| /******************************************************************************* |
| * Copyright (c) 2000, 2018 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.jface.internal.text.link.contentassist; |
| |
| |
| import static org.eclipse.jface.util.Util.isValid; |
| |
| import org.eclipse.swt.events.FocusEvent; |
| import org.eclipse.swt.events.FocusListener; |
| import org.eclipse.swt.events.SelectionEvent; |
| import org.eclipse.swt.events.SelectionListener; |
| import org.eclipse.swt.events.ShellAdapter; |
| import org.eclipse.swt.events.ShellEvent; |
| import org.eclipse.swt.widgets.Display; |
| import org.eclipse.swt.widgets.ScrollBar; |
| import org.eclipse.swt.widgets.Shell; |
| import org.eclipse.swt.widgets.Table; |
| |
| |
| /** |
| * A generic closer class used to monitor various |
| * interface events in order to determine whether |
| * a content assistant should be terminated and all |
| * associated windows be closed. |
| */ |
| class PopupCloser2 extends ShellAdapter implements FocusListener, SelectionListener { |
| |
| /** The content assistant to be monitored */ |
| private ContentAssistant2 fContentAssistant; |
| /** The table of a selector popup opened by the content assistant */ |
| private Table fTable; |
| /** The scrollbar of the table for the selector popup */ |
| private ScrollBar fScrollbar; |
| /** Indicates whether the scrollbar thumb has been grabbed. */ |
| private boolean fScrollbarClicked= false; |
| /** The shell on which some listeners are registered. */ |
| private Shell fShell; |
| |
| |
| /** |
| * Installs this closer on the given table opened by the given content assistant. |
| * |
| * @param contentAssistant the content assistant |
| * @param table the table to be tracked |
| */ |
| public void install(ContentAssistant2 contentAssistant, Table table) { |
| fContentAssistant= contentAssistant; |
| fTable= table; |
| if (isValid(fTable)) { |
| Shell shell= fTable.getShell(); |
| if (isValid(shell)) { |
| fShell= shell; |
| fShell.addShellListener(this); |
| } |
| fTable.addFocusListener(this); |
| fScrollbar= fTable.getVerticalBar(); |
| if (fScrollbar != null) |
| fScrollbar.addSelectionListener(this); |
| } |
| } |
| |
| /** |
| * Uninstalls this closer if previously installed. |
| */ |
| public void uninstall() { |
| fContentAssistant= null; |
| if (isValid(fShell)) |
| fShell.removeShellListener(this); |
| fShell= null; |
| if (isValid(fScrollbar)) |
| fScrollbar.removeSelectionListener(this); |
| if (isValid(fTable)) |
| fTable.removeFocusListener(this); |
| } |
| |
| @Override |
| public void widgetSelected(SelectionEvent e) { |
| fScrollbarClicked= true; |
| } |
| |
| @Override |
| public void widgetDefaultSelected(SelectionEvent e) { |
| fScrollbarClicked= true; |
| } |
| |
| @Override |
| public void focusGained(FocusEvent e) { |
| } |
| |
| @Override |
| public void focusLost(final FocusEvent e) { |
| fScrollbarClicked= false; |
| Display d= fTable.getDisplay(); |
| d.asyncExec(() -> { |
| if (isValid(fTable) && !fTable.isFocusControl() && !fScrollbarClicked && fContentAssistant != null) |
| fContentAssistant.popupFocusLost(e); |
| }); |
| } |
| |
| @Override |
| public void shellDeactivated(ShellEvent e) { |
| if (fContentAssistant != null) |
| fContentAssistant.hide(); |
| } |
| |
| |
| @Override |
| public void shellClosed(ShellEvent e) { |
| if (fContentAssistant != null) |
| fContentAssistant.hide(); |
| } |
| } |