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/*******************************************************************************
* Copyright (c) 2000, 2005 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;
/*
* TextLayout example snippet: using the rise field of a TextStyle.
*
* For a list of all SWT example snippets see
* http://www.eclipse.org/swt/snippets/
*
* @since 3.2
*/
import org.eclipse.swt.SWT;
import org.eclipse.swt.graphics.Font;
import org.eclipse.swt.graphics.FontData;
import org.eclipse.swt.graphics.FontMetrics;
import org.eclipse.swt.graphics.GC;
import org.eclipse.swt.graphics.Rectangle;
import org.eclipse.swt.graphics.TextLayout;
import org.eclipse.swt.graphics.TextStyle;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Event;
import org.eclipse.swt.widgets.Listener;
import org.eclipse.swt.widgets.Shell;
public class TextLayoutSubscriptSuperscript {
public static void main(String[] args) {
Display display = new Display();
Shell shell = new Shell(display, SWT.SHELL_TRIM | SWT.DOUBLE_BUFFERED);
shell.setText("Modify Rise");
FontData data = display.getSystemFont().getFontData()[0];
Font font = new Font(display, data.getName(), 24, SWT.NORMAL);
Font smallFont = new Font(display, data.getName(), 8, SWT.NORMAL);
GC gc = new GC(shell);
gc.setFont(smallFont);
FontMetrics smallMetrics = gc.getFontMetrics();
final int smallBaseline = smallMetrics.getAscent() + smallMetrics.getLeading();
gc.setFont(font);
FontMetrics metrics = gc.getFontMetrics();
final int baseline = metrics.getAscent() + metrics.getLeading();
gc.dispose();
final TextLayout layout0 = new TextLayout(display);
layout0.setText("SubscriptScriptSuperscript");
layout0.setFont(font);
TextStyle subscript0 = new TextStyle(smallFont, null, null);
TextStyle superscript0 = new TextStyle(smallFont, null, null);
superscript0.rise = baseline - smallBaseline;
layout0.setStyle(subscript0, 0, 8);
layout0.setStyle(superscript0, 15, 25);
final TextLayout layout1 = new TextLayout(display);
layout1.setText("SubscriptScriptSuperscript");
layout1.setFont(font);
TextStyle subscript1 = new TextStyle(smallFont, null, null);
subscript1.rise = -smallBaseline;
TextStyle superscript1 = new TextStyle(smallFont, null, null);
superscript1.rise = baseline;
layout1.setStyle(subscript1, 0, 8);
layout1.setStyle(superscript1, 15, 25);
shell.addListener(SWT.Paint, new Listener() {
public void handleEvent(Event event) {
Display display = event.display;
GC gc = event.gc;
Rectangle rect0 = layout0.getBounds();
rect0.x += 10;
rect0.y += 10;
gc.setBackground(display.getSystemColor(SWT.COLOR_WHITE));
gc.setForeground(display.getSystemColor(SWT.COLOR_BLACK));
gc.fillRectangle(rect0);
layout0.draw(gc, rect0.x, rect0.y);
gc.setForeground(display.getSystemColor(SWT.COLOR_MAGENTA));
gc.drawLine(rect0.x, rect0.y, rect0.x + rect0.width, rect0.y);
gc.drawLine(rect0.x, rect0.y + baseline, rect0.x + rect0.width, rect0.y + baseline);
gc.drawLine(rect0.x + rect0.width / 2, rect0.y, rect0.x + rect0.width / 2, rect0.y
+ rect0.height);
Rectangle rect1 = layout1.getBounds();
rect1.x += 10;
rect1.y += 20 + rect0.height;
gc.setBackground(display.getSystemColor(SWT.COLOR_WHITE));
gc.setForeground(display.getSystemColor(SWT.COLOR_BLACK));
gc.fillRectangle(rect1);
layout1.draw(gc, rect1.x, rect1.y);
gc.setForeground(display.getSystemColor(SWT.COLOR_MAGENTA));
gc.drawLine(rect1.x, rect1.y + smallBaseline, rect1.x + rect1.width, rect1.y
+ smallBaseline);
gc.drawLine(rect1.x, rect1.y + baseline + smallBaseline, rect1.x + rect1.width, rect1.y
+ baseline + smallBaseline);
gc.drawLine(rect1.x + rect1.width / 2, rect1.y, rect1.x + rect1.width / 2, rect1.y
+ rect1.height);
}
});
shell.open();
while (!shell.isDisposed()) {
if (!display.readAndDispatch())
display.sleep();
}
layout0.dispose();
layout1.dispose();
smallFont.dispose();
font.dispose();
display.dispose();
}
}
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