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EDITOR.C

+#include<graphics.h>
+#include<dos.h>
+#include<math.h>
+#include "edfile.c"
+//#include<stdlib.h>
+#include<stdio.h>
+#include<conio.h>
+
+union REGS i, o;
+int leftcolor[15];
+
+double bez(double t,int p[],int a,int b)
+{
+    if(a==b)
+	return p[a];
+    else
+	return (1-t)*bez(t,p,a,b-1)+t*bez(t,p,a+1,b);
+}
+
+int get_key()
+{
+   union REGS i,o;
+
+   i.h.ah = 0;
+   int86(22,&i,&o);
+
+   return ( o.h.ah );
+}
+
+void draw_color_panel()
+{
+   int left, top, c, color;
+
+   left = 5;
+   top = 215;
+
+   color = getcolor();
+   setcolor(BLACK);
+   outtextxy(left,top,"color");
+   outtextxy(left,top+15,"palette");
+   top+=30;
+   for( c = 1 ; c <= 16 ; c+=2 )
+   {
+      setfillstyle(SOLID_FILL, c);
+      bar(left, top, left+20, top+20);
+      rectangle(left, top, left+20, top+20);
+      setfillstyle(SOLID_FILL, c+1);
+      bar(left+30, top, left+50, top+20);
+      rectangle(left+30, top, left+50, top+20);
+      leftcolor[c-1] = left;
+      top+=30;
+   }
+
+   setcolor(color);
+}
+
+void draw_shape_panel()
+{
+   int left, top, c, color,points[]={15,157,7,173,15,165,23,173,15,157};
+
+   left = 5;
+   top = 5;
+
+   color = getcolor();
+   setfillstyle(SOLID_FILL,LIGHTGRAY);
+   bar(1,1,60,480);
+  // bar(100,100,200,200);
+   setcolor(BLACK);
+   outtextxy(left,top,"Tools");
+   top+=30;
+   for( c = 1 ; c <= 11 ; c+=2 )
+   {
+	rectangle(left, top, left+20, top+20);
+	rectangle(left+30, top, left+50, top+20);
+      top += 30;
+   }
+   setfillstyle(SOLID_FILL,BLACK);
+   bar(7,40,23,50);
+   rectangle(37,40,53,50);
+   line(7,83,22,68);
+   line(37,83,43,73);
+   line(43,73,45,73);
+   line(45,73,47,76);
+   line(47,76,49,76);
+   line(49,76,53,68);
+   fillellipse(15,105,8,6);
+   ellipse(45,105,0,360,8,6);
+   fillellipse(15,135,7,7);
+   ellipse(45,135,0,360,7,7);
+   fillpoly(5,points);
+   for(c=0;c<=8;c+=2)
+   {
+	points[c]+=30;
+   }
+   drawpoly(5,points); //5  185
+   line(7,203,12,187);
+   line(12,187,18,187);
+   line(18,187,23,203);
+   setfillstyle(SOLID_FILL,WHITE);
+   bar(38,189,52,200);
+  // erase();
+   setcolor(color);
+}
+
+void change_color(int x, int y)
+{
+   int c,left=5,top=245;
+ //  printf("H");
+ //  line(left,top,left+50,top);
+   for( c = 1 ; c <= 16 ; c+=2 )
+   {
+      if( x > left && x < left+20 && y > top && y < top+20 )
+      {	 setcolor(c); break;  }
+      if( x > left+30 && x < left+50 && y > top && y < top+20 )
+      {	 setcolor(c+1); break;  }
+      top+=30;
+   }
+}
+
+char change_shape(int x, int y)
+{
+   int c,left,top;
+   char flag='a';
+   left = 5;
+   top = 35;
+   for( c = 1 ; c <= 11 ; c+=2,flag+=2)
+   {
+	if(x>left && y>top && x<left+20 && y<top+20)
+		return flag;
+	if(x>left+30 && y>top && x<left+50 && y<top+20)
+		return flag+1;
+	top += 30;
+   }
+   return flag;
