# Package org.eclipse.ui.activities

package org.eclipse.ui.activities
Application programming interfaces for interaction with and extension of the Eclipse Platform User Interface.

## Package Specification

This package provides application programming interfaces for interaction with activities. Activities are objects that may be enabled or disabled and contain bindings to various regular expressions. Activities are used by the workbench to filter selected contributions from the users view untill such a time that they express interest in using them.

Related Packages
Package
Description
org.eclipse.ui
Application programming interfaces for interaction with and extension of the Eclipse Platform User Interface.
Class
Description
ActivitiesPreferencePage
Preference page that allows configuration of the activity set.
ActivityCategoryPreferencePage
Activities preference page that primarily shows categories and can optionally show an advanced dialog that allows fine-tune adjustmenet of activities.
ActivityEvent
An instance of this class describes changes to an instance of `IActivity`.
ActivityManagerEvent
An instance of this class describes changes to an instance of `IActivityManager`.
CategoryEvent
An instance of this class describes changes to an instance of `ICategory`.
IActivity
An instance of this interface is an activity as defined by the extension point `org.eclipse.ui.activities`.
IActivityListener
An instance of this interface can be used by clients to receive notification of changes to one or more instances of `IActivity`.
IActivityManager
An instance of this interface allows clients to manage activities, as defined by the extension point `org.eclipse.ui.activities`.
IActivityManagerListener
An instance of this interface can be used by clients to receive notification of changes to one or more instances of `IActivityManager`.
IActivityPatternBinding
An instance of this interface represents a binding between an activity and a regular expression pattern.
IActivityRequirementBinding
An instance of this interface represents a binding between two activities.
ICategory
An instance of this interface is a category as defined by the extension point `org.eclipse.ui.activities`.
ICategoryActivityBinding
An instance of this interface represents a binding between a category and an activity.
ICategoryListener
An instance of this interface can be used by clients to receive notification of changes to one or more instances of `ICategory`.
IdentifierEvent
An instance of this class describes changes to an instance of `IIdentifier`.
IIdentifier
An instance of this interface can be obtained from an instance of `IActivityManager`for any identifier.
IIdentifierListener
An instance of this interface can be used by clients to receive notification of changes to one or more instances of `IIdentifier`.
IMutableActivityManager
An instance of this interface allows clients to manage activities, as defined by the extension point `org.eclipse.ui.activities`.
ITriggerPoint
A trigger point represents a place within the Workbench that has the potential to enable activities.
ITriggerPointAdvisor
The trigger point advisor is a mechanism provided by the workbench that is consulted whenever code that is considered a trigger point is hit.
ITriggerPointManager
Contains a collection of known trigger points.
IWorkbenchActivitySupport
An instance of this interface provides support for managing `IWorkbench` activities.
NotDefinedException
Signals that an attempt was made to access the properties of an undefined object.
WorkbenchActivityHelper
A utility class that contains helpful methods for interacting with the activities API.
WorkbenchTriggerPointAdvisor
Workbench implementation prompts the user with a dialog unless they've said that they don't want to be prompted.