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Bug 207

Summary:	[TV52015252] Anyway, if you just create a chart, display it on a form, set Align t...
Product:	VCL TeeChart	Reporter:	narcís calvet <narcis>
Component:	Other Components	Assignee:	Steema Issue Manager <issuemanager>
Status:	IN_PROGRESS ---
Severity:	major	CC:	david
Priority:	Normal
Version:	unspecified
Target Milestone:	---
Hardware:	All
OS:	All
Chart Series:	---	Delphi / C++ Builder RAD IDE Version:
Attachments:	VCL test to export series datetime values to JavaScript.

Description narcís calvet 2013-11-20 10:03:33 EST

If you just create a chart, display it on a form, set Align to alClient and then make it transparent (Chart.Color := clNone). Then when you resize the form the chart fails to repaint correctly. The problem is that the background doesn't get redrawn at all (TCustomTeePanelExtended.PaintBack) and this is all compounded by the including of WS_EX_TRANSPARENT in Params.ExStyle in TCustomTeePanel.CreateParams.

What I found was that it seemed better to comment out the WS_EX_TRANSPARENT code and then include some extra code in TCustomTeePanelExtended.PaintBack to call ThemeServices.DrawParentBackground if the window is transparent.
Code to reproduce:
procedure TForm1.FormCreate(Sender: TObject);
begin
 Chart1.Align:=alClient;
 Chart1.Color:=clNone;
end; [created:2010-10-28T13:18:00.000+01:00 reported by:narcis@steema.com reported in version:2010.01.11004 (TeeChart VCL)]

Comment 1 david berneda 2014-02-02 07:17:41 EST

The call to ThemeServices.DrawParentBackground seems to work fine.
I've added it to TeeProcs PaintBack method, but currently surrounded by a IFDEF USETHEMES, pending to verify if it works in all situations.

Comment 2 david berneda 2014-02-05 06:11:11 EST

Created attachment 82 [details]
VCL test to export series datetime values to JavaScript.

Comment 3 david berneda 2014-02-05 08:36:07 EST

The content of attachment 82 [details] has been deleted