Drawing Pad - An Easy way to create circles,rectangles etc. (Mini Project) - Beginners / Lab Assignments Source Code in C++

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Home » C++ Home » Beginners / Lab Assignments Home » Drawing Pad - An Easy way to create circles,rectangles etc. (Mini Project)

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Title	Drawing Pad - An Easy way to create circles,rectangles etc. (Mini Project)
Author	Sandeep Jain
Author Email	sandeepjain88 [at] hotmail.com
Description	An Easy way to create circles,rectangles etc.
Category	C++ » Beginners / Lab Assignments
Hits	372950
Code	Select and Copy the Code
#include<iostream.h> #include<stdio.h> #include<string.h> #include<string.h> #include<stdlib.h> #include<graphics.h> #include<conio.h> #include<dos.h> #include<fstream.h> class mouse { union REGS i, o; public: mouse() { initmouse(); showmouseptr(); } void initmouse() { i.x.ax=0; int86(0x33,&i,&o); } void showmouseptr() { i.x.ax=1; int86(0x33,&i,&o); } void hidemouseptr() { i.x.ax=2; 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; } 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); } }; class shapes { public: virtual void draw() { } virtual void save (ofstream &ft) { } virtual void open(ifstream &fs) { } }; class myline:public shapes { int sx,sy,ex,ey,color; public: myline() { } myline(int x1,int y1,int x2,int y2,int clr) { sx=x1; sy=y1; ex=x2; ey=y2; color=clr; } void draw() { setcolor(color); moveto(sx,sy); lineto(ex,ey); } void save(ofstream &ft) { ft<<"L"<<" "; ft<<sx<<" "<<sy<<" "<<ex<<" "<<ey<<" "<<color<<" "; } void open(ifstream &fs) { fs>>sx>>sy>>ex>>ey>>color; } }; class myrectangle:public shapes { int sx,sy,ex,ey,color; public: myrectangle() { } myrectangle(int x1,int y1,int x2,int y2,int clr) { sx=x1; sy=y1; ex=x2; ey=y2; color=clr; } void draw() { setcolor(color); rectangle(sx,sy,ex,ey); } void save(ofstream &ft) { ft<<"R"<<" "; ft<<sx<<" "<<sy<<" "<<ex<<" "<<ey<<" "<<color<<" "; } void open(ifstream &fs) { fs>>sx>>sy>>ex>>ey>>color; } }; class mycircle:public shapes { int sx,sy,radius,color; public: mycircle() { } mycircle(int x1,int y1,int r,int clr) { sx=x1; sy=y1; radius=r; color=clr; } void draw() { setcolor(color); circle(sx,sy,radius); } void save(ofstream &ft) { ft<<"C"<<" "; ft<<sx<<" "<<sy<<" "<<radius<<" "<<color<<" "; } void open(ifstream &fs) { fs>>sx>>sy>>radius>>color; } }; struct node { void obj; node link; }; class objarray { node head; public: objarray() { head =NULL; } void add(void o) { node temp =new node; temp->obj=o; temp->link=NULL; if(head==NULL) head=temp; else { node q; q=head; while(q->link!=NULL) q=q->link; q->link=temp; } } void getobj(int i) { node q; q=head; for(int n=1; n<i;n++) q=q->link; return(q->obj); } int getcount() { int n=0; node q; q=head; while(q!=NULL) { q=q->link; n++; } return n; } ~objarray() { node q; q=head; while(q!