/*

* 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 org.eclipse.swt.graphics.Point;

/**

 * Item representing a non-editable string.

 */

public class StringItem extends Item {

    private String text;

    private int appearanceMode;

    private Font font;

    /**

     * Constructor, creates a new StringItem with appearance mode PLAIN.

     *

     * @param label Label of StringItem.

     * @param txt Text of StringItem.

     */

    public StringItem(String label, String txt) {

        this(label, txt, Item.PLAIN);

    }

    /**

     * Constructor.

     *

     * @param label Label of the item, or null if no label.

     * @param txt Textual content of the item, or null if no initial textual

     *            content.

     * @param appMode Appearance mode of this item. This must be one of the

     *            appearance modes defined in Item-class.

     * @throws IllegalArgumentException If appearance mode is not one defined in

     *             Item-class.

     */

    public StringItem(String label, String txt, int appMode) {

        if ((appMode != Item.PLAIN) && (appMode != Item.BUTTON)

                && (appMode != Item.HYPERLINK)) {

            throw new IllegalArgumentException(

                    MsgRepository.STRINGITEM_EXCEPTION_INVALID_APPMODE);

        }

        appearanceMode = appMode;

        setLabel(label);

        setText(txt);

        font = Font.getDefaultFont();

    }

    /**

     * Gets the textual content of this item.

     *

     * @return Text of the item. Could return null if the text is empty.

     */

    public String getText() {

        return text;

    }

    /**

     * Sets the text of this item.

     *

     * @param newTxt Text to be set. If null, text is set to be empty.

     */

    public void setText(String newTxt) {

        if ((newTxt == null) || (newTxt.equals(""))) {

            text = null;

        }

        else {

            text = newTxt;

        }

        updateParent(UPDATE_SIZE_CHANGED);

    }

    /**

     * Gets current appearance mode.

     *

     * @return The one of appearance modes defined in Item-class.

     */

    public int getAppearanceMode() {

        return appearanceMode;

    }

    /**

     * Gives hint which font this item should use. System may ignore this

     * request.

     *

     * @param f Font to be used. If null, system will use default font for this

     *            item.

     */

    public void setFont(Font f) {

        font = (f == null ? Font.getDefaultFont() : f);

        updateParent(UPDATE_SIZE_CHANGED);

    }

    /**

     * Gets font that is set by calling setFont()-method. Note that returned

     * font is not necessary the font used with this item.

     *

     * @return Font set by setFont()-method.

     */

    public Font getFont() {

        return font;

    }

    /* (non-Javadoc)

     * @see midp3javax.microedition.lcdui.Item#isFocusable()

     */

    boolean isFocusable() {

        return (getNumCommands() > 0);

    }

    /**

     * Calculates minimum size of this item.

     *

     * @return Minimum size.

     */

    Point calculateMinimumSize() {

        return StringItemLayouter.calculateMinimumBounds(this);

    }

    /**

     * Calculates preferred size of this item.

     *

     * @return Preferred size.

     */

    Point calculatePreferredSize() {

        return StringItemLayouter.calculatePreferredBounds(this);

    }

    /**

     * Return layout with optional custom flags.

     *

     * @return layout directive

     */

    int internalGetLayout() {

        if (hasLabel() && !isSizeLocked()) {

            return super.internalGetLayout() | Item.LAYOUT_NEWLINE_BEFORE;

        }

        else {

            return super.internalGetLayout();

        }

    }

}