Hi all,
Sorry for the out-of-context question but cudnt locate a more appropriate mailin list.
I am developing a C code to be integrated with GRASS that makes use of ncurses.
The program needs to open a text file and scroll down if the
number of lines in the file exceeds the screen size.
Though I am able to scroll up and down succesfully ( by making use of scrl() function) I lose the text below and above the cursor respectively.
How do i maintain continuity while displaying the file ?
Following is the code that i use.
if(ch == KEY_F(9)) //To display file contents and scroll
{
werase(stdscr);
max_i=0;
file_read=fopen("session.txt","r");
printw("\n");
do{
c = fgets(oneline,300,file_read);
max_i++;
if (c != NULL)
printw("%s",oneline);
}while (c != NULL);
max_ch= getch();
while(max_ch == KEY_UP || max_ch == KEY_DOWN)
{
switch(max_ch)
{
case KEY_DOWN:
scrl(1); //scroll down by one line
refresh();
break;
case KEY_UP:
scrl(-1); //scroll up by one line
refresh();
break;
default:
break;
}
max_ch =getch();
}
fclose(file_read);
}
I have also initialised the necessary curses functions for scrolling. they are :
idlok (stdscr, TRUE);
scrollok(stdscr,TRUE);
scroll(stdscr);
Any pointers ???
Vidya Kotamraju.
--
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Maybe this world is another planet's Hell.
-Aldous Huxley
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Kotamraju Vidya
Marine HydroDynamics Lab,
Physical Oceanography Division,
National Institute of Oceanography,
Dona Paula, Goa 403 004, India.
Ph.: +91-832-2456700 *4400 (O)
+91-832-2541756 (R)
e-mail: vidyakr@darya.nio.org