/*

 * Title: japlot.jaxodraw
 * Description: Graphical user interface for drawing Feynman diagrams
 * @author Daniele Binosi 
 * @author Lukas Theussl  

 Copyright (C) 2003-2006,  Daniele Binosi and Lukas Theussl

 See the file LICENSE in the source distribution home directory
 for a full copy of the GPL (GNU General Public License).

    This file is part of japlot.jaxodraw.

    japlot.jaxodraw 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.

    japlot.jaxodraw 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 japlot.jaxodraw;

import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import java.util.ResourceBundle;

import javax.swing.BorderFactory;
import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JPanel;
import javax.swing.border.Border;
import javax.swing.border.EtchedBorder;


/** Responsible for displaying and modifying the buttons of the action
 * button menu.
 */
public class JaxoActionButtons extends JPanel implements ActionListener {
    private static final String[] ACTION_BUTTON_ICONS =
    {"japlot/jaxodraw/icons/undo.png", "japlot/jaxodraw/icons/clear.png", "japlot/jaxodraw/icons/refresh.png"};
    private JaxoMainPanel thePanel;
    private ResourceBundle language =
        ResourceBundle.getBundle(JaxoPrefs.getPref(JaxoPrefs.PREF_LANGUAGE));
    private int anbts = 3;
    private JButton[] actionButtons = new JButton[anbts];
    private String[] actionTips =
    {
        language.getString("Undo_the_last_operation"),
        language.getString("Clear_the_screen"),
        language.getString("Refresh_the_Screen")
    };
    private Border raisedetched =
        BorderFactory.createEtchedBorder(EtchedBorder.RAISED);

    //private Border loweredetched =
    //    BorderFactory.createEtchedBorder(EtchedBorder.LOWERED);
    private Border raisedbevel = BorderFactory.createRaisedBevelBorder();

    /** Constructor: lays out the action button panel.
     * @param mainPanel The JaxoMainPanel that holds this button panel.
     */
    public JaxoActionButtons(JaxoMainPanel mainPanel) {
        this.thePanel = mainPanel;

        JPanel actionButtonPanel = new JPanel();

        GridBagLayout gridbag = new GridBagLayout();
        GridBagConstraints c = new GridBagConstraints();

        actionButtonPanel.setLayout(gridbag);

        for (int i = 0; i < anbts; i++) {
            actionButtons[i] = new JButton();
            actionButtons[i].setIcon(new ImageIcon(JaxoActionButtons.class.getClassLoader()
                                                                          .getResource(ACTION_BUTTON_ICONS[i])));
            actionButtons[i].setToolTipText(actionTips[i]);
            actionButtons[i].addActionListener(this);
            actionButtons[i].setMinimumSize(new Dimension(40, 40));
            actionButtons[i].setPreferredSize(new Dimension(40, 40));
            actionButtons[i].setBorder(raisedbevel);
            actionButtons[i].setFocusPainted(false);
        }

        for (int j = 0; j < 1; j++) {
            for (int i = 0; i < 3; i++) {
                c.gridx = i;
                c.gridy = j;
                gridbag.setConstraints(actionButtons[i + (3 * j)], c);
                actionButtonPanel.add(actionButtons[i + (3 * j)]);
            }
        }

        JPanel finalActionButtonPanel = new JPanel();
        finalActionButtonPanel.setLayout(new BorderLayout());
        finalActionButtonPanel.setBorder(raisedetched);
        finalActionButtonPanel.add(actionButtonPanel, BorderLayout.CENTER);

        setLayout(new GridLayout(0, 1));
        add(finalActionButtonPanel);
    }

    /** Executes the appropriate action when a button is pressed.
     * @param evt the action event to be processed.
     */
    public final void actionPerformed(ActionEvent evt) {
        for (int i = 0; i < anbts; i++) {
            if (evt.getSource() == actionButtons[i]) {
                thePanel.actionEvent(getActionEvent(i));
            }
        }
    }

    /** Sets all the buttons as not pressed. */
    public final void reset() {
        for (int i = 0; i < anbts; i++) {
            setButtonBorder(i, raisedbevel);
            setButtonBackground(i, null);
        }
    }

    /** Returns the number of buttons in the action button menu.
     * @return The number of buttons in the action button menu.
     */
    public final int getanbts() {
        return anbts;
    }

    /** Sets the background color of button i to the color bgColor.
     * @param i The index of the botton, whose background color is to be set.
     * @param bgColor The color to be set.
     */
    public final void setButtonBackground(int i, Color bgColor) {
        actionButtons[i].setBackground(bgColor);
    }

    /** Sets the border of the button with index i to the specified border.
     * @param i The index of the botton, whose border is to be set.
     * @param border The border to be set.
     */
    public final void setButtonBorder(int i, Border border) {
        actionButtons[i].setBorder(border);
    }

    /** Sets the tool tip text for the action buttons in different languages.
     * @param languageString A string specifying the language to be set.
     */
    public final void setLanguage(String languageString) {
        language = ResourceBundle.getBundle(languageString);

        actionTips[0] = language.getString("Undo_the_last_operation");
        actionTips[1] = language.getString("Clear_the_screen");
        actionTips[2] = language.getString("Refresh_the_Screen");

        for (int i = 0; i < anbts; i++) {
            actionButtons[i].setToolTipText(actionTips[i]);
        }
    }

    /** Returns the index of the corresponding event in the JaxoMainPanel for
     * the toolbar button i.
     * @param i The button whose index is to be returned.
     * @return The index of the button i.
     */
    public final int getActionEvent(int i) {
        int actionEvent = anbts + 1;

        if (i == 0) {
            actionEvent = JaxoMainPanel.UNDO;
        }

        if (i == 1) {
            actionEvent = JaxoMainPanel.CLEAR;
        }

        if (i == 2) {
            actionEvent = JaxoMainPanel.REFRESH;
        }

        return actionEvent;
    }
}