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/*******************************************************************************
* Copyright (c) 2009, 2021 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.swt.snippets;
/*
* Shell example snippet: use shell modified state to prompt for save
*
* For a list of all SWT example snippets see
* http://www.eclipse.org/swt/snippets/
*
* @since 3.5
*/
import org.eclipse.swt.*;
import org.eclipse.swt.layout.*;
import org.eclipse.swt.widgets.*;
public class Snippet314 {
public static void main(String[] args) {
Display display = new Display();
final Shell shell = new Shell(display);
shell.setText ("Text Editor");
Menu bar = new Menu (shell, SWT.BAR);
shell.setMenuBar (bar);
MenuItem fileItem = new MenuItem (bar, SWT.CASCADE);
fileItem.setText ("&File");
Menu fileMenu = new Menu (shell, SWT.DROP_DOWN);
fileItem.setMenu (fileMenu);
MenuItem saveItem = new MenuItem (fileMenu, SWT.PUSH);
saveItem.setText ("&Save\tCtrl+S");
saveItem.setAccelerator (SWT.MOD1 + 'S');
saveItem.addListener (SWT.Selection, e -> {
shell.setModified (false);
// Update Shell title, to hint that it's not in modified state.
if(shell.getText().startsWith("*")) {
shell.setText (shell.getText().substring(1));
}
});
MenuItem exitItem = new MenuItem (fileMenu, SWT.PUSH);
exitItem.setText ("Exit");
exitItem.addListener (SWT.Selection, e -> shell.close ());
Text text = new Text (shell, SWT.H_SCROLL | SWT.V_SCROLL | SWT.BORDER);
text.addListener (SWT.Modify, e -> {
shell.setModified (true);
// Update Shell title, to hint that it's in modified state.
if(!shell.getText().startsWith("*")) {
shell.setText ("*" + shell.getText());
}
});
shell.addListener (SWT.Close, e -> {
if (shell.getModified()) {
MessageBox box = new MessageBox (shell, SWT.PRIMARY_MODAL | SWT.OK | SWT.CANCEL);
box.setText (shell.getText ());
box.setMessage ("You have unsaved changes, do you want to exit?");
e.doit = box.open () == SWT.OK;
}
});
shell.setLayout (new FillLayout());
shell.open ();
while (!shell.isDisposed ()) {
if (!display.readAndDispatch ())
display.sleep ();
}
display.dispose ();
}
}
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