Solved

Coloured rows in check list box

Posted on 2000-03-28
4
209 Views
Last Modified: 2010-08-05
I have a check list box component that displays a list of tasks to be completed.

I would like to be able to change the colour of a line if it has been active for more than 4 hours, but can't find a way to change 1 row's font attributes without changing every row.

Any ideas?
0
Comment
Question by:johnstoned
  • 2
  • 2
4 Comments
 
LVL 2

Expert Comment

by:aubs
ID: 2663464
Use the ondrawitem event to change the font color for a particular line
0
 
LVL 2

Accepted Solution

by:
aubs earned 100 total points
ID: 2663502
Set the CheckListBox Style property to lbOwnerDrawFixed.


Then put this in the OnDrawItem Event. It should show you how you can change the font color.

procedure TMainForm.CheckListBox1DrawItem(Control: TWinControl;
  Index: Integer; Rect: TRect; State: TOwnerDrawState);
var
  Offset: integer;
begin
      with (Control as TCheckListBox).Canvas do
      begin
        Offset:= 6; //maynot be needed
            FillRect(Rect);
        if (Control as TCheckListBox).Checked[Index] then
              (Control as TCheckListBox).font.Color:= clRed
        else
          (Control as TCheckListBox).font.Color:= clBlack;
            TextOut(Rect.Left + Offset, Rect.Top, (Control as TCheckListBox).Items[Index]) ;
      end;

end;
0
 

Author Comment

by:johnstoned
ID: 2664425
This bit of code seemed to have a bug.  It keeps flashing the items up in the screen then redrawing them again.

if (Control as TCheckListBox).Checked[Index] then
   (Control as TCheckListBox).font.Color:= clRed
   else
     (Control as TCheckListBox).font.Color:= clBlack;


After a little experimentation, I changed

Control as TCheckListBox).font.Color:= clRed
to
font.Color:= clRed
and that seemed to cure it.

Thanks for the help.
0
 

Author Comment

by:johnstoned
ID: 2664426
This bit of code seemed to have a bug.  It keeps flashing the items up in the screen then redrawing them again.

if (Control as TCheckListBox).Checked[Index] then
   (Control as TCheckListBox).font.Color:= clRed
   else
     (Control as TCheckListBox).font.Color:= clBlack;


After a little experimentation, I changed

Control as TCheckListBox).font.Color:= clRed
to
font.Color:= clRed
and that seemed to cure it.

Thanks for the help.
0

Featured Post

Is Your Active Directory as Secure as You Think?

More than 75% of all records are compromised because of the loss or theft of a privileged credential. Experts have been exploring Active Directory infrastructure to identify key threats and establish best practices for keeping data safe. Attend this month’s webinar to learn more.

Question has a verified solution.

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

Suggested Solutions

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…
In my programming career I have only very rarely run into situations where operator overloading would be of any use in my work.  Normally those situations involved math with either overly large numbers (hundreds of thousands of digits or accuracy re…
Along with being a a promotional video for my three-day Annielytics Dashboard Seminor, this Micro Tutorial is an intro to Google Analytics API data.
In this video I am going to show you how to back up and restore Office 365 mailboxes using CodeTwo Backup for Office 365. Learn more about the tool used in this video here: http://www.codetwo.com/backup-for-office-365/ (http://www.codetwo.com/ba…

895 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

Need Help in Real-Time?

Connect with top rated Experts

17 Experts available now in Live!

Get 1:1 Help Now