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<![CDATA[#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);}]]> 源代码网供稿. |
