private static void drawSelection(JTable table, int column, Graphics g, final int width) { int y = 0; final int[] rows = table.getSelectedRows(); final int height = table.getRowHeight(); for (int row : rows) { final TableCellRenderer renderer = table.getCellRenderer(row, column); final Component component = renderer.getTableCellRendererComponent( table, table.getValueAt(row, column), false, false, row, column); g.translate(0, y); component.setBounds(0, 0, width, height); boolean wasOpaque = false; if (component instanceof JComponent) { final JComponent j = (JComponent) component; if (j.isOpaque()) wasOpaque = true; j.setOpaque(false); } component.paint(g); if (wasOpaque) { ((JComponent) component).setOpaque(true); } y += height; g.translate(0, -y); } }
public static Image createImage(final JTable table, int column) { final int height = Math.max(20, Math.min(100, table.getSelectedRowCount() * table.getRowHeight())); final int width = table.getColumnModel().getColumn(column).getWidth(); final BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_ARGB); Graphics2D g2 = (Graphics2D) image.getGraphics(); g2.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_OVER, 0.7f)); drawSelection(table, column, g2, width); return image; }