[RJ]

When i update to V16:00 the comboboxes will not show a dropdown list.
I tried to made a demo project for you for this but in the demo the dropdownlist is working but when selecting a item in the list an error is accuring.

Regards
Robert

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[Support]

Thank you for the message, this error will be fixed at the nearest days.

[RJ]

In 16.01 the problem is not solved complety. The dropdownlist is not visible or in the background as in the picture in the attachment. When i made a new demo it works but not in my programm.

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[Support]

It look’s like popup window is covered by panel placed on the form.
I’m right?

[RJ]

yep

[Support]

This panel or form has some specific options used?
WS_EX_TOPMOST window style maybe?

[RJ]

The form has fsStayOnTop activated. With the Version 15.xx everything is working perfect.

[RJ]

In V16.02 it is still not working.

[Support]

Sorry, problem is that I can’t repeat the issue.
Can you help to repeat it somehow?

[Lasse]

I had exactly same issue and fixed it like this in acPopupController.pas:

procedure TsPopupController.AnimShowPopup(AForm: TForm; wTime: word = 0; BlendValue: byte = MaxByte);
…
h := HWND_TOPMOST; //TopWndAfter; Lasse

[Support]

Thank you for the information. “TopWndAfter” used only with debugger for prevent of covering of debugger by “TopMost” popup forms.
Robert, can you confirm that issue exists under debugger only?

[RJ]

Yes i found out that the problem only is there when i compile and run the program. Wenn i run the .exe the combobox is working ok. The only problem what is happening on both situations is that after the oncreate event from the main form a onChange event is triggered from a combobox who is on an other form.this is very strange.

Hope this info helps

[Support]

RJ wrote:

The only problem what is happening on both situations is that after the oncreate event from the main form a onChange event is triggered from a combobox who is on an other form.

Can you help me to repeat this situation? What should be done for that?

[RJ]

I found the reason why the onChange event is triggered. The problem is in the procedure sComboBox2.Clear.
Two things are wrong in this procedure. 1) after clear the onChange event is triggered. 2) the Items ale not cleared, only the .text is cleared. The standard combobox works ok.

The dropdownlist is not visible or in the background wenn i run the programm in delphi enviroment.

[RJ]

sorry i forgot the demo programm

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[Lasse]

ComboBox.Clear and ComboBox.Items.Clear are two different things.

[Support]

Thank you, the issue will be solved in the nearest release.

[Author]

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