102 lines
3.1 KiB
Java
102 lines
3.1 KiB
Java
/*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership.
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* The ASF licenses this file to You under the Apache License, Version 2.0
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* (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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/**
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* @author Igor V. Stolyarov
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* @version $Revision$
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*/
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package java.awt.image;
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import java.awt.Image;
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/**
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* the ImageObserver interface is an asynchronous update interface for receiving
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* notifications about Image construction status.
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*
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* @since Android 1.0
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*/
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public interface ImageObserver {
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/**
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* The Constant WIDTH indicates that the width of the image is available.
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*/
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public static final int WIDTH = 1;
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/**
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* The Constant HEIGHT indicates that the width of the image is available.
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*/
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public static final int HEIGHT = 2;
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/**
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* The Constant PROPERTIES indicates that the properties of the image are
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* available.
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*/
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public static final int PROPERTIES = 4;
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/**
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* The Constant SOMEBITS indicates that more bits needed for drawing a
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* scaled variation of the image pixels are available.
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*/
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public static final int SOMEBITS = 8;
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/**
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* The Constant FRAMEBITS indicates that complete frame of a image which was
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* previously drawn is now available for drawing again.
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*/
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public static final int FRAMEBITS = 16;
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/**
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* The Constant ALLBITS indicates that an image which was previously drawn
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* is now complete and can be drawn again.
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*/
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public static final int ALLBITS = 32;
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/**
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* The Constant ERROR indicates that error occurred.
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*/
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public static final int ERROR = 64;
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/**
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* The Constant ABORT indicates that the image producing is aborted.
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*/
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public static final int ABORT = 128;
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/**
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* This method is called when information about an Image interface becomes
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* available. This method returns true if further updates are needed, false
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* if not.
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*
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* @param img
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* the image to be observed.
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* @param infoflags
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* the bitwise OR combination of information flags: ABORT,
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* ALLBITS, ERROR, FRAMEBITS, HEIGHT, PROPERTIES, SOMEBITS,
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* WIDTH.
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* @param x
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* the X coordinate.
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* @param y
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* the Y coordinate.
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* @param width
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* the width.
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* @param height
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* the height.
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* @return true if further updates are needed, false if not.
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*/
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public boolean imageUpdate(Image img, int infoflags, int x, int y, int width, int height);
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}
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