SnippetTextRidget002.java

/*******************************************************************************
 * Copyright (c) 2007, 2014 compeople AG 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:
 *    compeople AG - initial API and implementation
 *******************************************************************************/
package org.eclipse.riena.sample.snippets;

import org.eclipse.core.databinding.validation.IValidator;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.jface.layout.GridDataFactory;
import org.eclipse.jface.layout.GridLayoutFactory;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.swt.widgets.Text;

import org.eclipse.riena.ui.core.marker.ErrorMessageMarker;
import org.eclipse.riena.ui.core.marker.ValidationTime;
import org.eclipse.riena.ui.ridgets.ITextRidget;
import org.eclipse.riena.ui.ridgets.marker.TooltipMessageMarkerViewer;
import org.eclipse.riena.ui.ridgets.swt.SwtRidgetFactory;
import org.eclipse.riena.ui.ridgets.validation.ValidationRuleStatus;
import org.eclipse.riena.ui.swt.utils.UIControlsFactory;

/**
 * Text ridgets using a {@link TooltipMessageMarkerViewer} for showing error
 * messages in their tooltip.
 */
public final class SnippetTextRidget002 {

	public static void main(final String[] args) {
		final Display display = Display.getDefault();
		try {
			final Shell shell = new Shell();
			GridLayoutFactory.fillDefaults().numColumns(1).margins(10, 10).spacing(20, 10).applyTo(shell);

			// #1 Showing error message returned by AlwaysWrongValidator
			final Text text0 = UIControlsFactory.createText(shell);
			GridDataFactory.fillDefaults().grab(true, false).applyTo(text0);
			final ITextRidget textRidget0 = (ITextRidget) SwtRidgetFactory.createRidget(text0);
			textRidget0.addValidationRule(new AlwaysWrongValidator(), ValidationTime.ON_UI_CONTROL_EDIT);
			textRidget0.setText("Hover over this..."); //$NON-NLS-1$

			// #2 Showing error message from an ErrorMessageMarker. 
			final Text text1 = UIControlsFactory.createText(shell);
			GridDataFactory.fillDefaults().grab(true, false).applyTo(text1);
			final ITextRidget textRidget1 = (ITextRidget) SwtRidgetFactory.createRidget(text1);
			textRidget1.setText("Hover over this..."); //$NON-NLS-1$
			textRidget1.addMarker(new ErrorMessageMarker("Brought to you by an ErrorMessageMarker")); //$NON-NLS-1$

			// #3 Showing error message via addValidationMessage(...)
			final Text text2 = UIControlsFactory.createText(shell);
			GridDataFactory.fillDefaults().grab(true, false).applyTo(text2);
			final ITextRidget textRidget2 = (ITextRidget) SwtRidgetFactory.createRidget(text2);
			final IValidator alwaysWrong = new AlwaysWrongValidator();
			textRidget2.addValidationMessage("Brought to you by a ValidationMessage", alwaysWrong); //$NON-NLS-1$
			textRidget2.addValidationRule(alwaysWrong, ValidationTime.ON_UI_CONTROL_EDIT);
			textRidget2.setText("Hover over this..."); //$NON-NLS-1$

			final TooltipMessageMarkerViewer messageViewer = new TooltipMessageMarkerViewer();
			messageViewer.addRidget(textRidget0);
			messageViewer.addRidget(textRidget1);
			messageViewer.addRidget(textRidget2);

			shell.setSize(200, 200);
			shell.open();
			while (!shell.isDisposed()) {
				if (!display.readAndDispatch()) {
					display.sleep();
				}
			}
		} finally {
			display.dispose();
		}
	}

	// helping classes
	// ////////////////

	/**
	 * Validator that always returns an error status.
	 */
	private static final class AlwaysWrongValidator implements IValidator {
		public IStatus validate(final Object value) {
			return ValidationRuleStatus.error(false, "This comes from the IStatus returned by the validator"); //$NON-NLS-1$
		}

	}
}