Application: gvSIG desktop

/**

 * gvSIG. Desktop Geographic Information System.

 *

 * Copyright (C) 2007-2013 gvSIG Association.

 *

 * 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 3 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.

 *

 * For any additional information, do not hesitate to contact us at info AT

 * gvsig.com, or visit our website www.gvsig.com.

 */

package org.gvsig.gui.beans.swing;

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;

import java.text.DecimalFormat;

import java.util.ArrayList;

import java.util.List;

import javax.swing.JFormattedTextField;

import javax.swing.JSpinner;

import javax.swing.SpinnerNumberModel;

import javax.swing.text.NumberFormatter;

import org.apache.commons.lang3.StringUtils;

import org.slf4j.Logger;

import org.slf4j.LoggerFactory;

public class JNumberSpinner extends JSpinner {

    private static final Logger logger = LoggerFactory.getLogger(JNumberSpinner.class);

    private boolean fireChanges;

    private List actionListeners = new ArrayList();

    public JNumberSpinner() {

        super(new SpinnerNumberModel());

        init(

                0.0,

                -1,

                Double.NEGATIVE_INFINITY,

                Double.MAX_VALUE,

                1.0,

                0

        );

    }

    public JNumberSpinner(int currentValue) {

        super(new SpinnerNumberModel());

        init(

                currentValue,

                -1,

                Integer.MIN_VALUE,

                Integer.MAX_VALUE,

                1.0,

                0

        );

    }

    public JNumberSpinner(int currentValue, int columns) {

        super(new SpinnerNumberModel());

        init(

                currentValue,

                columns,

                Integer.MIN_VALUE,

                Integer.MAX_VALUE,

                1,

                0

        );

    }

    public JNumberSpinner(int currentValue, int columns, int minValue, int maxValue, int step) {

        super(new SpinnerNumberModel());

        init(

                currentValue,

                columns,

                minValue,

                maxValue,

                step,

                0

        );

    }

    public JNumberSpinner(String currentValue, int columns, int minValue, int maxValue, int step) {

        super(new SpinnerNumberModel());

        Number value;

        if (StringUtils.isBlank(currentValue)) {

            value = null;

        } else {

            try {

                value = new Integer(Integer.parseInt(currentValue));

            } catch (Exception ex) {

                value = null;

            }

        }

        init(

                value == null ? 0 : value,

                columns,

                new Integer(minValue),

                new Integer(maxValue),

                new Integer(step),

                0

        );

        if (value == null) {

            JSpinner.NumberEditor editor = (JSpinner.NumberEditor) this.getEditor();

            JFormattedTextField textField = editor.getTextField();

            textField.setText("");

        }

    }

    public JNumberSpinner(int currentValue, int columns, int minValue, int maxValue, int step, int decimals) {

        super(new SpinnerNumberModel());

        init(

                new Integer(currentValue),

                columns,

                new Integer(minValue),

                new Integer(maxValue),

                new Integer(step),

                decimals

        );

    }

    public JNumberSpinner(double currentValue) {

        super(new SpinnerNumberModel());

        init(

                currentValue,

                -1,

                Double.NEGATIVE_INFINITY,

                Double.MAX_VALUE,

                1.0,

                4

        );

    }

    public JNumberSpinner(String currentValue, int columns, double minValue, double maxValue, double step) {

        this(

                currentValue,

                columns,

                minValue,

                maxValue,

                step,

                0

        );

    }

    public JNumberSpinner(String currentValue, int columns, double minValue, double maxValue, double step, int decimals) {

        super(new SpinnerNumberModel());

        Number value;

        if (StringUtils.isBlank(currentValue)) {

            value = null;

        } else {

            try {

                value = new Double(Double.parseDouble(currentValue));

            } catch (Exception ex) {

                value = null;

            }

        }

        init(

                value == null ? 0 : value,

                columns,

                new Double(minValue),

                new Double(maxValue),

                new Double(step),

                decimals

        );

        if (value == null) {

            JSpinner.NumberEditor editor = (JSpinner.NumberEditor) this.getEditor();

            JFormattedTextField textField = editor.getTextField();

            textField.setText("");

        }

    }

    public JNumberSpinner(double currentValue, int columns, double minValue, double maxValue, double step) {

        super(new SpinnerNumberModel());

        init(

                currentValue,

                columns,

                minValue,

                maxValue,

                step,

                4

        );

    }

    public JNumberSpinner(double currentValue, int columns, double minValue, double maxValue, double step, int decimals) {

        super(new SpinnerNumberModel());

        init(

                new Double(currentValue),

                columns,

                new Double(minValue),

                new Double(maxValue),

                new Double(step),

                decimals

        );

    }

    private void init(Number currentValue, int columns, Comparable minValue, Comparable maxValue, Number step, int decimals) {

        JSpinner.NumberEditor editor = (JSpinner.NumberEditor) this.getEditor();

        JFormattedTextField textField = editor.getTextField();

        NumberFormatter formatter = (NumberFormatter) textField.getFormatter();

        DecimalFormat format = editor.getFormat();

        SpinnerNumberModel model = getNumberModel();

        if (columns > 0) {

            textField.setColumns(columns);

        }

        model.setValue(currentValue);

        // Las siguientes lineas son un chapuza.

