source: trunk/gli/src/org/greenstone/gatherer/gui/NewMetaSetPrompt.java@ 8257

/**
 *#########################################################################
 *
 * A component of the Gatherer application, part of the Greenstone digital
 * library suite from the New Zealand Digital Library Project at the
 * University of Waikato, New Zealand.
 *
 * <BR><BR>
 *
 * Author: Katherine Don, Greenstone Digital Library, University of Waikato
 *
 * <BR><BR>
 *
 * Copyright (C) 1999 New Zealand Digital Library Project
 *
 * <BR><BR>
 *
 * 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.
 *
 * <BR><BR>
 *
 * 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.
 *
 * <BR><BR>
 *
 * 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., 675 Mass Ave, Cambridge, MA 02139, USA.
 *########################################################################
 */
package org.greenstone.gatherer.gui;


import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.event.*;
import javax.swing.text.*;
import org.greenstone.gatherer.Configuration;
import org.greenstone.gatherer.Dictionary;
import org.greenstone.gatherer.Gatherer;

/** this class is pretty much copied from an inner class of MEM - AddSetActionListener. At some stage the two should be merged so there is only one copy of the code. */
public class NewMetaSetPrompt
    extends ModalDialog {
    
    private boolean cancelled = true;
    private JTextField name_field = null;
    private JTextField namespace_field = null;
    private JDialog self;
    
    static private Dimension size = new Dimension(400,125);
    static final private Dimension LABEL_SIZE = new Dimension(100,30);
    static final private Dimension ADD_SET_SIZE = new Dimension(400,125);
   
    public NewMetaSetPrompt() {
    super(Gatherer.g_man, true);
    this.self = this;
    setModal(true);
    setSize(size);
    Dictionary.setText(this, "MEM.AddSet");
    
    // Creation
    JPanel content_pane = (JPanel) getContentPane();
    content_pane.setBackground(Configuration.getColor("coloring.collection_heading_background", false));
    JPanel center_pane = new JPanel();
    center_pane.setOpaque(false);

    JPanel name_pane = new JPanel();
    name_pane.setOpaque(false);
    JLabel name_label = new JLabel();
    name_label.setOpaque(false);
    name_label.setPreferredSize(LABEL_SIZE);
    Dictionary.setText(name_label, "MEM.Name");
    name_field = new JTextField();
    name_field.setBackground(Configuration.getColor("coloring.collection_tree_background", false));
    name_field.setForeground(Configuration.getColor("coloring.collection_tree_foreground", false));
    name_field.setSelectionColor(Configuration.getColor("coloring.collection_selection_background", false));
    name_field.setSelectedTextColor(Configuration.getColor("coloring.collection_selection_foreground", false));
    Dictionary.setTooltip(name_field, "MEM.Set_Name_Tooltip");
    
    JPanel namespace_pane = new JPanel();
    namespace_pane.setOpaque(false);
    JLabel namespace_label = new JLabel();
    namespace_label.setOpaque(false);
    namespace_label.setPreferredSize(LABEL_SIZE);
    Dictionary.setText(namespace_label, "MEM.Namespace");
    namespace_field = new JTextField();
    namespace_field.setBackground(Configuration.getColor("coloring.collection_tree_background", false));
    namespace_field.setForeground(Configuration.getColor("coloring.collection_tree_foreground", false));
    namespace_field.setSelectionColor(Configuration.getColor("coloring.collection_selection_background", false));
    namespace_field.setSelectedTextColor(Configuration.getColor("coloring.collection_selection_foreground", false));
    Dictionary.setTooltip(namespace_field, "MEM.Set_Namespace_Tooltip");


    JPanel button_pane = new JPanel();
    button_pane.setOpaque(false);
    