+}
+
+void showmouseptr()
+{
+   i.x.ax = 1;
+   int86(0x33,&i,&o);
+}
+
+void hidemouseptr()
+{
+   i.x.ax = 2;
+   int86(0x33,&i,&o);
+}
+
+void restrictmouseptr( int x1, int y1, int x2, int y2)
+{
+   i.x.ax = 7;
+   i.x.cx = x1;
+   i.x.dx = x2;
+   int86(0x33,&i,&o);
+
+   i.x.ax = 8;
+   i.x.cx = y1;
+   i.x.dx = y2;
+   int86(0x33,&i,&o);
+}
+
+void getmousepos(int *button,int *x,int *y)
+{
+   i.x.ax = 3;
+   int86(0x33,&i,&o);
+
+   *button = o.x.bx;
+   *x = o.x.cx;
+   *y = o.x.dx;
+}
+
+main()
+{
+   int gd = DETECT,gm;
+   dp* temp;int maxx,maxy,x,y,button,prevx,prevy,temp1,temp2,key,color,points[50];
+   int step,j,l,k,arrx[30],arry[30];
+   char ch = 'a' ;
+   int i,signdx,signdy;
+   float len,abx,aby,dx,dy,xx,yy;
+   double size,t,xi,yi;
+
+   initgraph(&gd,&gm,"..//BGI");
+
+   maxx = getmaxx();
+   maxy = getmaxy();
+
+   setcolor(WHITE);
+   rectangle(0,0,maxx,maxy);
+
+   setcolor(YELLOW);
+ /*  settextstyle(SANS_SERIF_FONT,HORIZ_DIR,2);
+   outtextxy(maxx/2-120,maxy-23,"*** DRAWING WINDOW ***");
+  */
+
+   draw_shape_panel();
+   draw_color_panel();
+   setviewport(1,1,maxx-1,maxy-1,1);
+
+   restrictmouseptr(1,1,maxx-1,maxy-1);
+   showmouseptr();
+   setcolor(BLUE);
+   setfillstyle(SOLID_FILL,15);
+   bar(60,1,640,480);
+   setviewport(60,2,639,479,1);
+
+  temp= openeditor();
+   while(1)
+   { // printf("d");
+      if(kbhit())
+      {
+	 key = get_key();
+
+	 if( 1 )
+	 {
+	    closegraph();
+	    closeeditor();
+	    exit(0);
+	 }
+      }
+
+      getmousepos(&button,&x,&y);
+
+      if( button == 1 )
+      {
+	 if( x > 1 && x < 60 && y > 1 && y < 245 )
+	    ch = change_shape( x, y );
+	 else if ( x > 1 && x < 60 && y > 245 && y < 480 )
+	     change_color( x, y );
+
+	 temp1 = x ;
+	 temp2 = y ;
+       //	 printf("%c",ch);
+	 if ( ch == 'd' )
+	 { // printf("j");
+	    hidemouseptr();
+	    moveto(x-60,y);
+	    temp=saveeditor(temp,0,getcolor(),x-60,y);
+	    while( button == 1 )
+	    {
+	       line(temp1-60,temp2,x-60,y);
+	       temp=saveeditor(temp,4,getcolor(),x-60,y);
+	       temp1 = x;
+	       temp2 = y;
+	       getmousepos(&button,&x,&y);
+	    }
+	    showmouseptr();
+	 }
+
+	 while( button == 1)
+	 { //printf("k");
+	    getmousepos(&button,&x,&y);
+	 }
+	 /* to avoid interference of mouse while drawing */
+	 hidemouseptr();
+
+	 if ( ch == 'a' )
+	 {  //         printf("D");
+	    setfillstyle(SOLID_FILL,getcolor());
+	    bar(temp1-60,temp2,x-60,y);
+	 }
+	 else if ( ch == 'c')
+	 {
+		line(temp1-60,temp2,x-60,y);
+	 }
+	 else if ( ch == 'f')
+	    ellipse(temp1-60,temp2,0,360,abs(x-temp1),abs(y-temp2));
+	 else if(ch == 'e' )
+	 {
+		setfillstyle(SOLID_FILL,getcolor());
+		fillellipse(temp1-60,temp2,abs(x-temp1),abs(y-temp2));
+	 }
+	 else if(ch == 'g' )
+	 {
+		setfillstyle(SOLID_FILL,getcolor());
+		fillellipse(temp1-60,temp2,abs(x-temp1),abs(x-temp1));
