GDI & GDI+...

[Steve Maughan]

Hi,

It looks as if the new version of TChart uses GDI+ by default. Most of the charts look really good. However, some interactive charts seems a little slow. Is there a way to go back to vanilla GDI rendering.

I right clicked and selected options and then the "Chart Gallery" tab. It says the chart is being rendered as GDI, but from the anti-aliasing it must be GDI+ (unless there is some sort of GDI anti-aliasing going on). Also what does Mode do (Normal and Alternate) do?

Thanks,

Steve

[Yeray]

Hi Steve,

Different things here.

It looks as if the new version of TChart uses GDI+ by default. Most of the charts look really good. However, some interactive charts seems a little slow. Is there a way to go back to vanilla GDI rendering.

Change the "Render" option at the "New Chart" tab in the "Options..." dialog, from GDI+ to GDI:


It can't be seen in the preview chart in the dialog, but you'll see the change if you drop a new chart into a form.

I right clicked and selected options and then the "Chart Gallery" tab. It says the chart is being rendered as GDI, but from the anti-aliasing it must be GDI+ (unless there is some sort of GDI anti-aliasing going on).

This option is to change it for the charts that are created to show the Series Gallery:

GDIPlusGallery.png (101.86 KiB) Viewed 6989 times

However, I see this option doesn't take effect. We'll try to fix in for next releases (TV52016653).

Also what does Mode do (Normal and Alternate) do?

Alternate mode activates the new series gallery "alternate" mode, that looks different:

alternate_gallery.png (58.95 KiB) Viewed 6988 times

[Steve Maughan]

Thanks Yeray!

I upgrading my application from XE3 with the previous version of TeeChart to the latest i.e. I'm not creating new charts. How do I change the rendering of the charts which have already been created to either GDI or GDI+?

Thanks,

Steve

[Narcís]

Hi Steve,

You can do it either at design-time (as Yeray explained) or at run-time as shown here:

Code: Select all

uses VCLTee.TeCanvas;

procedure TForm1.FormCreate(Sender: TObject);
var GdiP: Boolean;
begin
  GdiP:=False;

  if GdiP then
    Chart1.Canvas:=TGDIPlusCanvas.Create
  else
    Chart1.Canvas:=TTeeCanvas3D.Create;
end;