<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd"> <HTML> <HEAD> <TITLE>Programming in XPCE/Prolog: Section 5.6</TITLE><LINK REL=home HREF="index.html"> <LINK REL=contents HREF="Contents.html"> <LINK REL=index HREF="DocIndex.html"> <LINK REL=summary HREF="summary.html"> <LINK REL=previous HREF="recogniser.html"> <LINK REL=next HREF="pceprolog.html"> <STYLE type="text/css"> /* Style sheet for SWI-Prolog latex2html */ dd.defbody { margin-bottom: 1em; } dt.pubdef { background-color: #c5e1ff; } pre.code { margin-left: 1.5em; margin-right: 1.5em; border: 1px dotted; padding-top: 5px; padding-left: 5px; padding-bottom: 5px; background-color: #f8f8f8; } div.navigate { text-align: center; background-color: #f0f0f0; border: 1px dotted; padding: 5px; } div.title { text-align: center; padding-bottom: 1em; font-size: 200%; font-weight: bold; } div.author { text-align: center; font-style: italic; } div.abstract { margin-top: 2em; background-color: #f0f0f0; border: 1px dotted; padding: 5px; margin-left: 10%; margin-right:10%; } div.abstract-title { text-align: center; padding: 5px; font-size: 120%; font-weight: bold; } div.toc-h1 { font-size: 200%; font-weight: bold; } div.toc-h2 { font-size: 120%; font-weight: bold; margin-left: 2em; } div.toc-h3 { font-size: 100%; font-weight: bold; margin-left: 4em; } div.toc-h4 { font-size: 100%; margin-left: 6em; } span.sec-nr { } span.sec-title { } span.pred-ext { font-weight: bold; } /* Footnotes */ sup.fn { color: blue; text-decoration: underline; } span.fn-text: { display: none; } sup.fn span {display: none;} sup:hover span { display: block !important; position: absolute; top: auto; left: auto; width: 80%; color: #000; background: white; border: 2px solid; padding: 5px; margin: 10px; z-index: 100; font-size: smaller; } </STYLE> </HEAD> <BODY BGCOLOR="white"> <DIV class="navigate"><A class="nav" href="index.html"><IMG SRC="home.gif" BORDER=0 ALT="Home"></A> <A class="nav" href="Contents.html"><IMG SRC="index.gif" BORDER=0 ALT="Contents"></A> <A class="nav" href="DocIndex.html"><IMG SRC="yellow_pages.gif" BORDER=0 ALT="Index"></A> <A class="nav" href="summary.html"><IMG SRC="info.gif" BORDER=0 ALT="Summary"></A> <A class="nav" href="recogniser.html"><IMG SRC="prev.gif" BORDER=0 ALT="Previous"></A> <A class="nav" href="pceprolog.html"><IMG SRC="next.gif" BORDER=0 ALT="Next"></A> </DIV> <H2><A NAME="sec:5.6"><SPAN class="sec-nr">5.6</SPAN> <SPAN class="sec-title">Summary</SPAN></A></H2> <P>In this section we have introduced some of the graphics capabilities of <font size=-1>XPCE</font>. <font size=-1>XPCE</font>'s graphics are built from primitive and compound graphicals. A compound graphical has its own coordinate system in which it can display any graphical object including other compound objects. Graphical objects can be connected to each others using a <A class="" href="summary.html#class:connection">connection</A>. This facility makes the generation of graphs relatively simple. It also makes it very simple to extract the graph represented by a drawing made by the user. <P>Graphical objects are made sensitive to mouse and keyboard activities by attaching <A class="" href="summary.html#class:recogniser">recogniser</A> objects to them. <font size=-1>XPCE</font> defines standard recognisers for various complex operations such as moving, resizing, popup-menu's, linking graphicals and clicking on graphicals. <P></BODY></HTML>