Description Andreas Muelder 2012-01-04 10:28:40 EST

Build Identifier: 20110916-0149

The conversion from tabs (\t) to whitespace is different for Text widget, StyledText widget and GC. 
The behaviour changes for different operating systems.





Reproducible: Always

Steps to Reproduce:
public class SWTTabBug {
	public static void main(String[] args) {
		final Display display = new Display();
		final Shell shell = new Shell(display);
		shell.setLayout(new GridLayout(1, true));

		FontData fd = shell.getFont().getFontData()[0];
		final Font font = new Font(display, fd.getName(), 60, SWT.BOLD
				| SWT.ITALIC);
		final Image image = new Image(display, 640, 480);
		final Rectangle rect = image.getBounds();
		GC gc = new GC(image);
		gc.setBackground(display.getSystemColor(SWT.COLOR_RED));
		gc.fillOval(rect.x, rect.y, rect.width, rect.height);
		gc.dispose();

		shell.addListener(SWT.Paint, new Listener() {
			public void handleEvent(Event event) {
				GC gc = event.gc;
				gc.drawText("Start\tEnd", 0, 50);
			}
		});

		StyledText styledText = new StyledText(shell, SWT.NONE);
		styledText.setText("Start\tEnd");
		GridData data = new GridData();
		data.grabExcessHorizontalSpace = true;
		data.horizontalAlignment = GridData.FILL;
		styledText.setLayoutData(data);
		Text text = new Text(shell, SWT.NONE);
		text.setText("Start\tTab");
		data = new GridData();
		data.grabExcessHorizontalSpace = true;
		data.horizontalAlignment = GridData.FILL;
		text.setLayoutData(data);
		shell.setSize(shell.computeSize(rect.width / 2, rect.height / 2));
		shell.open();
		while (!shell.isDisposed()) {
			if (!display.readAndDispatch())
				display.sleep();
		}
		image.dispose();
		font.dispose();
		display.dispose();
	}
}