| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You under the Apache License, Version 2.0 |
| * (the "License"); you may not use this file except in compliance with |
| * the License. You may obtain a copy of the License 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 License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| /** |
| * @author Oleg V. Khaschansky |
| * @version $Revision$ |
| */ |
| |
| package java.awt; |
| |
| import java.awt.image.BufferedImage; |
| import java.util.Locale; |
| |
| import org.apache.harmony.awt.ContextStorage; |
| import org.apache.harmony.awt.gl.CommonGraphics2DFactory; |
| |
| /** |
| * The GraphicsEnvironment class defines a collection of GraphicsDevice objects |
| * and Font objects which are available for Java application on current |
| * platform. |
| * |
| * @since Android 1.0 |
| */ |
| public abstract class GraphicsEnvironment { |
| |
| /** |
| * Constructor could not be used directly and should be obtained in extended |
| * classes. |
| */ |
| protected GraphicsEnvironment() { |
| } |
| |
| /** |
| * Gets the local GraphicsEnvironment. |
| * |
| * @return the local GraphicsEnvironment. |
| */ |
| public static GraphicsEnvironment getLocalGraphicsEnvironment() { |
| synchronized (ContextStorage.getContextLock()) { |
| if (ContextStorage.getGraphicsEnvironment() == null) { |
| if (isHeadless()) { |
| ContextStorage.setGraphicsEnvironment(new HeadlessGraphicsEnvironment()); |
| } else { |
| CommonGraphics2DFactory g2df = (CommonGraphics2DFactory)Toolkit |
| .getDefaultToolkit().getGraphicsFactory(); |
| |
| ContextStorage.setGraphicsEnvironment(g2df |
| .createGraphicsEnvironment(ContextStorage.getWindowFactory())); |
| } |
| } |
| |
| return ContextStorage.getGraphicsEnvironment(); |
| } |
| } |
| |
| /** |
| * Returns whether or not a display, keyboard, and mouse are supported in |
| * this graphics environment. |
| * |
| * @return true, if HeadlessException will be thrown from areas of the |
| * graphics environment that are dependent on a display, keyboard, |
| * or mouse, false otherwise. |
| */ |
| public boolean isHeadlessInstance() { |
| return false; |
| } |
| |
| /** |
| * Checks whether or not a display, keyboard, and mouse are supported in |
| * this environment. |
| * |
| * @return true, if a HeadlessException is thrown from areas of the Toolkit |
| * and GraphicsEnvironment that are dependent on a display, |
| * keyboard, or mouse, false otherwise. |
| */ |
| public static boolean isHeadless() { |
| return "true".equals(System.getProperty("java.awt.headless")); |
| } |
| |
| /** |
| * Gets the maximum bounds of system centered windows. |
| * |
| * @return the maximum bounds of system centered windows. |
| * @throws HeadlessException |
| * if isHeadless() method returns true. |
| */ |
| public Rectangle getMaximumWindowBounds() throws HeadlessException { |
| return getDefaultScreenDevice().getDefaultConfiguration().getBounds(); |
| } |
| |
| /** |
| * Gets the Point which should defines the center of system window. |
| * |
| * @return the Point where the system window should be centered. |
| * @throws HeadlessException |
| * if isHeadless() method returns true. |
| */ |
| public Point getCenterPoint() throws HeadlessException { |
| Rectangle mwb = getMaximumWindowBounds(); |
| return new Point(mwb.width >> 1, mwb.height >> 1); |
| } |
| |
| /** |
| * Indicates that the primary font should be used. Primary font is specified |
| * by initial system locale or default encoding). |
| */ |
| public void preferLocaleFonts() { |
| // Note: API specification says following: |
| // "The actual change in font rendering behavior resulting |
| // from a call to this method is implementation dependent; |
| // it may have no effect at all." So, doing nothing is an |
| // acceptable behavior for this method. |
| |
| // For now FontManager uses 1.4 font.properties scheme for font mapping, |
| // so |
| // this method doesn't make any sense. The implementation of this method |
| // which will influence font mapping is postponed until |
| // 1.5 mapping scheme not implemented. |
| |
| // todo - Implement non-default behavior with 1.5 font mapping scheme |
| } |
| |
| /** |
| * Indicates that a proportional preference of the font should be used. |
| */ |
| public void preferProportionalFonts() { |
| // Note: API specification says following: |
| // "The actual change in font rendering behavior resulting |
| // from a call to this method is implementation dependent; |
| // it may have no effect at all." So, doing nothing is an |
| // acceptable behavior for this method. |
| |
| // For now FontManager uses 1.4 font.properties scheme for font mapping, |
| // so |
| // this method doesn't make any sense. The implementation of this method |
| // which will influence font mapping is postponed until |
| // 1.5 mapping scheme not implemented. |
| |
| // todo - Implement non-default behavior with 1.5 font mapping scheme |
| } |
| |
| /** |
| * Creates the Graphics2D object for rendering to the specified |
| * BufferedImage. |
| * |
| * @param bufferedImage |
| * the BufferedImage object. |
| * @return the Graphics2D object which allows to render to the specified |
| * BufferedImage. |
| */ |
| public abstract Graphics2D createGraphics(BufferedImage bufferedImage); |
| |
| /** |
| * Gets the array of all available fonts instances in this |
| * GraphicsEnviroments. |
| * |
| * @return the array of all available fonts instances in this |
| * GraphicsEnviroments. |
| */ |
| public abstract Font[] getAllFonts(); |
| |
| /** |
| * Gets the array of all available font family names. |
| * |
| * @return the array of all available font family names. |
| */ |
| public abstract String[] getAvailableFontFamilyNames(); |
| |
| /** |
| * Gets the array of all available font family names for the specified |
| * locale. |
| * |
| * @param locale |
| * the Locale object which represents geographical region. The |
| * default locale is used if locale is null. |
| * @return the array of available font family names for the specified |
| * locale. |
| */ |
| public abstract String[] getAvailableFontFamilyNames(Locale locale); |
| |
| /** |
| * Gets the default screen device as GraphicDevice object. |
| * |
| * @return the GraphicDevice object which represents default screen device. |
| * @throws HeadlessException |
| * if isHeadless() returns true. |
| */ |
| public abstract GraphicsDevice getDefaultScreenDevice() throws HeadlessException; |
| |
| /** |
| * Gets an array of all available screen devices. |
| * |
| * @return the array of GraphicsDevice objects which represents all |
| * available screen devices. |
| * @throws HeadlessException |
| * if isHeadless() returns true. |
| */ |
| public abstract GraphicsDevice[] getScreenDevices() throws HeadlessException; |
| } |