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Diffstat (limited to 'awt/java/awt/HeadlessGraphicsEnvironment.java')
-rw-r--r-- | awt/java/awt/HeadlessGraphicsEnvironment.java | 72 |
1 files changed, 72 insertions, 0 deletions
diff --git a/awt/java/awt/HeadlessGraphicsEnvironment.java b/awt/java/awt/HeadlessGraphicsEnvironment.java new file mode 100644 index 0000000..306393f --- /dev/null +++ b/awt/java/awt/HeadlessGraphicsEnvironment.java @@ -0,0 +1,72 @@ +/* + * 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. + */ + +package java.awt; + +import java.awt.GraphicsDevice; +import java.awt.HeadlessException; + +import org.apache.harmony.awt.gl.CommonGraphicsEnvironment; + +/** + * The HeadlessGraphicsEnvironment class is the CommonGraphicsEnvironment + * implementation to use in the case where the environment lacks display, + * keyboard, and mouse support. + * + * @since Android 1.0 + */ +public class HeadlessGraphicsEnvironment extends CommonGraphicsEnvironment { + + /** + * 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. + */ + @Override + public boolean isHeadlessInstance() { + return true; + } + + /** + * Gets the default screen device as GraphicDevice object. + * + * @return the GraphicDevice object which represents default screen device. + * @throws HeadlessException + * if isHeadless() returns true. + */ + @Override + public GraphicsDevice getDefaultScreenDevice() throws HeadlessException { + throw new 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. + */ + @Override + public GraphicsDevice[] getScreenDevices() throws HeadlessException { + throw new HeadlessException(); + } + +} |