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/*******************************************************************************
* Copyright (c) 2001, 2004 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
* Jens Lukowski/Innoopract - initial renaming/restructuring
*
*******************************************************************************/
package org.eclipse.wst.sse.ui.internal.util;
import org.eclipse.swt.custom.StyledText;
import org.eclipse.swt.custom.VerifyKeyListener;
import org.eclipse.swt.events.FocusAdapter;
import org.eclipse.swt.events.FocusEvent;
import org.eclipse.swt.events.MouseEvent;
import org.eclipse.swt.events.MouseListener;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.events.SelectionListener;
import org.eclipse.swt.events.VerifyEvent;
import org.eclipse.swt.widgets.Control;
import org.eclipse.ui.IEditorPart;
import org.eclipse.ui.IWorkbenchPage;
import org.eclipse.ui.IWorkbenchWindow;
import org.eclipse.ui.PlatformUI;
/**
* Utility to display (and/or clear) messages on the status line.
*
* @author pavery
*/
public class PlatformStatusLineUtil {
private static class ClearErrorMessage implements Runnable {
public void run() {
displayMessage(null);
}
}
/**
* Used to clear message on focus loss, change of selection, key type,
* etc...
*/
private static class OneTimeListener extends FocusAdapter implements VerifyKeyListener, SelectionListener, MouseListener {
private Runnable fRunner = null;
private StyledText fStyledText;
public OneTimeListener(StyledText target, Runnable r) {
fStyledText = target;
fRunner = r;
fStyledText.addVerifyKeyListener(this);
fStyledText.addFocusListener(this);
fStyledText.addSelectionListener(this);
fStyledText.addMouseListener(this);
}
public void focusLost(FocusEvent e) {
unhookAndRun();
}
public void mouseDoubleClick(MouseEvent e) {
unhookAndRun();
}
public void mouseDown(MouseEvent e) {
unhookAndRun();
}
public void mouseUp(MouseEvent e) {
//
}
private void unhookAndRun() {
fStyledText.removeVerifyKeyListener(this);
fStyledText.removeFocusListener(this);
fStyledText.removeSelectionListener(this);
fStyledText.removeMouseListener(this);
fStyledText.getDisplay().asyncExec(fRunner);
}
public void verifyKey(VerifyEvent event) {
unhookAndRun();
}
public void widgetDefaultSelected(SelectionEvent e) {
unhookAndRun();
}
public void widgetSelected(SelectionEvent e) {
unhookAndRun();
}
}
/**
* Status line will be cleared w/ key type, or selection change
*
* @param widget
*/
public static void addOneTimeClearListener() {
IEditorPart editor = getActiveEditor();
boolean added = false;
if (editor != null) {
Control control = (Control) editor.getAdapter(Control.class);
if (control instanceof StyledText) {
addOneTimeClearListener(((StyledText) control));
added = true;
}
}
if (!added) {
// clear the error message immediately
displayMessage(null);
}
}
private static void addOneTimeClearListener(StyledText widget) {
new OneTimeListener(widget, new ClearErrorMessage());
}
/**
* Clears the status line immediately
*/
public static void clearStatusLine() {
displayMessage(null);
}
/**
* Display a message on the status line (with a beep)
*
* @param msg
*/
public static void displayErrorMessage(String msg) {
displayMessage(msg);
PlatformUI.getWorkbench().getDisplay().beep();
}
/**
* Display a message on the status line (no beep)
*
* @param msg
*/
public static void displayMessage(String msg) {
IEditorPart editor = getActiveEditor();
if (editor != null) {
editor.getEditorSite().getActionBars().getStatusLineManager().setErrorMessage(msg);
}
}
private static IEditorPart getActiveEditor() {
IEditorPart editor = null;
IWorkbenchWindow window = PlatformUI.getWorkbench().getActiveWorkbenchWindow();
if (window == null) {
window = PlatformUI.getWorkbench().getActiveWorkbenchWindow();
}
if (window != null) {
IWorkbenchPage page = window.getActivePage();
if (page != null)
editor = page.getActiveEditor();
}
return editor;
}
private PlatformStatusLineUtil() {
// force use of singleton
}
}
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