2
我想在ncurses中獲得一個窗口,我在其中編寫mysql-query的結果。但是查詢返回的行數比我在終端中的多。 所以我試圖創建一個墊,以便我可以滾動結果。使用ncurses pad在C中滾動
但問題是,我的終端上沒有可見的焊盤。
我只是簡化了代碼,但它仍然沒有工作對我來說:
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <ncurses.h>
#include <mysql.h>
#include <my_global.h>
WINDOW *pad;
MYSQL *con;
static int mrow, mcol;
static char *host, *user, *pass;
void quit(void)
{
// close MySQL connection
mysql_close(con);
// end curses
endwin();
}
int main(int argc, char **argv)
{
// initialize curses
initscr();
atexit(quit);
clear();
cbreak();
keypad(stdscr, TRUE);
start_color();
// get terminal size
getmaxyx(stdscr, mrow, mcol);
// open MySQL connection
host = "localhost";
user = "root";
pass = "8$oP.4L!";
con = mysql_init(NULL);
if (con == NULL)
{
exit(1);
}
if (mysql_real_connect(con, host, user, pass, NULL, 0, NULL, 0) == NULL)
{
mysql_close(con);
exit(1);
}
// Cursor off
curs_set(0);
// Get SQL Data
char *query = "SELECT IF((SELECT name FROM zeiterf.stdjobs WHERE nr = zeiterf.wtime.job) != '', (SELECT name FROM zeiterf.stdjobs WHERE nr = zeiterf.wtime.job), job), IF(usr != '', (SELECT vname FROM zeiterf.user WHERE nr = zeiterf.wtime.usr), NULL), IF(usr != '', (SELECT nname FROM zeiterf.user WHERE nr = zeiterf.wtime.usr), NULL), SEC_TO_TIME(SUM(TIME_TO_SEC(tout) - TIME_TO_SEC(tin))) FROM zeiterf.wtime WHERE tout != 0 AND job != '...ENDE' GROUP BY job , usr WITH ROLLUP;";
if (mysql_query(con, query))
{
exit (1);
}
MYSQL_RES *result = mysql_store_result(con);
MYSQL_ROW *row;
int num_fields = mysql_num_fields(result);
int rowcount = mysql_num_rows(result);
// create pad
pad = newpad (rowcount + 1, mcol);
// col titles
wprintw(pad, "Auftrag \tName \t\t\tZeit\n");
while (row = mysql_fetch_row(result))
{
int i = 0;
for (i = 0; i < num_fields; i++)
{
wprintw(pad, "%s\t", row[i]);
}
wprintw(pad, "\n");
}
mysql_free_result(result);
// Show content of pad
int mypadpos = 0;
prefresh(pad, mypadpos, mcol, 0, 0, mrow, mcol);
// wait for exit key
int ch;
while((ch = wgetch(pad)) != 'q')
{
switch (ch)
{
case KEY_UP:
if (mypadpos >= 0)
{
mypadpos--;
}
prefresh(pad, mypadpos, mcol, 0, 0, mrow, mcol);
break;
case KEY_DOWN:
if (mypadpos <= rowcount+1)
{
mypadpos++;
}
prefresh(pad, mypadpos, mcol, 0, 0, mrow-1, mcol);
break;
}
}
// remove window
delwin(pad);
clear();
refresh();
return (0);
}
我的Debian希德系統上編譯
gcc -o test testpad.c `mysql_config --libs --cflags` -lncurses
。也嘗試在我的RPi與raspbian。在兩個系統上的行爲都一樣
誰能告訴我我做錯了什麼?