replicant-frameworks_native/awt/java/awt/image/ImageObserver.java
2009-03-03 19:31:44 -08:00

102 lines
3.1 KiB
Java

/*
* 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 Igor V. Stolyarov
* @version $Revision$
*/
package java.awt.image;
import java.awt.Image;
/**
* the ImageObserver interface is an asynchronous update interface for receiving
* notifications about Image construction status.
*
* @since Android 1.0
*/
public interface ImageObserver {
/**
* The Constant WIDTH indicates that the width of the image is available.
*/
public static final int WIDTH = 1;
/**
* The Constant HEIGHT indicates that the width of the image is available.
*/
public static final int HEIGHT = 2;
/**
* The Constant PROPERTIES indicates that the properties of the image are
* available.
*/
public static final int PROPERTIES = 4;
/**
* The Constant SOMEBITS indicates that more bits needed for drawing a
* scaled variation of the image pixels are available.
*/
public static final int SOMEBITS = 8;
/**
* The Constant FRAMEBITS indicates that complete frame of a image which was
* previously drawn is now available for drawing again.
*/
public static final int FRAMEBITS = 16;
/**
* The Constant ALLBITS indicates that an image which was previously drawn
* is now complete and can be drawn again.
*/
public static final int ALLBITS = 32;
/**
* The Constant ERROR indicates that error occurred.
*/
public static final int ERROR = 64;
/**
* The Constant ABORT indicates that the image producing is aborted.
*/
public static final int ABORT = 128;
/**
* This method is called when information about an Image interface becomes
* available. This method returns true if further updates are needed, false
* if not.
*
* @param img
* the image to be observed.
* @param infoflags
* the bitwise OR combination of information flags: ABORT,
* ALLBITS, ERROR, FRAMEBITS, HEIGHT, PROPERTIES, SOMEBITS,
* WIDTH.
* @param x
* the X coordinate.
* @param y
* the Y coordinate.
* @param width
* the width.
* @param height
* the height.
* @return true if further updates are needed, false if not.
*/
public boolean imageUpdate(Image img, int infoflags, int x, int y, int width, int height);
}