source: main/trunk/greenstone3/src/java/org/greenstone/admin/guiext/PropertiesStep.java@ 22085

package org.greenstone.admin.guiext;

import javax.swing.BorderFactory;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JFrame;
import javax.swing.JButton;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.SwingConstants;

import javax.swing.table.AbstractTableModel;
import javax.swing.table.TableCellEditor;

import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
import java.awt.event.KeyListener;
import java.awt.event.KeyEvent;

import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Font;
import java.awt.GridLayout;

import java.util.Properties;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;

import org.w3c.dom.Element;

import org.greenstone.util.Configuration;
import org.greenstone.admin.LoggedMessageArea;

public class PropertiesStep extends Step
{
    OptionList[] _optionLists = null;
    JTable[] _tables = null;
    OptionList[] _modifiedOptionLists = null;

    public PropertiesStep(Element propertiesStepElement, SequenceList parent)
    {
    super(propertiesStepElement, parent);
    
    if(propertiesStepElement != null){
        ExtensionInformation info = _parent.getParent();

        Element[] optionListElements = ExtXMLHelper.getMultipleChildElements(propertiesStepElement, ExtXMLHelper.OPTION_LIST, true);

        if(optionListElements != null){
        
        _optionLists = new OptionList[optionListElements.length];
        _modifiedOptionLists = new OptionList[optionListElements.length];

        for(int i = 0; i < optionListElements.length; i++){
            _optionLists[i] = new OptionList(optionListElements[i], this, false);
            _modifiedOptionLists[i] = new OptionList(optionListElements[i], this, true);
        }
        }
        else{
        System.err.println("This properties <" + ExtXMLHelper.STEP + "> element has no <" + ExtXMLHelper.OPTION_LIST + "> elements");
        }
    }
    else{
        System.err.println("This properties <" + ExtXMLHelper.STEP + "> element is null" );
    }
    
    _button.addActionListener(new PropertiesButtonListener());
    }

    public void setPropertiesToDefaults()
    {
    for(int i = 0; i < _optionLists.length; i++){
        Option[] _modifiedOptions = _modifiedOptionLists[i].getOptions();
        Option[] _defaultOptions = _optionLists[i].getOptions();
        
        for(int j = 0; j < _defaultOptions.length; j++){
        _modifiedOptions[j].setValue(_defaultOptions[j].getValue());
        }
    }
    }

    public class PropertiesButtonListener implements ActionListener
    {
    public void actionPerformed(ActionEvent e)
    {
        ExtensionInformation extension = _parent.getParent();
        
        String fileStem = extension.getFileStem();
        
        JPanel mainPanel = new JPanel();
        mainPanel.setBorder(BorderFactory.createLoweredBevelBorder());
        mainPanel.setBackground(Configuration.getColor("coloring.workspace_selection_background"));
        mainPanel.setForeground(Configuration.getColor("coloring.workspace_selection_foreground"));
        mainPanel.setLayout(new BorderLayout());
        
        JPanel tablePanel = new JPanel(new GridLayout(_optionLists.length, 1));
        
        if(_tables == null){
        _tables = new JTable[_optionLists.length];
        }
        for(int i = 0; i < _optionLists.length; i++){
        OptionList currentList = _modifiedOptionLists[i];
        
        JLabel singleTableLabel = new JLabel(currentList.getLabel()); 
        singleTableLabel.setHorizontalAlignment(SwingConstants.CENTER);
        singleTableLabel.setFont(new Font("Arial", Font.BOLD, 13));

        JPanel singleTablePanel = new JPanel();
        singleTablePanel.setLayout(new BorderLayout());
        singleTablePanel.add(singleTableLabel, BorderLayout.NORTH);
        
        Option[] options = currentList.getOptions();        

        JTable propertiesTable = new JTable(new CustomTableModel(new String[]{"Setting", "Value"}, options));
        //The line below is necessary as the default grid colour on mac is white, which makes the lines invisible.
        propertiesTable.setGridColor(Color.BLACK);

        if(_tables[i] == null){
            _tables[i] = propertiesTable;
        }

        //The line below is a workaround for a bug in the JTable class that does not store properties if focus is given to another component.
        propertiesTable.putClientProperty("terminateEditOnFocusLost", Boolean.TRUE);

        singleTablePanel.add(propertiesTable, BorderLayout.CENTER);
        
        tablePanel.add(singleTablePanel);
        }

        JButton defaultsButton = new JButton("Restore default settings");
        defaultsButton.addActionListener(new DefaultSettingsButtonListener());
        
