Solved

how to count the order of a image list?

Posted on 2013-11-25
4
362 Views
Last Modified: 2013-11-26
Hello guys

I have a panel with 7 images, with this panel I can exchange the images among them, but I need that all those images be in the order by picture.

For each image I gave a number in its tag from 1 to 7

How can I count all images that is in my panel and knows if they are in correct order from 1 to 7 and not different of these?

I attached an example with a panel with images.

This is a part of this thread


Thread with card and drag and drop


thanks
Alexandre
OrderCount.zip
0
Comment
Question by:hidrau
  • 3
4 Comments
 
LVL 26

Accepted Solution

by:
Sinisa Vuk earned 500 total points
ID: 39676865
I use simple sorting of image position (X) and after that check is order of index (Tag) is ok.

function TForm1.IsCorrectOrder(pnl: TPanel): Boolean;
var
  i, j: Integer;
  ar: array of TPoint;
  pt: TPoint;
begin
  //default - if found incorrect one then flag will be set to False
  Result := True;
  SetLength(ar, pnl.ControlCount);

  for i := 0 to pnl.ControlCount-1 do
  begin
    ar[i].X := pnl.Controls[i].Left; //keep x pos
    ar[i].Y := pnl.Controls[i].Tag;  //keep assoc. tag
  end;

  //try to sort array
  for i := High(ar) downto Low(ar) do
  begin
    for j := Low(ar) to High(ar) - 1 do
    begin
      if ar[j].X > ar[j + 1].X then
      begin
        pt := ar[j];
        ar[j] := ar[j + 1];
        ar[j + 1] := pt;
      end;
    end;
  end;

  //check order - compare if first is lower than next
  j := 0;
  for i := Low(ar) to High(ar) do
  begin
    if (ar[i].Y < j) then
    begin
      Result := False;
      Break;
    end;
    j := ar[i].Y; //keep this
  end;
end;

procedure TForm1.Button1Click(Sender: TObject);
begin
  if IsCorrectOrder(Panel3) then
    ShowMessage('ok')
  else
    ShowMessage('not ok');
end;

Open in new window

0
 
LVL 1

Author Comment

by:hidrau
ID: 39677208
Very interesting, I am gonna check that.

Once again, Thanks Sinisav for your help. Yesterday I was thinking about that and I didn't get any solution. What you told me, open my mind about. :)
0
 
LVL 1

Author Comment

by:hidrau
ID: 39679338
Your code is ok.
0
 
LVL 1

Author Closing Comment

by:hidrau
ID: 39679438
Thanks very much Sinisav.

God always bless you :)
0

Featured Post

Free Tool: Port Scanner

Check which ports are open to the outside world. Helps make sure that your firewall rules are working as intended.

One of a set of tools we are providing to everyone as a way of saying thank you for being a part of the community.

Question has a verified solution.

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

Suggested Solutions

In this tutorial I will show you how to use the Windows Speech API in Delphi. I will only cover basic functions such as text to speech and controlling the speed of the speech. SAPI Installation First you need to install the SAPI type library, th…
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…
Established in 1997, Technology Architects has become one of the most reputable technology solutions companies in the country. TA have been providing businesses with cost effective state-of-the-art solutions and unparalleled service that is designed…
Finds all prime numbers in a range requested and places them in a public primes() array. I've demostrated a template size of 30 (2 * 3 * 5) but larger templates can be built such 210  (2 * 3 * 5 * 7) or 2310  (2 * 3 * 5 * 7 * 11). The larger templa…

860 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