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/*******************************************************************************
* Copyright (c) 2000, 2018 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
*
* Contributors:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.jface.internal.text.link.contentassist;
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 (Helper2.okToUse(fTable)) {
Shell shell= fTable.getShell();
if (Helper2.okToUse(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 (Helper2.okToUse(fShell))
fShell.removeShellListener(this);
fShell= null;
if (Helper2.okToUse(fScrollbar))
fScrollbar.removeSelectionListener(this);
if (Helper2.okToUse(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 (Helper2.okToUse(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();
}
}
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