| 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.

 *

 */

package org.gvsig.newlayer.impl.preferences;

import java.awt.GridBagConstraints;

import java.awt.GridBagLayout;

import java.awt.Insets;

import java.util.ArrayList;

import java.util.HashSet;

import java.util.List;

import java.util.Set;

import javax.swing.JCheckBox;

import javax.swing.JComponent;

import javax.swing.JPanel;

import javax.swing.event.ChangeEvent;

import javax.swing.event.ChangeListener;

import org.gvsig.newlayer.NewLayerLocator;

import org.gvsig.newlayer.NewLayerProviderFactory;

import org.gvsig.newlayer.preferences.NewLayerPreferencesComponent;

/**

 * Default implementation for the {@link NewLayerPreferencesComponent}.

 * 

 * @author gvSIG Team

 * @version $Id$

 */

public class DefaultNewLayerPreferencesComponent extends JPanel implements

    NewLayerPreferencesComponent, ChangeListener {

    private static final long serialVersionUID = -4392838062470171181L;

    private JCheckBox[] providerChecks;

    private List<NewLayerProviderFactory> providers;

    private boolean valueChanged = false;

    /**

     * Creates a new DefaultNewLayerPreferencesComponent.

     * 

     * @see JPanel#JPanel()

     */

    public DefaultNewLayerPreferencesComponent() {

        this(true);

    }

    /**

     * Creates a new DefaultNewLayerPreferencesComponent.

     * 

     * @param isDoubleBuffered

     *            a boolean, true for double-buffering, which

     *            uses additional memory space to achieve fast, flicker-free

     *            updates

     * @see JPanel#JPanel(boolean)

     */

    public DefaultNewLayerPreferencesComponent(boolean isDoubleBuffered) {

        super(isDoubleBuffered);

        initialize();

    }

    private void initialize() {

        this.setLayout(new GridBagLayout());

        Insets insets = new Insets(1, 0, 1, 0);

        GridBagConstraints gbc = new GridBagConstraints();

        gbc.gridx = 0;

        gbc.gridy = 1;

        gbc.gridheight = 1;

        gbc.gridwidth = GridBagConstraints.REMAINDER;

        gbc.fill = GridBagConstraints.NONE;

        gbc.anchor = GridBagConstraints.WEST;

        gbc.weightx = 1.0f;

        gbc.insets = insets;

        providers =

            new ArrayList<NewLayerProviderFactory>(NewLayerLocator.getManager()

                .getProviders());

        providerChecks = new JCheckBox[providers.size()];

        for (int i = 0; i < providers.size(); i++) {

            NewLayerProviderFactory factory = providers.get(i);

            providerChecks[i] =

                new JCheckBox(factory.getLabel(), factory.isEnabled());

            providerChecks[i].addChangeListener(this);

            providerChecks[i].setToolTipText(factory.getDescription());

            add(providerChecks[i], gbc);

            gbc.gridy++;

        }

    }

    public JComponent asJComponent() {

        return this;

    }

    public void initializeDefaults() {

        for (int i = 0; i < providers.size(); i++) {

            NewLayerProviderFactory factory = providers.get(i);

            providerChecks[i].setSelected(factory.isEnabled());

        }

        valueChanged = false;

        validate();

    }

    public Set<NewLayerProviderFactory> getDisabledProviders() {

        Set<NewLayerProviderFactory> disabledFactories =

            new HashSet<NewLayerProviderFactory>();

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

            if (!providerChecks[i].isSelected()) {

                disabledFactories.add(providers.get(i));

            }

        }

        return disabledFactories;

    }

    public boolean isValueChanged() {

        return valueChanged;

    }

    public void setChangesApplied() {

        valueChanged = false;

    }

    public void stateChanged(ChangeEvent e) {

        valueChanged = true;

    }

}