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DGD::channelbuf
is a basic class in the library. In fact, DGD is started from the single class. Channelbuf can be used as stand-alone std::streambuf for formatting output. Lets consider the example:
#include <dgChannelBuf.h>
#include <dgStream.h>
main( int argc, char** argv ) {
DGD::channelbuf formatter;
formatter.pubsetbuf( NULL, 100 );
formatter.assoc( &std::cout );
std::ostream formatting_stream( &formatter );
formatting_stream << "Hello! This is actally very very very "
<< "very very very very very very very very "
<< "very very very very very very very long line!"
<< std::endl;
return 0;
}
formatter.pubsetbuf( NULL, 100 );
Note that formatter makes no physical output, it just makes formatting. To achieve the physical output we must associate channelbuf with physical stream, for example std::cout: formatter.assoc( &std::cout );
Now, when the formatter is defined and associated with standard output we can make some output. But channelbuf can't do output itself. So we need an output stream: std::ostream formatting_stream( &formatter );
Hello! This is actally very very very very very very very very very very
very very very very very very very very long line!
Note how the formatter split the line in two. By default it has word wrapping turned on and maximum line length 79. You can easily change the defaults. Read the next chapter to learn that.
Generated on Thu Aug 10 16:48:29 2006 for DGD Library by  1.3
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