/**
* Determines if the selection was on the dropdown affordance and, if so, opens the drop down menu
* (populated using the same id as this item...
*
* @param event The <code>SWT.Selection</code> event to be tested
* @return <code>true</code> iff a drop down menu was opened
*/
private boolean openDropDownMenu(Event event) {
Widget item = event.widget;
if (item != null) {
int style = item.getStyle();
if ((style & SWT.DROP_DOWN) != 0) {
if (event.detail == 4) { // on drop-down button
ToolItem ti = (ToolItem) item;
final MenuManager menuManager = new MenuManager();
Menu menu = menuManager.createContextMenu(ti.getParent());
menuManager.addMenuListener(
new IMenuListener() {
public void menuAboutToShow(IMenuManager manager) {
String id = getId();
if (dropDownMenuOverride != null) {
id = dropDownMenuOverride;
}
menuService.populateContributionManager(menuManager, "menu:" + id); // $NON-NLS-1$
}
});
// position the menu below the drop down item
Rectangle b = ti.getBounds();
Point p = ti.getParent().toDisplay(new Point(b.x, b.y + b.height));
menu.setLocation(p.x, p.y); // waiting for SWT
// 0.42
menu.setVisible(true);
return true; // we don't fire the action
}
}
}
return false;
}
private void handleWidgetDispose(Event event) {
if (event.widget == widget) {
widget.removeListener(SWT.Selection, getItemListener());
widget.removeListener(SWT.Dispose, getItemListener());
widget = null;
disposeOldImages();
}
}