Re: [platform-swt-dev] About the event.item of DropTargetEvent!

[Steve Northover <Steve_Northover@xxxxxxxxxx>]

Please enter a bug report for the problem
and attach the snippet.  Thanks!

bbskill <bbkills@xxxxxxx>
Sent by: platform-swt-dev-bounces@xxxxxxxxxxx

05/19/2006 11:09 PM

Please respond to
"Eclipse Platform SWT component developers list."

To	platform-swt-dev@xxxxxxxxxxx
cc
Subject	[platform-swt-dev] About the event.item of DropTargetEvent!

Hi ,all,
    I have found s strage behavior of event.item of DragTargetEvent
!.  
I set a DragSource and DragTarget to a
Table whose headers are visible. And When I drag one of its item, the 
DrapTargetEvent.item doesn't point the
right item, actually it seems it point down by one item. I think it 
counts for the visible headers of the table.
below is my code:
import org.eclipse.swt.*; import org.eclipse.swt.dnd.*;
import org.eclipse.swt.layout.*;
import org.eclipse.swt.widgets.*;
/**
 * This program illustrates dragging
 */
public class Snippet185 {
  /**
   * Runs the application
   */
  public void run() {
    Display display = new Display();
    Shell shell = new Shell(display);
    createContents(shell);
    shell.open();
    while (!shell.isDisposed()) {
      if (!display.readAndDispatch()) {
        display.sleep();
      }
    }
    display.dispose();
  }
  private void createContents(Shell shell) {
    shell.setLayout(new FillLayout());
   
    Table table = new Table(shell, SWT.BORDER | SWT.H_SCROLL
| 
SWT.V_SCROLL);
    table.setHeaderVisible(true);
    TableColumn column = new TableColumn(table, SWT.NONE);
    column.setText("column 1");
    // Seed the table
    TableItem item = new TableItem(table, SWT.NONE);
    item.setText(new String[] { "Test 1"});
    item = new TableItem(table, SWT.NONE);
    item.setText(new String[] { "Test 2"});
    item = new TableItem(table, SWT.BORDER);
    item.setText(new String[] { "Test 3 "});
    
    // Seed the table
    column.pack();
    // Create the types
    Transfer[] types = new Transfer[] { TextTransfer.getInstance()};
    // Create the drag source
    DragSource source = new DragSource(table, DND.DROP_MOVE |
DND.DROP_COPY);
    source.setTransfer(types);
    source.addDragListener(new DragSourceAdapter() {
      public void dragSetData(DragSourceEvent event) {
          event.data = "">
      }
    });
    // Create the drop target
    DropTarget target = new DropTarget(table,
      DND.DROP_MOVE | DND.DROP_COPY | DND.DROP_DEFAULT);
    target.setTransfer(types);
    target.addDropListener(new DropTargetAdapter() {
     
      public void drop(DropTargetEvent event) {
          System.out.println(event.item);
      }
    });
  }
  /**
   * The application entry point
   * @param args the command line arguments
   */
  public static void main(String[] args) {
    new Snippet185().run();
  }
}
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