private void setColumnPreferredSize() {
   for (int i = 0; i < getColumnCount(); i++) {
     TableColumn column = getColumnModel().getColumn(i);
     if (i == AbstractVcsLogTableModel.ROOT_COLUMN) { // thin stripe or nothing
       int rootWidth = myUI.getColorManager().isMultipleRoots() ? ROOT_INDICATOR_WIDTH : 0;
       // NB: all further instructions and their order are important, otherwise the minimum size
       // which is less than 15 won't be applied
       column.setMinWidth(rootWidth);
       column.setMaxWidth(rootWidth);
       column.setPreferredWidth(rootWidth);
     } else if (i
         == AbstractVcsLogTableModel
             .COMMIT_COLUMN) { // let commit message occupy as much as possible
       column.setPreferredWidth(Short.MAX_VALUE);
     } else if (i
         == AbstractVcsLogTableModel.AUTHOR_COLUMN) { // detect author with the longest name
       int contentWidth = calcMaxContentColumnWidth(i, 1000);
       column.setMinWidth(Math.min(contentWidth, MAX_DEFAULT_AUTHOR_COLUMN_WIDTH));
       column.setWidth(column.getMinWidth());
     } else if (i == AbstractVcsLogTableModel.DATE_COLUMN) { // all dates have nearly equal sizes
       Font tableFont = UIManager.getFont("Table.font");
       column.setMinWidth(
           getFontMetrics(tableFont)
               .stringWidth("mm" + DateFormatUtil.formatDateTime(new Date())));
       column.setWidth(column.getMinWidth());
     }
   }
 }
 private int calcMaxContentColumnWidth(int columnIndex, int maxRowsToCheck) {
   int maxWidth = 0;
   for (int row = 0; row < maxRowsToCheck && row < getRowCount(); row++) {
     TableCellRenderer renderer = getCellRenderer(row, columnIndex);
     Component comp = prepareRenderer(renderer, row, columnIndex);
     maxWidth = Math.max(comp.getPreferredSize().width, maxWidth);
   }
   return maxWidth + UIUtil.DEFAULT_HGAP;
 }