        //

        // Si meto un Double/double en setMaximun/setMinimun

        // No deja cambiar el valor asignado desde el UI.

        model.setMaximum(hackValue(maxValue));

        model.setMinimum(hackValue(minValue));

        // Como meta un double en setStepSize tampoco me deja

        // incrementar/decrementar el valor

        model.setStepSize((int)(Math.ceil(step.doubleValue())));

        //

        // Fin chapuza

        // dump();

        format.setMinimumFractionDigits(decimals);

        formatter.setAllowsInvalid(true);

        this.fireChanges = true;

    }

    private void dump() {

        SpinnerNumberModel model = getNumberModel();

        logger.info(

                "Current="+model.getValue()+" ("+model.getValue().getClass().getName()+"), "+

                "maxValue="+model.getMaximum()+" ("+model.getMaximum().getClass().getName()+"), "+

                "minValue="+model.getMinimum()+" ("+model.getMinimum().getClass().getName()+"),"+

                "step="+model.getStepSize()+" ("+model.getStepSize().getClass().getName()+")"

        );        

    }

    protected SpinnerNumberModel getNumberModel() {

        return (SpinnerNumberModel) this.getModel();

    }

    private Comparable hackValue(Comparable value) {

        if( !(value instanceof Double) ) {

            return value;

        }

        return ((Number)value).intValue();

    }

    public int getInteger() {

        return getNumberModel().getNumber().intValue();

    }

    public double getDouble() {

        return getNumberModel().getNumber().doubleValue();

    }

    public void setDouble(double v) {

        if (this.fireChanges) {

            this.fireChanges = false;

            try {

                setDouble(v);

            } finally {

                this.fireChanges = true;

            }

            return;

        }

        SpinnerNumberModel model = getNumberModel();

        model.setValue(v);

        dump();

    }

    public void setInteger(int v) {

        if (this.fireChanges) {

            this.fireChanges = false;

            try {

                setInteger(v);

            } finally {

                this.fireChanges = true;

            }

            return;

        }

        SpinnerNumberModel model = getNumberModel();

        model.setValue(v);

        dump();

    }

    public double getMaxValue() {

        Number n = (Number) getNumberModel().getMaximum();

        return n.doubleValue();

    }

    public void setMaxValue(double maxValue) {

        if (this.fireChanges) {

            this.fireChanges = false;

            try {

                setMaxValue(maxValue);

            } finally {

                this.fireChanges = true;

            }

            return;

        }

        SpinnerNumberModel model = getNumberModel();

        if (model.getValue() instanceof Double) {

            model.setMaximum(new Double(maxValue));

        } else {

            model.setMaximum(new Integer((int) maxValue));

        }

        dump();

    }

    public double getMinValue() {

        Number n = (Number) getNumberModel().getMinimum();

        return n.doubleValue();

    }

    public void setMinValue(double minValue) {

        if (this.fireChanges) {

            this.fireChanges = false;

            try {

                setMinValue(minValue);

            } finally {

                this.fireChanges = true;

            }

            return;

        }

        SpinnerNumberModel model = getNumberModel();

        if (model.getValue() instanceof Double) {

            model.setMinimum(new Double(minValue));

        } else {

            model.setMinimum(new Integer((int) minValue));

        }

        dump();

    }

    public double getStep() {

        Number n = (Number) getNumberModel().getStepSize();

        return n.doubleValue();

    }

    public void setStep(double step) {

        if (this.fireChanges) {

            this.fireChanges = false;

            try {

                setStep(step);

            } finally {

                this.fireChanges = true;

            }

            return;

        }

        SpinnerNumberModel model = getNumberModel();

        if (model.getValue() instanceof Double) {

            model.setStepSize(new Double(step));

        } else {

            model.setStepSize(new Integer((int) step));

        }

        dump();

    }

    public void addActionListener(final ActionListener listener) {

        // Me guardo los ActionListeners a parte y no los registro 

        // directamente en el spinner ya que el cliente de JnumberSpiner 

        // espera que solo se invoque a estos listeners por eventos

        // provocados desde el GUI y no por asignar valores a las

        // propiedades del JNumberSpinner

        this.actionListeners.add(listener);

    }

    @Override

    protected void fireStateChanged() {

        // Disparo los evento normales

        super.fireStateChanged();

        if( this.fireChanges ) {

            // Si los cambios no son producidos por asignacion a las propiedades

            // del JNumberSpinner disparo los actionlistener que haya registrados.

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

                ActionListener listener = (ActionListener) this.actionListeners.get(i);

                listener.actionPerformed(new ActionEvent(this, -1, null));

            }

        }

    }

}