Follow Techotopia on Twitter

On-line Guides
All Guides
eBook Store
iOS / Android
Linux for Beginners
Office Productivity
Linux Installation
Linux Security
Linux Utilities
Linux Virtualization
Linux Kernel
System/Network Admin
Programming
Scripting Languages
Development Tools
Web Development
GUI Toolkits/Desktop
Databases
Mail Systems
openSolaris
Eclipse Documentation
Techotopia.com
Virtuatopia.com

How To Guides
Virtualization
General System Admin
Linux Security
Linux Filesystems
Web Servers
Graphics & Desktop
PC Hardware
Windows
Problem Solutions
Privacy Policy

  




 

 

Eclipse GMF Guide
Previous Page Home Next Page

Runtime

Package org.eclipse.gmf.runtime.common.ui.services.action.filter

Provides a set of classes to help in evaluating expressions for Eclipse plug-in action enablement and visibility.

See:
           Description

Class Summary
AbstractActionFilterProvider The parent of all action filter providers.
ActionFilterService A service that provides action filters that can be used in evaluating action expressions.
ActionFilterService.ProviderDescriptor A descriptor for action filter providers defined by a configuration element.
TestAttributeOperation An operation that performs attribute tests by determining whether a specific attribute matches the state of a target object.
 

Package org.eclipse.gmf.runtime.common.ui.services.action.filter Description

Provides a set of classes to help in evaluating expressions for Eclipse plug-in action enablement and visibility. The ActionFilterService allows clients to extend the action filters supported by objects selected in workbench. It also permits the entire workbench selection to be considered so that an action can be enabled if it is supported on one or more elements in the selection.

To add a new attribute to an object for action filtering, the object must implement the IAdaptable interface and an adapter factory must be registered that returns the ActionFilterService when the object is adapted to IActionFilter. An org.eclipse.gmf.runtime.common.ui.services.action.filter.IActionFilterProvider can then be registered to provide the test for the attribute using the org.eclipse.gmf.runtime.common.ui.services.action.actionFilterProviders extension point.

Such attributes are named in objectState elements which evaluate the attribute state of each object in the current selection for enablement or visibility criteria (see the org.eclipse.ui.popupMenus extension point for details). Eclipse documentation states that if each object in the selection has the specified attribute state, the expression is evaluated as true. However, this is not necessarily the case for attributes defined by an action filter provider, which can optionally evaluate the expression to true if one or more of the objects in the selection has the specified attribute state. The meaning of the value of the attribute (the objectState value) is defined by the action filter provider.

Action filter providers should be implemented by extending the AbstractActionFilterProvider class in this package.


Runtime

Guidelines for using Eclipse APIs.

Copyright (c) IBM Corp., Borland Software Corp., and others 2005,2006. All rights reserved.


 
 
  Published under the terms of the Eclipse Public License Version 1.0 ("EPL") Design by Interspire