>> 1) We have already written a fair amount of code in SWT
Java.
>> Can it be converted into C++ code by some Pure-Native
tool?
Yes, the tool is called NewJ Equals C++. The
Preview Edition is freely available, but it is intentionally limited to only
translating classes from the org.eclipse.swt package and it sub-packages or the
default package. A less-limited Trial Edition as well as a Professional Edition
will be available soon.
>> 2) After we have converted SWT Java code to C++ (by tool or
manually), we should need only a C++ lib of SWT C++ to link with along with some
headers. Is that correct? Please confirm.
As designed and implemented, SWT depends on the
Java API. SWT C++ has the same dependency, but the Java API it uses is
implemented in 100% native C++ and no JRE, VM or JNI is used or required. So the
answer to your question is yes, you "need only a C++ lib of SWT C++ to link with
along with some headers" and a C++ lib that implements the Java API and its
headers. The latter C++ library is called NewJ for C++.
var
----- Original Message -----
Sent: Thursday, April 15, 2010 3:19
AM
Subject: Re: [platform-swt-dev] C++
Toolkit for SWT
Wow!
That sounds great, Grant Gayed!
Thanks a lot for the link.
Just a few more doubts which I think you being an expert may be able to
shed light upon :)
(I am also saving myself going through lengthy docs as well ;)
)
Please do help if you know.
1) We have already written a fair amount of code in SWT Java.
Can it be converted into C++ code by some Pure-Native tool?
2) After we have converted SWT Java code to C++ (by tool or manually), we
should need only a C++ lib of SWT C++ to link with along with some headers. Is
that correct? Please confirm.
Thanks again for the reply.
It really helped me.
Thanks
Techieeeeeeeee
On Thu, Apr 15, 2010 at 8:30 AM, <var@xxxxxxxxxxxxxxx>
wrote:
As mentioned below, the answer is Yes. It's
called SWT C++ and it's a 100% native C++ implementation of SWT. It's
produced entirely from the SWT Java implementation. Basically, it is SWT
Java source code compiled to C++ source code instead of compiled to Java
bytecode. It is like another platform target for SWT: native C++, requiring
no JRE and no JNI. It is feature-for-feature, bug-for-bug, and
pixel-accurate to SWT Java. Presently, it is at SWT version 3.4.1 and only
supported for Win32 desktop and Win CE (Pocket PC and Windows Mobile), and
Visual C++ 8.0 (Visual Studio 2005) and 7.1 (Visual Studio 2003). Visual C++
9.0 (Visual Studio 2008) support is working but not released. Other target
OS platforms are being considered.
Regarding the use case "such that even the GUI elements could be coded in C++ only," this is
not supported out-of-the-box, and we have not pursued this ourselves. That
being said, by nature of SWT's design, it should be entirely possible
to re-host an SWT C++ control in a SWT Java control or an Eclipse Workbench
part (either a view or an editor) along with a JNI wrapper for the SWT C++
control. It may even be possible to do this without changing SWT C++ at all
but no guarantees. There's a good explanation of how to wrap a native Win32
or Motif control as an SWT Java control along with JNI DLL on the Eclipse
Web site. See the headings "Wrapping a Native Widget",
"Windows Native
Code", and "Motif
Native Code" in the following
article:
----- Original Message -----
Sent: Wednesday, April 14, 2010 12:44
PM
Subject: Re: [platform-swt-dev] C++
Toolkit for SWT
First to answer your
question, there is a project at http://www.pure-native.com/ that takes an SWT release
and converts it to C++ for use in C++ apps (note: win32 only).
However, if I understand your
question correctly, you'll be writing/re-writing your UI in SWT from
scratch, and you want your app to run as an eclipse plug-in, right?
If so, I would suggest writing your UI using SWT's java
implementation. This will make the integration of your UI into
eclipse straight-forward, and will be cross-platform. You would then
use JNI to interact with the application logic that you want to preserve
from your existing C++ app. Grant
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