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/*******************************************************************************
* Copyright (c) 2000, 2003 IBM Corporation and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Common Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/cpl-v10.html
*
* Contributors:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.jface.text.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.widgets.Display;
import org.eclipse.swt.widgets.ScrollBar;
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 PopupCloser implements FocusListener, SelectionListener {
/** The content assistant to be monitored */
private ContentAssistant 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 grabed */
private boolean fScrollbarClicked= false;
/**
* 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(ContentAssistant contentAssistant, Table table) {
fContentAssistant= contentAssistant;
fTable= table;
if (Helper.okToUse(fTable)) {
fTable.addFocusListener(this);
fScrollbar= fTable.getVerticalBar();
if (fScrollbar != null)
fScrollbar.addSelectionListener(this);
}
}
/**
* Uninstalls this closer if previously installed.
*/
public void uninstall() {
if (Helper.okToUse(fScrollbar))
fScrollbar.removeSelectionListener(this);
if (Helper.okToUse(fTable))
fTable.removeFocusListener(this);
}
/*
* @see org.eclipse.swt.events.SelectionListener#widgetSelected(org.eclipse.swt.events.SelectionEvent)
*/
public void widgetSelected(SelectionEvent e) {
fScrollbarClicked= true;
}
/*
* @see org.eclipse.swt.events.SelectionListener#widgetDefaultSelected(org.eclipse.swt.events.SelectionEvent)
*/
public void widgetDefaultSelected(SelectionEvent e) {
fScrollbarClicked= true;
}
/*
* @see org.eclipse.swt.events.FocusListener#focusGained(org.eclipse.swt.events.FocusEvent)
*/
public void focusGained(FocusEvent e) {
}
/*
* @see org.eclipse.swt.events.FocusListener#focusLost(org.eclipse.swt.events.FocusEvent)
*/
public void focusLost(final FocusEvent e) {
fScrollbarClicked= false;
Display d= fTable.getDisplay();
d.asyncExec(new Runnable() {
public void run() {
if (Helper.okToUse(fTable) && !fTable.isFocusControl() && !fScrollbarClicked)
fContentAssistant.popupFocusLost(e);
}
});
}
}
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