@Test
public void testDispose() {
final List<Object> disposedWidgets = new ArrayList<Object>();
DisposeListener disposeListener =
new DisposeListener() {
public void widgetDisposed(DisposeEvent evt) {
disposedWidgets.add(evt.getSource());
}
};
Display display = new Display();
Composite shell = new Shell(display, SWT.NONE);
shell.addDisposeListener(disposeListener);
Button button1 = new Button(shell, SWT.PUSH);
button1.addDisposeListener(disposeListener);
// Ensure that dipose removes a widget from its parent and sets isDisposed()
button1.dispose();
assertTrue(button1.isDisposed());
assertFalse(find(shell.getChildren(), button1));
assertSame(button1, disposedWidgets.get(0));
// Ensure that dispose may be called more than once
disposedWidgets.clear();
button1.dispose();
assertTrue(button1.isDisposed());
assertEquals(0, disposedWidgets.size());
Button button2 = new Button(shell, SWT.PUSH);
button2.addDisposeListener(disposeListener);
shell.dispose();
assertEquals(2, disposedWidgets.size());
assertSame(shell, disposedWidgets.get(0));
assertSame(button2, disposedWidgets.get(1));
assertTrue(shell.isDisposed());
assertTrue(button2.isDisposed());
// the assert below may not work in the future since getChildren is
// checkWidget()-protected
assertEquals(0, ControlHolder.size(shell));
assertEquals(0, Display.getCurrent().getShells().length);
//
disposedWidgets.clear();
shell.dispose();
assertEquals(0, disposedWidgets.size());
assertTrue(shell.isDisposed());
}
public void testAddRemoveListener() {
DisposeListener listener =
new DisposeListener() {
public void widgetDisposed(final DisposeEvent event) {
log += WIDGET_DISPOSED;
}
};
Display display = new Display();
Composite shell = new Shell(display, SWT.NONE);
shell.addDisposeListener(listener);
DisposeEvent event = new DisposeEvent(shell);
event.processEvent();
assertEquals(WIDGET_DISPOSED, log);
log = "";
shell.removeDisposeListener(listener);
event = new DisposeEvent(shell);
event.processEvent();
assertEquals("", log);
}
