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/*******************************************************************************
 * Copyright (c) 2003, 2007 s IT Solutions AT Spardat GmbH .
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *     s IT Solutions AT Spardat GmbH - initial API and implementation
 *******************************************************************************/

/*
 * @(#) $Id: IMenuItem.java 9060 2012-03-06 10:06:47Z hoenninger $
 *
 *
 *
 *
 */
package at.spardat.xma.appshell;

import java.util.List;

import org.eclipse.swt.graphics.Image;

/**
 * Interface for {@link MenuItem}.
 *
 * @author s2877
 * @since 1.4.0
 */
public interface IMenuItem {

    /**
     * Get the list of all MenuItems of the submenu of this MenuItem.
     * @return the list of all MenuItems of the submenu.
     */
    List getItems();

    /**
     * Determine if the given item is contained in the submenu of this menu.
     * @param item the MenuItem to search for in the submenu.
     * @return true if the given item is contained in the list of subitems.
     */
    public boolean containsItem(IMenuItem item);

    /**
     * Determine if the given item is contained in the submenu of this menu.
     * @param item the MenuItem to search for in the submenu.
     * @param recurisvely true if the item should be searched deeply
     * @return true if the given item is contained in the list of subitems.
     */
    public boolean containsItem(IMenuItem item, boolean recurisvely);

    /**
     * Remove all MenuItems from the list of subitems.
     * The items are unregisterd from the AppShell and
     * are no longer visible.
     */
    public void clearItems();

    /**
     * Get the visual representation of the MenuItem.
     * e.g.: a {@link at.spardat.xma.mdl.tree.ITreeWMClient} or org.eclipse.swt.widget.MenuItem.
     * @return the GUI-Object corresponding to this MenuItem.
     */
    public Object getAttached();

    /**
     * Set the visual representation of the MenuItem
     * e.g.: a {@link at.spardat.xma.mdl.tree.ITreeWMClient} or org.eclipse.swt.widget.MenuItem.
     * @param attached the GUI-Object corresponding to this MenuItem.
     */
    public void setAttached(Object attached);

    /**
     * Get the visual representation of the parent MenuItem
     * @return the GUI-Object corresponding to the parent of this MenuItem.
     */
    public Object getParentAttached();

    /**
     * Get the MenuItem containing this MenuItem in its submenu.
     * @return the parent MenuItem.
     */
    public IMenuItem getParent();

    /**
     * Get the name of the MenuItem. The name must be unique within the
     * client side application.
     * @return the name of the MenuItem
     */
    public String getName();

    /**
     * Get the index of the MenuItem in the list of
     * subitems in its parent.
     * @return the index of this.
     */
    public int getIndex();

    /**
     * Get the index of the given MenuItem in the submenu of this.
     * @param item to determine the index of
     * @return the index of the given item in the submenu
     */
    public int getIndexOf(IMenuItem item);

    /**
     * Add the given MenuItem to the list of subitems.
     * The new item is registered at the AppShell and
     * becomes visible.
     * Note: A MenuItem used at a MenuAppShell (i.e. at an SWT menu) must be of the style CASCADE to have children.
     * @param item to add.
     */
    public void addItem(MenuItem item);

    /**
     * Add the given MenuItem to the list of subitems at the given index.
     * The new item is registered at the AppShell and becomes visible.
     * Note: A MenuItem used at a MenuAppShell (i.e. at an SWT menu) must be of the style CASCADE to have children.
     * @param index where to add the new item.
     * @param item to add.
     */
    public void addItem(int index, MenuItem item);

    /**
     * Remove the given MenuItem from the list of subitems.
     * This item is unregisterd from the AppShell and
     * is no longer visible.
     * @param item to remove
     */
    public void removeItem(MenuItem item);

    /**
     * Get the Task than will be called whenever this MenuItem is selected.
     * @return the Task of this item.
     */
    public ITask getTask();

    /**
     * Set the task to run when the MenuItem is selected
     * @param task the task of this item.
     */
    public void setTask(ITask task);

    /**
     * Select the MenuItem. This runs its contained Task.
     */
    public void select();

    /**
     * @return Returns the image which is shown at this item. Can be null.
     */
    public Image getImage();

    /**
     * Sets the image to show at this item.
     */
    public void setImage(Image image);

    // TODO: comment me
    public int getAccelerator ();

    // TODO: comment me
    public void setAccelerator ( int accelerator );
    
    
    /**
     *
     * If no style was set then SWT.NONE is returned.
     * @return Returns the style set at this item.
     */
    public int getStyle();

    /**
     * Enables this menu item if the argument is true,
     * and disables it otherwise. A disabled menu item is
     * not selectable from the user interface and
     * draws with an inactive or "grayed" look.
     * Disabling a menu item makes all its children not selectable, too.
     * @since 2.2.0
     */
    public void setEnabled(boolean enabled);

    /**
     * Returns true if this menu item is enabled and false
     * otherwise. A disabled menu item is not selectable from the user interface
     * and draws with an inactive or "grayed" look. A menu item is disabled, if
     * it is either directly disabled or any of its parents is disabled.
     * @since 2.2.0
     */
    public boolean isEnabled();

    /**
     * Returns false if this menu item is directly disabled by calling
     * setEnabled(false) on its instance. It does not take the enabled
     * state of its parent into account.
     * @since 2.2.0
     */
    public boolean isLocalEnabled();
    
    /**
     * Returns false if a call of this menu item does not close the
     * existing tasks but adds the task on top of the task stack.
     */
    public boolean isPreserveTasks();    
    
    /**
     * Returns true if a MenuSelectionListener is attached
     * to this menu item.
     */    
    public boolean hasMenuSelectionListener();    

}




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