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Bug 1309

Summary:	Scaling a layout with a chart gets pixelated
Product:	FireMonkey TeeChart	Reporter:	yeray alonso <yeray>
Component:	Chart	Assignee:	Steema Issue Manager <issuemanager>
Status:	RESOLVED FIXED
Severity:	enhancement	CC:	david
Priority:	---
Version:	unspecified
Target Milestone:	---
Hardware:	PC
OS:	Windows
URL:	http://www.teechart.net/support/viewtopic.php?f=17&t=15759
Chart Series:	---	Delphi / C++ Builder RAD IDE Version:
Attachments:	test project

Description yeray alonso 2015-09-17 03:59:51 EDT

Created attachment 499 [details]
test project

Incrementing the Scale in either a Layout containing a TChart or directly in a TChart, stretches the chart and it looks pixelated.

See the attached project.

Comment 2 yeray alonso 2015-09-17 04:02:04 EDT

Reproduced with RAD 10 Seattle and TeeChart v2015.16.

Comment 3 david berneda 2016-04-04 03:54:31 EDT

The problem is firemonkey's layout scale does not work fine if the Chart has a "buffered canvas".

In the latest TeeChart code, buffered is now disabled by default, so this problem no longer exists.

Workaround for previous TeeChart versions is to disable buffered (set to FALSE):

 Chart1.BufferedDisplay:=False;

Adding a checkbox to this issue attached test project shows the difference:

procedure TForm1.CheckBox3Change(Sender: TObject);
begin
  Chart1.BufferedDisplay:=CheckBox3.IsChecked;
  Chart1.Invalidate;

  Chart2.BufferedDisplay:=CheckBox3.IsChecked;
  Chart2.Invalidate;
end;