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<H1><A NAME="sec:11"><SPAN class="sec-nr">11</SPAN> <SPAN class="sec-title">Commonly
used libraries</SPAN></A></H1>
<A NAME="sec:libraries"></A>
<P>In this chapter we document some of the libraries from the
<CODE><<VAR>pcehome</VAR>>/prolog/lib</CODE> <font size=-1>XPCE/P</font>rolog
library. The libraries described here are only the commonly used ones.
For more information check the file <CODE>Overview</CODE> in the library
directory and the source-code of the library.
<P>
<UL>
<LI><A class="" href="findfile.html#sec:11.1">Asking a filename</A> This
library defines the object <A NAME="idx:finder:476"></A><B>@finder</B>,
instance of <B>finder</B>. The finder allows for asking filenames.
<P>
<LI><A class="" href="balloon.html#sec:11.2">Show help-balloon</A> The
library <CODE>library(help_message)</CODE> registers balloon-text with
graphical objects.
<P>
<LI><A class="" href="libdia.html#sec:11.3">Dialog utilities</A>
Toolbars and reporting facilities. Includes example code for an
application framework.
<P>
<LI><A class="" href="toc.html#sec:11.4">Table-of-content like
hierarchies</A> This library extends class <A class="" href="summary.html#class:tree">tree</A>,
displaying a modern-style hierarchy inside a window. This library is
used for displaying the VisualHierachy and ClassHierarchy tools of the <font size=-1>XPCE</font>
manual toolkit. See <A class="sec" href="online.html">chapter 3</A>.
<P>
<LI><A class="" href="tabular.html#sec:11.5">Tabular layout</A>
Primitives for dealing with tables.
<P>
<LI><A class="" href="libplot.html#sec:11.6">Plotting graphs and
barcharts</A> This section describes a number of libraries providing
primitives for drawing graphs and barcharts.
<P>
<LI><A class="" href="mlingual.html#sec:11.7">Multi-lingual applications</A>
Discusses support for multi-lingual applications.
<P>
<LI><A class="" href="dragdrop.html#sec:11.8">Drag and Drop Interface</A>
This library allows for drapping objects within one <font size=-1>XPCE</font>
application.
<P>
<LI><A class="" href="httpd.html#sec:11.9">Playing WEB (HTTP) server</A>
Class <B>httpd</B> is a subclass of <A class="" href="summary.html#class:socket">socket</A>
that deals with the HTTP protocol. It allows <font size=-1>XPCE</font>
to act as a web-server.
<P>
<LI><A class="" href="docrender.html#sec:11.10">Document rendering</A>
Primitives for rendering mixed text/graphics, handling fonts, alignment,
tables and other common text-layout primitives.
</UL>
<P>
<HR>
<CENTER>
<H2>Section Index</H2>
</CENTER>
<HR>
<DIV class="toc">
<DIV class="toc-h2"><A class="sec" href="findfile.html"><SPAN class="sec-nr">11.1</SPAN> <SPAN class="sec-title">Library
``find_file''</SPAN></A></DIV>
<DIV class="toc-h2"><A class="sec" href="balloon.html"><SPAN class="sec-nr">11.2</SPAN> <SPAN class="sec-title">Showing
help-balloons</SPAN></A></DIV>
<DIV class="toc-h2"><A class="sec" href="libdia.html"><SPAN class="sec-nr">11.3</SPAN> <SPAN class="sec-title">Dialog
support libraries</SPAN></A></DIV>
<DIV class="toc-h3"><A class="sec" href="libdia.html#sec:11.3.1"><SPAN class="sec-nr">11.3.1</SPAN> <SPAN class="sec-title">Reporting
errors and warnings</SPAN></A></DIV>
<DIV class="toc-h3"><A class="sec" href="libdia.html#sec:11.3.2"><SPAN class="sec-nr">11.3.2</SPAN> <SPAN class="sec-title">Toolbar
support</SPAN></A></DIV>
<DIV class="toc-h3"><A class="sec" href="libdia.html#sec:11.3.3"><SPAN class="sec-nr">11.3.3</SPAN> <SPAN class="sec-title">Example</SPAN></A></DIV>
<DIV class="toc-h2"><A class="sec" href="toc.html"><SPAN class="sec-nr">11.4</SPAN> <SPAN class="sec-title">Library
