Differences in displaying the tab character

[Jacek Laskowski 57]

I have TMemo and TVirtualTreeView on my form. Both controls set the same font, Ubuntu Mono.
The text in both controls is the same, contains one tab (#9, marked in memo).
Why does TMemo display it differently (wide) and VTV differently (narrow)?

 

[Lars Fosdal 1724]

TMemo wraps a native windows control. TVirtualTreeView, all custom.
Not sure if you can adujst tab rendering in TVTV, but you can set tab stops in TMemo
http://delphitipsandtricks2.blogspot.com/2012/03/set-tab-stops-for-tmemo.html

 

[Jacek Laskowski 57]

Thanks, but this solution not working with VTV. Possibly VTV not support change this parameter.

[Attila Kovacs 617]

you have to edit VTV sources and before every DrawText(W) do a

DrawFormat := DrawFormat or DT_EXPANDTABS or DT_TABSTOPS;

DrawFormat := DrawFormat or (FTabwidth shl 8);

and you can create a property of FTabwidth, (plus one for Expandtabs yes/no).

 

Edited May 20, 2020 by Attila Kovacs

[Jacek Laskowski 57]

On 5/20/2020 at 9:19 PM, Attila Kovacs said:

you have to edit VTV sources and before every DrawText(W) do a

DrawFormat := DrawFormat or DT_EXPANDTABS or DT_TABSTOPS;

DrawFormat := DrawFormat or (FTabwidth shl 8);

and you can create a property of FTabwidth, (plus one for Expandtabs yes/no).

 

Thanks, this works!