Bug 153398 Invalid thread access in Snippet133
Running SWT Snippet 133 (print text to printer) throws this exception: Exception in thread "Printing" org.eclipse.swt.SWTException: Invalid thread access at org.eclipse.swt.SWT.error(SWT.java:3374) at org.eclipse.swt.SWT.error(SWT.java:3297) at org.eclipse.swt.SWT.error(SWT.java:3268) at org.eclipse.swt.widgets.Widget.error(Widget.java:435) at org.eclipse.swt.widgets.Widget.checkWidget(Widget.java:331) at org.eclipse.swt.widgets.Control.getFont(Control.java:939) at org.eclipse.swt.snippets.Snippet133.print(Snippet133.java:230) at org.eclipse.swt.snippets.Snippet133$7.run(Snippet133.java:204) It works if you patch the line: printingThread.start(); with this: display.syncExec(printingThread);
examples/org.eclipse.swt.snippets/src/org/eclipse/swt/snippets/Snippet133.java
item.addSelectionListener(new SelectionAdapter() {
			public void widgetSelected(SelectionEvent event) {
				menuOpen();
			}
		});
		item = new MenuItem(fileMenu, SWT.PUSH);
		item.setText("Font...");
		item.addSelectionListener(new SelectionAdapter() {
			public void widgetSelected(SelectionEvent event) {
				menuFont();
			}
		});
		item = new MenuItem(fileMenu, SWT.PUSH);
		item.setText("Foreground Color...");
		item.addSelectionListener(new SelectionAdapter() {
			public void widgetSelected(SelectionEvent event) {
				menuForegroundColor();
			}
		});
		item = new MenuItem(fileMenu, SWT.PUSH);
		item.setText("Background Color...");
		item.addSelectionListener(new SelectionAdapter() {
			public void widgetSelected(SelectionEvent event) {
				menuBackgroundColor();
			}
		});
		item = new MenuItem(fileMenu, SWT.PUSH);
		item.setText("&Print...");
		item.setAccelerator(SWT.CTRL + 'P');
		item.addSelectionListener(new SelectionAdapter() {