topic Re: CAcUiLineWeightComboBox Owner Draw Problem in ObjectARX Forum

CAcUiLineWeightComboBox Owner Draw Problem

Kyudos — Tue, 02 Aug 2016 22:17:50 GMT

I'm using a combo derived from CAcUiLineWeightComboBox on my MFC dialogs, but it seems to have problems re-drawing when the control doesn't have focus (it is generally blank until selected). I have the control set to "Owner Draw Fixed", "Has Strings" is true and I'm using the "Drop List" style. The lines and text draw correctly in the drop down, but the combo itself only draw intermittently.

If I turn off the owner draw or switch to "Dropdown" style the combo redraws correctly, but displays only the text. I need the drop-list style to 'enforce' a selection (and it would be nice to graphically display the weight).

Is this a known issue?

Re: CAcUiLineWeightComboBox Owner Draw Problem

Kyudos — Tue, 02 Aug 2016 23:22:28 GMT

This similar issue suggests the class is not processing WM_PAINT messages properly:

http://stackoverflow.com/questions/1658620/why-is-my-owner-drawn-combobox-shown-empty

Re: CAcUiLineWeightComboBox Owner Draw Problem

Virupaksha_aithal — Fri, 19 Aug 2016 10:35:49 GMT

Hi,

can you please test the attached sample?

Re: CAcUiLineWeightComboBox Owner Draw Problem

Kyudos — Mon, 22 Aug 2016 03:02:56 GMT

Hi Viru,

Thanks...yes that works. It seems using a derived combo was the problem - see attached project.

I may just have neglected to override something necessary, but in the mean time I can switch to using "pure" CAcUiLineWeightComboBox members.