RvFontCombobox behavior with multiple fonts

tomr · Post by **tomr** » Fri Mar 20, 2026 11:09 am

Hello RichView Support,
I have a question regarding the behavior of the RVFontComboBox.

In Microsoft Word, when selecting text that contains two or more different fonts, the font combo box appears empty, indicating mixed formatting.

: Verhalten in Word.png (8.85 KiB) Viewed 329 times

In RichView, however, when I replicate this scenario, one of the fonts is always displayed instead. The selected font depends on the direction of the selection:

When selecting from top to bottom, the last font is shown.

: Top to Bottom.png (24.01 KiB) Viewed 329 times

When selecting from bottom to top, the first font is shown.

: Bottom To Top.png (22.3 KiB) Viewed 329 times

Is there a way to replicate the behavior of Microsoft Word, so that the combo box indicates mixed fonts instead of displaying a single one?

Kind regards,
Tom

standay · Post by **standay** » Fri Mar 20, 2026 1:33 pm

I used this code to do something like that:

Code: Select all

var
  fi, fi2: TFontInfo;
  i, FStart, FSOff, FEnd, FEoff: integer;
  rv: TCustomRichViewEdit;
 ...
 
  rv.GetSelectionBounds(FStart, FSOff, FEnd, FEoff, true);
  fi := rv.Style.TextStyles[rv.GetItemStyle(FStart)];
  
  for i := FStart to FEnd do
    begin
      fi2 := rv.Style.TextStyles[rv.GetItemStyle(i)];
      if fi.FontName <> fi2.FontName then
      begin
        cmbFontName.Text := '[Multiple]'; //or you could set to nothing
        break;
      end;
    end;

As far as I know, there's no other way other than to spin through your selection (you might have a different font in the middle of the selection, not just at the start or end). Keep in mind if you have a huge file and select it all, this can be slow. I stopped using it as I decided I didn't need it.

Stan (not with richview, just a user)

Post by **Sergey Tkachenko** » Sun Mar 22, 2026 6:13 pm

These combo-boxes display the font of the current text style.
Yes, it was done for performance reasons.

tomr · Post by **tomr** » Mon Mar 23, 2026 8:20 am

Hi,
Thank you both for your responses.
I will keep it that way then.

tomr · Post by **tomr** » Tue Mar 24, 2026 3:50 pm

Sergey Tkachenko wrote: Sun Mar 22, 2026 6:13 pm These combo-boxes display the font of the current text style.
Yes, it was done for performance reasons.

Hi Sergey,
As you mentioned the current text style, I'm reporting a bug that can be reproduced in the demo.
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