Hi:
Please help me with this, I also have problems to compile some simple
examples that I find in a libsigc++ rpm paquage, I try to compile with
this command:
g++ signals.cc -o signals `pkg-config --cflags --libs sigc++-2.0`
the simple "hello_world.cc" work fine, but I try to compile a second
example (at bottom of this message) I can't asociate object method, only
funtion pointers (I comment the stuff that don't work to try to compile
the rest of the example):
// I don't know the correct libsigc++ include section, I use fedora 5 I
try different combinations
#include <iostream>
#include <string>
// (1) Include the signal system in headers file.
//#include <sigc++/signal_system.h>
#include <sigc++/sigc++.h>
#include <sigc++/slot.h>
//#include <sigc++/functors/slot.h>
//#include <sigc++/object.h>
#include <sigc++/object_slot.h>
using namespace SigC;
using namespace std;
// Some procedures to connect to.
int foo1(int i)
{ cout<<"f("<<i<<");"<<endl;
return 1;}
int foo2(int i)
{ cout<<"sig2::f("<<i<<");"<<endl;
return 1;}
void foo1v(int i)
{ cout<<"fv("<<i<<");"<<endl;}
void foo2v(int i)
{ cout<<"sig2::fv("<<i<<");"<<endl;}
// (3) Objects which are to be connected must be derived from SigC::Object.
struct A : public Object
{
//public:
A() { }
int foo(int i)
{ cout<<"A::f("<<i<<");"<<endl; return 1; }
void foov(int i)
{ cout<<"A::fv("<<i<<");"<<endl; }
};
int main()
{
A a;
// (4) Signals can be declared anywhere, including as class members
// Their size is about that of 2 pointers.
// Signals contain their callback signature as template parameters.
// The number following it is the number of parameters, and the
// first argument is the return type.
//
// So to declare a signal called like int foo(int) would be
// Signal1< int, int> foo;
// Lets declare a few signals.
Signal1<int,int> sig1; // int sig1(int);
Signal1<int,int> sig2; // int sig2(int);
// The return type is allowed to be void.
Signal1<void,int> sig1v; // void sig(int);
Signal1<void,int> sig2v; // void sig2(int);
// (5) After the signals are declared you can establish
// connections between them and functions and methods.
cout << ">> Connect to signals "<< endl;
// Connect to function foo.
sig1.connect(slot(foo1));
// Connect to method foo of object a.
sig1.connect(slot(a,&A::foo)); //OJO DESCOMENTADA NO COMPILA !!!
// Connect to signal 1 to signal 2. Thus all things in signal2
// are also called.
//sig1.connect(sig2.slot()); DON'T WORK !!!
// We can do the same for the void signals.
sig1v.connect(slot(foo1v));
//sig1v.connect(slot(a,&A::foov)); DON'T WORK !!!
sig1v.connect(sig2v.slot());
sig2.connect(slot(foo2));
sig2v.connect(slot(foo2v));
// (6) After connection the signals can be "emitted".
// This calls all the callbacks stored within the signal.
// (Emits are generally called reverse of the order connected,
// however this is implementation specific.)
cout << ">> Emit signals "<< endl;
// Explicitly calling the emits.
sig1.emit(1);
//sig1v.emit(2);
// Or alternatively they can be called as a function object
// with operator()
sig1(1);
//sig1v(2);
return 0;
}
Do you have some working example with compilation instructions?
In advance, thank you very much.
Murray Cumming wrote:
> On Thu, 2007-10-18 at 22:42 +0100, [EMAIL PROTECTED] wrote:
>
>> I tried to compile "simple example" in the tutorial using the pkgconfig
>> command and the file provided for it. As under cygwin as under kubuntu,
>> it gives me the same problem with compiling. Thoroughly the
>> installation of the library(libsigc++2.0) has comen out without any
>> problems, and also the tests has been all passed. How do I can make a
>> simple compilation as for the hello_world example without using that
>> big makefile as in the example directory?
>> Many Thanks.
>>
>
> How are you trying to compile it, and what error are you seeing?
>
>
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