    JButton ok_button = new GLIButton();
    ok_button.setMnemonic(KeyEvent.VK_O);
    Dictionary.setBoth(ok_button, "General.OK", "General.OK_Tooltip");
    ok_button.setEnabled(false);
    JButton cancel_button = new GLIButton();
    cancel_button.setMnemonic(KeyEvent.VK_C);
    Dictionary.setBoth(cancel_button, "General.Cancel", "General.Pure_Cancel_Tooltip");
    TextFieldEnabler ok_button_enabler = new TextFieldEnabler(ok_button);

    // Connection
    cancel_button.addActionListener(new OKButtonListener());
    ok_button.addActionListener(new CancelButtonListener());
    ok_button_enabler.add(name_field);
    ok_button_enabler.add(namespace_field);

    // Layout
    namespace_pane.setBorder(BorderFactory.createEmptyBorder(0,0,5,0));
    namespace_pane.setLayout(new BorderLayout());
    namespace_pane.add(namespace_label, BorderLayout.WEST);
    namespace_pane.add(namespace_field, BorderLayout.CENTER);
    
    name_pane.setBorder(BorderFactory.createEmptyBorder(0,0,5,0));
    name_pane.setLayout(new BorderLayout());
    name_pane.add(name_label, BorderLayout.WEST);
    name_pane.add(name_field, BorderLayout.CENTER);
    
    center_pane.setLayout(new GridLayout(2,1));
    center_pane.add(name_pane);
    center_pane.add(namespace_pane);
    
    button_pane.setLayout(new GridLayout(1,2,0,5));
    button_pane.add(ok_button);
    button_pane.add(cancel_button);
    
    content_pane.setBorder(BorderFactory.createEmptyBorder(5,5,5,5));
    content_pane.setLayout(new BorderLayout());
    content_pane.add(center_pane, BorderLayout.CENTER);
    content_pane.add(button_pane, BorderLayout.SOUTH);
    
    setLocation((Configuration.screen_size.width - ADD_SET_SIZE.width) / 2, (Configuration.screen_size.height - ADD_SET_SIZE.height) / 2);
    setVisible(true);
    }

    public boolean isCancelled() {
    return cancelled;
    }
    
    public String getNamespace() {
    return namespace_field.getText();
    }

    public String getName() {
    return name_field.getText();
    }
    
    private class CancelButtonListener
    implements ActionListener {
    public void actionPerformed(ActionEvent event) {
        cancelled = true;
        self.dispose();
    }
    }
    public class OKButtonListener
    implements ActionListener {
    public void actionPerformed(ActionEvent event) {
        cancelled = false;
        self.dispose();
    }
    }
    
    /** Used to enable a certain target component if and only if all the registered text fields contain non-zero length strings. */
    private class TextFieldEnabler
    implements DocumentListener {
    private boolean ignore = false;
    private Component target = null;
    private JTextComponent[] fields = null;
    public TextFieldEnabler(Component target) {
        super();
        this.target = target;
    }
    public void add(JTextComponent field) {
        // Record this field as being one we depend upon
        if(fields == null) {
        fields = new JTextComponent[1];
        fields[0] = field;
        }
        else {
        JTextComponent[] temp = new JTextComponent[fields.length + 1];
        System.arraycopy(fields, 0, temp, 0, fields.length);
        temp[fields.length] = field;
        fields = temp;
        temp = null;
        }
        // Add the appropriate listener
        field.getDocument().addDocumentListener(this);
    }
    /** Gives notification that an attribute or set of attributes changed. */
    public void changedUpdate(DocumentEvent e) {
        canEnable();
    }
    /** Gives notification that there was an insert into the document. */
    public void insertUpdate(DocumentEvent e) {
        canEnable();
    }
        /** Gives notification that a portion of the document has been removed. */
    public void removeUpdate(DocumentEvent e) {
        canEnable();
    }
    private void canEnable() {
        if(!ignore) {
        ignore = true;
        boolean can_enable = true;
        for(int i = 0; can_enable && i < fields.length; i++) {
            can_enable = can_enable && (fields[i].getText().length() > 0);
        }
        target.setEnabled(can_enable);
        ignore = false;
        }
    }
    }
}