www.pudn.com > fenxin.rar > PIC1.C

#include "graphics.h" 
#include "stdlib.h" 
#include "stdio.h" 
#include "fcntl.h" 
#include "dos.h" 
union REGS r; 
 
struct MOUSE{ 
int getit; 
int x1; 
int y1; 
int x2; 
int y2; 
}ms; 
void MSB(float,float,float,float,int,int,int,int,int); 
void mouse_drop(struct MOUSE *in);/*定义鼠标拖动的函数,通过鼠标的按下、放开来选定一个矩形区域*/ 
int data_processor(struct MOUSE m,float *x0,float *x1,float *y0,float *y1); 
    /*将鼠标选定的区域转化成MSB集的区域*/ 
 
void mouse_IQR(int *num,int *bx,int *cx,int *dx) 
{/*调用鼠标的中断，在这里定义函数让下面一些函数调用，以减少编程的重复， 
   在这里，通过int86函数（在dos.h里）调用中断，鼠标的中断号为：33h */ 
r.x.ax=*num; 
r.x.bx=*bx; 
r.x.cx=*cx; 
r.x.dx=*dx; 
int86(0x33,&r,&r); 
*bx=r.x.bx; 
*cx=r.x.cx; 
*dx=r.x.dx; 
*num=r.x.ax; 
} 
 
 
int init_mouse() 
{ 
/*初试化鼠标，查询鼠标驱动有没有安装，功能号为 0 */ 
int num=0; 
mouse_IQR(&num,&num,&num,&num); 
if(num!=-1) 
	return 1; 
else return 0; 
} 
 
void mouse_show(); 
void mouse_position(int *x,int *y) 
{/*鼠标在屏幕中所处的位置*/ 
int button=0,num=3; 
mouse_show(); 
mouse_IQR(&num,&button,x,y); 
} 
 
void mouse_hide() 
{/*隐藏鼠标光标*/ 
int num=2; 
mouse_IQR(&num,&num,&num,&num); 
} 
 
void mouse_show() 
{/*显示鼠标光标*/ 
int num=1; 
mouse_IQR(&num,&num,&num,&num); 
} 
 
int mouse_click(int k) 
{/*查询鼠标是使用左键（返回1）还是右键（返回2）*/ 
int bx=0,num=3; 
mouse_IQR(&num,&bx,&num,&num); 
return(bx&k); 
} 
 
void waiton(int buttom) 
{/*等待鼠标动作*/ 
if(buttom==1) 
while(mouse_click(1)); 
if(buttom==2) 
while(mouse_click(2)); 
} 
 
int mousexy(int x1,int y1,int x2,int y2) 
{/*查询鼠标是否在区域内*/ 
int x,y; 
mouse_position(&x,&y); 
if(x>x1&&xy1&&yL||m<-1e10) break; 
	      x=xx; 
	      y=yy; 
	      } 
	      color=n%16; 
	      putpixel(x1+i,y1+j,color); 
 
	} 
} 
} 
void mouse_drop(struct MOUSE *in) 
{ 
char out[20]; 
int x,y; 
int oldx,oldy; 
struct MOUSE r; 
r=*in; 
setwritemode(1); 
setlinestyle(USERBIT_LINE,0x7777,1); 
setcolor(15); 
if(r.getit==1) 
	{ 
	mouse_hide(); 
	rectangle(r.x1,r.y1,r.x2,r.y2); 
	mouse_show(); 
	} 
mouse_position(&x,&y); 
r.x1=x; 
r.y1=y; 
oldx=x; 
oldy=y; 
r.getit=1; 
mouse_hide(); 
rectangle(x,y,x,y); 
mouse_show(); 
while(mouse_click(1)) {mouse_position(&x,&y); 
	if(oldx!=x || oldy!=y){ 
		mouse_hide(); 
		rectangle(r.x1,r.y1,x,y); 
		rectangle(r.x1,r.y1,oldx,oldy); 
		mouse_show(); 
                oldx=x; 
		oldy=y; 
		} 
	if(mouse_click(2)){ 
		r.getit=0; 
		mouse_hide(); 
		rectangle(r.x1,r.y1,oldx,oldy); 
		mouse_show(); 
		waiton(2); 
		break;} 
	} 
if(r.getit==1){ 
r.x2=x; 
r.y2=y; 
if(x==r.x1 && r.y1==y) 
	r.getit=0; 
	else 
	r.getit=1; 
} 
setlinestyle(SOLID_LINE,0,1); 
*in=r; 
waiton(1); 
setwritemode(0); 
setmouse(0,0,getmaxx(),getmaxy()); 
} 
 
int data_processor(struct MOUSE m,float *x0,float *x1,float *y0,float *y1) 
{ 
float d1,l1,d2,l2,d,l; 
float xx0,xx1,yy0,yy1,x,y; 
d1=*x1-*x0; 
l1=*y1-*y0; 
d2=637; 
l2=477; 
xx0=m.x1; 
xx1=m.x2; 
yy0=m.y1; 
yy1=m.y2; 
if(xx0==xx1 || yy0==yy1) return(0); 
if(xx0>xx1) 
	{x=xx0; 
	xx0=xx1; 
	xx1=x; 
	} 
if(yy0>yy1) 
	{x=yy0; 
	yy0=yy1; 
	yy1=x; 
	} 
d=1; 
l=1; 
x=*x0; 
y=*y0; 
*x0=x+(xx0-d)*d1/d2; 
*x1=x+(xx1-d)*d1/d2; 
*y0=y+(yy0-l)*l1/l2; 
*y1=y+(yy1-l)*l1/l2; 
if(*x0==*x1 || *y0==*y1) 
   return(0); 
else 
   return(1); 
}