change a single ListItem height

or use a different component like
TMSGrid or DevExpress grid

Yeah report style. I'd rather not use other components if it's not possible (added complications.. I do a lot of custom subitem drawing)

You should change the listbox style property to lbOwnerDrawVariable and write the code below to its MeasureItem event:

procedure TForm1.ListBox1MeasureItem(Control: TWinControl; Index: Integer;
  var Height: Integer);
begin
  if Index = 0 then
    Height := 30;
end;

I want to change the height in a ListView, not a ListBox.

Oh, sorry, I didn't pay attention in the title.

Personally, I'd use a grid, because it is the control that you really *should* be using for this functionality.
You can continue to do your "subitem" drawing, it will just be in columns .vs subitems.

imho, not possible

and for custom drawing ... mostly requires a lot of time and fine tuning
imho, this is time better spent learning on a advanced component
(it does take time to learn how to work with other components)
and the bonusses you get with the extra component far outweigh the extra's you get with custom drawing

there is off course allways the issue for @home or @work
@home ... free components usually get the upperhand
(difficult to explain to the wife why you want the new grid component)
@work ... just put the features and the time needed for both in a excel, with the hourly rate
(custom drawing will allways be more expensive ...)
and your manager should be easily convinced.

devexpress has all you need for this
with 1 event : OnGetCellHeight (for certains views, each cell can be individually set)
probably TMSGrid too (don't have that)

maybe some other free grids have this too.
like rowgrid in here : http://www.torry.net/pages.php?id=115

I've been testing with the grid components, but don't really like them at all. Guess I'll let it go. Was checking VirtualTreeView also but it's too much work to reproduce what I'm doing with ListView

If you just need help in making a grid control *look* like a TListview, that's definitely doable.

This is my current listview

http://i31.tinypic.com/28iz4oy.jpg

takes about 1-3 days to set that up with devexpress
(depending on the knowledge and experience and number of listviews)

i modified an app from 80 listviews to all devexpress grids in 20 days
i still sweat just thinking about that

but the extra's you get are well worth time/money spent

some of them found the filtering and totalisation options
nothing i programmed in, just added a cxpopupmenu to the active grid
they were overjoyed with this, and starting using it extensively
then they wanted those grids in all the apps (200+),  that gave us a headache  ...

i believe tms has the same features

i'm not trying to advertise, just saying you may get more than you thought if you do it.

i still think what you are trying with listview is impossible  :<

Thing is.. it's a freeware application, not work related, so I don't wish to spend on components. What about virtualtreeview? I checked it briefly but seemed to complex/big to learn how to do everything with it.

The idea of wanting items with a different height is to "embed" a panel on top of what would be a blank area in the item, with some other controls; it would re-locate there upon selecting an item and scrolling.

it is indeed very complex to start with
you really need to dig in this component to get to know it

I stepped back from it 2 years back when they bought devex quantumtree here

looks like you can do it with downloading the VirtualTreeView and
the extra EditLink components:
http://www.soft-gems.net/supplement/download.php?ID=48

There is a lot more documentation now on the site

The key part is understand the way it loads to paint.
It is very fast in drawing as it only gets the data it needs to show on screen.
and off course understanding the record per node structure
i used 1 variable in the record as a object
later on changing the object type is all you need to do add more data to the treeview

hmmm
one idea would be to have an info area below/above your treeview with extra info for the selected record

if no info then set the panel visibility to false

we did this before we changed
now we use banded tables with a preview area per record

i meant listview instead of treeview

below/above your *listview* with extra info for the selected record

I'm alredy doing that, but would rather the controls to be embedded in the list.

This could be done with a TStringList very easily. Can you post some of your data in CSV format?

I meant TStringGrid, not TStringList.

Can you also explain the "progress bars" and the different colors in them?

I'd have to explain in detail how the app works, there's no need. I just change the row or item color on the ondraw events and draw directly to the LV canvas to draw the bars.

Thinking of adding/removing a few blank rows at run-time when I select an item, just after the one selected and scroll up enough to place the panel with controls there, but it's a kinda dirty solution.

i don't understand why you delete this Q

in your remark as to why to delete,
you state it can't be accomplished what you want

i posted just that in my first remark:
http://#25097357

according to ee rules you should accept that comment

also stated in http://25100667

so should accept both those comments instead of deleting

When you say, 'opted for another way', please explain the other way? How do we know you didn't use one of our suggestions?

Hi, changing the font of the item I want bigger doesn't give me what I want (larger height of an item without changing the appearance, with the rest of the item below the text in blank).

http://i28.tinypic.com/hs6rg3.jpg

I opted to continue using a panel outside the listview like I was using before, as commented in 25168762

Well, we are at a loss to why you didn't modify your application to use a grid as we suggested, I began working on it using a plain stringgrid but you wouldn't give me enough information so I actually blame you for not being able to come up with a workable solution. It is NOT as difficult as you think to do this using a grid.

When you post questions here, you expect to get a solution but that also means that *we* expect you to provide us with info on what it is you really want and to also provide us with data, if required and to answer other questions.

While Geert_Gruwez has objected to your asking that the question be deleted, I won't. I just hope you have learned a lesson in using E-E because if you ask another question, expect the same from us. And if you don't provide us with what we ask, you, again, won't get a solution.

Remember, we do this for free, if you want it all coded for you, contact a contract programmer via rent-a-coder or elance.

Hi, I'm ok with accepting your contributions as answer (is multiple accept gone?, can only see "Accept as solution" atm), although my intent is still the same, do what I asked with a ListView, I don't wanna use a grid as stated before for various reasons. I considered further discussing pointless if, from the comments, it really is not possible to do with the ListView, and since there was no code or any major contribution I considered it was acceptable to delete the question given the current outcome. If you consider it wrong, I am sorry, I will still accept and award the points normally as I said. I have been in E-E for 10 years, I'm not new here.

i objected to the question because it actually shows that it can't be done.
When other people ask the same question they may stumble upon this question
or this question can be used as a reference to shortcut a lengthy discussion

This question is just some proof that the way of achieving what you want can't be done.

I understand why you want it with a Listview.
You must have tons of experience with this (MSWindows) component.
And it would indeed be wrong to just drop all that experience and
do this with some other component.
Some components have limits, you ran into a limit of the listview
Maybe MS will alter it's component to allow this in the future.

As EddieShipman suggests it is easier to achieve with a grid component.
And it may be the only way of accomplishing your goal.