| /******************************************************************************* |
| * Copyright (c) 2000, 2017 IBM Corporation and others. |
| * All rights reserved. This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License v1.0 |
| * which accompanies this distribution, and is available at |
| * http://www.eclipse.org/legal/epl-v10.html |
| * |
| *******************************************************************************/ |
| package org.eclipse.dltk.internal.ui.typehierarchy; |
| |
| import org.eclipse.dltk.core.IModelElement; |
| import org.eclipse.dltk.ui.DLTKPluginImages; |
| import org.eclipse.jface.action.Action; |
| import org.eclipse.jface.action.ActionContributionItem; |
| import org.eclipse.jface.action.IMenuCreator; |
| import org.eclipse.swt.SWT; |
| import org.eclipse.swt.widgets.Control; |
| import org.eclipse.swt.widgets.Menu; |
| import org.eclipse.swt.widgets.MenuItem; |
| |
| public class HistoryDropDownAction extends Action implements IMenuCreator { |
| |
| public static class ClearHistoryAction extends Action { |
| |
| private TypeHierarchyViewPart fView; |
| |
| public ClearHistoryAction(TypeHierarchyViewPart view) { |
| super(TypeHierarchyMessages.HistoryDropDownAction_clearhistory_label); |
| fView= view; |
| } |
| |
| @Override |
| public void run() { |
| fView.setHistoryEntries(new IModelElement[0]); |
| fView.setInputElement(null); |
| } |
| } |
| |
| public static final int RESULTS_IN_DROP_DOWN= 10; |
| |
| private TypeHierarchyViewPart fHierarchyView; |
| private Menu fMenu; |
| |
| public HistoryDropDownAction(TypeHierarchyViewPart view) { |
| fHierarchyView= view; |
| fMenu= null; |
| setToolTipText(TypeHierarchyMessages.HistoryDropDownAction_tooltip); |
| DLTKPluginImages.setLocalImageDescriptors(this, "history_list.png"); //$NON-NLS-1$ |
| //PlatformUI.getWorkbench().getHelpSystem().setHelp(this, IJavaHelpContextIds.TYPEHIERARCHY_HISTORY_ACTION); |
| setMenuCreator(this); |
| } |
| |
| @Override |
| public void dispose() { |
| // action is reused, can be called several times. |
| if (fMenu != null) { |
| fMenu.dispose(); |
| fMenu= null; |
| } |
| } |
| |
| @Override |
| public Menu getMenu(Menu parent) { |
| return null; |
| } |
| |
| @Override |
| public Menu getMenu(Control parent) { |
| if (fMenu != null) { |
| fMenu.dispose(); |
| } |
| fMenu= new Menu(parent); |
| IModelElement[] elements= fHierarchyView.getHistoryEntries(); |
| addEntries(fMenu, elements); |
| new MenuItem(fMenu, SWT.SEPARATOR); |
| addActionToMenu(fMenu, new HistoryListAction(fHierarchyView)); |
| addActionToMenu(fMenu, new ClearHistoryAction(fHierarchyView)); |
| return fMenu; |
| } |
| |
| private boolean addEntries(Menu menu, IModelElement[] elements) { |
| boolean checked= false; |
| |
| int min= Math.min(elements.length, RESULTS_IN_DROP_DOWN); |
| for (int i= 0; i < min; i++) { |
| HistoryAction action= new HistoryAction(fHierarchyView, elements[i]); |
| action.setChecked(elements[i].equals(fHierarchyView.getInputElement())); |
| checked= checked || action.isChecked(); |
| addActionToMenu(menu, action); |
| } |
| |
| |
| return checked; |
| } |
| |
| |
| protected void addActionToMenu(Menu parent, Action action) { |
| ActionContributionItem item= new ActionContributionItem(action); |
| item.fill(parent, -1); |
| } |
| |
| @Override |
| public void run() { |
| (new HistoryListAction(fHierarchyView)).run(); |
| } |
| } |