/*

* Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies).

* All rights reserved.

* This component and the accompanying materials are made available

* under the terms of "Eclipse Public License v1.0"

* which accompanies this distribution, and is available

* at the URL "http://www.eclipse.org/legal/epl-v10.html".

*

* Initial Contributors:

* Nokia Corporation - initial contribution.

*

* Contributors:

*

* Description: 

*

*/

package javax.microedition.lcdui;

abstract class FormLayoutPolicy {

    /**

     * Layouts the Form.

     *

     * @param startItem item from which to start Layout;

     */

    abstract void layoutForm(int startItem);

    /**

     * Set focus to an item.

     */

    abstract void setCurrentItem(Item item);

    /**

     * Called when Form becomes current Displayable.

     */

    abstract void handleShowCurrentEvent();

    /**

     * Called when Form stops being current Displayable.

     */

    abstract void handleHideCurrentEvent();

    /**

     * Called when Form is being resized.

     *

     * @param width new width

     * @param height new height

     */

    abstract void handleResizeEvent(int width, int height);

    /**

     * Handle key event.

     *

     * @param keyCode key

     * @param keyType type

     */

    abstract void handleKeyEvent(int keyCode, int keyType);

    /**

     * Handle pointer event.

     *

     * @param x coordinate relative to scrolledComposite

     * @param y coordinate relative to scrolledComposite

     * @param type event type: SWT.MouseDown, SWT.MouseMove, SWT.MouseUp

     */

    abstract void handlePointerEvent(int x, int y, int type);

    /**

     * Set scrolling of form composite.

     */

    abstract void updateScrolling(int value, boolean keyNavi);

    /**

     * Get the layouted conrol of an item.

     *

     * @param item item

     * @return layouted control

     */

    abstract org.eclipse.swt.widgets.Control getItemControl(Item item);

    /**

     * Gets layouter that can layout the specified item.

     *

     * @param item Item to be layouted.

     * @return ItemLayouter or null if no Layouter found.

     */

    abstract ItemLayouter getLayouter(Item item);    

}