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 listEvent(Event event) {
switch (event.type) {
case SWT.Dispose:
if (getShell() != popup.getParent()) {
String[] items = list.getItems();
int selectionIndex = list.getSelectionIndex();
popup = null;
list = null;
createPopup(items, selectionIndex);
}
break;
case SWT.FocusIn:
{
handleFocus(SWT.FocusIn);
break;
}
case SWT.MouseUp:
{
if (event.button != 1) return;
dropDown(false);
break;
}
case SWT.Selection:
{
int index = list.getSelectionIndex();
if (index == -1) return;
text.setText(list.getItem(index));
// text.selectAll ();
list.setSelection(index);
// list.forceFocus();
Event e = new Event();
e.time = event.time;
e.stateMask = event.stateMask;
e.doit = event.doit;
notifyListeners(SWT.Selection, e);
event.doit = e.doit;
break;
}
case SWT.Traverse:
{
switch (event.detail) {
case SWT.TRAVERSE_RETURN:
case SWT.TRAVERSE_ESCAPE:
case SWT.TRAVERSE_ARROW_PREVIOUS:
case SWT.TRAVERSE_ARROW_NEXT:
event.doit = false;
break;
}
Event e = new Event();
e.time = event.time;
e.detail = event.detail;
e.doit = event.doit;
e.character = event.character;
e.keyCode = event.keyCode;
notifyListeners(SWT.Traverse, e);
event.doit = e.doit;
event.detail = e.detail;
break;
}
case SWT.KeyUp:
{
Event e = new Event();
e.time = event.time;
e.character = event.character;
e.keyCode = event.keyCode;
e.stateMask = event.stateMask;
notifyListeners(SWT.KeyUp, e);
break;
}
case SWT.KeyDown:
{
if (event.character == SWT.ESC) {
// Escape key cancels popup list
dropDown(false);
}
if ((event.stateMask & SWT.ALT) != 0
&& (event.keyCode == SWT.ARROW_UP || event.keyCode == SWT.ARROW_DOWN)) {
dropDown(false);
}
if (event.character == SWT.CR) {
// Enter causes default selection
dropDown(false);
Event e = new Event();
e.time = event.time;
e.stateMask = event.stateMask;
notifyListeners(SWT.DefaultSelection, e);
}
// At this point the widget may have been disposed.
// If so, do not continue.
if (isDisposed()) break;
Event e = new Event();
e.time = event.time;
e.character = event.character;
e.keyCode = event.keyCode;
e.stateMask = event.stateMask;
notifyListeners(SWT.KeyDown, e);
break;
}
}
}
