import org.eclipse.swt.SWT;
import org.eclipse.swt.graphics.Image;
import org.eclipse.swt.graphics.ImageData;
import org.eclipse.swt.graphics.PaletteData;
import org.eclipse.swt.graphics.Point;
import org.eclipse.swt.graphics.Rectangle;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Event;
import org.eclipse.swt.widgets.Listener;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.swt.widgets.Table;
import org.eclipse.swt.widgets.TableColumn;
import org.eclipse.swt.widgets.TableItem;

public class DetectClickedCell
{
    public static void main(String[] args)
    {
        final Display display = new Display();
        Shell shell = new Shell(display);
        final Table table = new Table(shell, SWT.BORDER | SWT.V_SCROLL | SWT.FULL_SELECTION| SWT.MULTI);
        table.setHeaderVisible(true);
        table.setLinesVisible(true);
        final int rowCount = 64, columnCount = 2;
        
        final int FIRST_IMAGE_WIDTH = 48;
        final int CHECK_WIDTH = 10;
        
        // Default image for first table column, dimensions 48 x 10 px
        final Image firstImage = getImage(display, 0xFF0000, FIRST_IMAGE_WIDTH);
        
        // Image representing checked item state, dimensions 10 x 10 px, second column
        final Image checked = getImage(display, 0xFF, CHECK_WIDTH);
        
        // Image representing unchecked item state, dimensions 10 x 10 px, second column
        final Image unChecked = getImage(display, 0xFF00, CHECK_WIDTH);
        
        Image images[] = {checked, unChecked};
        
        for (int i = 0; i < columnCount; i++)
        {
            TableColumn column = new TableColumn(table, SWT.NONE);
            column.setText("Column " + i);
        }
        
        for (int i = 0; i < rowCount; i++)
        {
            TableItem item = new TableItem(table, SWT.NONE);
            for (int j = 0; j < columnCount; j++)
            {   
                if (j == 0)
                {
                    item.setText(j, "Item " + i + "-" + j);
                    
                    // Comment the following line in order to display
                    // second column images with correct width
                    item.setImage(j, firstImage);
                }                
                else
                {
                    int state = (int)Math.round(Math.random());
                    
                    item.setImage(j, images[state]);
                    
                    int[] data = {state};                    
                    item.setData(data);
                }
            }
        }

        for (int i = 0; i < columnCount; i++)
        {
            table.getColumn(i).pack();
        }

        Point size = table.computeSize(SWT.DEFAULT, 200);
        table.setSize(size);
        shell.pack();
        table.addListener(SWT.MouseDown, new Listener()
        {
            public void handleEvent(Event event)
            {
                Rectangle clientArea = table.getClientArea();
                Point pt = new Point(event.x, event.y);
                int index = table.getTopIndex();
                while (index < table.getItemCount())
                {
                    boolean visible = false;
                    TableItem item = table.getItem(index);
                    for (int i = 0; i < columnCount; i++)
                    {   
                        Rectangle itemRectangle = item.getBounds(i);
                        
                        if (itemRectangle != null && itemRectangle.contains(pt))
                        {   
                            int[] oldData = (int[]) item.getData();                            
                            int[] newData = new int[1];
                            
                            if (i == columnCount - 1)
                            {   
                                // If a cell inside the last column is clicked,
                                // change image on click
                                if (oldData[0] == 1)
                                {   
                                    item.setImage(i, checked);
                                    newData[0] = 0;
                                }
                                else
                                {
                                    item.setImage(i, unChecked);
                                    newData[0] = 1;
                                }   
                            }
                            item.setData(newData);
                        }
                        
                        if (!visible && itemRectangle.intersects(clientArea))
                        {
                            visible = true;
                        }
                    }
                    if (!visible)
                    {
                        return;
                    }
                    index++;
                }
            }
        });
        shell.open();
        while (!shell.isDisposed())
        {
            if (!display.readAndDispatch())
            {
                display.sleep();
            }   
        }
        display.dispose();
    }
    
    public static Image getImage(Display display, int color, int width)
    {
        PaletteData palette = new PaletteData(0xFF , 0xFF00 , 0xFF0000);
        ImageData imageData = new ImageData(width, 10, 24, palette);    

        for (int x = 0; x < width; x++)
        {
            for (int y = 0; y < 10; y++)
            {
                imageData.setPixel(x, y, color);
            }
        }
        
        return new Image(display,imageData);
    }
}