📄 invalidator.html
字号:
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Frameset//EN""http://www.w3.org/TR/REC-html40/frameset.dtd"><!--NewPage--><HTML><HEAD><!-- Generated by javadoc on Mon Jul 15 11:49:45 PDT 2002 --><TITLE>: Class Invalidator</TITLE><LINK REL ="stylesheet" TYPE="text/css" HREF="../../../stylesheet.css" TITLE="Style"></HEAD><BODY BGCOLOR="white"><!-- ========== START OF NAVBAR ========== --><A NAME="navbar_top"><!-- --></A><TABLE BORDER="0" WIDTH="100%" CELLPADDING="1" CELLSPACING="0"><TR><TD COLSPAN=2 BGCOLOR="#EEEEFF" CLASS="NavBarCell1"><A NAME="navbar_top_firstrow"><!-- --></A><TABLE BORDER="0" CELLPADDING="0" CELLSPACING="3"> <TR ALIGN="center" VALIGN="top"> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../../overview-summary.html"><FONT CLASS="NavBarFont1"><B>Overview</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="package-summary.html"><FONT CLASS="NavBarFont1"><B>Package</B></FONT></A> </TD> <TD BGCOLOR="#FFFFFF" CLASS="NavBarCell1Rev"> <FONT CLASS="NavBarFont1Rev"><B>Class</B></FONT> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="class-use/Invalidator.html"><FONT CLASS="NavBarFont1"><B>Use</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="package-tree.html"><FONT CLASS="NavBarFont1"><B>Tree</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../../deprecated-list.html"><FONT CLASS="NavBarFont1"><B>Deprecated</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../../index-all.html"><FONT CLASS="NavBarFont1"><B>Index</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../../help-doc.html"><FONT CLASS="NavBarFont1"><B>Help</B></FONT></A> </TD> </TR></TABLE></TD><TD ALIGN="right" VALIGN="top" ROWSPAN=3><EM></EM></TD></TR><TR><TD BGCOLOR="white" CLASS="NavBarCell2"><FONT SIZE="-2"> <A HREF="../../../quicktime/app/actions/GenericResponder.html"><B>PREV CLASS</B></A> <A HREF="../../../quicktime/app/actions/MatrixAction.html"><B>NEXT CLASS</B></A></FONT></TD><TD BGCOLOR="white" CLASS="NavBarCell2"><FONT SIZE="-2"> <A HREF="../../../index.html" TARGET="_top"><B>FRAMES</B></A> <A HREF="Invalidator.html" TARGET="_top"><B>NO FRAMES</B></A></FONT></TD></TR><TR><TD VALIGN="top" CLASS="NavBarCell3"><FONT SIZE="-2"> SUMMARY: INNER | <A HREF="#field_summary">FIELD</A> | <A HREF="#constructor_summary">CONSTR</A> | <A HREF="#method_summary">METHOD</A></FONT></TD><TD VALIGN="top" CLASS="NavBarCell3"><FONT SIZE="-2">DETAIL: <A HREF="#field_detail">FIELD</A> | <A HREF="#constructor_detail">CONSTR</A> | <A HREF="#method_detail">METHOD</A></FONT></TD></TR></TABLE><!-- =========== END OF NAVBAR =========== --><HR><!-- ======== START OF CLASS DATA ======== --><H2><FONT SIZE="-1">quicktime.app.actions</FONT><BR>Class Invalidator</H2><PRE>java.lang.Object | +--<B>quicktime.app.actions.Invalidator</B></PRE><DL><DT><B>All Implemented Interfaces:</B> <DD><A HREF="../../../quicktime/app/time/Ticklish.html">Ticklish</A></DD></DL><HR><DL><DT>public class <B>Invalidator</B><DT>extends java.lang.Object<DT>implements <A HREF="../../../quicktime/app/time/Ticklish.html">Ticklish</A></DL><P>The Invalidator class is used as a helper class when Compositing objects that have a changing image source. <P> The SWCompositor uses QuickTime's SpriteWorld to draw a member's image. If the member's image data is changing but there are no changes in the presentation of the member's Sprite (a QuickTime Sprite is used to represent the member in the SpriteWorld of the SWCompositor) then the compositing cycle of the SpriteWorld will not redraw the Sprite. Thus in order to force the SpriteWorld to redraw a Sprite of this nature, the Sprite that is presenting the member must be invalidated. <P> Some classes explicitly use the Invalidator class in this release, the CompositableEffect and QTImageDrawer. Implicit