jtextviewer.java

JavaExplorer是一个独立于平台的浏览器

/**
  * XFile and FTP Explorer
  * Copyright 2002
  * BOESCH Vincent
  *
  * 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., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  */
package javaexplorer.gui.viewer;

import java.awt.*;

//import java.io.*;

import javaexplorer.Launcher;

import javaexplorer.gui.listener.ViewerListener;

import javaexplorer.model.XFile;

import javaexplorer.util.ExplorerUtil;

import javax.swing.*;


public class JTextViewer extends JScrollPane implements Viewer {
    private Font _defaultFont = new Font("Arial", Font.PLAIN, 10);
    private XFile _xfile = null;
    private JTextArea _jtaText = new JTextArea();
    private Launcher _launcher = null;

    /**
     *  Constructor for the JTextViewer object
     */
    public JTextViewer() {
        super();
        _jtaText.setEditable(true);
        _jtaText.setForeground(Color.blue);
        _jtaText.setFont(_defaultFont);

        JPanel p = new JPanel();

        //p.setBackground(Color.white);
        p.setLayout(new BorderLayout());
        p.add(_jtaText, BorderLayout.CENTER);
        getViewport().add(p);
    }

    /**
     *  Adds a feature to the ViewerListener
     *  attribute of the JTextViewer object
     *
     *@param  vl  The feature to be added to
     *      the ViewerListener attribute
     */
    public void addViewerListener(ViewerListener vl) {
        _jtaText.addMouseListener(vl);
    }

    /**
     *  Description of the Method
     *
     *@param  e_zoomFactor  Description of
     *      Parameter
     */
    public void applyZoom(int e_zoomFactor) {
        Font f = _jtaText.getFont();

        switch (e_zoomFactor) {
        case ExplorerUtil.ZOOM_IN:
            f = new Font(f.getName(), f.getStyle(), f.getSize() + 1);

            break;

        case ExplorerUtil.ZOOM_OUT:
            f = new Font(f.getName(), f.getStyle(), Math.max(f.getSize() - 1, 2));

            break;

        default:
        case ExplorerUtil.ZOOM_FIT:
        case ExplorerUtil.ZOOM_NO:
            f = _defaultFont;

            break;
        }

        _jtaText.setFont(f);
    }

    /**
     *  Description of the Method
     *
     *@param  text  Description of Parameter
     */
    private void displayText(String text) {
        _jtaText.setText(text);
        _jtaText.setCaretPosition(0);
        repaint();
    }

    /**
     */
    public void freeRessource() {
    }

    /**
     *  Gets the XFile attribute of the JTextViewer
     *  object
     *
     *@return    The XFile value
     */
    public XFile getXFile() {
        return _xfile;
    }

    /**
     * Retourne le texte contenu dans le buffer de visu
     * (si modifi