Find a SWT table cell from mouse down (works for any table style)



/*
 * Table example snippet: find a table cell from mouse down (works for any table style)
 *
 * For a list of all SWT example snippets see
 * http://dev.eclipse.org/viewcvs/index.cgi/%7Echeckout%7E/platform-swt-home/dev.html#snippets
 */
import org.eclipse.swt.SWT;
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 Snippet110 {

  public static void main(String[] args) {
    Display display = new Display();
    Shell shell = new Shell(display);
    final Table table = new Table(shell, SWT.BORDER | SWT.V_SCROLL);
    table.setHeaderVisible(true);
    table.setLinesVisible(true);
    final int rowCount = 64, columnCount = 4;
    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++) {
        item.setText(j, "Item " + i + "-" + j);
      }
    }
    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 rect = item.getBounds(i);
            if (rect.contains(pt)) {
              System.out.println("Item " + index + "-" + i);
            }
            if (!visible && rect.intersects(clientArea)) {
              visible = true;
            }
          }
          if (!visible)
            return;
          index++;
        }
      }
    });
    shell.open();
    while (!shell.isDisposed()) {
      if (!display.readAndDispatch())
        display.sleep();
    }
    display.dispose();
  }
}

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Find a SWT table cell from mouse down (works for any table style) : Table « SWT JFace Eclipse « Java

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