[Bug 58914] New: Basic Windows pull-down lists are randomly missing entries

[WineHQ Bugzilla]

http://bugs.winehq.org/show_bug.cgi?id=58914

Bug ID: 58914
           Summary: Basic Windows pull-down lists are randomly missing
                    entries
           Product: Wine
           Version: unspecified
          Hardware: x86-64
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: -unknown
          Assignee: [e-mail]
          Reporter: [e-mail]
      Distribution: ---

Created attachment 79596
  --> http://bugs.winehq.org/attachment.cgi?id=79596
A simple pull-down list in Windows10

I am the developer of the SARTrack free sofware for Search and Rescue.
In development for 19 years.
For a long time I get complaints from customers that under WINE the basic
Windows pull-down boxes have randomly missing entries.
There seems to be no logic behind it as of the content of the entry.

... Sems I can only add a single attachment at the time. Will send a second
post with the second screenshot.

[Bug 58914] Basic Windows pull-down lists are randomly missing entries

[WineHQ Bugzilla]

http://bugs.winehq.org/show_bug.cgi?id=58914

Bart Kindt  changed:

What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |[e-mail]

--- Comment #1 from Bart Kindt  ---
Created attachment 79597
  --> http://bugs.winehq.org/attachment.cgi?id=79597
Simple pull-down list in WINE. Is missing entries for no reason.

My software is written in Delphi Pascal 12.3, uses plain Windows, does NOT use
any Themes.  It is a basic 'XP compatible' program, that is, it does not use
any extra features added from Vista onwards.

Bart
Developer
https://sartrack.nz

[Bug 58914] Basic Windows pull-down lists are randomly missing entries

[WineHQ Bugzilla]

http://bugs.winehq.org/show_bug.cgi?id=58914

--- Comment #2 from Bart Kindt  ---
I appologize. I got the two screenshots mixed up. 
The one with the missing "EOC" is the WINE version.

[Bug 58914] Basic Windows pull-down lists are randomly missing entries

[WineHQ Bugzilla]

http://bugs.winehq.org/show_bug.cgi?id=58914

Austin English  changed:

What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|                            |download
                URL|                            |https://sartrack.nz/

[Bug 58914] Basic Windows Combobox are randomly missing entries

[WineHQ Bugzilla]

http://bugs.winehq.org/show_bug.cgi?id=58914

Bart Kindt  changed:

What    |Removed                     |Added
----------------------------------------------------------------------------
          Component|-unknown                    |user32
            Summary|Basic Windows pull-down     |Basic Windows Combobox are
                   |lists are randomly missing  |randomly missing entries
                   |entries                     |

--- Comment #3 from Bart Kindt  ---
I am talking about the basic Combobox located in User32.dll or Comctl32.dll,
probably the first one.

[Bug 58914] Basic Windows Combobox are randomly missing entries

[WineHQ Bugzilla]

http://bugs.winehq.org/show_bug.cgi?id=58914

--- Comment #4 from Rafał Mużyło  ---
A semi-random stab in the dark, but you might check bug 58932 - description
seems unrelated, but perhaps it's a hit anyway, given that it can't be a
missing font problem (after all, *you* would know if that was the case).

But if this is an even older problem, you might wanna define 'for a long time'
a bit better, as in 'did it ever worked properly in wine ?'.

Still 'string not fitting allocated space, therefore getting rejected, instead
of cropped' seems most promising research route.

As a side note: why does this program effectively hardcode its installation
path not only in its installer, but also in the program itself ?

[Bug 58914] Basic Windows Combobox are randomly missing entries

[WineHQ Bugzilla]

http://bugs.winehq.org/show_bug.cgi?id=58914

--- Comment #5 from Bart Kindt  ---
Right.
I found a Linux laptop back to test with. The previous data came from a user.
Running Ubuntu 22.04, and the latest Wine from your website.
Installed SARTrack.
And I see exactly the same issues here.

Wrote a small test program, copied the relevant code over from the main
program.
Checked the Font and other settings, all the same.
Guess what: Of course it works fine in the test program.

So I played with the SARTrack source code: In the entries 'Add "IMT" then Add
"EOC" the "EOC" is missing. So I duplicated these two entries. And the second
time both showed normally (under the missing first "EOC").

So I wanted to see what actually ended up in the Combobox by reading it back by
Index:
Index := RefTypeCombobox.Items.Add(rtrIMT);
    Log('RefTypeCombobox Index: '+Index.ToString+' =
'+RefTypeCombobox.Items[Index]);
    Index := RefTypeCombobox.Items.Add(rtrEOC);
    Log('RefTypeCombobox Index: '+Index.ToString+' =
'+RefTypeCombobox.Items[Index]);

And now it works. The Log entry inserted between the 'Combobox.Items.Add'
caused the problem to go away. 
So I thought it is a timing issue.
- I then replaced the Log entry with a 'Sleep(100)'. But this did NOT work.
- I then added a 'application.processmessages' in between. But this also did
not work.

The only way I can make it work, is to have a Log entry in between. 
This Log entry just processes the string, writes it into a TMemo or a
TRichEdit, depending on a setting.
Now the interesting bit:  When the Log entry is saved to the (Windows DLL)
TRichEdit, it works. 
If the Log entry is saved into a TMemo, it does NOT work.

So the call to RichEdit is causing the Combobox to work correctly.

Any ideas?

PS: The installation directory was selected 19 years ago, because it would not
install on New Zealand Police laptops.
It has stayed like that ever since:
C:\users(username)\AppData\Roaming\SARTrack\ 
Everything is there, except the Debug lots etc. in Documents/SARTrack.
The Registery is not used.

[Bug 58914] Basic Windows Combobox are randomly missing entries

[WineHQ Bugzilla]

http://bugs.winehq.org/show_bug.cgi?id=58914

--- Comment #6 from Bart Kindt  ---
Update:
If I afterwards walk through the Items in the Combobox, it has indeed entered
an _empty_ entry at the index where the value "EOC" should be.

It is not a display issue. It has entered an empty field/string at that index.

Note that I use this window as the working example.
This issues is all over the program in many places.
And always at the same index in these Comboboxes.