionHandling()

Return true if parent handles caption, false if the paintable handles the caption itself.

This should always return true and all components should let the parent handle the caption and use other attributes for internal texts in the component

Returns:

true if caption handling is delegated to the parent, false if parent should not be allowed to render caption

setWidgetEnabled

void setWidgetEnabled(boolean widgetEnabled)

Sets the enabled state of the widget associated to this connector.

Parameters:

widgetEnabled - true if the widget should be enabled, false otherwise

getTooltipInfo

TooltipInfo getTooltipInfo(com.google.gwt.dom.client.Element element)

Gets the tooltip info for the given element.

When overriding this method, hasTooltip() should also be overridden to return true in all situations where this method might return a non-empty result.

Parameters:

element - The element to lookup a tooltip for

Returns:

The tooltip for the element or null if no tooltip is defined for this element.

hasTooltip

boolean hasTooltip()

Check whether there might be a tooltip for this component. The framework will only add event listeners for automatically handling tooltips (using getTooltipInfo(Element)) if this method returns true.

This is only done to optimize performance, so in cases where the status is not known, it's safer to return true so that there will be a tooltip handler even though it might not be needed in all cases.

Returns:

true if some part of the component might have a tooltip, otherwise false

flush

void flush()

Called for the active (focused) connector when a situation occurs that the focused connector might have buffered changes which need to be processed before other activity takes place.

This is currently called when the user changes the fragment using the back/forward button in the browser and allows the focused field to submit its value to the server before the fragment change event takes place.