Application: gvSIG desktop

package org.gvsig.gui.beans.openfile;

import java.awt.GridBagConstraints;

import java.awt.GridBagLayout;

import java.awt.Insets;

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;

import java.awt.event.FocusEvent;

import java.awt.event.FocusListener;

import java.io.File;

import java.util.ArrayList;

import javax.swing.JButton;

import javax.swing.JPanel;

import javax.swing.JTextField;

import org.gvsig.gui.beans.Messages;

import org.gvsig.gui.beans.swing.JFileChooser;

public class FileTextField extends JPanel {

        private static final long serialVersionUID = 1L;

        private JTextField tf_fileName = null;

        private JButton bt_chooseFile = null;

        private File selectedFile = null;

        private ArrayList enabledListeners = new ArrayList();

        private JFileChooser jfc;

        /**

         * Used to create file choosers with 'memory'

         */

        private String JFC_ID = null;

        public static final int ACTION_EVENT_FIELD_DISABLED = 0;

        public static final int ACTION_EVENT_FIELD_ENABLED = 1;

        public static final int ACTION_EVENT_VALUE_CHANGED = 1;

        public FileTextField() {

                super();

                JFC_ID = this.getClass().getName();

                initializeUI();

        }

        public FileTextField(String id) {

                super();

                JFC_ID = id;

                initializeUI();

        }

        private void initializeUI() {

                 jfc = new JFileChooser(JFC_ID, (String) null);

                setLayout(new GridBagLayout());

                GridBagConstraints constraints = new GridBagConstraints();

                constraints.gridx = 0;

                constraints.gridy = 0;

                constraints.gridwidth = 1;

                constraints.gridheight = 1;

                constraints.fill = GridBagConstraints.BOTH;

                constraints.anchor = GridBagConstraints.WEST;

                constraints.weightx = 1.0;

                constraints.weighty = 1.0;

                constraints.insets = new Insets(0,0,0,4);

                this.add(getNameField(), constraints);

                getChooseFileButton().addActionListener(new ActionListener() {

                        public void actionPerformed(ActionEvent e) {

                                if (e.getSource()==getChooseFileButton()) {

                                        int action = jfc.showDialog(FileTextField.this, Messages.getText("Open"));

                                        if (action == JFileChooser.APPROVE_OPTION) {

                                                setSelectedFile(jfc.getSelectedFile());

                                                setEnabled(true);

                                        }

                                }

                        }

                });

                constraints.gridx = 1;

                constraints.gridy = 0;

                constraints.gridwidth = 1;

                constraints.gridheight = 1;

                constraints.fill = GridBagConstraints.BOTH;

                constraints.anchor = GridBagConstraints.WEST;

                constraints.weightx = 0.0;

                constraints.weighty = 1.0;

                constraints.insets = new Insets(0,0,0,0);

                this.add(getChooseFileButton(), constraints);

        }

        private JTextField getNameField() {

                if (tf_fileName==null) {

                        tf_fileName = new JTextField();

                        tf_fileName.addFocusListener(new FocusListener() {

                                public void focusGained(FocusEvent e) {}

                                public void focusLost(FocusEvent e) {

                                        updateSelectedFile();

                                }

                        });

                }

                return tf_fileName;

        }

        private JButton getChooseFileButton() {

                if (bt_chooseFile==null) {

                        bt_chooseFile = new JButton("...");

                }

                return bt_chooseFile;

        }

        public void setSelectedFile(File file) {

                File oldFile = selectedFile;

                selectedFile = normalizeExtension(file);

                getNameField().setText(selectedFile.toString());

                if (file.isDirectory()) {

                        jfc.setLastPath(file);

                }

                else {

                    jfc.setSelectedFile(file);

            jfc.setLastPath(file.getParentFile());

                }

                fireValueChanged(oldFile, file);

        }

        public File getSelectedFile() {

                return updateSelectedFile();

        }

        private File normalizeExtension(File file) {

                javax.swing.filechooser.FileFilter filter = (javax.swing.filechooser.FileFilter) jfc.getFileFilter();

                if (!filter.accept(file)) {

                        String path = file.getPath();

                        if (filter instanceof FileFilter)  {

                                FileFilter ourFilter = (FileFilter) filter;

                        if (path.endsWith(".")) {

                                path = path+ourFilter.getDefaultExtension();

                        }

                        else {

                                path = path+"."+ourFilter.getDefaultExtension();

                        }

                        file = new File(path);

                        }

                }

                return file;

        }

        private File updateSelectedFile() {

                File oldFile = selectedFile;

                String text = getNameField().getText();

                if ( (oldFile!=null && !oldFile.getPath().equals(text))

                                || ((oldFile==null) && !text.equals(""))){

                        File newFile = normalizeExtension(new File(getNameField().getText()));

                        selectedFile = newFile;

                        fireValueChanged(oldFile, newFile);

                }

                return selectedFile;

        }

        protected void fireValueChanged(File oldValue, File newValue) {

                firePropertyChange("selectedFileChanged", oldValue, newValue);

        }

        protected void fireEnabledChanged(boolean oldValue, boolean newValue) {

                firePropertyChange("enabled", oldValue, newValue);

        }

        public void setEnabled(boolean enabled) {

                boolean oldValue = isEnabled();

                super.setEnabled(enabled);

                getNameField().setEnabled(enabled);

                fireEnabledChanged(oldValue, enabled);

        }

        public javax.swing.filechooser.FileFilter getFileFilter() {

                return jfc.getFileFilter();

        }

        public int getFileSelectionMode() {

                return jfc.getFileSelectionMode();

        }

        public boolean removeChoosableFileFilter(FileFilter f) {

                return jfc.removeChoosableFileFilter(f);

        }

        public void setFileFilter(FileFilter filter) {

                jfc.setFileFilter(filter);

        }

        public void addChoosableFileFilter(FileFilter filter) {

                jfc.addChoosableFileFilter(filter);

        }

        public FileFilter getAcceptAllFileFilter() {

                return (FileFilter) jfc.getAcceptAllFileFilter();

        }

        public boolean isAcceptAllFileFilterUsed() {

                return jfc.isAcceptAllFileFilterUsed();

        }

        public void resetChoosableFileFilters() {

                jfc.resetChoosableFileFilters();

        }

        public void setAcceptAllFileFilterUsed(boolean b) {

                jfc.setAcceptAllFileFilterUsed(b);

        }

}