I've written a console application and would like to isolate all screen
output so that it will be easier to migrate the code to a GUI-type platform
without modification to the base code. As a first step, I've created a
variable:
bool useConsole(true );
then I trap all output like:
if(useConsole){
cout << text;
}
However, I realized that having these traps dispersed throught the code was
a little sloppy, so I wrote a function:
void display(string text; useConsole){
if(useConsole){
cout << text;
}
}
which leads to the somewhat cleaner code where I simply say:
display(text, useConsole);
However, I also have some places in the code where I do things like:
string temp = fname;
cout.precision( 4);
cout //<< "Success\t"
<< "Success\t"
<< setfill(' ')
<< setw(5)
<< static_cast<flo at>(clo)/CLOCKS_PER_SEC << " s\t"
<< ((temp.size() < 18) ? temp : temp.replace(7, (temp.size() - 17),
"\xaf")) // strip middle if too long to fit
<< endl;
My question--how can I dump this formatted output into a string that I can
then send to my display() function?
Thanks.
Merry Christmas 4 3563
Joe C wrote: However, I also have some places in the code where I do things like: string temp = fname; cout.precision( 4); cout //<< "Success\t" << "Success\t" << setfill(' ') << setw(5) << static_cast<flo at>(clo)/CLOCKS_PER_SEC << " s\t" << ((temp.size() < 18) ? temp : temp.replace(7, (temp.size() - 17), "\xaf")) // strip middle if too long to fit << endl;
Use a stringstream... it does exactly what you ask.
#include <sstream>
std::ostringstr eam sout;
sout.precision( 4);
sout << "Success\t" ...
display(sout.st r(), true);
"Ron Natalie" <ro*@sensor.com > wrote in message
news:41******** *************** @news.newshosti ng.com... Joe C wrote: Use a stringstream... it does exactly what you ask.
Thanks Ron. Merry Christmas
Joe C wrote: I've written a console application and would like to isolate all screen output so that it will be easier to migrate the code to a GUI-type platform without modification to the base code. As a first step, I've created a variable: bool useConsole(true ); then I trap all output like: if(useConsole){ cout << text; }
However, I realized that having these traps dispersed throught the code was a little sloppy, so I wrote a function: void display(string text; useConsole){ if(useConsole){ cout << text; } }
which leads to the somewhat cleaner code where I simply say: display(text, useConsole);
However, I also have some places in the code where I do things like: string temp = fname; cout.precision( 4); cout //<< "Success\t" << "Success\t" << setfill(' ') << setw(5) << static_cast<flo at>(clo)/CLOCKS_PER_SEC << " s\t" << ((temp.size() < 18) ? temp : temp.replace(7, (temp.size() - 17), "\xaf")) // strip middle if too long to fit << endl;
My question--how can I dump this formatted output into a string that I can then send to my display() function?
Since your question has already been answered, here's a suggestion. Why
not use a type which either derives from std::ostream or emulates it so
you can use it as an ordinary stream. You could use the standard
library's way by having a global stream object which gets initialized
somewhere safe.
MyStream out;
int main()
{
out.use_console (true);
out << "hello"; // on console with std::cout
out.use_console (false);
out.set_widget( &my_textbox) ;
out << "hello"; // appends text in my_textbox
}
Jonathan
Jonathan Mcdougall wrote: Since your question has already been answered, here's a suggestion. Why not use a type which either derives from std::ostream or emulates it so you can use it as an ordinary stream. You could use the standard library's way by having a global stream object which gets initialized somewhere safe.
MyStream out;
The best way to do this is to write your own streambuffer and make
MyStream derive from ostream, initializing with this strbuf. If you're
not worried about a lot of data going through, you can implmenet the
string buf with a single method:
int_type overflow(int_ty pe c) {
// do whatever you have to do to output the character
// in c here.
} This thread has been closed and replies have been disabled. Please start a new discussion. Similar topics |
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