A TComboBox alternative not based on WinAPI

[Yaron 60]

The standard Delphi TComboBox is based on WinAPI. Every item you add to the list triggers a WinAPI "SendMessage" call, which takes much (x100) longer than adding an item to a TStringList.

 

To overcome this delay, with the help of AI, I designed a slimmed down replica of TComboBox based on TStringList:

https://github.com/bLightZP/ZPComboBox

 

If you have a form with lots of TComboBox drop down list components and it's not opening fast enough for you, try this.

Limitations

• The only event supported is OnChange.
• The only style supported is csDropDownList.
• The pop-up listbox is shown in a pop-up window, so the underlying window's title bar changes color when losing focus.
• The styling is close to TComboBox, but not identical.

[ThomasRiedelDk 0]

Sounds good!
Can you even make a version where you can locate an Item by typing, like csDropDown, but it must be an item from the list?

[limelect 51]

@ThomasRiedelDk It has

BetterComboBox.Text:='abc'; this is a find in the list

As for that, I made an issue on GitHub