abstractcanvas.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

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<CODE>abstract &nbsp;void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../org/geotools/display/canvas/AbstractCanvas.html#setObjectiveToDisplayTransform(org.opengis.referencing.operation.MathTransform)">setObjectiveToDisplayTransform</A></B>(MathTransform&nbsp;transform)</CODE>

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&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Sets the <A HREF="../../../../org/geotools/display/canvas/AbstractCanvas.html#getObjectiveCRS()">objective</A> to <A HREF="../../../../org/geotools/display/canvas/AbstractCanvas.html#getDisplayCRS()">display</A>
 transform to the specified transform. </TD>
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<CODE>&nbsp;void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../org/geotools/display/canvas/AbstractCanvas.html#setRenderingHint(java.awt.RenderingHints.Key, java.lang.Object)">setRenderingHint</A></B>(<A HREF="http://java.sun.com/j2se/1.4/docs/api/java/awt/RenderingHints.Key.html" title="class or interface in java.awt">RenderingHints.Key</A>&nbsp;key,
                 <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;value)</CODE>

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&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Adds a rendering hint. </TD>
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<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../org/geotools/display/canvas/AbstractCanvas.html#setTitle(org.opengis.util.InternationalString)">setTitle</A></B>(InternationalString&nbsp;title)</CODE>

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&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Sets the localized title of this . </TD>
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<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../org/geotools/display/canvas/AbstractCanvas.html#setTitle(java.lang.String)">setTitle</A></B>(<A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/String.html" title="class or interface in java.lang">String</A>&nbsp;title)</CODE>

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&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Sets the title of this . </TD>
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<CODE>&nbsp;<A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/String.html" title="class or interface in java.lang">String</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../org/geotools/display/canvas/AbstractCanvas.html#toString()">toString</A></B>()</CODE>

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&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Returns a string representation of this canvas and all its <CODE>Graphic</CODE>s.
 </TD>
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&nbsp;<A NAME="methods_inherited_from_class_DisplayObject"><!-- --></A>
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<TD><B>Methods inherited from class <A HREF="../../../../org/geotools/display/canvas/DisplayObject.html" title="class in org.geotools.display.canvas">DisplayObject</A></B></TD>
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<TD><CODE><A HREF="../../../../org/geotools/display/canvas/DisplayObject.html#addPropertyChangeListener(java.beans.PropertyChangeListener)">addPropertyChangeListener</A>, <A HREF="../../../../org/geotools/display/canvas/DisplayObject.html#addPropertyChangeListener(java.lang.String, java.beans.PropertyChangeListener)">addPropertyChangeListener</A>, <A HREF="../../../../org/geotools/display/canvas/DisplayObject.html#getImplHint(java.lang.String)">getImplHint</A>, <A HREF="../../../../org/geotools/display/canvas/DisplayObject.html#getLocale()">getLocale</A>, <A HREF="../../../../org/geotools/display/canvas/DisplayObject.html#getLogger()">getLogger</A>, <A HREF="../../../../org/geotools/display/canvas/DisplayObject.html#handleException(java.lang.String, java.lang.String, java.lang.Exception)">handleException</A>, <A HREF="../../../../org/geotools/display/canvas/DisplayObject.html#removePropertyChangeListener(java.beans.PropertyChangeListener)">removePropertyChangeListener</A>, <A HREF="../../../../org/geotools/display/canvas/DisplayObject.html#removePropertyChangeListener(java.lang.String, java.beans.PropertyChangeListener)">removePropertyChangeListener</A>, <A HREF="../../../../org/geotools/display/canvas/DisplayObject.html#setImplHint(java.lang.String, java.lang.Object)">setImplHint</A></CODE></TD>
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&nbsp;<A NAME="methods_inherited_from_class_Object"><!-- --></A>
<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
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<TD><B>Methods inherited from class <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/Object.html" title="class or interface in java.lang">Object</A></B></TD>
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<TR BGCOLOR="white" CLASS="TableRowColor">
<TD><CODE><A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/Object.html#clone()" title="class or interface in java.lang">clone</A>, <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/Object.html#equals(java.lang.Object)" title="class or interface in java.lang">equals</A>, <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/Object.html#finalize()" title="class or interface in java.lang">finalize</A>, <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/Object.html#getClass()" title="class or interface in java.lang">getClass</A>, <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/Object.html#hashCode()" title="class or interface in java.lang">hashCode</A>, <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/Object.html#notify()" title="class or interface in java.lang">notify</A>, <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/Object.html#notifyAll()" title="class or interface in java.lang">notifyAll</A>, <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/Object.html#wait()" title="class or interface in java.lang">wait</A>, <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/Object.html#wait(long)" title="class or interface in java.lang">wait</A>, <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/Object.html#wait(long, int)" title="class or interface in java.lang">wait</A></CODE></TD>
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&nbsp;<A NAME="methods_inherited_from_class_Canvas"><!-- --></A>
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<TD><B>Methods inherited from interface Canvas</B></TD>
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<TR BGCOLOR="white" CLASS="TableRowColor">
<TD><CODE>getDisplayToObjectiveTransform, getGraphicsAt, getGraphicsIn, getImplHint, getObjectiveToDisplayTransform, getState, getTopGraphicAt, isVisible, setImplHint</CODE></TD>
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<!-- ============ FIELD DETAIL =========== -->