invalidation is done in other classes (MoviePresenter, the SWCompositor itself if it a member of a parent SWCompositor) as they possess their own sense of drawing. <P> If an Invalidator is required it is returned by the addedToCompositor method and the SWCompositor keeps a list of the Invalidators and invokes the invalidator each time the SWCompositor itself is tickled. Subclasses of the Invalidator class can override the tickle method and be more efficient based on the explicit conditions under which the TwoDSprite is invalidated. For example if a QTImageDrawer is not redrawing every time the TwoDSprite needs only to be invalidated when the QTImageDrawer signifies that it is redrawing. Thus the Invalidator for the QTImageDrawer checks isRedrawing() and only redraws and invalidates the presenting Sprite if the QTImageDrawer returns true from the isRedrawing() call. It will still ask the QTImageDrawer if it requires redrawing upon each composit loop when the Invalidator itself is activated. <P><P><DL><DT><B>See Also: </B><DD><CODE>quicktime.app.display.SWCompositor</CODE>, <A HREF="../../../quicktime/app/image/QTImageDrawer.html"><CODE>QTImageDrawer</CODE></A>, <A HREF="../../../quicktime/app/players/MoviePresenter.html"><CODE>MoviePresenter</CODE></A></DL><HR><P><!-- ======== INNER CLASS SUMMARY ======== --><!-- =========== FIELD SUMMARY =========== --><A NAME="field_summary"><!-- --></A><TABLE BORDER="1" CELLPADDING="3" CELLSPACING="0" WIDTH="100%"><TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"><TD COLSPAN=2><FONT SIZE="+2"><B>Field Summary</B></FONT></TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE>protected <A HREF="../../../quicktime/app/anim/TwoDSprite.html">TwoDSprite</A></CODE></FONT></TD><TD><CODE><B><A HREF="../../../quicktime/app/actions/Invalidator.html#s">s</A></B></CODE><BR> This is the sprite that requires invalidation in the tickle call</TD></TR></TABLE> <A NAME="fields_inherited_from_class_quicktime.app.time.Ticklish"><!-- --></A><TABLE BORDER="1" CELLPADDING="3" CELLSPACING="0" WIDTH="100%"><TR BGCOLOR="#EEEEFF" CLASS="TableSubHeadingColor"><TD><B>Fields inherited from interface quicktime.app.time.<A HREF="../../../quicktime/app/time/Ticklish.html">Ticklish</A></B></TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD><CODE><A HREF="../../../quicktime/app/time/Ticklish.html#kScale">kScale</A></CODE></TD></TR></TABLE> <!-- ======== CONSTRUCTOR SUMMARY ======== --><A NAME="constructor_summary"><!-- --></A><TABLE BORDER="1" CELLPADDING="3" CELLSPACING="0" WIDTH="100%"><TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"><TD COLSPAN=2><FONT SIZE="+2"><B>Constructor Summary</B></FONT></TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD><CODE><B><A HREF="../../../quicktime/app/actions/Invalidator.html#Invalidator(quicktime.app.anim.TwoDSprite)">Invalidator</A></B>(<A HREF="../../../quicktime/app/anim/TwoDSprite.html">TwoDSprite</A> s)</CODE><BR> Constructs an Invalidator with the TwoDSprite that is presenting the Image and would require invalidation.</TD></TR></TABLE> <!-- ========== METHOD SUMMARY =========== --><A NAME="method_summary"><!-- --></A><TABLE BORDER="1" CELLPADDING="3" CELLSPACING="0" WIDTH="100%"><TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"><TD COLSPAN=2><FONT SIZE="+2"><B>Method Summary</B></FONT></TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> <A HREF="../../../quicktime/app/anim/TwoDSprite.html">TwoDSprite</A></CODE></FONT></TD><TD><CODE><B><A HREF="../../../quicktime/app/actions/Invalidator.html#getTarget()">getTarget</A></B>()</CODE><BR> This returns the target TwoDSprite of the Invalidator.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">⌨️ 快捷键说明
复制代码
Ctrl + C
搜索代码
Ctrl + F
全屏模式
F11
切换主题
Ctrl + Shift + D
显示快捷键
?
增大字号
Ctrl + =
减小字号
Ctrl + -