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/*******************************************************************************
* Copyright (c) 2000, 2015 IBM Corporation and others.
*
* This program and the accompanying materials
* are made available under the terms of the Eclipse Public License 2.0
* which accompanies this distribution, and is available at
* https://www.eclipse.org/legal/epl-2.0/
*
* SPDX-License-Identifier: EPL-2.0
*
* Contributors:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.jface.action;
import org.eclipse.pde.api.tools.annotations.NoImplement;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.CoolBar;
import org.eclipse.swt.widgets.Menu;
import org.eclipse.swt.widgets.ToolBar;
/**
* A contribution item represents a contribution to a shared UI resource such as
* a menu or tool bar. More generally, contribution items are managed by a
* contribution manager. For instance, in a tool bar a contribution item is a
* tool bar button or a separator. In a menu bar a contribution item is a menu,
* and in a menu a contribution item is a menu item or separator.
*
* A contribution item can realize itself in different SWT widgets, using the
* different fill methods. The same type of contribution item can
* be used with a MenuBarManager, ToolBarManager,
* CoolBarManager, or a StatusLineManager.
*
*
* This interface is internal to the framework; it should not be implemented
* outside the framework.
*
*
* @see IContributionManager
*/
@NoImplement
public interface IContributionItem {
/**
* Disposes of this contribution item. Called by the parent
* contribution manager when the manager is being disposed.
* Clients should not call this method directly, unless they
* have removed this contribution item from the containing
* IContributionManager before the contribution lifecycle
* has ended.
*
* @since 2.1
*/
void dispose();
/**
* Fills the given composite control with controls representing this
* contribution item. Used by StatusLineManager.
*
* @param parent the parent control
*/
void fill(Composite parent);
/**
* Fills the given menu with controls representing this contribution item.
* Used by MenuManager.
*
* @param parent the parent menu
* @param index the index where the controls are inserted,
* or -1 to insert at the end
*/
void fill(Menu parent, int index);
/**
* Fills the given tool bar with controls representing this contribution item.
* Used by ToolBarManager.
*
* @param parent the parent tool bar
* @param index the index where the controls are inserted,
* or -1 to insert at the end
*/
void fill(ToolBar parent, int index);
/**
* Fills the given cool bar with controls representing this contribution item.
* Used by CoolBarManager.
*
* @param parent the parent cool bar
* @param index the index where the controls are inserted,
* or -1 to insert at the end
* @since 3.0
*/
void fill(CoolBar parent, int index);
/**
* Returns the identifier of this contribution item.
* The id is used for retrieving an item from its manager.
*
* @return the contribution item identifier, or null
* if none
*/
String getId();
/**
* Returns whether this contribution item is enabled.
*
* @return true if this item is enabled
*/
boolean isEnabled();
/**
* Returns whether this contribution item is dirty. A dirty item will be
* recreated when the action bar is updated.
*
* @return true if this item is dirty
*/
boolean isDirty();
/**
* Returns whether this contribution item is dynamic. A dynamic contribution
* item contributes items conditionally, dependent on some internal state.
*
* @return true if this item is dynamic, and
* false for normal items
*/
boolean isDynamic();
/**
* Returns whether this contribution item is a group marker.
* This information is used when adding items to a group.
*
* @return true if this item is a group marker, and
* false for normal items
*
* @see GroupMarker
* @see IContributionManager#appendToGroup(String, IContributionItem)
* @see IContributionManager#prependToGroup(String, IContributionItem)
*/
boolean isGroupMarker();
/**
* Returns whether this contribution item is a separator.
* This information is used to enable hiding of unnecessary separators.
*
* @return true if this item is a separator, and
* false for normal items
* @see Separator
*/
boolean isSeparator();
/**
* Returns whether this contribution item is visibile within its manager.
*
* @return true if this item is visible, and
* false otherwise
*/
boolean isVisible();
/**
* Saves any state information of the control(s) owned by this contribution item.
* The contribution manager calls this method before disposing of the controls.
*
* @since 3.0
*/
void saveWidgetState();
/**
* Sets the parent manager of this item
*
* @param parent the parent contribution manager
* @since 2.0
*/
void setParent(IContributionManager parent);
/**
* Sets whether this contribution item is visibile within its manager.
*
* @param visible true if this item should be visible, and
* false otherwise
*/
void setVisible(boolean visible);
/**
* Updates any SWT controls cached by this contribution item with any
* changes which have been made to this contribution item since the last update.
* Called by contribution manager update methods.
*/
void update();
/**
* Updates any SWT controls cached by this contribution item with changes
* for the the given property.
*
* @param id the id of the changed property
* @since 2.0
*/
void update(String id);
}