<A NAME="field_detail"><!-- --></A>
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<B>Field Detail</B></FONT></TD>
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<A NAME="FINEST_RESOLUTION"><!-- --></A><H3>
FINEST_RESOLUTION</H3>
<PRE>
public static final <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/awt/RenderingHints.Key.html" title="class or interface in java.awt">RenderingHints.Key</A> <B>FINEST_RESOLUTION</B></PRE>
<DL>
<DD>The finest rendering resolution in unit of <A HREF="../../../../org/geotools/display/canvas/AbstractCanvas.html#getDisplayCRS()">display CRS</A>.
 In <cite>Java2D</cite>, those units are usually dots (1/72 of inch).
 If a geometry to be rendered has a finer resolution, it will be decimated in order to
 speed up the rendering. By convention, a resolution of 0 means the finest resolution
 available.
<P>
<DL>
</DL>
</DL>
<HR>

<A NAME="REQUIRED_RESOLUTION"><!-- --></A><H3>
REQUIRED_RESOLUTION</H3>
<PRE>
public static final <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/awt/RenderingHints.Key.html" title="class or interface in java.awt">RenderingHints.Key</A> <B>REQUIRED_RESOLUTION</B></PRE>
<DL>
<DD>The required rendering resolution in unit of <A HREF="../../../../org/geotools/display/canvas/AbstractCanvas.html#getDisplayCRS()">display CRS</A>.
 In <cite>Java2D</cite>, those units are usually dots (1/72 of inch).
 If a geometry has been decimated to a worst resolution, it will be resampled in order to get
 a more acceptable resolution. This value should be greater than <A HREF="../../../../org/geotools/display/canvas/AbstractCanvas.html#FINEST_RESOLUTION"><CODE>FINEST_RESOLUTION</CODE></A>.
<P>
<DL>
</DL>
</DL>
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<A NAME="PREFETCH"><!-- --></A><H3>
PREFETCH</H3>
<PRE>
public static final <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/awt/RenderingHints.Key.html" title="class or interface in java.awt">RenderingHints.Key</A> <B>PREFETCH</B></PRE>
<DL>
<DD><A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/Boolean.html#TRUE" title="class or interface in java.lang"><CODE>Boolean.TRUE</CODE></A> if the canvas is allowed to prefetch data before to paint graphics.
 Prefetching data may speed up rendering on machine with more than one processor. If this
 hint is not provided, then the canvas shall prefetch data if and only if the machine has
 at least two processors.
<P>
<DL>
<DT><B>See Also:</B><DD><A HREF="http://java.sun.com/products/java-media/jai/forDevelopers/jai-apidocs/javax/media/jai/PlanarImage.html#prefetchTiles(java.awt.Point[])" title="class or interface in javax.media.jai"><CODE>PlanarImage.prefetchTiles(java.awt.Point[])</CODE></A>, 
<A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/Runtime.html#availableProcessors()" title="class or interface in java.lang"><CODE>Runtime.availableProcessors()</CODE></A></DL>
</DL>
<HR>

