Application: gvSIG desktop » Library: org.gvsig.tools

/* 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):

 * 2010 Institute of New Imaging Technologies (INIT): 

 *   http://www.init.uji.es

 * Geographic Information research group: 

 *   http://www.geoinfo.uji.es

 * Universitat Jaume I, Spain

 */

/**

 * 

 */

package org.gvsig.tools.swing.impl.dynobject.dynfield;

import java.awt.event.ItemEvent;

import java.awt.event.ItemListener;

import java.util.ArrayList;

import java.util.List;

import javax.swing.JComboBox;

import javax.swing.JComponent;

import org.gvsig.tools.dynobject.DynObjectValueItem;

import org.gvsig.tools.swing.api.dynobject.ValueChangedListener;

import org.gvsig.tools.swing.api.dynobject.dynfield.JDynFieldComponent;

import org.gvsig.tools.swing.api.dynobject.dynfield.ValueField;

/**

 * 

 * JDynFieldComponent that renders its available values in the form of a

 * {@link JComboBox}.

 * 

 * @author 2010 - <a href="cordinyana@gvsig.org">C?sar Ordi?ana</a> - gvSIG Team

 * @author 2010 - <a href="mailto:reinhold@uji.es">Cristian Mart?n&nbsp;</a> -

 *         gvSIG Team

 * @version $Id$

 * 

 */

public class JComboBoxDynFieldComponent extends AbstractNValueFieldComponent

    implements JDynFieldComponent, ItemListener {

    private JComboBox combo;

    private DynObjectValueItem[] items;

    private List<ValueChangedListener> listeners;

    /**

     * Constructor.

     * 

     * @param component

     *            the JDynFieldComponent object

     * 

     * @param valueField

     *            the ValueField object.

     */

    public JComboBoxDynFieldComponent(JDynFieldComponent component,

                        ValueField valueField) {

                super(component, valueField);

    }

    /*

     * (non-Javadoc)

     * 

     * @see

     * 

     * org.gvsig.tools.swing.spi.DelegatedJFieldComponent#addValueChangedListener

     * (org.gvsig.tools.swing.api.dynobject.ValueChangedListener)

     */

    @Override

    public void addValueChangedListener(ValueChangedListener listener) {

        this.listeners.add(listener);

    }

    /**

     * 

     */

    @Override

    protected void afterUI() {

        Object value = this.getInitialValue();

        Object item;

        if (value != null) {

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

                item = items[i].getValue();

                if (item == null) {

                    continue;

                }

                if (item.equals(value)) {

                    this.combo.setSelectedIndex(i + 1);

                    break;

                }

            }

        }

    }

    /*

     * (non-Javadoc)

     * 

     * @see org.gvsig.tools.swing.api.dynobject.JComponent#getComponent()

     */

    public JComponent asJComponent() {

        return this.combo;

    }

    /*

     * (non-Javadoc)

     * 

     * @see

     * org.gvsig.tools.swing.spi.DelegatedJFieldComponent#fireValueChangedEvent

     * ()

     */

    @Override

    public void fireValueChangedEvent() {

        for (ValueChangedListener listener : this.listeners) {

            listener.handleValueChanged(this);

        }

    }

    /*

     * (non-Javadoc)

     * 

     * @see org.gvsig.tools.swing.spi.DelegatedJFieldComponent#getValue()

     */

    public Object getValue() {

        int index = this.combo.getSelectedIndex();

        if (index < 1) {

            return null;

        }

        // null is at combo position 0, so the index is one unit ahead as of the

        // items index

        return this.items[index - 1].getValue();

    }

    /*

     * (non-Javadoc)

     * 

     * @see org.gvsig.tools.swing.spi.AbstractJDynField#initData()

     */

    @Override

    protected void initData() {

    }

    /**

     * 

     */

    @Override

    protected void initUI() {

        listeners = new ArrayList<ValueChangedListener>();

        items = getDynField().getAvailableValues();

        this.combo = new JComboBox();

        this.combo.addItem(null);

        for (DynObjectValueItem item : items) {

            this.combo.addItem(item.getLabel());

        }

        this.combo.setSelectedIndex(0);

        this.combo.addItemListener(this);

    }

    /*

     * (non-Javadoc)

     * 

     * @see

     * org.gvsig.tools.swing.api.dynobject.dynfield.JDynFieldComponent#isValid()

     */

    public boolean isValid() {

      boolean isNotValid = (isMandatory())&&(this.combo.getSelectedIndex()<0);

      return !isNotValid;

    }

    /*

     * (non-Javadoc)

     * 

     * @see

     * java.awt.event.ItemListener#itemStateChanged(java.awt.event.ItemEvent)

     */

    public void itemStateChanged(ItemEvent evt) {

        this.fireValueChangedEvent();

    }

    /*

     * (non-Javadoc)

     * 

     * @see

     * 

     * org.gvsig.tools.swing.api.dynobject.dynfield.JDynFieldComponent#requestFocus

     * ()

     */

    public void requestFocus() {

        this.combo.requestFocus();

    }

    /*

     * (non-Javadoc)

     * 

     * @see org.gvsig.tools.swing.spi.DelegatedJFieldComponent#saveStatus()

     */

    public void saveStatus() {

        this.setFieldValue(this.getValue());

    }

    /*

     * (non-Javadoc)

     * 

     * @see

     * 

     * org.gvsig.tools.swing.api.dynobject.dynfield.JDynFieldComponent#setEnabled

     * (boolean)

     */

    public void setEnabled(boolean isEnabled) {

        // Do nothing, it's a combobox so it's just readonly

        this.combo.setEnabled(isEnabled);

    }

    /*

     * (non-Javadoc)

     * 

     * @see

     * 

     * org.gvsig.tools.swing.api.dynobject.dynfield.JDynFieldComponent#setFieldValue

     * (java.lang.Object)

     */

    @Override

    public void setFieldValue(Object value) {

        this.getComponent().setFieldValue(value);

    }

    @Override

    protected void setJDynFieldComponentListeners() {

        // TODO Auto-generated method stub

    }

    @Override

    protected void setNonNullValue(Object value) {

        Object item;

        String label;

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

            item = this.items[i].getValue();

            if (item == null) {

                continue;

            }

            if (item.equals(value)) {

                this.setSelectedIndex(i+1);

                break;

            }

            label = this.items[i].getLabel();

            if (label == null) {

                continue;

            }

            if (label.equals(value)) {

                this.setSelectedIndex(i+1);

                break;

            }

        }

    }

    @Override

    protected void setNullValue() {

        this.combo.setSelectedIndex(0);

    }

    @Override

    protected void setReadOnly() {

        this.setEnabled(false);

    }

    public void setPrintValue(Object value) {

        // DO nothing. Override if necessary by inhereted classes.

    }

    public String getPrintValue() {

        Object value = this.combo.getSelectedItem();

        if (value != null){

            return value.toString();

        }

        return "";

    }

    @Override

    public Object getFieldValue() {

        return this.combo.getSelectedIndex();

    }

        @Override

        protected void setSelectedIndex(int index) {

                this.combo.setSelectedIndex(index);

        }

        public void handleValueChanged(JDynFieldComponent jDynFieldComponent) {

                // TODO Auto-generated method stub

        }

}