SpecialCharacterView.java

/**************************************************************************************************
 * Copyright (c) 2010 Fabian Steeg. 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
 * <p/>
 * Contributors: Mihail Atanassov - initial API and implementation
 *************************************************************************************************/
package de.uni_koeln.ub.drc.ui.views;

import org.eclipse.swt.SWT;
import org.eclipse.swt.custom.ScrolledComposite;
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.layout.RowData;
import org.eclipse.swt.layout.RowLayout;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Text;
import org.eclipse.ui.part.ViewPart;

import de.uni_koeln.ub.drc.ui.facades.CSSSWTConstantsHelper;

/**
 * A view representing special characters.
 * 
 * @author Mihail Atanassov (matana)
 */
public class SpecialCharacterView extends ViewPart {
	/**
	 * The class / SpecialCharacterView ID
	 */
	public static final String ID = SpecialCharacterView.class.getName()
			.toLowerCase();

	private Text text;
	private static final char[] SC = new char[] { /* A */'\u00C0', '\u00E0',
			'\u00C1', '\u00E1', '\u00C2', '\u00E2', '\u00C3', '\u00E3',
			'\u00C4', '\u00E4', '\u00C6', '\u00E6', '\u1EA0', '\u1EA1', /* E */
			'\u00C8', '\u00E8', '\u00C9', '\u00E9', '\u00CA', '\u00EA',
			'\u00CB', '\u00EB', '\u1EBC', '\u1EBD', '\u0113', /* I */'\u00CC',
			'\u00EC', '\u00CD', '\u00ED', '\u00CE', '\u00EE', '\u00CF',
			'\u00EF', '\u0128', '\u0129', '\u012A', '\u012B', '\u0130', /* O */
			'\u00D2', '\u00F2', '\u00D3', '\u00F3', '\u00D4', '\u00F4',
			'\u00D5', '\u00F5', '\u00D6', '\u00F6', '\u014C', '\u014D',
			'\u0152', '\u0153', /* U */'\u00D9', '\u00F9', '\u00DA', '\u00FA',
			'\u00DB', '\u00FB', '\u00DC', '\u00FC', '\u0168', '\u0169',
			'\u016A', '\u016B', /* N */
			'\u00D1', '\u00F1', /* long S '\u017F' */};

	@Override
	public void createPartControl(Composite parent) {
		ScrolledComposite scrolledComposite = new ScrolledComposite(parent,
				SWT.V_SCROLL | SWT.BORDER);
		Composite specialCharacterComposite = new Composite(scrolledComposite,
				SWT.NONE);
		scrolledComposite.setContent(specialCharacterComposite);
		scrolledComposite.setExpandVertical(true);
		scrolledComposite.setExpandHorizontal(true);
		RowLayout rowLayout = new RowLayout(SWT.HORIZONTAL);
		rowLayout.spacing = 5;
		rowLayout.pack = true;
		specialCharacterComposite.setLayout(rowLayout);
		initSCButtons(specialCharacterComposite);
		scrolledComposite.setMinSize(specialCharacterComposite.computeSize(
				SWT.MIN, SWT.DEFAULT));
	}

	@Override
	public void setFocus() {
	}

	private void initSCButtons(final Composite specialCharacterComposite) {
		for (int i = 0; i < SC.length; i++) {
			final Button button = new Button(specialCharacterComposite,
					SWT.PUSH | SWT.FLAT);
			RowData rowData = new RowData(30, 30);
			button.setLayoutData(rowData);
			button.setData(CSSSWTConstantsHelper.getCSS(), "specialCharacter"); //$NON-NLS-1$
			button.setText("" + SC[i]); //$NON-NLS-1$
			button.addSelectionListener(new SelectionListener() {

				@Override
				public void widgetSelected(SelectionEvent e) {
					insert(button.getText());
				}

				private void insert(final String character) {
					if (text != null && !text.isDisposed()) {
						int pos = text.getCaretPosition();
						text.insert(character);
						text.setSelection(pos + 1);
						text.setFocus();
					}
				}

				@Override
				public void widgetDefaultSelected(SelectionEvent e) {
				}
			});
		}
	}

	protected static class TextFocusListener implements FocusListener {

		public Text text;

		public TextFocusListener(final Text text) {
			this.text = text;
		}

		@Override
		public void focusGained(FocusEvent e) {
		}

		@Override
		public void focusLost(FocusEvent e) {
		}
	}

	/**
	 * @param text
	 *            The selected text widget
	 */
	public void setText(final Text text) {
		this.text = text;
	}

}