mirror of
https://github.com/NGSolve/netgen.git
synced 2024-12-29 15:20:33 +05:00
110 lines
4.2 KiB
HTML
110 lines
4.2 KiB
HTML
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
|
|
"http://www.w3.org/TR/html4/loose.dtd">
|
|
<html>
|
|
<!-- vi:set sw=2: -->
|
|
<!--
|
|
Copyright (C) 1996-2002 Brian Paul and Ben Bederson
|
|
Copyright (C) 2005-2009 Greg Couch
|
|
See the LICENSE file for copyright details.
|
|
-->
|
|
|
|
<head>
|
|
<meta http-equiv="Content-Type" content="text/html;charset=utf-8">
|
|
<title>Upgrading to Version 2</title>
|
|
</head>
|
|
|
|
<body>
|
|
<script type="text/javascript" src="header.js"></script>
|
|
<script type="text/javascript">
|
|
NavigationBar();
|
|
</script>
|
|
|
|
<h1 align="center">Upgrading to Version 2</h1>
|
|
|
|
<h2>Contents</h2>
|
|
<ul>
|
|
<li><a href="#callbacks">Widget callback changes</a>
|
|
<li><a href="#subcommands">Widget subcommand changes</a>
|
|
<li><a href="#stereo">Stereo changes</a>
|
|
<li><a href="#fonts">Font API changes</a>
|
|
</ul>
|
|
|
|
<hr>
|
|
|
|
<p>
|
|
Internally, Togl version 2 isn't very different from version 1,
|
|
and much of the C interface is the same.
|
|
The main difference is that the focus of the Togl API has changed
|
|
from being a C API to being a Tcl API.
|
|
Which means that the full power of Togl is accessible from Tcl
|
|
(the few exceptions are considered bugs).
|
|
|
|
<h2><a name="callbacks">Widget callback changes</a></h2>
|
|
|
|
The biggest change is how the various callback are initialized.
|
|
In version 1,
|
|
the C API Togl_Set*Func functions had to be used
|
|
to setup the callback functions before creating the Togl widget.
|
|
And once the callbacks were set for a particular Togl widget,
|
|
they could not be changed.
|
|
If more than once Togl widget was needed,
|
|
the callback functions would need to be reset before each widget creation.
|
|
In version 2,
|
|
the callbacks are configuration arguments to the widget
|
|
and can be updated like any other standard widget configuration option.
|
|
See the <a href="tclapi.html">Tcl API</a> for details.
|
|
|
|
<h2><a name="subcommands">Widget subcommand changes</a></h2>
|
|
|
|
Version 1 also allowed new subcommands to be added
|
|
to the togl widget command via the C API.
|
|
This was dropped for a variety of reasons:
|
|
there is no exact Tcl equivalent,
|
|
there is no standard object-oriented technique
|
|
currently in the Tcl core (8.4.13),
|
|
it is unclear how to make the API thread safe,
|
|
and the internal Tcl C API doesn't support
|
|
dynamically changing sets of subcommands.
|
|
That said, this functionality might come back, especially when
|
|
<a href="http://www.tcl.tk/cgi-bin/tct/tip/">TIP #257</a> is implemented.
|
|
Instead, in version 2,
|
|
create a Tcl function that takes the Togl widget as an argument.
|
|
Functions written in C can get the underlying Togl structure handle
|
|
with either the <code>Togl_GetToglFromObj</code>
|
|
or the <code>Togl_GetToglFromName</code> function,
|
|
as appropriate.
|
|
This means that there are no special Togl commands, only Tcl commands.
|
|
See the <a href="tclapi.html">C API</a> for details.
|
|
|
|
<h2><a name="stereo">Stereo changes</a></h2>
|
|
|
|
The stereo support has been totally revamped.
|
|
Some <a href="stereo.html">form of stereo</a> is available all of the time.
|
|
|
|
<h2><a name="fonts">Font changes</a></h2>
|
|
|
|
Tcl support for writing strings has been added.
|
|
<p>
|
|
|
|
The <a href="capi.html#font">font C API</a> has been revised
|
|
so that Togl_LoadBitmapFont returns a font object instead an integer
|
|
(likewise for Togl_UnloadBitmapFont).
|
|
So instead of calling glListBase and glCallLists directly,
|
|
use Togl_WriteObj or Togl_WriteChars.
|
|
<p>
|
|
The TOGL_BITMAP_* constants remain for limited backwards
|
|
source compatibility and are deprecated.
|
|
The acceptable font names are now the same as Tk_GetFont
|
|
and the Tk font command on all platforms.
|
|
|
|
<hr>
|
|
<a href="http://sourceforge.net/projects/togl">
|
|
<img src="http://sflogo.sourceforge.net/sflogo.php?group_id=519&type=13" width="120" height="30" border="0" alt="Get Togl at SourceForge.net. Fast, secure and Free Open Source software downloads">
|
|
</a>
|
|
<a href="http://validator.w3.org/check?uri=referer">
|
|
<img src="http://www.w3.org/Icons/valid-html401-blue"
|
|
alt="Valid HTML 4.01 Transitional" height="31" width="88" border="0">
|
|
</a>
|
|
</body>
|
|
</html>
|