C指针原理(62)-Ncurses-文本终端的图形
scr_dump() 函数可以把当前屏幕的内容存入指定文件，即以文件名作为函数的参数,而通过 scr_restore()函数调用屏幕数据文件来恢复屏幕。它们的函数调用方式为：
scr_dump(const char *file)
scr_restore(const char *file)
getwin()函数用来将窗口内容存储到一个指定的文件中。 putwin() 函数则调用相应的文件来恢复窗口。
它们的函数调用方式为：
getwin(FILE * filep)
putwin(WINDOW *win, FILE * filep)
麦好的AI乐园博客所有内容是原创，如果转载请注明来源
http://blog.csdn.net/myhaspl/
我们先利用scr_dump()与scr_restore()函数，实现将编辑器的内容存盘与读取，但是它会把整个屏幕保存下来。
设定F9读取，F10存盘，同时修改退出为F11，并加入对退格键的支持。
dp@dp:~/cursestest % cat a.c
#include <locale.h>
#include <stdio.h>
#include <ncurses.h>
//code by [email protected]
//date:2014/1/17
int isExist(char *filename)
{
return (access(filename, 0) == 0);
}
int main(int argc, char *argv[])
{
MEVENT event;
setlocale(LC_ALL,"");
initscr();
clear();
noecho();
cbreak();
if(has_colors() == FALSE)
{
endwin();
printf("你的终端不支持色彩！\n");
return (1);
}
start_color(); /*启动color 机制*/
mvprintw(3,COLS/2-10,"简单编辑器-仅限于单个屏幕的编辑");
mvprintw(4,COLS/2-15,"【F9读保存内容，F10存盘，F11退出，F12删除整行】");
refresh();
init_pair(1, COLOR_GREEN, COLOR_BLACK);
WINDOW *win1;
int width=COLS-14;
int height=LINES-14;
int x,y;
win1=newwin(height,width,7,7);//新窗口(行，列,begin_y,begin_x)
keypad(win1,TRUE);
wattron(win1,COLOR_PAIR(1));
box(win1,ACS_VLINE,ACS_HLINE);
wrefresh(win1);
getyx(win1,y,x);
++y;++x;
mmask_t oldmousemask;
int ans=0;
mousemask(ALL_MOUSE_EVENTS, &oldmousemask);
while(1){
int c=mvwgetch(win1,y,x);
switch(c)
{ case KEY_MOUSE:
if(getmouse(&event) == OK)
{ /* When the user clicks left mouse button */
if(event.bstate & BUTTON1_PRESSED)
{
y=event.y-7;x=event.x-7;
wmove(win1,y,x);
}
}
break;
case KEY_BACKSPACE:
--x;
if (x<1){
--y;x=width-2;
}
if (y<1){
y=height-2;
}
mvwprintw(win1,y,x," ");
break;
case KEY_RIGHT:
++x;
if (x>=width-1) {
++y;
x=1;
}
break;
case KEY_LEFT: --x;
if (x<1){
--y;
x=width-2;
}
break;
case KEY_UP:
--y;
if (y<1){
y=height-2;
}
break;
case KEY_DOWN:
++y;
if (y>=height-1){
y=1;
}
break;
case 10:
++y;
if (y>=height-1){
y=1;
}
break;
case KEY_F(11):
//退出
mvprintw(LINES-3,2," ");
mvprintw(LINES-3,2,"退出编辑器吗？ ");
mvprintw(LINES-2,2," ");
refresh();
ans=getch();
if (ans=='Y' ||ans=='y')
{
mvprintw(LINES-2,2,"是\n");
refresh();
return 0;
}else
mvprintw(LINES-2,2,"否\n");
refresh();
break;
case KEY_F(10):
//存盘
mvprintw(LINES-3,2," ");
mvprintw(LINES-3,2,"保存当前内容吗？ ");
mvprintw(LINES-2,2," ");
refresh();
ans=getch();
if (ans=='Y' ||ans=='y')
{
mvprintw(LINES-3,2," ");
scr_dump("myedit.dat");
mvprintw(LINES-3,2,"保存当前内容吗？ ");
mvprintw(LINES-2,2,"是\n");
refresh();
}else
mvprintw(LINES-2,2,"否\n");
refresh();
break;
case KEY_F(9):
//读取存盘
mvprintw(LINES-3,2," ");
mvprintw(LINES-3,2,"读取保存内容吗？ ");
mvprintw(LINES-2,2," ");
refresh();
ans=getch();
if (ans=='Y' ||ans=='y')
{
if (isExist("myedit.dat")) scr_restore("myedit.dat");
mvprintw(LINES-3,2,"读取保存内容吗？ ");
mvprintw(LINES-2,2,"是\n");
refresh();
}else
mvprintw(LINES-2,2,"否\n");
refresh();
break;
case KEY_F(12):
//删除某行
wdeleteln(win1);
winsertln(win1);
box(win1,ACS_VLINE,ACS_HLINE);
break;
case KEY_DC:
//删除某字符
mvwprintw(win1,y,x," ");
break;
default:
mvwprintw(win1,y,x,"%c",c);
++x;
if (x>=width-1){
++y;
x=1;
}
if (y>=height-1){
y=1;
}
wrefresh(win1);
}
}
wattroff(win1,COLOR_PAIR(1));
endwin();
mousemask(oldmousemask,NULL);
return 0;
}
执行
dp@dp:~/cursestest % gcc -lncursesw a.c -o mytest
dp@dp:~/cursestest % ./mytest
麦好的AI乐园博客所有内容是原创，如果转载请注明来源
http://blog.csdn.net/myhaspl/