マルチフォントのテキストエディタを作る(5ページ目)

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ソースコード

※FreeMultiFontEditor.java

package jp.tuyano.allabout;

import java.awt.*;
import java.awt.event.*;
import java.io.*;

import javax.swing.*;
import javax.swing.event.*;
import javax.swing.filechooser.FileFilter;
import javax.swing.text.*;
import javax.swing.text.rtf.RTFEditorKit;

import java.lang.reflect.*;

public class FreeMultiFontEditor extends JFrame {
  private static final long serialVersionUID = 1L;
  
  private JTextPane textpane;
  private AttributeSet selectedAttribute;
  private int selstart,selend;
  
  // コンストラクタ。基本コンポーネントの準備
  public FreeMultiFontEditor(){
    this.setLayout(new BorderLayout());
    createMenuBar();
    textpane = new JTextPane();
    StyleContext style = new StyleContext();
    DefaultStyledDocument doc =
        new DefaultStyledDocument(style);
    textpane.setDocument(doc);
    textpane.addCaretListener(new caretAction());
    JScrollPane spane = new JScrollPane(textpane);
    this.add(spane,BorderLayout.CENTER);
    this.newDoc();
    this.setSize(new Dimension(400,400));
    this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
  }
  
  // メニューバーの組み込み
  public void createMenuBar(){
    JMenuBar menubar = new JMenuBar();
    // file menu
    JMenu fmenu = new JMenu("File");
    menubar.add(fmenu);
    FileMenuAction fAction = new FileMenuAction();
    JMenuItem new_menu = new JMenuItem("New");
    new_menu.addActionListener(fAction);
    fmenu.add(new_menu);
    JMenuItem open_menu = new JMenuItem("Open...");
    open_menu.addActionListener(fAction);
    fmenu.add(open_menu);
    JMenuItem save_menu = new JMenuItem("Save...");
    save_menu.addActionListener(fAction);
    fmenu.add(save_menu);
    fmenu.addSeparator();
    JMenuItem quit_menu = new JMenuItem("Quit");
    quit_menu.addActionListener(fAction);
    fmenu.add(quit_menu);
    // font menu
    JMenu ftmenu = new JMenu("Font");
    menubar.add(ftmenu);
    FontMenuAction ftaction = new FontMenuAction();
    GraphicsEnvironment env = GraphicsEnvironment.
        getLocalGraphicsEnvironment();
    String fontarr[] = env.getAvailableFontFamilyNames();
    for (int i = 0; i < fontarr.length; i++) {
      JMenuItem family_menu = new JMenuItem(fontarr[i]);
      family_menu.addActionListener(ftaction);
      ftmenu.add(family_menu);
    }
    // size menu
    String[] narr = new String[]{"9","12","18",
        "24","36","48"};
    JMenu smenu = new JMenu("Size");
    menubar.add(smenu);
    SizeMenuAction saction = new SizeMenuAction();
    for (String str : narr) {
      JMenuItem size_menu = new JMenuItem(str);
      size_menu.addActionListener(saction);
      smenu.add(size_menu);
    }
    // color menu
    String[] carr = new String[]{"BLACK","RED","GREEN",
        "BLUE","CYAN","MAGENTA","YELLOW","GRAY"};
    JMenu cmenu = new JMenu("color");
    menubar.add(cmenu);
    ColorMenuAction staction = new ColorMenuAction();
    for(String str : carr){
      JMenuItem color_menu = new JMenuItem(str);
      color_menu.addActionListener(staction);
      cmenu.add(color_menu);
    }
    
    this.setJMenuBar(menubar);
  }
  
  // ＜New＞メニューの処理
  public void newDoc(){
    StyleContext style = new StyleContext();
    DefaultStyledDocument doc =
        new DefaultStyledDocument(style);
    textpane.setDocument(doc);
  }
  
  // ＜Open＞メニューの処理
  public void readFromFile(){
    StyleContext style = new StyleContext();
    DefaultStyledDocument doc = 
        new DefaultStyledDocument(style);
    RTFEditorKit rtfkit = new RTFEditorKit();
    File file = null;
    JFileChooser chooser = new JFileChooser();
    MyRTFFilter filter = new MyRTFFilter();
    chooser.setFileFilter(filter);
    int res = chooser.showOpenDialog(this);
    if (res == JFileChooser.APPROVE_OPTION){
      try {
        file = chooser.getSelectedFile();
        InputStream stream = new FileInputStream(file);
        rtfkit.read(stream, doc, 0);
        stream.close();
        textpane.setDocument(doc);
      } catch (FileNotFoundException e) {
        e.printStackTrace();
      } catch (IOException e) {
        e.printStackTrace();
      } catch (BadLocationException e) {
        e.printStackTrace();
      }
    }
  }
  
  // ＜Save＞メニューの処理
  public void saveToFile(){
    Document doc = textpane.getDocument();
    RTFEditorKit rtfEditor = new RTFEditorKit();
    File file = null;
    JFileChooser chooser = new JFileChooser();
    int res = chooser.showSaveDialog(this);
    if (res == JFileChooser.APPROVE_OPTION){
      try {
        file = chooser.getSelectedFile();
        OutputStream out = new FileOutputStream(file);
        rtfEditor.write(out,doc,0,doc.getLength());
        out.close();
      } catch (FileNotFoundException e) {
        e.printStackTrace();
      } catch (IOException e) {
        e.printStackTrace();
      } catch (BadLocationException e) {
        e.printStackTrace();
      }
    }
  }