Question about RotateLabel

[johnnix]

Hello,

I am using TChart 2015.15.150420 32 bit and I am using Canvas3D.RotateLabel to draw a rotated text. The last parameter of the RotateLabel procedure is AllowHTML which I set to true. What HTML should I use to present a subscript character?

Regards

[Yeray]

Code: Select all

<SUB>SubScript Text Here</SUB>

[johnnix]

Hello Yeray,

I tried that but unfortunately it does not work, my actual code is:

Code: Select all

procedure TMainForm.Chart11AfterDraw(Sender: TObject);
begin
  ...
  TChart(Sender).Canvas.RotateLabel(X, Y, '<SUB>SubScript Text Here</SUB>', 45 , true);
end;

Am I missing something?

[Narcís]

Hello johnnix,

It works for me compared with non-subscript text, for example:

Code: Select all

procedure TForm1.Chart1AfterDraw(Sender: TObject);
var X, Y: Integer;
begin
  TChart(Sender).Canvas.Font.Size:=15;
  X:=100;
  Y:=X;
  TChart(Sender).Canvas.RotateLabel(X, Y, 'Normal Text <SUB>SubScript Text Here</SUB>', 45 , true);
end;

[johnnix]

Hello Narcis,

Could it be my version? I just tried a plot Title in HTML and that does not work also (double clicked a plot -> Titles -> Options -> Format HTML)

[Yeray]

Hello,

I've just checked it works in v2015.15 for me here:

Subscript.png (4.71 KiB) Viewed 28938 times

The position of the Subscript text isn't correct with oblique angles, but the text and the font size look correct.

Note I've added this to output the build version string on the chart title:

Code: Select all

uses TeeConst;

procedure TForm1.FormCreate(Sender: TObject);
begin
  Chart1.Title.Text.Text:=TeeMsg_Version;
end;

[johnnix]

... does not work for me What could be the issue?

[Yeray]

Hello,

What IDE are you using?

[johnnix]

Hello,

Delphi XE7 Version 21.0.17707.5020

[Yeray]

Hello,

Looking again at your screenshot I've seen what is making the difference here: RotateLabel method doesn't support HTML5 tags in GDI Canvas.
I've added it to the public tracker:
http://bugs.teechart.net/show_bug.cgi?id=1343

In the meanwhile you can use GDIPlus instead of GDI.

[johnnix]

Understood

[Yeray]

Hello,

Reviewing if it's worth implementing the support for the HTML in RotateLabel, doesn't GDIPlus satisfy your needs?

[Yeray]

Hello,

#1343 has been closed as "Won't Fix". We recommend moving to GDIPlus.