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Bug 808

Summary:	SmallDots makes the pen to be used when it shouldn't
Product:	VCL TeeChart	Reporter:	yeray alonso <yeray>
Component:	Canvas	Assignee:	Steema Issue Manager <issuemanager>
Status:	RESOLVED FIXED
Severity:	major	CC:	david, johnnious
Priority:	High
Version:	131119
Target Milestone:	---
Hardware:	PC
OS:	Windows
URL:	http://www.teechart.net/support/viewtopic.php?p=66497#p66497
Chart Series:	---	Delphi / C++ Builder RAD IDE Version:

Description yeray alonso 2014-06-20 06:16:39 EDT

In v2013.09 Canvas.Pen changed from TPen to TTeePen.
TTeePen has SmallDots and it seems when it's "true" the pen is drawn even having  psClear Style!
Look at the AfterDraw event in the example below.

Then, having Zoom.Pen.SmallDots to true and BevelOuter to bvNone, if you unzoom the chart, a border is drawn on the chart using the zoom pen.

var Chart1: TChart;

procedure TForm1.FormCreate(Sender: TObject);
begin
  Caption:=TeeMsg_Version;

  Chart1:=TChart.Create(Self);

  with Chart1 do
  begin
    Parent:=Self;
    Align:=alClient;

    Color:=clWhite;

    AddSeries(TLineSeries).FillSampleValues;
    Canvas:=TTeeCanvas3D.Create;

    Zoom.Pen.SmallDots:=true;
    Zoom.Pen.Color:=clRed;
    BevelOuter:=bvNone;

    OnAfterDraw:=Chart1AfterDraw;
  end;
end;

procedure TForm1.Chart1AfterDraw(Sender: TObject);
begin
  with Chart1.Canvas do
  begin
    Pen.Color:=clRed;
    Pen.Style:=psClear;
    Pen.SmallDots:=true;

    Line(0, 0, Chart1.Width, Chart1.Height);
  end;
end;

Comment 1 david berneda 2014-06-20 13:52:05 EDT

Fixed. 
SmallDots=True was always being considered as "non clear" pen style.

The fix also works fine with GDI+ canvas.

Fixed at TeCanvas.pas unit, TeeSetTeePen method:

begin
  if APen.SmallDots and (APen.Style<>psClear) then 
  ...