マルチフォントのテキストエディタを作る(6ページ目)

リストの続き

  // AttributeSetに選択位置のスタイルを設定する
  public MutableAttributeSet setStyles(MutableAttributeSet attr){
    String font = StyleConstants.
        getFontFamily(selectedAttribute);
    StyleConstants.setFontFamily(attr, font);
    int size = StyleConstants.
        getFontSize(selectedAttribute);
    StyleConstants.setFontSize(attr,size);
    Color c = StyleConstants.
        getForeground(selectedAttribute);
    StyleConstants.setForeground(attr,c);
    return attr;
  }
  
  public static void main(String[] args) {
    new FreeMultiFontEditor().setVisible(true);
  }
  
  // JTextPaneのCaretListenerクラス
  class caretAction implements CaretListener {
    public void caretUpdate(CaretEvent ev) {
      selstart = textpane.getSelectionStart();
      selend = textpane.getSelectionEnd();
      StyledDocument doc = textpane.getStyledDocument();
      selectedAttribute = doc.getCharacterElement
          (selstart).getAttributes();
      selstart = textpane.getSelectionStart();
    }
  }
  
  // ＜File＞メニュー用ActionListenerクラス
  class FileMenuAction implements ActionListener {
    public void actionPerformed(ActionEvent ev) {
      String cmd = ev.getActionCommand();
      if (cmd.equals("New")){
        newDoc();
      } else if (cmd.equals("Open...")){
        readFromFile();
      } else if (cmd.equals("Save...")){
        saveToFile();
      } else if (cmd.equals("Quit")){
        System.exit(0);
      }
    }
  }
  
  // ＜Font＞メニュー用ActionListenerクラス
  class FontMenuAction implements ActionListener {
    public void actionPerformed(ActionEvent ev) {
      String cmd = ev.getActionCommand();
      MutableAttributeSet attr = new SimpleAttributeSet();
      attr = setStyles(attr);
      StyleConstants.setFontFamily(attr,cmd);
      StyledDocument doc = textpane.getStyledDocument();
      doc.setCharacterAttributes(selstart,
          selend - selstart,attr,true);
      textpane.select(selstart,selend);
    }
  }
  
  // ＜Size＞メニュー用ActionListenerクラス
  class SizeMenuAction implements ActionListener {
    public void actionPerformed(ActionEvent ev) {
      String cmd = ev.getActionCommand();
      int n;
      try {
        n = Integer.parseInt(cmd);
      } catch (NumberFormatException e) {
        e.printStackTrace();
        n = 12;
      }
      MutableAttributeSet attr = new SimpleAttributeSet();
      attr = setStyles(attr);
      StyleConstants.setFontSize(attr,n);
      StyledDocument doc = textpane.getStyledDocument();
      doc.setCharacterAttributes(selstart,
          selend - selstart, attr, true);
      textpane.select(selstart,selend);
    }
  }