Bug 81102

Comment 1 Tom Hofmann 2004-12-15 06:21:16 EST

Created attachment 16633 [details]
cms.png

Comment 2 Dirk Baeumer 2004-12-15 10:20:50 EST

Markus, please investigate and coordinate with Andre.

Comment 3 Markus Keller 2005-02-15 13:08:28 EST

Looks like the table widget has problems calculating the relative coordinates on
GTK.

Comment 4 Markus Keller 2005-03-14 13:42:16 EST

Moving to Platform/SWT.

I debugged this, and the coordinate transformations look fine.
The snippet below shows that the bug is in the GTK table drawing code.

With table.setHeaderVisible (true), the oval is not drawn around the item.
With table.setHeaderVisible (false), the oval is more or less correctly drawn.

I went back to 3.0.0, and found that this bug is already present in that build.

package p;

import org.eclipse.swt.SWT;
import org.eclipse.swt.events.PaintEvent;
import org.eclipse.swt.events.PaintListener;
import org.eclipse.swt.graphics.Rectangle;
import org.eclipse.swt.widgets.Display;
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 SnippetBug81102 {

public static void main (String [] args) {
	Display display = new Display ();
	Shell shell = new Shell (display);
	Table table = new Table (shell, SWT.MULTI | SWT.BORDER | SWT.FULL_SELECTION);
	table.setLinesVisible (true);
	table.setHeaderVisible (true); // swap this
	String[] titles = {"Column 1", "Column 1"};
	for (int i=0; i<titles.length; i++) {
		TableColumn column = new TableColumn (table, SWT.NULL);
		column.setText (titles [i]);
	}	
	int count = 5;
	for (int i=0; i<count; i++) {
		TableItem item = new TableItem (table, SWT.NULL);
		item.setText (0, "line " + i);
	}
	for (int i=0; i<titles.length; i++) {
		table.getColumn (i).pack ();
	}
	
	final TableItem item0 = table.getItem(0);
	item0.setText(1, "item0");
	
	table.addPaintListener(new PaintListener() {
		public void paintControl(PaintEvent e) {
			Rectangle b = item0.getBounds(1);
			e.gc.drawOval(b.x, b.y, b.width, b.height);
		}
	});
	
	table.setSize (table.computeSize (SWT.DEFAULT, 200));
	shell.pack ();
	shell.open ();
	while (!shell.isDisposed ()) {
		if (!display.readAndDispatch ()) display.sleep ();
	}
	display.dispose ();
}
} 

Comment 5 Veronika Irvine 2005-03-15 13:23:06 EST

Marking as a duplicate of bug 42416.

Please note that drawing in the paint event of a widget is not a reliable 
thing to do.  It assumes that native widgets only draw in their paint events 
and this is not guaranteed.  The paint event is really for drawing your own 
custom widget on a Composite or Canvas.  Drawing on other widgets can result 
in random cheese.

*** This bug has been marked as a duplicate of 42416 ***