/*******************************************************************************
* Copyright (c) 2009 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.swt.snippets;
/*
* Spinner example snippet: validate input in a spinner widget
*
* 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.events.*;
import org.eclipse.swt.graphics.*;
import org.eclipse.swt.layout.*;
import org.eclipse.swt.widgets.*;
public class Snippet310 {
public static void main (String[] args) {
final Display display = new Display();
final Shell shell = new Shell(display);
shell.setLayout(new GridLayout());
final Spinner spinner = new Spinner (shell, SWT.BORDER);
spinner.setValues(0, -100, 100, 0, 1, 10);
spinner.setLayoutData(new GridData(200, SWT.DEFAULT));
final ToolTip toolTip = new ToolTip(shell, SWT.BALLOON | SWT.ICON_WARNING);
spinner.addModifyListener(new ModifyListener() {
@Override
public void modifyText(ModifyEvent e) {
String string = spinner.getText();
String message = null;
try {
int value = Integer.parseInt(string);
int maximum = spinner.getMaximum();
int minimum = spinner.getMinimum();
if (value > maximum) {
message = "Current input is greater than the maximum limit ("+maximum+")";
} else if (value < minimum) {
message = "Current input is less than the minimum limit ("+minimum+")";
}
} catch (Exception ex) {
message = "Current input is not numeric";
}
if (message != null) {
spinner.setForeground(display.getSystemColor(SWT.COLOR_RED));
Rectangle rect = spinner.getBounds();
GC gc = new GC(spinner);
Point pt = gc.textExtent(string);
gc.dispose();
toolTip.setLocation(display.map(shell, null, rect.x + pt.x, rect.y + rect.height));
toolTip.setMessage(message);
toolTip.setVisible(true);
} else {
toolTip.setVisible(false);
spinner.setForeground(null);
}
}
});
shell.setSize(300, 100);
shell.open();
while (!shell.isDisposed()) {
if (!display.readAndDispatch()) {
display.sleep();
}
}
display.dispose();
}
}