/*

* 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;

import java.util.Calendar;

import org.eclipse.swt.SWT;

import org.eclipse.swt.events.ModifyEvent;

import org.eclipse.swt.events.ModifyListener;

import org.eclipse.swt.graphics.Point;

import org.eclipse.swt.widgets.Composite;

import org.eclipse.swt.widgets.Control;

/**

 * Super class for all DateField Layouters. Contains their common

 * functionality.

 */

class DateFieldLayouter extends ItemLayouter

{

    /**

     * Key name for modify listener.

     */

    /**

     * Constructor.

     *

     */

    {

    }

    /**

     */

    {

    }

    /**

     *

     * @param parent where to create.

     * @return Control.

     */

    {

        DateField dateField = (DateField) item;

        DateEditor dateEditor = null;

        switch(dateField.getInputMode())

        {

        case DateField.TIME:

            dateEditor = new DateEditor(parent, SWT.NONE,

                                        DateEditor.TIME | DateEditor.COMPACT);

            break;

        case DateField.DATE:

            dateEditor = new DateEditor(parent, SWT.NONE,

                                        DateEditor.DATE | DateEditor.COMPACT);

            break;

        case DateField.DATE_TIME:

            dateEditor = new DateEditor(parent, SWT.NONE,

                                        DateEditor.DATE_TIME | DateEditor.COMPACT);

            break;

        default:

            break;

        }

        if(dateField.getTimeZone() != null)

        {

            dateEditor.setTimeZone(dateField.getTimeZone());

        }

        if(dateField.getDate() != null)

        {

            dateEditor.setDate(dateField.getDate());

        }

    }

    /**

     * Add listeners to Layouter specific control.

     */

    void eswtAddSpecificListeners(Item item, Control control)

    {

    }

    /**

     * Remove listeners from Layouter specific control.

     */

    void eswtRemoveSpecificListeners(Item item, Control control)

    {

        if(listener != null)

        {

        }

    }

    /**

     * Returns if this eSWT control is Layouter specific.

     */

    boolean eswtIsSpecificControl(Item item, Control control)

    {

        return (control instanceof DateEditor);

    }

    /**

     * Updates the values of DateField.

     */

    {

    }

    /**

     * Handles key events when DateField is selected. If moving to the right or

     * left focus stays in DateField and only the selection inside of DateField

     * is changed. Otherwise method returns false and allows form to transfer

     * focus.

     */

    boolean eswtOfferKeyPressed(Item item, int key)

    {

        if(key == SWT.ARROW_LEFT || key == SWT.ARROW_RIGHT)

        {

        }

        return false;

    }

    /**

     * Returns the minimum area needed to display a DateField.

     *

     * @param datefield DateField object.

     * @return Minimum area needed to display DateField.

     */

    static Point calculateMinimumBounds(final DateField datefield)

    {

        ESWTUIThreadRunner.syncExec(new Runnable()

        {

            public void run()

            {

            }

        });

    }

    /**

     * Returns the preferred area needed to display an Item.

     *

     * @param item Item.

     * @return Preferred area needed to display Item. x is width and y is

     *         height.

     */

    {

        ESWTUIThreadRunner.syncExec(new Runnable()

        {

            public void run()

            {

            }

        });

    }

    /**

     * Class that receives events from DateEditor and updates DateField's value.

     */

    class DateEditorModifyListener implements ModifyListener

    {

        private DateField dateField;

        /**

        public DateEditorModifyListener(DateField dateField)

        {

            this.dateField = dateField;

        }

        /**

        public void modifyText(ModifyEvent e)

        {

            // Actions needed only if value is adjusted. Compare values

            // depending of dateField's type and exit if values are same.

            if(!isEqualDate(dateField, (DateEditor) e.getSource()))

            {

                dateField.internalSetDate(((DateEditor) e.getSource()).getDate());

                // notify item state listener

                dateField.notifyStateChanged();

            }

        }

    }

    /**

     * Compares date-values of DateField and DateEditor and if values are same,

     * returns true. Method checks the input mode of DateField and compares only

     * values that are visible in DateField.

     *

     * @param dateField  DateField to compare.

     * @param dateEditor DateEditor to compare.

     *

     * @return true if values are equal.

     */

    private boolean isEqualDate(DateField dateField, DateEditor dateEditor)

    {

        Calendar c1 = Calendar.getInstance();

        Calendar c2 = Calendar.getInstance();

        if(dateField.getDate() != null && dateEditor.getDate() != null)

        {

            // set dates of calendars

            c1.setTime(dateField.getDate());

            c2.setTime(dateEditor.getDate());

            switch(dateField.getInputMode())

            {

            case DateField.DATE:

                if((c1.get(Calendar.DAY_OF_MONTH) == c2.get(Calendar.DAY_OF_MONTH))

                        && (c1.get(Calendar.MONTH) == c2.get(Calendar.MONTH))

                        && (c1.get(Calendar.YEAR) == c2.get(Calendar.YEAR)))

                {

                    return true;

                }

                break;

            case DateField.TIME:

                if((c1.get(Calendar.MINUTE) == c2.get(Calendar.MINUTE))

                        && (c1.get(Calendar.HOUR_OF_DAY) == c2.get(Calendar.HOUR_OF_DAY)))

                {

                    return true;

                }

                break;

            case DateField.DATE_TIME:

                if((c1.get(Calendar.DAY_OF_MONTH) == c2.get(Calendar.DAY_OF_MONTH))

                        && (c1.get(Calendar.MONTH) == c2.get(Calendar.MONTH))

                        && (c1.get(Calendar.YEAR) == c2.get(Calendar.YEAR))

                        && (c1.get(Calendar.MINUTE) == c2.get(Calendar.MINUTE))

                        && (c1.get(Calendar.HOUR_OF_DAY) == c2.get(Calendar.HOUR_OF_DAY)))

                {

                    return true;

                }

                break;

            default:

                break;

            }

        }

        return false;

    }

}