[Lazarus] TComboBox.ReadOnly

[Werner Pamler]

Am 02.05.2020 um 16:15 schrieb Juha Manninen via lazarus:
> Ok, I removed it in r63112.

Something must be screwed up in TComboboxEx. Don't worry, not by the 
removal of the ReadOnly property, but it must have been around for a 
long time since the beginning: This component introduces a new Style 
type: TComboboxExStyle = (csExDropDown, csExSimple, csExDropDownList). 
In Delphi it is possible to type text into the control when the Style is 
csExDropDown or csExSimple, but in Lazarus this is not possible, the 
control behaves like csExDropDownList in all cases (except for the 
grayed appearance, in Windows). And in Delphi the Style with csExSimple 
looks like a simple TEdit, while in Lazarus it has the dropdown arrow, 
like the csExDropdown(List) Style.

I tested this on Windows, and Linux gtk2 and qt5.

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