        JButton saveButton = new JButton("Save");
        saveButton.addActionListener(new SaveButtonListener());
        
        JPanel buttonPanel = new JPanel();
        buttonPanel.setLayout(new GridLayout(1, 2));
        buttonPanel.add(saveButton);
        buttonPanel.add(defaultsButton);
        
        mainPanel.setBorder(BorderFactory.createEmptyBorder(10,20,10,20));
        mainPanel.setBackground(Configuration.getColor("coloring.workspace_selection_background"));
        mainPanel.setForeground(Configuration.getColor("coloring.workspace_selection_foreground"));
        mainPanel.add(tablePanel, BorderLayout.CENTER);
        mainPanel.add(buttonPanel, BorderLayout.SOUTH);
        
        _parent.getParent().changeExtPane(mainPanel);
    }
    }
    
    public class SaveButtonListener implements ActionListener
    {
    public void actionPerformed(ActionEvent e)
    {
        for(int i = 0; i < _optionLists.length; i++){
        OptionList currentOptionList = _modifiedOptionLists[i];
        Option[] currentOptions = currentOptionList.getOptions();

        Properties newProperties = new Properties();
        File propertiesFile = null;
        if(currentOptionList.getFilename().equals("")){
            propertiesFile = new File(_parent.getParent().getExtensionDirectory() + System.getProperty("file.separator") + "build.properties");
        }
        else{
            propertiesFile = new File(_parent.getParent().getExtensionDirectory() + System.getProperty("file.separator") + currentOptionList.getFilename());
        }

        if(propertiesFile.exists()){
            try{
            newProperties.load(new FileInputStream(propertiesFile));
            }
            catch(Exception ex){
            System.err.println("Could not load properties file before saving to it, existing values will be removed. Possible reasons for this include: \n - Invalid properties file format\n - File is write protected");
            }
        }

        for(int j = 0; j < currentOptions.length; j++){
            Option currentOption = currentOptions[j];
            if(currentOptionList.getId().equals("")){
            newProperties.setProperty(currentOption.getId(), currentOption.getValue());
            }
            else{
            newProperties.setProperty(currentOptionList.getId() + "." + currentOption.getId(), currentOption.getValue());
            }
        }

        try{
            if(currentOptionList.getFilename().equals("")){
            newProperties.store(new FileOutputStream(_parent.getParent().getExtensionDirectory() + System.getProperty("file.separator") + "build.properties"), null);
            }
            else{
            newProperties.store(new FileOutputStream(_parent.getParent().getExtensionDirectory() + System.getProperty("file.separator") + currentOptionList.getFilename()), null);
            }
        }
        catch(Exception ex){
            System.err.println("Could not save to properties file.");
        }
        }

        _parent.registerStepCompletion(PropertiesStep.this);
    }
    }

    public class DefaultSettingsButtonListener implements ActionListener
    {
    public void actionPerformed(ActionEvent e)
    {
        for(int i = 0; i < _tables.length; i++){
        JTable currentTable = _tables[i]; 
        Option[] currentDefaultOptions = _optionLists[i].getOptions();

        for(int j = 0; j < currentDefaultOptions.length; j++){
            Option currentOption = currentDefaultOptions[j];
            currentTable.setValueAt(currentOption.getValue(), j, 1);
        }
        
        currentTable.revalidate();
        currentTable.repaint();
        }
    }
    }

    public class CustomTableModel extends AbstractTableModel
    {
    private String[] _columnNames;
        private Option[] _data;
    
        public CustomTableModel(String[] columnNames, Option[] data){
        _columnNames = columnNames;
        _data = data;
        }
    
        public int getColumnCount() {
            return _columnNames.length;
        }
    
        public int getRowCount() {
            return _data.length;
        }

        public String getColumnName(int col) {
            return _columnNames[col];
        }

        public Object getValueAt(int row, int col) {
        Option o = _data[row];
        if(col == 0){
        return o.getName();
        }
        else if(col == 1){
        return o.getValue();
        }
            else{
        return null;
        }
        }


        public Class getColumnClass(int c) {
            return getValueAt(0, c).getClass();
        }

    public boolean isCellEditable(int row, int col) {
        if (col < 1) {
                return false;
            } else {
                return true;
            }
        }
    
        public void setValueAt(Object value, int row, int col) {
        if(isCellEditable(row, col)){
        _data[row].setValue((String)value);
        }
        fireTableDataChanged();
        }
    }
}