Take a look at Qt and KDE: www.kde.org .
Vladimir Dergachev
On Fri, 19 Oct 2001 [EMAIL PROTECTED] wrote:
> Hi all,
>
> I am currently teaching myself to program X app's. I am using a
> workstation running Redhat 7.0 using XFree86 version 4.0.1.
>
> My normal work requires me to program in C++, so I got a hold of a
> web-tutorial for X coding
> (http://www.comp.lancs.ac.uk/computing/users/sean/Motif-Workshop/workshop1.html),
>
> and, based on the information therein, started to write a simple class.
>
> To start off with, I thought I'd write a class called "X_application" to
> encapsulate all of the X initialisation code, so that subsequently I can
> just inherit from the class whenever I want to put an X app together.
>
> I wrote the following code in 3 files (X_application.H, X_application.C and
> main.C) :
>
> X_application.H:
>
> class X_application
> {
> public:
> X_application();
> X_application();
> };
>
> X_application.C:
>
> #include "X_application.H"
>
> X_application::X_application()
> {
> }
>
> X_application::~X_application()
> {
> }
>
> main.C:
>
> #include "X_application.H"
>
> int main(int argc, char **argv)
> {
> X_application x_app;
> }
>
>
> ...
> This compiles fine.
>
> I then added the following code to X_application.C
>
> #include <Xm/Xm.h>
>
> such that X_application.C now looked like this:
>
>
> #include "X_application.H"
> #include <Xm/Xm.h>
>
> X_application::X_application()
> {
> }
>
> X_application::~X_application()
> {
> }
>
>
> and then tried to compile. This resulted in a stream of errors, apparently
> from /usr/include/X11/Xlib.h, of the form:
>
> /usr/include/X11/Xlib.h:211: syntax error before `:'
>
> After discussion with a collegue, I swapped the
> #include "X_application.H"
>
> and
>
> #include <Xm/Xm.h>
>
> So that <Xm/Xm.h> came first.
>
> A fresh compile lead to two errors:
>
> X_application.C:4: syntax error before `::'
> X_application.C:8: syntax error before `::'
>
>
> This lead me to suspect that there was a problem relating to using C and
> C++ headers together, so I wrapped the #include <Xm/Xm.h> such that
> X_application.C now looked like this:
>
> extern "C"
> {
> #include <Xm/Xm.h>
> }
> #include "X_application.H"
>
> X_application::X_application()
> {
> }
>
> X_application::~X_application()
> {
> }
>
>
> A re-compile of this code however produced exactly the same errors.
>
> My next step was to get onto Google.com and do a search for "Xm.h
> " and "g++". The results of this indicated to me that there is a known
> problem with the X headers that make it complain when it comes across C++
> code.
>
> My question:
>
> Is there any way around this? Based on a few usenet posts that I came
> across, I have tried compile flags such as:
>
> -fpermissive
>
> and
>
> -fhonor-std
>
> to no avail. Short of writing all the X code in straight C in a seperate
> file and then extern "C" ing each of the functions (which strikes me as
> ugly and a real pain), I am not sure how else to proceed. Is there some
> workaround for this short of the pure C option?
>
> thanks heaps
>
> David Buddrige
> Software Engineer
> Logica
>
> _______________________________________________
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