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; } } }