Solved

Sorting listview tasks based on priority

Posted on 2001-08-14
3
259 Views
Last Modified: 2010-04-06
Hello there

Ive got a listview which has a column marked 'priority'.
Listview.items. doesnt have a sort item provided
so I can sort tasks based on say column 3 which is marked 'priority'

I want to sort my tasks in the listview based on the priority in column 3.

Anyone knows hows its done?

Ben Iti
0
Comment
Question by:Ben_iti
3 Comments
 
LVL 4

Expert Comment

by:fva
ID: 6383646
You will have to go for custom sorting.
Basically you define a callback compare function that will compare two items on their third subitem and configure the TListView to use that.
Take a look at CustomSort method of the TListView and at the OnCompare event of TListView

If you need more details, please say.

F.
0
 
LVL 21

Accepted Solution

by:
gemarti earned 24 total points
ID: 6385247
From help:

procedure TForm1.ListView1ColumnClick(Sender: TObject; Column: TListColumn);

begin
  ColumnToSort := Column.Index;
  (Sender as TCustomListView).AlphaSort;
end;


The OnCompare event handler causes the list view to sort on the selected column:

procedure TForm1.ListView1Compare(Sender: TObject; Item1, Item2: TListItem; Data: Integer; var Compare: Integer);
var
  ix: Integer;
begin
  if ColumnToSort = 0 then
    Compare := CompareText(Item1.Caption,Item2.Caption)
  else begin
   ix := ColumnToSort - 1;
   Compare := CompareText(Item1.SubItems[ix],Item2.SubItems[ix]);
  end;

end;
0
 

Author Comment

by:Ben_iti
ID: 6403174
Wow, you's a clever programmers, Why cant I be like you's?
What am I missing that you's have?

How did you get this knowledge?

I always have to ask questions.

I havent tried it yet but I will soon
Thanks

Ben
0

Featured Post

Announcing the Most Valuable Experts of 2016

MVEs are more concerned with the satisfaction of those they help than with the considerable points they can earn. They are the types of people you feel privileged to call colleagues. Join us in honoring this amazing group of Experts.

Question has a verified solution.

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

Suggested Solutions

Introduction I have seen many questions in this Delphi topic area where queries in threads are needed or suggested. I know bumped into a similar need. This article will address some of the concepts when dealing with a multithreaded delphi database…
Introduction Raise your hands if you were as upset with FireMonkey as I was when I discovered that there was no TListview.  I use TListView in almost all of my applications I've written, and I was not going to compromise by resorting to TStringGrid…

821 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