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Test program for wscrl(), wdeleteln(), winsertln(), and winsdelln(). …
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#include <curses.h> | ||
#include <assert.h> | ||
#include <stdlib.h> | ||
#include <stdio.h> | ||
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/* Program to test the insertln()/deleteln()/wscrl() functions. | ||
Prompted by https://github.com/wmcbrine/PDCurses/issues/165 . | ||
gcc -Wall -Wextra -pedantic -o ins_del ins_del.c -lncursesw */ | ||
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int main( ) | ||
{ | ||
SCREEN *screen_pointer; | ||
WINDOW *win; | ||
int i, c = 0, cursor_y = 7; | ||
int top_scroll = 3, bottom_scroll = 10; | ||
int scroll_rate = 1; | ||
int rval; | ||
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screen_pointer = newterm(NULL, stdout, stdin); | ||
noecho( ); | ||
raw( ); | ||
start_color( ); | ||
mvprintw( 0, 0, "Test of insertln(), deleteln(), wscrl()"); | ||
mvprintw( 1, 0, "Up/down to move cursor up/down; 'i'/'d' to insert/delete line"); | ||
mvprintw( 2, 0, "'u' to scroll up, 's' to scroll down _within marked region_"); | ||
mvprintw( 3, 0, "Any number 0...9 to set number of lines to scroll"); | ||
mvprintw( 4, 0, "'q' to quit"); | ||
mvaddstr( 6 + top_scroll, 0, "Top scroll->"); | ||
mvaddstr( 6 + bottom_scroll, 0, "Bottom scroll->"); | ||
refresh( ); | ||
win = newwin( 14, 30, 6, 16); | ||
init_pair( 1, COLOR_WHITE, COLOR_BLUE); | ||
wbkgd( win, '.' | COLOR_PAIR( 1)); | ||
scrollok( win, TRUE); | ||
/* For PDCurses, the cursor must be within the scroll region */ | ||
/* you're setting. For ncurses and PDCursesMod, it doesn't. */ | ||
#if defined( __PDCURSES__) && !defined( __PDCURSESMOD__) | ||
wmove( win, top_scroll, 0); | ||
#endif | ||
rval = wsetscrreg( win, top_scroll, bottom_scroll); | ||
assert( rval == OK); | ||
wclear( win); | ||
for( i = 0; i < 14; i++) | ||
mvwprintw( win, i, 0, "This is line %d", i); | ||
keypad( win, TRUE); | ||
while( c != 'q') | ||
{ | ||
wmove( win, cursor_y, 1); | ||
wsyncup( win); | ||
wrefresh( win); | ||
c = wgetch( win); | ||
if( c >= '0' && c <= '9') | ||
scroll_rate = c - '0'; | ||
else switch( c) | ||
{ | ||
case KEY_UP: | ||
cursor_y--; | ||
break; | ||
case KEY_DOWN: | ||
cursor_y++; | ||
break; | ||
case 'i': | ||
winsertln( win); | ||
break; | ||
case 'd': | ||
wdeleteln( win); | ||
break; | ||
case 's': | ||
wscrl( win, -scroll_rate); | ||
break; | ||
case 'u': | ||
wscrl( win, scroll_rate); | ||
break; | ||
case 'D': | ||
winsdelln( win, -scroll_rate); | ||
break; | ||
case 'I': | ||
winsdelln( win, scroll_rate); | ||
break; | ||
} | ||
} | ||
endwin(); | ||
/* Not really needed, but ensures Valgrind */ | ||
delscreen( screen_pointer); /* says all memory was freed */ | ||
return( 0); | ||
} |