<A NAME="hints"><!-- --></A><H3>
hints</H3>
<PRE>
protected final <A HREF="../../../../org/geotools/factory/Hints.html" title="class in org.geotools.factory">Hints</A> <B>hints</B></PRE>
<DL>
<DD>A set of rendering hints.
<P>
<DL>
<DT><B>See Also:</B><DD><A HREF="../../../../org/geotools/display/canvas/AbstractCanvas.html#PREFETCH"><CODE>PREFETCH</CODE></A>, 
<A HREF="../../../../org/geotools/display/canvas/AbstractCanvas.html#FINEST_RESOLUTION"><CODE>FINEST_RESOLUTION</CODE></A>, 
<A HREF="../../../../org/geotools/display/canvas/AbstractCanvas.html#REQUIRED_RESOLUTION"><CODE>REQUIRED_RESOLUTION</CODE></A>, 
<A HREF="../../../../org/geotools/factory/Hints.html#COORDINATE_OPERATION_FACTORY"><CODE>Hints.COORDINATE_OPERATION_FACTORY</CODE></A>, 
<A HREF="http://java.sun.com/j2se/1.4/docs/api/java/awt/RenderingHints.html#KEY_RENDERING" title="class or interface in java.awt"><CODE>RenderingHints.KEY_RENDERING</CODE></A>, 
<A HREF="http://java.sun.com/j2se/1.4/docs/api/java/awt/RenderingHints.html#KEY_COLOR_RENDERING" title="class or interface in java.awt"><CODE>RenderingHints.KEY_COLOR_RENDERING</CODE></A>, 
<A HREF="http://java.sun.com/j2se/1.4/docs/api/java/awt/RenderingHints.html#KEY_INTERPOLATION" title="class or interface in java.awt"><CODE>RenderingHints.KEY_INTERPOLATION</CODE></A></DL>
</DL>

<!-- ========= CONSTRUCTOR DETAIL ======== -->

<A NAME="constructor_detail"><!-- --></A>
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<TD COLSPAN=1><FONT SIZE="+2">
<B>Constructor Detail</B></FONT></TD>
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<A NAME="AbstractCanvas(org.opengis.go.display.DisplayFactory, org.geotools.factory.Hints)"><!-- --></A><H3>
AbstractCanvas</H3>
<PRE>
protected <B>AbstractCanvas</B>(DisplayFactory&nbsp;factory,
                         <A HREF="../../../../org/geotools/factory/Hints.html" title="class in org.geotools.factory">Hints</A>&nbsp;hints)</PRE>
<DL>
<DD>Creates an initially empty canvas.
<P>
<DT><B>Parameters:</B><DD><CODE>factory</CODE> - The display factory associated with this canvas, or  if none.<DD><CODE>hints</CODE> - The initial set of hints, or  if none.</DL>

<!-- ============ METHOD DETAIL ========== -->

<A NAME="method_detail"><!-- --></A>
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<B>Method Detail</B></FONT></TD>
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</TABLE>

<A NAME="getFactory()"><!-- --></A><H3>
getFactory</H3>
<PRE>
public DisplayFactory <B>getFactory</B>()</PRE>
<DL>
<DD>Returns the display factory associated with this canvas, or  if none.
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE>getFactory</CODE> in interface <CODE>Canvas</CODE></DL>
</DD>
<DD><DL>
</DL>
</DD>
</DL>
<HR>

<A NAME="getUID()"><!-- --></A><H3>
getUID</H3>
<PRE>
public <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/String.html" title="class or interface in java.lang">String</A> <B>getUID</B>()</PRE>
<DL>
<DD>Returns the unique identifier of this , which is assigned by the
 implementation. The UID is immutable and may be used to retrieve a particular
  from the <CODE>DisplayFactory</CODE>.
 <p>
 <strong>Note:</strong> In current implementation, a UID is valid only during the
 current execution of the Java Virtual Machine. There is no warranty that UID will
 stay the same in an other execution of the same program. It may also change in future
 Geotools versions.
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE>getUID</CODE> in interface <CODE>Canvas</CODE></DL>
</DD>
<DD><DL>

<DT><B>Returns:</B><DD>the UID of this .</DL>
</DD>
</DL>
<HR>

<A NAME="getTitle()"><!-- --></A><H3>
getTitle</H3>
<PRE>
public <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/String.html" title="class or interface in java.lang">String</A> <B>getTitle</B>()</PRE>
<DL>
<DD>Returns the title assigned to this , or  if none. If the title
 was <A HREF="../../../../org/geotools/display/canvas/AbstractCanvas.html#setTitle(org.opengis.util.InternationalString)">defined as an international string</A>, then
 this method returns the title in the <A HREF="../../../../org/geotools/display/canvas/DisplayObject.html#getLocale()">current locale</A>.
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE>getTitle</CODE> in interface <CODE>Canvas</CODE></DL>
</DD>
<DD><DL>
</DL>
</DD>
</DL>
<HR>

<A NAME="setTitle(java.lang.String)"><!-- --></A><H3>
setTitle</H3>
<PRE>
public void <B>setTitle</B>(<A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/String.html" title="class or interface in java.lang">String</A>&nbsp;title)</PRE>
<DL>
<DD>Sets the title of this . The title of a 
 may or may not be displayed on the titlebar of an application's window.
 <p>
 This method fires a {@value}
 property change event.
<P>
<DD><DL>