org.eclipse.pde.internal.ui.views.dependencies.HistoryDropDownAction Maven / Gradle / Ivy
/*******************************************************************************
* Copyright (c) 2000, 2015 IBM Corporation and others.
*
* This program and the accompanying materials
* are made available under the terms of the Eclipse Public License 2.0
* which accompanies this distribution, and is available at
* https://www.eclipse.org/legal/epl-2.0/
*
* SPDX-License-Identifier: EPL-2.0
*
* Contributors:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.pde.internal.ui.views.dependencies;
import org.eclipse.jface.action.*;
import org.eclipse.pde.internal.ui.PDEPluginImages;
import org.eclipse.pde.internal.ui.PDEUIMessages;
import org.eclipse.swt.SWT;
import org.eclipse.swt.widgets.*;
public class HistoryDropDownAction extends Action implements IMenuCreator {
public static final int RESULTS_IN_DROP_DOWN = 10;
private Menu fMenu;
private DependenciesView fView;
public HistoryDropDownAction(DependenciesView view) {
fView = view;
fMenu = null;
setToolTipText(PDEUIMessages.HistoryDropDownAction_tooltip);
setImageDescriptor(PDEPluginImages.DESC_HISTORY_LIST);
setDisabledImageDescriptor(PDEPluginImages.DESC_HISTORY_LIST_DISABLED);
setMenuCreator(this);
}
protected void addActionToMenu(Menu parent, Action action) {
ActionContributionItem item = new ActionContributionItem(action);
item.fill(parent, -1);
}
private boolean addEntries(Menu menu, String[] 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(fView, elements[i]);
action.setChecked(elements[i].equals(fView.getInput()));
checked = checked || action.isChecked();
addActionToMenu(menu, action);
}
return checked;
}
@Override
public void dispose() {
// action is reused, can be called several times.
if (fMenu != null) {
fMenu.dispose();
fMenu = null;
}
}
@Override
public Menu getMenu(Control parent) {
if (fMenu != null) {
fMenu.dispose();
}
fMenu = new Menu(parent);
String[] elements = fView.getHistoryEntries();
boolean checked = addEntries(fMenu, elements);
if (elements.length > RESULTS_IN_DROP_DOWN) {
new MenuItem(fMenu, SWT.SEPARATOR);
Action others = new HistoryListAction(fView);
others.setChecked(checked);
addActionToMenu(fMenu, others);
}
return fMenu;
}
@Override
public Menu getMenu(Menu parent) {
return null;
}
@Override
public void run() {
(new HistoryListAction(fView)).run();
}
}