+	 }
+	 else if(ch == 'h' )
+	    ellipse(temp1-60,temp2,0,360,abs(x-temp1),abs(x-temp1));
+	 else if ( ch == 'b' )
+	    rectangle(temp1-60,temp2,x-60,y);
+	 else if ( ch == 'l' )
+	 {
+	    ch = 'a';          // setting to freehand drawing
+	    clearviewport();
+	    color = getcolor();
+	    setcolor(WHITE);
+	    setfillstyle(SOLID_FILL,15);
+	    bar(0,0,640,480);
+	    setcolor(color);
+	    removeall();
+	 }
+	 else if(ch == 'j' || ch == 'i' || ch == 'k' )
+	 {      i=0; //xx=-1; delay(10);
+		while(1)
+		{     //  restrictmouseptr(60,2,639,479);
+			if(kbhit())
+			{
+				key = get_key();
+
+				if( key == 1 )
+				{
+				closegraph();
+				exit(0);
+				}
+			}
+			showmouseptr();
+			getmousepos(&button,&x,&y);
+			if(button==1)
+			{// printf("G");
+		     //	printf("%d%d",xx,i);
+			while(button==1)
+				getmousepos(&button,&x,&y);
+			  //   if(xx==i)continue;
+		       //	     printf("g");      hidemouseptr;
+				if(i!=0)
+				{
+					if(abs(x-60-points[0])<4 && abs(y-points[1])<4)
+					{        //            printf("h");
+						points[i]=points[0];
+						points[i+1]=points[1]; // printf("%d%d",points[i],points[i+1]);
+						i+=2;
+						hidemouseptr();
+					       //	printf("i/2=%d",i/2);
+					       if(ch == 'j')
+							drawpoly(i/2,points);
+					       else if(ch == 'i') {
+							setfillstyle(SOLID_FILL,getcolor());
+							fillpoly(i/2,points);
+					       }
+					       else
+					       {
+					      // setfillstyle(SOLID_FILL,WHITE);
+					      // fillpoly(i/2,points);
+
+					       step=500;
+					       size=1.0/(double)step;
+					       l=0;
+					       k=getcolor();
+					       setcolor(WHITE);
+					       for(j=0;j<i;j+=2)
+					       {
+						line(points[j],points[j+1],points[j+2],points[j+3]);
+					       }
+					       setcolor(k);
+					       for(k=0;k<=i;k+=2)
+					       {
+					       arrx[l]=points[k];
+					       arry[l]=points[k+1];
+
+					       l++;
+					       }
+					       moveto(arrx[0],arry[0]);
+					       temp=saveeditor(temp,0,getcolor(),arrx[0],arry[0]);
+					       //printf("%d %d",arrx[0],arry[0]);
+					       for(j=1;j<step;j++)
+					       {
+					       t=size*(double)j;
+					       //printf("%df",t);
+					       xi=bez(t,arrx,0,i/2-2);
+					       yi=bez(t,arry,0,i/2-2);
+					       //if(j<10)
+					      //printf("%f%f ",xi,yi);
+					       lineto(xi,yi);
+					       temp=saveeditor(temp,1,getcolor(),xi,yi);
+					       }
+
+					       }
+						break;
+					}
+					else
+					{
+					 points[i]=x-60;
+					points[i+1]=y;
+				     //	if(ch!='k')
+					line(points[i],points[i+1],points[i-2],points[i-1]);
+					i+=2;  }
+				}
+				else {
+				points[i]=x-60;
+				points[i+1]=y;
+
+				i+=2;   }
+			}// xx=i;
+		} i=0;
+	 }
+	 showmouseptr();
+      }
+   }
+}
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