private void dropDown(boolean drop) {
if (drop == isDropped()) return;
if (!drop) {
popup.setVisible(false);
if (!isDisposed() && arrow.isFocusControl()) {
text.setFocus();
}
return;
}
if (getShell() != popup.getParent()) {
String[] items = list.getItems();
int selectionIndex = list.getSelectionIndex();
list.removeListener(SWT.Dispose, listener);
popup.dispose();
popup = null;
list = null;
createPopup(items, selectionIndex);
}
computeShowArea();
popup.setAlpha(popup.getFinalAlpha());
popup.setVisible(true);
}
void comboEvent(Event event) {
switch (event.type) {
case SWT.Dispose:
if (popup != null && !popup.isDisposed()) {
list.removeListener(SWT.Dispose, listener);
popup.dispose();
}
Shell shell = getShell();
shell.removeListener(SWT.Deactivate, listener);
Display display = getDisplay();
display.removeFilter(SWT.FocusIn, filter);
popup = null;
text = null;
list = null;
arrow = null;
break;
case SWT.Move:
dropDown(false);
break;
case SWT.Resize:
internalLayout(false);
break;
}
}
