deferredplanarimage.html

Geotools是一个开源的Java GIS工具包,可利用它来开发符合标准的地理信息系统。Geotools提供了OGC(Open Geospatial Consortium)规范的一个实现来作为他们的

 a notification will be sent later through <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/awt/image/TileObserver.html" title="class or interface in java.awt.image"><CODE>TileObserver</CODE></A> when the real tile will
 be available.
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="http://java.sun.com/j2se/1.4/docs/api/java/awt/image/RenderedImage.html#getTile(int, int)" title="class or interface in java.awt.image">getTile</A></CODE> in interface <CODE><A HREF="http://java.sun.com/j2se/1.4/docs/api/java/awt/image/RenderedImage.html" title="class or interface in java.awt.image">RenderedImage</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>tileX</CODE> - Tile X index.<DD><CODE>tileY</CODE> - Tile Y index.
<DT><B>Returns:</B><DD>The requested tile.</DL>
</DD>
</DL>
<HR>

<A NAME="tileComputed(java.lang.Object, javax.media.jai.TileRequest[], javax.media.jai.PlanarImage, int, int, java.awt.image.Raster)"><!-- --></A><H3>
tileComputed</H3>
<PRE>
public void <B>tileComputed</B>(<A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/Object.html" title="class or interface in java.lang">Object</A>&nbsp;eventSource,
                         <A HREF="http://java.sun.com/products/java-media/jai/forDevelopers/jai-apidocs/javax/media/jai/TileRequest.html" title="class or interface in javax.media.jai">TileRequest</A>[]&nbsp;requests,
                         <A HREF="http://java.sun.com/products/java-media/jai/forDevelopers/jai-apidocs/javax/media/jai/PlanarImage.html" title="class or interface in javax.media.jai">PlanarImage</A>&nbsp;image,
                         int&nbsp;tileX,
                         int&nbsp;tileY,
                         <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/awt/image/Raster.html" title="class or interface in java.awt.image">Raster</A>&nbsp;tile)</PRE>
<DL>
<DD>Invoked when a tile has been computed.
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="http://java.sun.com/products/java-media/jai/forDevelopers/jai-apidocs/javax/media/jai/TileComputationListener.html#tileComputed(java.lang.Object, javax.media.jai.TileRequest[], javax.media.jai.PlanarImage, int, int, java.awt.image.Raster)" title="class or interface in javax.media.jai">tileComputed</A></CODE> in interface <CODE><A HREF="http://java.sun.com/products/java-media/jai/forDevelopers/jai-apidocs/javax/media/jai/TileComputationListener.html" title="class or interface in javax.media.jai">TileComputationListener</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>eventSource</CODE> - The caller of this method.<DD><CODE>requests</CODE> - The relevant tile computation requests as returned by the method
                    used to queue the tile.<DD><CODE>image</CODE> - The image for which tiles are being computed as specified to the
                    <A HREF="http://java.sun.com/products/java-media/jai/forDevelopers/jai-apidocs/javax/media/jai/TileScheduler.html" title="class or interface in javax.media.jai"><CODE>TileScheduler</CODE></A>.<DD><CODE>tileX</CODE> - The X index of the tile in the tile array.<DD><CODE>tileY</CODE> - The Y index of the tile in the tile array.<DD><CODE>tile</CODE> - The computed tile.</DL>
</DD>
</DL>
<HR>

<A NAME="tileCancelled(java.lang.Object, javax.media.jai.TileRequest[], javax.media.jai.PlanarImage, int, int)"><!-- --></A><H3>
tileCancelled</H3>
<PRE>
public void <B>tileCancelled</B>(<A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/Object.html" title="class or interface in java.lang">Object</A>&nbsp;eventSource,
                          <A HREF="http://java.sun.com/products/java-media/jai/forDevelopers/jai-apidocs/javax/media/jai/TileRequest.html" title="class or interface in javax.media.jai">TileRequest</A>[]&nbsp;requests,
                          <A HREF="http://java.sun.com/products/java-media/jai/forDevelopers/jai-apidocs/javax/media/jai/PlanarImage.html" title="class or interface in javax.media.jai">PlanarImage</A>&nbsp;image,
                          int&nbsp;tileX,
                          int&nbsp;tileY)</PRE>
<DL>
<DD>Invoked when a tile computation has been cancelled. The default implementation does nothing.
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="http://java.sun.com/products/java-media/jai/forDevelopers/jai-apidocs/javax/media/jai/TileComputationListener.html#tileCancelled(java.lang.Object, javax.media.jai.TileRequest[], javax.media.jai.PlanarImage, int, int)" title="class or interface in javax.media.jai">tileCancelled</A></CODE> in interface <CODE><A HREF="http://java.sun.com/products/java-media/jai/forDevelopers/jai-apidocs/javax/media/jai/TileComputationListener.html" title="class or interface in javax.media.jai">TileComputationListener</A></CODE></DL>
</DD>
<DD><DL>
</DL>
</DD>
</DL>
<HR>

