| gvSIG desktop 1

/* gvSIG. Sistema de Informaci?n Geogr?fica de la Generalitat Valenciana

 *

 * Copyright (C) 2007 IVER T.I. and Generalitat Valenciana.

 *

 * 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., 59 Temple Place - Suite 330, Boston, MA  02111-1307,USA.

 */

package org.gvsig.rastertools.properties.panels;

import java.awt.FlowLayout;

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;

import java.awt.event.FocusEvent;

import java.awt.event.FocusListener;

import javax.swing.BorderFactory;

import javax.swing.JCheckBox;

import javax.swing.JPanel;

import javax.swing.JSlider;

import javax.swing.JTextField;

import javax.swing.border.TitledBorder;

import javax.swing.event.ChangeEvent;

import javax.swing.event.ChangeListener;

import com.iver.andami.PluginServices;

/**

 * Panel con el slider para regular la opacidad de la capa.

 *

 * @author Nacho Brodin (nachobrodin@gmail.com)

 */

public class TranspOpacitySliderPanel extends JPanel implements ActionListener, FocusListener, ChangeListener{

        final private static long serialVersionUID = 0;

        private JCheckBox         cbTransparencia  = null;

        private JCheckBox         cbOpacidad       = null;

        private JSlider           slOpacidad       = null;

        private JTextField        tOpacidad        = null;

        /**

         * Constructor.

         */

        public TranspOpacitySliderPanel() {

                initialize();

        }

        /**

         * This method initializes this

         * @return void

         */

        private void initialize() {

                setBorder(BorderFactory.createTitledBorder(null, PluginServices.getText(this, "opacidad"), TitledBorder.DEFAULT_JUSTIFICATION, TitledBorder.DEFAULT_POSITION, null, null));

                setLayout(new FlowLayout());

                add(getOpacityCheck(), null);

                add(getOpacitySlider(), null);

                add(getOpacityText(), null);

        }

        /**

         * Inicializa controles a sus valores por defecto

         */

        public void initControls() {

                this.getOpacityText().setText("100");

                this.setActiveOpacityControl(false);

        }

        /**

         * This method initializes jCheckBox

         * @return javax.swing.JCheckBox

         */

        public JCheckBox getTransparencyCheck() {

                if (cbTransparencia == null) {

                        cbTransparencia = new JCheckBox();

                        cbTransparencia.setText(PluginServices.getText(this, "activar"));

                        cbTransparencia.addActionListener(this);

                }

                return cbTransparencia;

        }

        /**

         * This method initializes jCheckBox1

         * @return javax.swing.JCheckBox

         */

        public JCheckBox getOpacityCheck() {

                if (cbOpacidad == null) {

                        cbOpacidad = new JCheckBox();

                        cbOpacidad.setText(PluginServices.getText(this, "activar"));

                        cbOpacidad.addActionListener(this);

                        cbOpacidad.addFocusListener(this);

                }

                return cbOpacidad;

        }

        /**

         * This method initializes jSlider

         * @return javax.swing.JSlider

         */

        public JSlider getOpacitySlider() {

                if (slOpacidad == null) {

                        slOpacidad = new JSlider();

//                         slOpacidad.setPreferredSize(new java.awt.Dimension(wSlider, 16));

                        slOpacidad.addChangeListener(this);

                }

                return slOpacidad;

        }

        /**

         * This method initializes jTextField3

         * @return javax.swing.JTextField

         */

        public JTextField getOpacityText() {

                if (tOpacidad == null) {

                        tOpacidad = new JTextField();

                        tOpacidad.setPreferredSize(new java.awt.Dimension(30, 19));

                        tOpacidad.addActionListener(this);

                        tOpacidad.addFocusListener(this);

                }

                return tOpacidad;

        }

        /**

         * Activa/Desactiva los controles de opacidad

         * @param active

         */

        public void setActiveOpacityControl(boolean active) {

                this.getOpacityCheck().setSelected(active);

                this.getOpacitySlider().setEnabled(active);

                this.getOpacityText().setEnabled(active);

        }

        /**

         * Asigna el valor de opacidad a los controles de la ventana para que cuando

         * esta se abra tenga los valores seleccionados en la imagen.

         * @param alpha

         */

        public void setOpacity(int alpha) {

                int opacityPercent = (int) ((alpha * 100) / 255);

                this.getOpacityText().setText(String.valueOf(opacityPercent));

                this.getOpacitySlider().setValue(opacityPercent);

                this.setActiveOpacityControl(true);

                if (opacityPercent == 100)

                        this.setActiveOpacityControl(false);

        }

        /**

         * Eventos sobre TextField y CheckBox. Controla eventos de checkbox de

         * opacidad, transparencia, recorte de colas y los textfield de opacidad,

         * valores de transparencia por banda y porcentaje de recorte.

         */

        public void actionPerformed(ActionEvent e) {

                // Evento sobre el checkbox de opacidad

                if (e.getSource().equals(getOpacityCheck())) {

                        // Check de opacidad activado -> Activar controles de opacidad

                        if (getOpacityCheck().isSelected()) {

                                getOpacitySlider().setEnabled(true);

                                getOpacityText().setEnabled(true);

                        } else {

                                getOpacitySlider().setEnabled(false);

                                getOpacityText().setEnabled(false);

                        }

                }

                //Evento sobre el textfield de opacidad

                if (e.getSource().equals(getOpacityText()))

                        checkOpacityText();

        }

        /*

         * (non-Javadoc)

         * @see java.awt.event.FocusListener#focusGained(java.awt.event.FocusEvent)

         */

        public void focusGained(FocusEvent e) {

//        pTrans.updateTextBox();

        }

        /*

         * (non-Javadoc)

         * @see java.awt.event.FocusListener#focusLost(java.awt.event.FocusEvent)

         */

        public void focusLost(FocusEvent e) {

                checkOpacityText();

        }

        /*

         * (non-Javadoc)

         * @see javax.swing.event.ChangeListener#stateChanged(javax.swing.event.ChangeEvent)

         */

        public void stateChanged(ChangeEvent e) {

                // Ponemos el valor del texto de la opacidad de pendiendo de la posici?n del

                // Slider

                if (e.getSource().equals(getOpacitySlider())) {

                        getOpacityText().setText(String.valueOf(getOpacitySlider().getValue()));

                }

        }

        /**

         * Controla que si el formato introducido en el textfield de opacidad es

         * numerico se actualiza la posici?n del slider. Si es numerico pero excede

         * del rango 0-100 pone el valor a 0 o a 100 dependiendo de si excede por

         * arriba o por abajo

         */

        private void checkOpacityText() {

                String op = getOpacityText().getText();

                int value = 0;

                try {

                        if (op == null)

                                throw new NumberFormatException();

                        value = Integer.parseInt(op);

                        if (value > 100)

                                getOpacityText().setText("100");

                        else

                                if (value < 0)

                                        getOpacityText().setText("0");

                        getOpacitySlider().setValue(value);

                } catch (NumberFormatException exc) {

                        getOpacityText().setText("100");

                        getOpacitySlider().setValue(100);

                }

        }

}