Java Doc for IFocusService.java in  » IDE-Eclipse » ui-workbench » org » eclipse » ui » swt » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » IDE Eclipse » ui workbench » org.eclipse.ui.swt 
Source Cross Reference  Class Diagram Java Document (Java Doc) 


org.eclipse.ui.swt.IFocusService

All known Subclasses:   org.eclipse.ui.internal.menus.FocusControlSourceProvider,
IFocusService
public interface IFocusService (Code)
Tracks focusGained and focusLost events for a Control registered with this service, and provides the control and its registered ID as variables to the application evaluation context for evaluation be the various services.

This service provides 2 variables, activeFocusControl (a Control) and activeFocusControlId (the ID registered with the service).

You can use this service to provide default cut/copy/paste/selectAll for specific text controls outside of the normal workbench part lifecycle, like a control contributed to the trim. For example:

 <handler
 class="org.eclipse.ui.internal.handlers.WidgetMethodHandler:paste"
 commandId="org.eclipse.ui.edit.paste">
 <activeWhen>
 <with variable="activeFocusControlId">
 <equals value="org.eclipse.ui.tests.focusText"/>
 </with>
 </activeWhen>
 </handler>
 


See Also:   org.eclipse.ui.ISources
since:
   3.3


Field Summary
final public static  StringCOPY_HANDLER
     Use the value to provide default copy behaviour in a handler element class attribute.
final public static  StringCUT_HANDLER
     Use the value to provide default cut behaviour in a handler element class attribute.
final public static  StringPASTE_HANDLER
     Use the value to provide default paste behaviour in a handler element class attribute.
final public static  StringSELECT_ALL_HANDLER
     Use the value to provide default select all behaviour in a handler element class attribute.


Method Summary
public  voidaddFocusTracker(Control control, String id)
     A Control for which the service will track focus.
public  voidremoveFocusTracker(Control control)
     No longer track focus events for this control.

Field Detail
COPY_HANDLER
final public static String COPY_HANDLER(Code)
Use the value to provide default copy behaviour in a handler element class attribute.



CUT_HANDLER
final public static String CUT_HANDLER(Code)
Use the value to provide default cut behaviour in a handler element class attribute.



PASTE_HANDLER
final public static String PASTE_HANDLER(Code)
Use the value to provide default paste behaviour in a handler element class attribute.



SELECT_ALL_HANDLER
final public static String SELECT_ALL_HANDLER(Code)
Use the value to provide default select all behaviour in a handler element class attribute.





Method Detail
addFocusTracker
public void addFocusTracker(Control control, String id)(Code)
A Control for which the service will track focus. When in focus, this Control and its ID will be provided as variables to core expressions for the various services, as activeFocusControl and activeFocusControlId respectively.

A control must only be registered once, but different controls can be registered with the same ID. Expressions evaluated against the activeFocusControlId would then be true for all of the controls thus registered.

We will remove ourselves as a listener when the Control is disposed.


Parameters:
  control - the control. Must not be null. If the controlis already registered with this service this call is a no-op.
Parameters:
  id - an ID for this control. Must not be null.



removeFocusTracker
public void removeFocusTracker(Control control)(Code)
No longer track focus events for this control. Use this method when the control should no longer be tracked, but is not disposed.
Parameters:
  control - the control registered with the service. Must not benull.



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