ExtendedFixedColumnJTable.java

package com.rapidminer.gui.tools;

import javax.swing.JScrollPane;
import javax.swing.JViewport;
import javax.swing.ListSelectionModel;
import javax.swing.table.DefaultTableColumnModel;
import javax.swing.table.JTableHeader;
import javax.swing.table.TableColumn;
import javax.swing.table.TableColumnModel;
import javax.swing.table.TableModel;

public class ExtendedFixedColumnJTable extends JScrollPane {
	
	private static final long serialVersionUID = -5141975629639275878L;
	
	private ExtendedJTable mainDataTable;
	
	private ExtendedFixedColumnJTable(ExtendedJTable mainDataTable, JViewport viewport, JTableHeader header) {
		// we have to manually attach the row headers, but after that, the scroll pane keeps them in sync
		super(mainDataTable);
		this.mainDataTable = mainDataTable;
		setRowHeader(viewport);
		setCorner(JScrollPane.UPPER_LEFT_CORNER, header);
	}
	
	public static ExtendedFixedColumnJTable createFixedColumnTable(TableModel model) {
		// determine and set preferred size from data, use maximum size anyway
		int max = 0;
		for (int r = 0; r < model.getRowCount(); r++) {
			String valueString = model.getValueAt(r, 0).toString();
			max = Math.max(valueString.length() * 8, max);
		}
		final int preferredWidth = Math.min(max, 250);
		
		// create a column model for the main table. This model ignores the first column added
		TableColumnModel cm = new DefaultTableColumnModel() {
			
			private static final long serialVersionUID = -4882307040329823339L;
			
			private boolean first = true;
			
			public void addColumn(TableColumn tc) {
				if (first) { 
					first = false; 
					return;
				}
				super.addColumn(tc);
			}
		};

		// create a column model that will serve as our row header table. This model only stores the first column.
		TableColumnModel rowHeaderModel = new DefaultTableColumnModel() {
			
			private static final long serialVersionUID = -4852540063984136543L;
			
			private boolean first = true;
			
			public void addColumn(TableColumn tc) {
				if (first) {
					super.addColumn(tc);
					tc.setPreferredWidth(preferredWidth);
					first = false;
				}
			}
		};
		
		// shut off autoResizeMode, our tables won't scroll correctly (horizontally, anyway)!
		ExtendedJTable mainDataTable = new ExtendedJTable(model, false, true, false, true);
		mainDataTable.setColumnModel(cm);

		// header column
		ExtendedJTable headerColumn = new ExtendedJTable(model, false, true, false, true);
		headerColumn.setCellColorProvider(new CellColorProviderYellow());
		headerColumn.setColumnModel(rowHeaderModel);
		mainDataTable.createDefaultColumnsFromModel();
		headerColumn.createDefaultColumnsFromModel();
		
		headerColumn.getTableHeader().setReorderingAllowed(false);
		headerColumn.getTableHeader().setResizingAllowed(false);

		// make sure that selections between the main table and the header stay in sync (by sharing the same model)
		mainDataTable.getSelectionModel().setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
		mainDataTable.setSelectionModel(headerColumn.getSelectionModel());

		// adjust preferred size
        headerColumn.setPreferredScrollableViewportSize(headerColumn.getPreferredSize());
                
		// put it in a viewport that we can control a bit
		JViewport viewport = new JViewport();
		viewport.setView(headerColumn);
		viewport.setPreferredSize(headerColumn.getPreferredSize());

		return new ExtendedFixedColumnJTable(mainDataTable, viewport, headerColumn.getTableHeader());
	}
	
	public ExtendedJTable getMainDataTable() {
		return this.mainDataTable;
	}
}