/*******************************************************************************
* Copyright (c) 2000, 2007 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.vjet.eclipse.internal.ui.typehierarchy;
import org.eclipse.dltk.mod.core.IModelElement;
import org.eclipse.dltk.mod.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 VJOTypeHierarchyViewPart fView;
public ClearHistoryAction(VJOTypeHierarchyViewPart view) {
super(
TypeHierarchyMessages.HistoryDropDownAction_clearhistory_label);
fView = view;
}
public void run() {
fView.setHistoryEntries(new IModelElement[0]);
fView.setInputElement(null);
}
}
public static final int RESULTS_IN_DROP_DOWN = 10;
private VJOTypeHierarchyViewPart fHierarchyView;
private Menu fMenu;
public HistoryDropDownAction(VJOTypeHierarchyViewPart view) {
fHierarchyView = view;
fMenu = null;
setToolTipText(TypeHierarchyMessages.HistoryDropDownAction_tooltip);
DLTKPluginImages.setLocalImageDescriptors(this, "history_list.gif"); //$NON-NLS-1$
// PlatformUI.getWorkbench().getHelpSystem().setHelp(this,
// IJavaHelpContextIds.TYPEHIERARCHY_HISTORY_ACTION);
setMenuCreator(this);
}
public void dispose() {
// action is reused, can be called several times.
if (fMenu != null) {
fMenu.dispose();
fMenu = null;
}
}
public Menu getMenu(Menu parent) {
return null;
}
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);
}
public void run() {
(new HistoryListAction(fHierarchyView)).run();
}
}