FunctionPresetDialog.java

/*
 * This file is part of the OSMembrane project.
 * More informations under www.osmembrane.de
 * 
 * The project is licensed under the GNU GENERAL PUBLIC LICENSE 3.0.
 * for more details about the license see http://www.osmembrane.de/license/
 * 
 * Source: $HeadURL$ ($Revision$)
 * Last changed: $Date$
 */

package de.osmembrane.view.dialogs;

import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.GridLayout;
import java.awt.Insets;
import java.awt.Window;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.DefaultComboBoxModel;
import javax.swing.JButton;
import javax.swing.JComboBox;
import javax.swing.JPanel;

import de.osmembrane.model.settings.AbstractFunctionPreset;
import de.osmembrane.tools.I18N;
import de.osmembrane.view.AbstractDialog;
import de.osmembrane.view.interfaces.IFunctionPresetDialog;

/**
 * Displays a dialog to select the correct FunctionPreset to load.
 * 
 * @author tobias_kuhn
 * 
 */
public class FunctionPresetDialog extends AbstractDialog implements
        IFunctionPresetDialog {

    private static final long serialVersionUID = -1165660042954662085L;

    /**
     * Internal enum to keep track of the selection.
     * 
     * @author tobias_kuhn
     * 
     */
    enum ButtonSelection {
        NONE, LOAD, DELETE
    };

    /**
     * Keeps track of the last selection.
     */
    private ButtonSelection selectedButton;

    /**
     * The combo box to select the preset
     */
    private JComboBox selection;

    /**
     * The presets to select from
     */
    private AbstractFunctionPreset[] presets;

    /**
     * Buttons for loading & deleting
     */
    private JButton loadButton;
    private JButton deleteButton;

    /**
     * Creates a new {@link FunctionPresetDialog}.
     */
    public FunctionPresetDialog(Window owner) {
        super(owner);
        setLayout(new GridBagLayout());
        GridBagConstraints gbc = new GridBagConstraints();
        gbc.insets = new Insets(8, 8, 8, 8);

        gbc.gridx = 0;
        gbc.gridy = 0;
        gbc.fill = GridBagConstraints.HORIZONTAL;
        selection = new JComboBox();
        selection.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                loadButton.setEnabled(selection.getSelectedIndex() >= 0);
                deleteButton.setEnabled(selection.getSelectedIndex() >= 0);
            }
        });
        add(selection, gbc);

        gbc.gridx = 0;
        gbc.gridy = 1;
        gbc.fill = GridBagConstraints.NONE;
        JPanel buttonGrid = new JPanel(new GridLayout(1, 3));

        loadButton = new JButton(I18N.getInstance().getString("View.Load"));
        loadButton.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                selectedButton = ButtonSelection.LOAD;
                hideWindow();
            }
        });
        buttonGrid.add(loadButton);

        deleteButton = new JButton(I18N.getInstance().getString("View.Delete"));
        deleteButton.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                selectedButton = ButtonSelection.DELETE;
                hideWindow();
            }
        });
        buttonGrid.add(deleteButton);

        JButton cancelButton = new JButton(I18N.getInstance().getString(
                "View.Cancel"));
        cancelButton.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                selectedButton = ButtonSelection.NONE;
                hideWindow();
            }
        });
        buttonGrid.add(cancelButton);

        add(buttonGrid, gbc);

        selectedButton = ButtonSelection.NONE;
        setTitle(I18N.getInstance().getString("View.FunctionPresetDialog"));

        pack();
        centerWindow();
    }

    @Override
    public void open(AbstractFunctionPreset[] presets) {
        this.presets = presets;

        String[] selectables = new String[presets.length];
        for (int i = 0; i < presets.length; i++) {
            selectables[i] = presets[i].getName();
        }

        selection.setModel(new DefaultComboBoxModel(selectables));

        loadButton.setEnabled(selection.getSelectedIndex() >= 0);
        deleteButton.setEnabled(selection.getSelectedIndex() >= 0);
        selectedButton = ButtonSelection.NONE;
        showWindow();
    }

    @Override
    public AbstractFunctionPreset getSelectedPreset() {
        if (selection.getSelectedIndex() < 0) {
            return null;
        } else {
            return presets[selection.getSelectedIndex()];
        }
    }

    @Override
    public boolean loadSelected() {
        return selectedButton.equals(ButtonSelection.LOAD);
    }

    @Override
    public boolean deleteSelected() {
        return selectedButton.equals(ButtonSelection.DELETE);
    }

}