=NULL) { head=head->link; delete q; q=head; } } }; void mainscreen() { cleardevice(); rectangle(0,0,639,479); line(0,30,640,30); char names[]={"Clear","Open","Save","Line","Rect","Circ","Exit"}; int x,i; for(x=5,i=0;x<=790;x+=90,i++) { setcolor(WHITE); rectangle(x,5,x+70,25); floodfill(x+1,6,WHITE); settextstyle(1,0,3); setcolor(BLACK); outtextxy(x+10,0,names[i]); } } void DisplayName(int ycor) { char name[] = {"D","R","A","W","I","N","G"," ","P","A","D"}; int i; settextjustify(1,1); settextstyle(4,0,7); for(i=0;i<11;i++) { setcolor(i+2); outtextxy(40+i45,ycor, name[i]); } } music() { int i ; float octave[7] = { 830.81, 846.83, 864.81, 674.61, 596, 420, 1046.94 } ; for ( i = 0 ; i < 7 ; i++ ) { sound ( octave[i] * 5 ) ; delay ( 30 ) ; } nosound(); } void Welcome() { char pattern[8] = {0x00, 0x70, 0x12, 0x27, 0x00, 0x27, 0x20, 0x70}; int i; setfillpattern(pattern,BLUE); for(i=0;i<=320;i++) { bar(320-i,240-i0.75,320+i,240+i0.75); delay (0.3) ; } settextjustify(1,1); DisplayName(100); settextstyle(5,0,4); outtextxy(100,300,"By :-"); settextstyle(7,0,6); setcolor(11); outtextxy(320,350,"Sandee Jain"); music(); delay(1000); } void main() { ifstream fs; ofstream ft; int gd= DETECT,gm; initgraph(&gd,&gm,"C:\tc\bgi"); mainscreen(); music(); setviewport(1,31,638,478,1); mouse m; int button,x,y,flag=0; int t,i,index; int strptx,strpty,endptx,endpty; objarray arr; while(1) { button=0; m.getmousepos(button,x,y); if(((button &1)==1)&&(flag==0)) for(t=5,i=0;t<=790;t+=90,i++) if(x>=t && x<=t+70 && y>=5 && y<=25) { index=i; flag=1; break; } int clmum=random(16); int sx=random(638); int sy=random(478); int ex=random(638); int ey=random(478); int r=random(200); switch(index) { case 0: m.getmousepos(button,x,y); if(((button &1)==0)&&(flag==1)) { clearviewport(); flag=0; } break; case 1: m.getmousepos(button,x,y); if(((button &1)==0)&&(flag==1)) { fs.open("output.txt",ios::in); shapes ptr; char a[2]; while(fs) { fs>>a; if(strcmp(a,"L")==0) { myline l=new myline(); l->open(fs); arr.add(l); } if(strcmp(a,"R")==0) { myrectangle r=new myrectangle(); r->open(fs); arr.add(r); } if(strcmp(a,"C")==0) { mycircle c=new mycircle(); c->open(fs); arr.add(c); } } fs.close(); int count=arr.getcount(); for(int i=1;i<=count;i++) { ptr=(shapes)arr.getobj(i); ptr->draw(); } flag=0; } break; case 2: m.getmousepos(button,x,y); if(((button &1)==0)&&(flag==1)) { ft.open("output.txt",ios::out); int count=arr.getcount(); shapes ptr; for(i=1;i<=count;i++) { ptr=(shapes)arr.getobj(i); ptr->save(ft); } ft.close(); flag=0; } break; case 3: m.getmousepos(button,x,y); if(((button &1)==0)&&(flag==1)) { setcolor(clmum); moveto(sx,sy); lineto(ex,ey); myline l=new myline(sx,sy,ex,ey,clmum); if(l==NULL) exit(1); arr.add(l); flag=0; } break; case 4: m.getmousepos(button,x,y); if(((button &1)==0)&&(flag==1)) { setcolor(clmum); rectangle(sx,sy,ex,ey); myrectangle r=new myrectangle(sx,sy,ex,ey,clmum); if(r==NULL) exit(1); arr.add(r); flag=0; } break; case 5: m.getmousepos(button,x,y); if(((button &1)==0)&&(flag==1)) { setcolor(clmum); circle(sx,sy,r); mycircle *c=new mycircle(sx,sy,r,clmum); if(r==NULL) exit(1); arr.add(c); flag=0; } break; } if(index==6) break; } Welcome(); closegraph(); restorecrtmode(); }

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