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<HTML><HEAD><TITLE>CanvasAbstractItem</TITLE><METANAME="GENERATOR"CONTENT="Modular DocBook HTML Stylesheet Version 1.53"><LINKREL="HOME"TITLE="Documentation Set for Swarm 2.1.1"HREF="set.html"><LINKREL="UP"TITLE="Gui Library"HREF="swarm.gui.sgml.reference.html"><LINKREL="PREVIOUS"TITLE="Canvas"HREF="swarm.gui.canvas.protocol.html"><LINKREL="NEXT"TITLE="CanvasItem"HREF="swarm.gui.canvasitem.protocol.html"></HEAD><BODYCLASS="REFENTRY"BGCOLOR="#FFFFFF"TEXT="#000000"LINK="#0000FF"VLINK="#840084"ALINK="#0000FF"><DIVCLASS="NAVHEADER"><TABLEWIDTH="100%"BORDER="0"CELLPADDING="0"CELLSPACING="0"><TR><THCOLSPAN="3"ALIGN="center">Documentation Set for Swarm 2.1.1</TH></TR><TR><TDWIDTH="10%"ALIGN="left"VALIGN="bottom"><AHREF="swarm.gui.canvas.protocol.html">Prev</A></TD><TDWIDTH="80%"ALIGN="center"VALIGN="bottom">Reference VIII. Gui Library</TD><TDWIDTH="10%"ALIGN="right"VALIGN="bottom"><AHREF="swarm.gui.canvasitem.protocol.html">Next</A></TD></TR></TABLE><HRALIGN="LEFT"WIDTH="100%"></DIV><H1><ANAME="SWARM.GUI.CANVASABSTRACTITEM.PROTOCOL">CanvasAbstractItem</A></H1><DIVCLASS="REFNAMEDIV"><ANAME="AEN18515"></A><H2>Name</H2>CanvasAbstractItem -- An abstract class for items on a Canvas.</DIV><DIVCLASS="REFSECT1"><ANAME="AEN18518"></A><H2>Description</H2><P> CanvasAbstractItem is the root class of all items drawn on a Canvas.</P></DIV><DIVCLASS="REFSECT1"><ANAME="AEN18521"></A><H2>Protocols adopted by CanvasAbstractItem</H2><P> <AHREF="swarm.defobj.create.protocol.html">Create</A> <AHREF="swarm.defobj.drop.protocol.html">Drop</A></P></DIV><DIVCLASS="REFSECT1"><ANAME="AEN18526"></A><H2>Methods</H2><DIVCLASS="REFSECT2"><ANAME="AEN18528"></A><H3>Phase: Creating</H3><P></P><UL><LI><DIVCLASS="FUNCSYNOPSIS"><ANAME="SWARM.GUI.CANVASABSTRACTITEM.METHOD.PC.M233"></A><P></P>- <BCLASS="FUNCPROTOTYPE">createItem</B><BR> Method to be implemented by subclass.<P></P></DIV></LI><LI><DIVCLASS="FUNCSYNOPSIS"><ANAME="SWARM.GUI.CANVASABSTRACTITEM.METHOD.PC.M223"></A><P></P>- <BCLASS="FUNCPROTOTYPE">createBindings</B><BR> Method to be implemented by subclass.<P></P></DIV></LI><LI><DIVCLASS="FUNCSYNOPSIS"><ANAME="SWARM.GUI.CANVASABSTRACTITEM.METHOD.PC.M697"></A><P></P>- <BCLASS="FUNCPROTOTYPE">setCanvas:</B> <VARCLASS="PDPARAM">canvas</VAR> <BR> Designates the id of the Canvas in which this item resides.<P></P></DIV></LI></UL></DIV><DIVCLASS="REFSECT2"><ANAME="AEN18556"></A><H3>Phase: Using</H3><P></P><UL><LI><DIVCLASS="FUNCSYNOPSIS"><ANAME="SWARM.GUI.CANVASABSTRACTITEM.METHOD.PU.M879"></A><P></P>- <BCLASS="FUNCPROTOTYPE">setTargetId:</B> <VARCLASS="PDPARAM">target</VAR> <BR> Designates the object to which this item refers.<P></P></DIV></LI><LI><DIVCLASS="FUNCSYNOPSIS"><ANAME="SWARM.GUI.CANVASABSTRACTITEM.METHOD.PU.M703"></A><P></P>- <BCLASS="FUNCPROTOTYPE">setClickSel:</B> (SEL)<VARCLASS="PDPARAM">sel</VAR> <BR> Sets the message that will be sent upon a click on this item.<P></P></DIV></LI><LI><DIVCLASS="FUNCSYNOPSIS"><ANAME="SWARM.GUI.CANVASABSTRACTITEM.METHOD.PU.M803"></A><P></P>- <BCLASS="FUNCPROTOTYPE">setMoveSel:</B> (SEL)<VARCLASS="PDPARAM">sel</VAR> <BR> Sets the message that will effect the motion of the item on the canvas.<P></P></DIV></LI><LI><DIVCLASS="FUNCSYNOPSIS"><ANAME="SWARM.GUI.CANVASABSTRACTITEM.METHOD.PU.M825"></A><P></P>- <BCLASS="FUNCPROTOTYPE">setPostMoveSel:</B> (SEL)<VARCLASS="PDPARAM">sel</VAR> <BR> Sets the message that will dictate what happens after the item is moved.<P></P></DIV></LI><LI><DIVCLASS="FUNCSYNOPSIS"><ANAME="SWARM.GUI.CANVASABSTRACTITEM.METHOD.PU.M196"></A><P></P>- <BCLASS="FUNCPROTOTYPE">clicked</B><BR> Called when a mouse click occurs.<P></P></DIV></LI><LI><DIVCLASS="FUNCSYNOPSIS"><ANAME="SWARM.GUI.CANVASABSTRACTITEM.METHOD.PU.M549"></A><P></P>- <BCLASS="FUNCPROTOTYPE">initiateMoveX:</B> (long)<VARCLASS="PDPARAM">delta_x</VAR> <BCLASS="FUNCPROTOTYPE">Y:</B> (long)<VARCLASS="PDPARAM">delta_y</VAR> <BR> Method to be implemented by subclass.<P></P></DIV></LI><LI><DIVCLASS="FUNCSYNOPSIS"><ANAME="SWARM.GUI.CANVASABSTRACTITEM.METHOD.PU.M329"></A><P></P>- <BCLASS="FUNCPROTOTYPE">getCanvas</B><BR> Return the canvas.<P></P></DIV></LI></UL></DIV></DIV><DIVCLASS="NAVFOOTER"><HRALIGN="LEFT"WIDTH="100%"><TABLEWIDTH="100%"BORDER="0"CELLPADDING="0"CELLSPACING="0"><TR><TDWIDTH="33%"ALIGN="left"VALIGN="top"><AHREF="swarm.gui.canvas.protocol.html">Prev</A></TD><TDWIDTH="34%"ALIGN="center"VALIGN="top"><AHREF="set.html">Home</A></TD><TDWIDTH="33%"ALIGN="right"VALIGN="top"><AHREF="swarm.gui.canvasitem.protocol.html">Next</A></TD></TR><TR><TDWIDTH="33%"ALIGN="left"VALIGN="top">Canvas</TD><TDWIDTH="34%"ALIGN="center"VALIGN="top"><AHREF="swarm.gui.sgml.reference.html">Up</A></TD><TDWIDTH="33%"ALIGN="right"VALIGN="top">CanvasItem</TD></TR></TABLE></DIV></BODY></HTML>⌨️ 快捷键说明
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