CFPythonPopup.java

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/*
 * Gridarta MMORPG map editor for Crossfire, Daimonin and similar games.
 * Copyright (C) 2000-2015 The Gridarta Developers.
 *
 * 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.
 *
 * 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.
 *
 * 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.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 */

package net.sf.gridarta.textedit.scripteditor;

import java.awt.Color;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JComboBox;
import javax.swing.JPopupMenu;
import javax.swing.text.BadLocationException;
import net.sf.gridarta.textedit.textarea.JEditTextArea;
import org.apache.log4j.Category;
import org.apache.log4j.Logger;
import org.jetbrains.annotations.NotNull;

public class CFPythonPopup extends JComboBox<Object> {

    @NotNull
    private static final Category LOG = Logger.getLogger(CFPythonPopup.class);

    private static final long serialVersionUID = 1L;

    @NotNull
    private final JPopupMenu menu;

    private final boolean isReady;

    private int caretPos;

    public CFPythonPopup(@NotNull final ScriptEditControl scriptEditControl, @NotNull final MenuEntries menuEntries) {
        setBackground(Color.white); // white background

        menu = new CFPythonPopupMenu(this);

        for (final String menuEntry : menuEntries) {
            addItem(" " + menuEntry);
        }

        // listener for selection events
        addActionListener(new MenuActionListener(this, scriptEditControl));

        isReady = !menuEntries.isEmpty();

        setRequestFocusEnabled(true);
    }

    public boolean isInitialized() {
        return isReady;
    }

    public void setCaretPosition(final int pos) {
        caretPos = pos;
        menu.requestFocus();
        ScriptEditControl.registerActivePopup(this);
    }

    @NotNull
    public JPopupMenu getMenu() {
        return menu;
    }

    private class MenuActionListener implements ActionListener {

        @NotNull
        private final ScriptEditControl control;

        @NotNull
        private final CFPythonPopup popup;

        private boolean ignore; // while true, all ActionEvents get ignored

        private MenuActionListener(@NotNull final CFPythonPopup popup, @NotNull final ScriptEditControl control) {
            this.popup = popup;
            this.control = control;
        }

        @Override
        public void actionPerformed(@NotNull final ActionEvent e) {
            if (!ignore) {
                // get method name to insert
                String method = popup.getSelectedItem().toString();
                method = method.substring(0, method.indexOf('(')).trim() + "()";

                final JEditTextArea activeTextArea = control.getActiveTextArea();
                if (activeTextArea != null) {
                    try {
                        // insert method into the document
                        activeTextArea.getDocument().insertString(caretPos, method, null);
                    } catch (final BadLocationException ex) {
                        LOG.error("BadLocationException", ex);
                    }
                }

                ignore = true;
                popup.setSelectedIndex(0);
                ignore = false;
                popup.getMenu().setVisible(false); // in some JRE versions, this doesn't happen automatically
            }
        }

    }

}