``pce_toc'': displaying hierarchies</SPAN></A></DIV>
<DIV class="toc-h2"><A class="sec" href="tabular.html"><SPAN class="sec-nr">11.5</SPAN> <SPAN class="sec-title">Tabular
layout</SPAN></A></DIV>
<DIV class="toc-h3"><A class="sec" href="tabular.html#sec:11.5.1"><SPAN class="sec-nr">11.5.1</SPAN> <SPAN class="sec-title">Using
format</SPAN></A></DIV>
<DIV class="toc-h3"><A class="sec" href="tabular.html#sec:11.5.2"><SPAN class="sec-nr">11.5.2</SPAN> <SPAN class="sec-title">Using
table using the ``tabular'' library</SPAN></A></DIV>
<DIV class="toc-h2"><A class="sec" href="libplot.html"><SPAN class="sec-nr">11.6</SPAN> <SPAN class="sec-title">Plotting
graphs and barcharts</SPAN></A></DIV>
<DIV class="toc-h3"><A class="sec" href="libplot.html#sec:11.6.1"><SPAN class="sec-nr">11.6.1</SPAN> <SPAN class="sec-title">Painting
axis</SPAN></A></DIV>
<DIV class="toc-h3"><A class="sec" href="libplot.html#sec:11.6.2"><SPAN class="sec-nr">11.6.2</SPAN> <SPAN class="sec-title">Plotting
graphs</SPAN></A></DIV>
<DIV class="toc-h3"><A class="sec" href="libplot.html#sec:11.6.3"><SPAN class="sec-nr">11.6.3</SPAN> <SPAN class="sec-title">Drawing
barcharts using ``plot/barchart''</SPAN></A></DIV>
<DIV class="toc-h4"><A class="sec" href="libplot.html#sec:11.6.3.1"><SPAN class="sec-nr">11.6.3.1</SPAN> <SPAN class="sec-title">Class <B>bar</B></SPAN></A></DIV>
<DIV class="toc-h4"><A class="sec" href="libplot.html#sec:11.6.3.2"><SPAN class="sec-nr">11.6.3.2</SPAN> <SPAN class="sec-title">Class <B>bar_button_group</B></SPAN></A></DIV>
<DIV class="toc-h2"><A class="sec" href="mlingual.html"><SPAN class="sec-nr">11.7</SPAN> <SPAN class="sec-title">Multi-lingual
applications</SPAN></A></DIV>
<DIV class="toc-h2"><A class="sec" href="dragdrop.html"><SPAN class="sec-nr">11.8</SPAN> <SPAN class="sec-title">Drag
and drop interface</SPAN></A></DIV>
<DIV class="toc-h3"><A class="sec" href="dragdrop.html#sec:11.8.1"><SPAN class="sec-nr">11.8.1</SPAN> <SPAN class="sec-title">Related
methods</SPAN></A></DIV>
<DIV class="toc-h2"><A class="sec" href="httpd.html"><SPAN class="sec-nr">11.9</SPAN> <SPAN class="sec-title">Playing
WEB (HTTP) server</SPAN></A></DIV>
<DIV class="toc-h3"><A class="sec" href="httpd.html#sec:11.9.1"><SPAN class="sec-nr">11.9.1</SPAN> <SPAN class="sec-title">Class <B>httpd</B></SPAN></A></DIV>
<DIV class="toc-h2"><A class="sec" href="docrender.html"><SPAN class="sec-nr">11.10</SPAN> <SPAN class="sec-title">Document
rendering primitives</SPAN></A></DIV>
<DIV class="toc-h3"><A class="sec" href="docrender.html#sec:11.10.1"><SPAN class="sec-nr">11.10.1</SPAN> <SPAN class="sec-title">The
rendering library</SPAN></A></DIV>
<DIV class="toc-h3"><A class="sec" href="docrender.html#sec:11.10.2"><SPAN class="sec-nr">11.10.2</SPAN> <SPAN class="sec-title">Predefined
objects</SPAN></A></DIV>
<DIV class="toc-h3"><A class="sec" href="docrender.html#sec:11.10.3"><SPAN class="sec-nr">11.10.3</SPAN> <SPAN class="sec-title">Class
and method reference</SPAN></A></DIV>
<DIV class="toc-h4"><A class="sec" href="docrender.html#sec:11.10.3.1"><SPAN class="sec-nr">11.10.3.1</SPAN> <SPAN class="sec-title">Class <B>vfont</B></SPAN></A></DIV>
<DIV class="toc-h4"><A class="sec" href="docrender.html#sec:11.10.3.2"><SPAN class="sec-nr">11.10.3.2</SPAN> <SPAN class="sec-title">Rendering
actions</SPAN></A></DIV>
<DIV class="toc-h3"><A class="sec" href="docrender.html#sec:11.10.4"><SPAN class="sec-nr">11.10.4</SPAN> <SPAN class="sec-title">Using
the ``doc/emit'' library</SPAN></A></DIV>
</DIV>
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