org.microemu.device.swt.SwtSystemFont Maven / Gradle / Ivy
/*
* MicroEmulator
* Copyright (C) 2006 Bartek Teodorczyk
*
* It is licensed under the following two licenses as alternatives:
* 1. GNU Lesser General Public License (the "LGPL") version 2.1 or any newer version
* 2. Apache License (the "AL") Version 2.0
*
* You may not use this file except in compliance with at least one of
* the above two licenses.
*
* You may obtain a copy of the LGPL at
* http://www.gnu.org/licenses/old-licenses/lgpl-2.1.txt
*
* You may obtain a copy of the AL at
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the LGPL or the AL for the specific language governing permissions and
* limitations.
*/
package org.microemu.device.swt;
import org.eclipse.swt.SWT;
import org.eclipse.swt.graphics.Font;
import org.microemu.app.ui.swt.SwtDeviceComponent;
public class SwtSystemFont implements SwtFont {
private String name;
private String style;
private int size;
private boolean antialiasing;
private boolean initialized;
private Font font;
public SwtSystemFont(String name, String style, int size, boolean antialiasing) {
this.name = name;
this.style = style.toLowerCase();
this.size = size;
this.antialiasing = antialiasing;
this.initialized = false;
}
public void setAntialiasing(boolean antialiasing) {
if (this.antialiasing != antialiasing) {
this.antialiasing = antialiasing;
initialized = false;
}
}
public Font getFont() {
checkInitialized();
return font;
}
private synchronized void checkInitialized() {
if (!initialized) {
int swtStyle = 0;
if (style.indexOf("plain") != -1) {
swtStyle |= SWT.NORMAL;
}
if (style.indexOf("bold") != -1) {
swtStyle |= SWT.BOLD;
}
if (style.indexOf("italic") != -1) {
swtStyle |= SWT.ITALIC;
}
if (style.indexOf("underlined") != -1) {
// TODO underlined style not implemented
}
font = SwtDeviceComponent.getFont(name, size, swtStyle, antialiasing);
initialized = true;
}
}
public int charWidth(char ch) {
return charsWidth(new char[] {ch}, 0, 1);
}
public int charsWidth(char[] ch, int offset, int length) {
checkInitialized();
return SwtDeviceComponent.stringWidth(font, new String(ch, offset, length));
}
public int getBaselinePosition() {
checkInitialized();
return SwtDeviceComponent.getFontMetrics(font).getAscent();
}
public int getHeight() {
checkInitialized();
return SwtDeviceComponent.getFontMetrics(font).getHeight();
}
public int stringWidth(String str) {
checkInitialized();
return SwtDeviceComponent.stringWidth(font, str);
}
}