Solved

qow 12: how to draw an egg on a canvas?

Posted on 2002-04-01
11
863 Views
Last Modified: 2010-05-18
hi experts,

i am starting a new quest: qow = question of the week :-)
each week i will introduce a new simple? question.

now qow 12
(one week later, i was absend)

the first working solution will get the points (a graded).

sorry, top 15 experts, you are not allowed to solve this
q, only other can solve this question :-(

well the question is:
how to draw an egg on a canvas??

a little sample is needed

let see

meikl ;-)
0
Comment
Question by:kretzschmar
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 3
  • 2
  • 2
  • +4
11 Comments
 
LVL 17

Expert Comment

by:inthe
ID: 6909982
hehe very seasonal meikl :)
 
er poached egg on toast :

var
r : trect;
begin
r.Left := 5;
r.top := 5;
r.Right := 110;
r.Bottom := 105;
form1.canvas.FrameRect(r);
form1.canvas.Ellipse(10,10,100,100);
form1.Canvas.Brush.Color := clYellow;
form1.canvas.Ellipse(30,30,80,80);
end;
0
 
LVL 9

Expert Comment

by:ginsonic
ID: 6910240
Whay not red ? :o)
0
 
LVL 17

Expert Comment

by:inthe
ID: 6910350
er what do you feed your chickens? <G>
0
What does it mean to be "Always On"?

Is your cloud always on? With an Always On cloud you won't have to worry about downtime for maintenance or software application code updates, ensuring that your bottom line isn't affected.

 
LVL 6

Expert Comment

by:DrDelphi
ID: 6910353
with form1.canvas do
 begin
  Brush.Color := clYellow;
  Brush.Style := bsDiagCross;
  Ellipse(0,0,210,350);
  MoveTo(13,90);
  Lineto(210,210);
  MoveTo(6,120);
  Lineto(206,240);
  Brush.Color := clBlue;
  Brush.Style := bsSolid;
  FloodFill(14,94,ClBlack,fsBorder);
  Brush.Style := bsClear;
  Font.Size:=12;
  TextOut(220,0,'HAPPY EASTER!!');
 end;


Good luck!!
0
 
LVL 3

Expert Comment

by:tongalite
ID: 6910823
Hi,

he he he.... this is as simple as it gets

it's fun!
t.
procedure TForm1.EggButtonClick(Sender: TObject);

var
   x,y:integer;

begin
     x:=10; //Pos
     y:=10; //Pos
     image1. canvas.brush.color:=random(256*256*256);//color random
     image1.canvas.ellipse(x,y,x+(200), y+(120)); //ellipse size
      //Image1 = Transparent:=False
    end;
end.
0
 
LVL 6

Expert Comment

by:zebada
ID: 6911897
// _________________________________________________________________________
procedure TForm1.eggTop(l,t,r,b: integer);
var
  half: integer;
begin
  half := t+(b-t) div 2;
  form1.Canvas.Arc(l,t,r,b,l,half,r,half);
end;

// _________________________________________________________________________
procedure TForm1.eggBottom(l,t,r,b: integer);
var
  half: integer;
begin
  half := t+(b-t) div 2;
  form1.Canvas.Arc(l,t,r,b,r,half,l,half);
end;

// _________________________________________________________________________
procedure TForm1.egg(l,t,r,b: integer; egginess: integer);
var
  stretch: integer;
begin
  stretch := (egginess*(b-t)) div 100;
  EggTop(l,t+stretch,r,b);
  EggBottom(l,t,r,b+stretch);
  form1.Canvas.Brush.Color := clBlue;
  form1.Canvas.FloodFill((r-l) div 2,(b-t) div 2,form1.Canvas.Pen.Color,fsBorder);
end;

// _________________________________________________________________________
procedure TForm1.Button1Click(Sender: TObject);
begin
  // Left, top, width, height, egginess
  egg(50,50,300,400,20);
end;

0
 
LVL 9

Expert Comment

by:ginsonic
ID: 6911992
//hehe very seasonal meikl :)

inthe, how I know the traditional Eastern Egg is red :P
0
 
LVL 1

Accepted Solution

by:
MBo earned 25 total points
ID: 6912213
procedure TForm1.Button2Click(Sender: TObject);
var
rgn:hRgn;
pts:array[0..6] of TPoint;
x1,y,x2,deltax,deltay:integer;
begin
x1:=100; x2:=400; y:=200; deltax:=5; deltay:=100;
Canvas.brush.Color:=clRed;
//Canvas.Pen.Color:=clRed; //for canvas.floodfill
pts[0].x:=x1;            pts[0].y:=y;
pts[1].x:=x1+deltax;     pts[1].y:=y-deltay;
pts[2].x:=x2-deltax;     pts[2].y:=y-2*deltay;
pts[3].x:=x2;            pts[3].y:=y;
pts[4].x:=x2-deltax;     pts[4].y:=y+2*deltay;
pts[5].x:=x1+deltax;     pts[5].y:=y+deltay;
pts[6].x:=x1;            pts[6].y:=y;

//simple and slow
//Canvas.PolyBezier(pts);
//Canvas.FloodFill(x1+100,y,clRed,fsBorder);

//faster
BeginPath(canvas.Handle);
PolyBezier(canvas.Handle,pts,7);
EndPath(canvas.Handle);
rgn:=PathToRegion(Canvas.Handle);
FillRgn(Canvas.handle,Rgn,Canvas.Brush.Handle);
DeleteObject(rgn);

end;
0
 
LVL 27

Author Comment

by:kretzschmar
ID: 6912425
perfect :-))

as all know an egg isn't a ellipse or an egg on toast,
even there are some happy pictures, spcially from drdelphi :-))

well next week a new ?simple q?

thanks to all for participating on this quest

meikl ;-)
0
 
LVL 27

Author Comment

by:kretzschmar
ID: 6912432
for zabada,

i post an additional q for you,
for your also correct egg

meikl ;-)
0
 
LVL 27

Author Comment

by:kretzschmar
ID: 6915263
0

Featured Post

What does it mean to be "Always On"?

Is your cloud always on? With an Always On cloud you won't have to worry about downtime for maintenance or software application code updates, ensuring that your bottom line isn't affected.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Creating an auto free TStringList The TStringList is a basic and frequently used object in Delphi. On many occasions, you may want to create a temporary list, process some items in the list and be done with the list. In such cases, you have to…
Have you ever had your Delphi form/application just hanging while waiting for data to load? This is the article to read if you want to learn some things about adding threads for data loading in the background. First, I'll setup a general applica…
NetCrunch network monitor is a highly extensive platform for network monitoring and alert generation. In this video you'll see a live demo of NetCrunch with most notable features explained in a walk-through manner. You'll also get to know the philos…
Michael from AdRem Software explains how to view the most utilized and worst performing nodes in your network, by accessing the Top Charts view in NetCrunch network monitor (https://www.adremsoft.com/). Top Charts is a view in which you can set seve…
Suggested Courses
Course of the Month5 days, 21 hours left to enroll

626 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question