minigui增加tslib触摸屏响应

1、修改minigui库中IAL的输入引擎，增加对触摸屏的操作

        定义： static struct tsdev *ts;

         打开：

             ts = ts_open ("/dev/input/event0", 0);

             ts_config(ts);

         关闭：

              ts_close(ts)；

         读取：

        int   fd = ts_fd(ts); 

        if ((which & IAL_MOUSEEVENT) && fd >= 0) 

        {
           printf("which is %d ",which);
              FD_SET (fd, in);
        }
      e = select (FD_SETSIZE, in, out, except, timeout) ;
       if (e > 0)
       {        
             if (fd > 0 && FD_ISSET (fd, in))
               {
                   FD_CLR (fd, in);
                   ts_event.x=0;
                  ts_event.y=0;
                  ret = ts_read(ts, &sample, 1);
                  if (ret < 0)
                  {
                        perror("ts_read()");
                        exit(-1);
                  }
                  ts_event.x = sample.x;
                  ts_event.y = sample.y;
                  ts_event.pressure = (sample.pressure > 0 ? 4:0);
                  ret |= IAL_MOUSEEVENT;
                  return (ret);
   }

2、编译minigui库时，增加tslib库的头文件和路径

./configure CC=arm-linux-gcc --build=i686-pc-linux --target=arm-linux --host=arm-linux --disable-galqvfb --disable-galecoslcd --
disable-vbfsupport --prefix=/usr/local/arm/3.4.1/arm-linux CFLAGS="-I/usr/local/arm/3.4.1/arm-linux/include -L/usr/local/arm/3.4.1/arm-linux/lib -lts"

3、应用程序中，增加 MSG_LBUTTONDOWN   MSG_LBUTTONUP消息响应，进行测试