实例11-4.c

Linux下C语言编程例子

#include <ncurses.h>

WINDOW *create_newwin(int height, int width, int starty, int startx);
void destroy_win(WINDOW *local_win);

int main(int argc, char *argv[])
{	WINDOW *my_win;
	int startx, starty, width, height;
	int ch;

	initscr();					/* 初始化并进入curses模式		*/
	cbreak();					/* 行缓冲禁止，传递所有控制信息	*/
	keypad(stdscr, TRUE);		/* 程序需要使用F1功能键 		*/

	height = 3;
	width = 10;
	starty = (LINES - height) / 2;	/*计算窗口中心位置的行数 */
	startx = (COLS - width) / 2;		/*计算窗口中心位置的列数	*/
	printw("Press F1 to exit");
	refresh();
	my_win = create_newwin(height, width, starty, startx);

	while((ch = getch()) != KEY_F(1))
	{	switch(ch)
		{	case KEY_LEFT:
				destroy_win(my_win);
				my_win = create_newwin(height, width, starty,--startx);
				break;
			case KEY_RIGHT:
				destroy_win(my_win);
				my_win = create_newwin(height, width, starty,++startx);
				break;
			case KEY_UP:
				destroy_win(my_win);
				my_win = create_newwin(height, width, --starty,startx);
				break;
			case KEY_DOWN:
				destroy_win(my_win);
				my_win = create_newwin(height, width, ++starty,startx);
				break;	
		}
	}
		
	endwin();			/*结束 curses模式	*/
	return 0;
}

WINDOW *create_newwin(int height, int width, int starty, int startx)
{	
WINDOW *local_win;
	local_win = newwin(height, width, starty, startx);
	box(local_win, 0 , 0);	/* 0, 0是字符默认的行列起始位置 */
	wrefresh(local_win);	/*刷新窗口缓冲，显示 box 	box将再后面做详细的介绍   */
	return local_win;
}

void destroy_win(WINDOW *local_win)
{/* box(local_win, ' ', ' ');不会按照预期的那样清除窗口边框。 而是在窗口的四个角落留下残余字符*/
	wborder(local_win, ' ', ' ', ' ',' ',' ',' ',' ',' ');
	/*参数注解： 
	 * 1. win:当前操作的窗口
	 * 2. ls:用于显示窗口左边界的字符 
	 * 3. rs:用于显示窗口右边界的字符 
	 * 4. ts:用于显示窗口上边界的字符 
	 * 5. bs:用于显示窗口下边界的字符 
	 * 6. tl:用于显示窗口左上角的字符
	 * 7. tr:用于显示窗口右上角的字符
	 * 8. bl:用于显示窗口左下角的字符
	 * 9. br:用于显示窗口右下角的字符
	 */
	wrefresh(local_win);
	delwin(local_win);
}