Swing/AutoWrapTableCell のバックアップの現在との差分(No.4)

#spanend
#spanadd
class TextAreaCellRenderer extends JTextArea implements TableCellRenderer {
#spanend
  private final List<List<Integer>> cellHeights = new ArrayList<>();

#spandel
**サンプルコード [#f1f7d94f]
#spanend
#spandel
#code{{
#spanend
#spandel
JTable table = new JTable(model) {
#spanend
  @Override public void doLayout() {
    initPreferredHeight();
    super.doLayout();
  @Override public void updateUI() {
    super.updateUI();
    setLineWrap(true);
    setBorder(BorderFactory.createEmptyBorder(2, 2, 2, 2));
    setName("Table.cellRenderer");
  }
  @Override public void columnMarginChanged(ChangeEvent e) {
    initPreferredHeight();
    super.columnMarginChanged(e);
  @Override public Component getTableCellRendererComponent(
      JTable table, Object value, boolean isSelected, boolean hasFocus,
      int row, int column) {
    setFont(table.getFont());
    setText(Objects.toString(value, ""));
    adjustRowHeight(table, row, column);
    return this;
  }
  private void initPreferredHeight() {
    int vc = convertColumnIndexToView(AUTOWRAP_COLUMN);
    TableColumn col = getColumnModel().getColumn(vc);
    for(int row=0; row<getRowCount(); row++) {
      Component c = prepareRenderer(col.getCellRenderer(), row, vc);
      if(c instanceof JTextArea) {
        JTextArea a = (JTextArea)c;
        int h = getPreferredHeight(a); // + getIntercellSpacing().height;
        //if(getRowHeight(row)!=h)
        setRowHeight(row, h);
      }
#spanadd

#spanend
  /**
   * Calculate the new preferred height for a given row,
   * and sets the height on the table.
   * http://blog.botunge.dk/post/2009/10/09/JTable-multiline-cell-renderer.aspx
   */
  private void adjustRowHeight(JTable table, int row, int column) {
  // The trick to get this to work properly is to set the width of the column to
  // the textarea. The reason for this is that getPreferredSize(), without a width
  // tries to place all the text in one line.
  // By setting the size with the width of the column,
  // getPreferredSize() returnes the proper height which the row should have in
  // order to make room for the text.
  // int cWidth = table.getTableHeader().getColumnModel().getColumn(column).getWidth();
  // int cWidth = table.getCellRect(row, column, false).width; // IntercellSpacingを無視
  // setSize(new Dimension(cWidth, 1000));
#spanadd

#spanend
    setBounds(table.getCellRect(row, column, false)); // setSizeではなくsetBoundsでも可
    // doLayout(); // 必要なさそう
#spanadd

#spanend
    int preferredHeight = getPreferredSize().height;
    while (cellHeights.size() <= row) {
      cellHeights.add(new ArrayList<>(column));
    }
    List<Integer> list = cellHeights.get(row);
    while (list.size() <= column) {
      list.add(0);
    }
    list.set(column, preferredHeight);
    int max = list.stream().max(Integer::compare).get();
    if (table.getRowHeight(row) != max) {
      table.setRowHeight(row, max);
    }
  }
  //http://tips4java.wordpress.com/2008/10/26/text-utilities/
  private int getPreferredHeight(JTextComponent c) {
    Insets insets = c.getInsets();
    View view = c.getUI().getRootView(c).getView(0);
    int preferredHeight = (int)view.getPreferredSpan(View.Y_AXIS);
    return preferredHeight + insets.top + insets.bottom;
  }
#spandel
};
#spanend
#spanadd
}
#spanend