<A NAME="tileComputationFailure(java.lang.Object, javax.media.jai.TileRequest[], javax.media.jai.PlanarImage, int, int, java.lang.Throwable)"><!-- --></A><H3>
tileComputationFailure</H3>
<PRE>
public void <B>tileComputationFailure</B>(<A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/Object.html" title="class or interface in java.lang">Object</A>&nbsp;eventSource,
                                   <A HREF="http://java.sun.com/products/java-media/jai/forDevelopers/jai-apidocs/javax/media/jai/TileRequest.html" title="class or interface in javax.media.jai">TileRequest</A>[]&nbsp;requests,
                                   <A HREF="http://java.sun.com/products/java-media/jai/forDevelopers/jai-apidocs/javax/media/jai/PlanarImage.html" title="class or interface in javax.media.jai">PlanarImage</A>&nbsp;image,
                                   int&nbsp;tileX,
                                   int&nbsp;tileY,
                                   <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/Throwable.html" title="class or interface in java.lang">Throwable</A>&nbsp;cause)</PRE>
<DL>
<DD>Invoked when a tile computation failed. Default implementation log a warning and lets the
 program continue as usual. We are not throwing an exception since this failure will alter
 the visual rendering, but will not otherwise harm the system.
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="http://java.sun.com/products/java-media/jai/forDevelopers/jai-apidocs/javax/media/jai/TileComputationListener.html#tileComputationFailure(java.lang.Object, javax.media.jai.TileRequest[], javax.media.jai.PlanarImage, int, int, java.lang.Throwable)" title="class or interface in javax.media.jai">tileComputationFailure</A></CODE> in interface <CODE><A HREF="http://java.sun.com/products/java-media/jai/forDevelopers/jai-apidocs/javax/media/jai/TileComputationListener.html" title="class or interface in javax.media.jai">TileComputationListener</A></CODE></DL>
</DD>
<DD><DL>
</DL>
</DD>
</DL>
<HR>

<A NAME="tileUpdate(java.awt.image.WritableRenderedImage, int, int, boolean)"><!-- --></A><H3>
tileUpdate</H3>
<PRE>
public void <B>tileUpdate</B>(<A HREF="http://java.sun.com/j2se/1.4/docs/api/java/awt/image/WritableRenderedImage.html" title="class or interface in java.awt.image">WritableRenderedImage</A>&nbsp;source,
                       int&nbsp;tileX,
                       int&nbsp;tileY,
                       boolean&nbsp;willBeWritable)</PRE>
<DL>
<DD>Invoked if the underlying image is writable and one of its tile changed.
 This method forward the call to every registered listener.
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="http://java.sun.com/j2se/1.4/docs/api/java/awt/image/TileObserver.html#tileUpdate(java.awt.image.WritableRenderedImage, int, int, boolean)" title="class or interface in java.awt.image">tileUpdate</A></CODE> in interface <CODE><A HREF="http://java.sun.com/j2se/1.4/docs/api/java/awt/image/TileObserver.html" title="class or interface in java.awt.image">TileObserver</A></CODE></DL>
</DD>
<DD><DL>
</DL>
</DD>
</DL>
<HR>

<A NAME="addTileObserver(java.awt.image.TileObserver)"><!-- --></A><H3>
addTileObserver</H3>
<PRE>
public void <B>addTileObserver</B>(<A HREF="http://java.sun.com/j2se/1.4/docs/api/java/awt/image/TileObserver.html" title="class or interface in java.awt.image">TileObserver</A>&nbsp;observer)</PRE>
<DL>
<DD>Adds an observer. This observer will be notified everytime a tile initially empty become
 available. If the observer is already present, it will receive multiple notifications.
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="http://java.sun.com/j2se/1.4/docs/api/java/awt/image/WritableRenderedImage.html#addTileObserver(java.awt.image.TileObserver)" title="class or interface in java.awt.image">addTileObserver</A></CODE> in interface <CODE><A HREF="http://java.sun.com/j2se/1.4/docs/api/java/awt/image/WritableRenderedImage.html" title="class or interface in java.awt.image">WritableRenderedImage</A></CODE></DL>
</DD>
<DD><DL>
</DL>
</DD>
</DL>
<HR>

<A NAME="removeTileObserver(java.awt.image.TileObserver)"><!-- --></A><H3>
removeTileObserver</H3>
<PRE>
public void <B>removeTileObserver</B>(<A HREF="http://java.sun.com/j2se/1.4/docs/api/java/awt/image/TileObserver.html" title="class or interface in java.awt.image">TileObserver</A>&nbsp;observer)</PRE>
<DL>
<DD>Removes an observer. If the observer was not registered, nothing happens.
 If the observer was registered for multiple notifications, it will now be
 registered for one fewer.
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="http://java.sun.com/j2se/1.4/docs/api/java/awt/image/WritableRenderedImage.html#removeTileObserver(java.awt.image.TileObserver)" title="class or interface in java.awt.image">removeTileObserver</A></CODE> in interface <CODE><A HREF="http://java.sun.com/j2se/1.4/docs/api/java/awt/image/WritableRenderedImage.html" title="class or interface in java.awt.image">WritableRenderedImage</A></CODE></DL>
</DD>
<DD><DL>
</DL>
</DD>
</DL>
<HR>

<A NAME="getWritableTile(int, int)"><!-- --></A><H3>
getWritableTile</H3>
<PRE>
public <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/awt/image/WritableRaster.html" title="class or interface in java.awt.image">WritableRaster</A> <B>getWritableTile</B>(int&nbsp;tileX,