| gvSIG desktop 1

/* gvSIG. Geographic Information System of the Valencian Government

 *

 * Copyright (C) 2007-2008 Infrastructures and Transports Department

 * of the Valencian Government (CIT)

 *

 * This program is free software; you can redistribute it and/or

 * modify it under the terms of the GNU General Public License

 * as published by the Free Software Foundation; either version 2

 * of the License, or (at your option) any later version.

 *

 * This program is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 *

 * You should have received a copy of the GNU General Public License

 * along with this program; if not, write to the Free Software

 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,

 * MA  02110-1301, USA.

 *

 */

/*

 * AUTHORS (In addition to CIT):

 * 2008 {DiSiD Technologies}  {New extension for installation and update of text translations}

 */

package org.gvsig.i18n.extension.preferences.table;

import java.util.Locale;

import javax.swing.table.AbstractTableModel;

import org.gvsig.i18n.I18nException;

import org.gvsig.i18n.I18nManager;

import org.gvsig.i18n.Messages;

/**

 * TableModel to show the list of available Locales in gvSIG.

 *

 * @author <a href="mailto:dcervera@disid.com">David Cervera</a>

 */

public class LocaleTableModel extends AbstractTableModel {

    // Start from 0 to enable de locale column again

    public static final int COLUMN_LOCALE = -1;

    public static final int COLUMN_LANGUAGE = 0;

    public static final int COLUMN_COUNTRY = 1;

    public static final int COLUMN_VARIANT = 2;

    public static final int COLUMN_ACTIVE = 3;

    private static final long serialVersionUID = -3855372372788577788L;

    private final I18nManager manager;

    private Locale[] locales;

    private int currentLocaleIndex;

    private int originalLocaleIndex;

    /**

     * Creates a LocaleTableModel with a I18nManager to handle locales.

     */

    public LocaleTableModel(I18nManager manager) {

        this.manager = manager;

        loadLocales();

    }

    public int getColumnCount() {

        return 4;

    }

    public int getRowCount() {

        return locales.length;

    }

    public Object getValueAt(int rowIndex, int columnIndex) {

        switch (columnIndex) {

        case COLUMN_LOCALE:

            return locales[rowIndex];

        case COLUMN_LANGUAGE:

            return manager.getLanguageDisplayName(locales[rowIndex]);

        case COLUMN_COUNTRY:

            return locales[rowIndex].getDisplayCountry();

        case COLUMN_VARIANT:

            return locales[rowIndex].getDisplayVariant();

        case COLUMN_ACTIVE:

            return rowIndex == currentLocaleIndex ? Boolean.TRUE

                    : Boolean.FALSE;

        }

        return null;

    }

    public String getColumnName(int columnIndex) {

        switch (columnIndex) {

        case COLUMN_LOCALE:

            return Messages.getText("I18nPreferencePage.Locale_code");

        case COLUMN_LANGUAGE:

            return Messages.getText("I18nPreferencePage.Idioma");

        case COLUMN_COUNTRY:

            return Messages.getText("I18nPreferencePage.Pais");

        case COLUMN_VARIANT:

            return Messages.getText("I18nPreferencePage.Variante");

        case COLUMN_ACTIVE:

            return Messages.getText("I18nPreferencePage.Activar");

        }

        return "";

    }

    public Class getColumnClass(int columnIndex) {

        switch (columnIndex) {

        case COLUMN_LOCALE:

        case COLUMN_LANGUAGE:

        case COLUMN_COUNTRY:

        case COLUMN_VARIANT:

            return String.class;

        case COLUMN_ACTIVE:

            return Boolean.class;

        }

        return Object.class;

    }

    public boolean isCellEditable(int rowIndex, int columnIndex) {

        return columnIndex == 3;

    }

    public void setValueAt(Object value, int rowIndex, int columnIndex) {

        // Only edit current locale value

        if (columnIndex == COLUMN_ACTIVE && Boolean.TRUE.equals(value)) {

            setSelectedLocale(rowIndex, columnIndex);

        }

    }

    /**

     * Returns the {@link Locale} shown in a table row.

     *

     * @param rowIndex

     *            the table row index

     * @return the {@link Locale}

     */

    public Locale getLocale(int rowIndex) {

            return rowIndex >= 0 ? locales[rowIndex] : null;

    }

    /**

     * Removes and uninstalls a locale.

     *

     * @param locale

     *            to remove

     * @throws I18nException

     *             if there is an error removing a Locale

     */

    public void removeLocale(Locale locale) throws I18nException {

        int rowIndex = getLocaleRowIndex(locale);

        manager.uninstallLocale(locale);

        loadLocales();

        fireTableRowsDeleted(rowIndex, rowIndex);

    }

    /**

     * Reloads the list of installed locales.

     */

    public void reloadLocales() {

        loadLocales();

        fireTableDataChanged();

    }

    public void saveSelectedLocale() {

        manager.setCurrentLocale(getSelectedLocale());

        originalLocaleIndex = currentLocaleIndex;

    }

    public void selectPreviousLocale() {

        setSelectedLocale(originalLocaleIndex, COLUMN_ACTIVE);

    }

    /**

     *

     */

    public void selectDefaultLocale() {

        Locale defLocale = manager.getDefaultSystemLocale();

        int pos = getLocaleRowIndex(defLocale);

        // Maybe the locale has country and/or variant and is not registered

        // (ex: en_US). Look for the locale with only the language (ex: en).

        if (pos == -1) {

            defLocale = new Locale(defLocale.getLanguage());

            pos = getLocaleRowIndex(defLocale);

        }

        // If the locale could'nt be found, use English as default

        if (pos == -1) {

            pos = getLocaleRowIndex(I18nManager.ENGLISH);

        }

        setSelectedLocale(pos, COLUMN_ACTIVE);

    }

    public boolean isValueChanged() {

        return currentLocaleIndex != originalLocaleIndex;

    }

    public void setChangesApplied() {

        originalLocaleIndex = currentLocaleIndex;

    }

    /**

     * Sets the current selected locale.

     */

    public void setSelectedLocale(Locale locale) {

        int localeIndex = getLocaleRowIndex(locale);

        setSelectedLocale(localeIndex);

    }

    /**

     * Returns the current selected locale.

     */

    public Locale getSelectedLocale() {

        Locale selected = getLocale(currentLocaleIndex);

        return selected == null ? manager.getCurrentLocale() : selected;

    }

    private void setSelectedLocale(int rowIndex) {

        setSelectedLocale(rowIndex, 0);

    }

    private void setSelectedLocale(int rowIndex, int columnIndex) {

        int oldCurrentLocaleIndex = currentLocaleIndex;

        currentLocaleIndex = rowIndex;

        fireTableCellUpdated(oldCurrentLocaleIndex, columnIndex);

        fireTableCellUpdated(rowIndex, columnIndex);

    }

    /**

     * Loads the locales from the I18nManager.

     */

    private void loadLocales() {

        locales = manager.getInstalledLocales();

        Locale currentLocale = manager.getCurrentLocale();

        currentLocaleIndex = getLocaleRowIndex(currentLocale);

        originalLocaleIndex = currentLocaleIndex;

    }

    /**

     * Returns the table row position for a Locale.

     */

    private int getLocaleRowIndex(Locale locale) {

        for (int i = 0; i < locales.length; i++) {

            if (locale.equals(locales[i])) {

                return i;

            }

        }

        return -1;

    }

}