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tqt3/extensions/nsplugin/examples/grapher/grapher.doc

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/*! \page grapher-nsplugin-example.html
\ingroup nsplugin-examples
\title Grapher Plugin
This example graphs data from a simple text file. It
demonstrates the use of the QNPInstance::writeReady()
and QNPInstance::write() functions.
To build the example, you must first build the
<a href=nsplugin.html>Qt Netscape Plugin Extension</a> library.
Then type <tt>make</tt> in <tt>extensions/nsplugin/examples/grapher/</tt>
and copy the resulting <tt>grapher.so</tt> or <tt>npgrapher.dll</tt>
to the Plugins directory of your WWW browser.
<EMBED ALIGN=LEFT WIDTH=49% HEIGHT=300 SRC=graph.g1n
graphstyle=pie fontfamily=times fontsize=18>
The text file it accepts as input has a title line, then
a sequence of lines with a number, then a string. The
plugin displays a pie chart of the numbers, each segment
labelled by the associated string. The user can select
a bar chart view of the same data by selecting from the
menu that appears when they point at the plugin.
The HTML tag used to embed the graph is:
<small>
<pre>
&lt;EMBED
SRC=graph.g1n
ALIGN=LEFT
WIDTH=49% HEIGHT=300
graphstyle=pie fontfamily=times
fontsize=18&gt;
</pre>
</small>
Note that some HTML arguments (which we have capitalized here)
are interpreted by the browser, while others are used by the
plugin.
<br clear>
With the simplicity and cross-platform nature of Qt-based plugins,
pages like <a href="http://www.netcraft.com/survey/">Netcraft's
Server Graphs</a> can be provided much more efficiently for both
the service provider and consumer. Data need not be converted
to an image at the server.
<br clear>
<hr>
Implementation:
\include grapher/grapher.cpp
*/
/*! \plainpage graph.g1n
num label
10 A
24 B
12 C
7 D
34 E
15 F
19 G
*/