Draw Legend

[fredff13]

Hi,

After I downloaded update from October 5 for version 2010 I found a bug: the legend drawn after chart drawn event (see below) not fully covers old one. Old legend's first item above newly drawn legend items (I think that all other covered).

procedure TfrmMain.chartAfterDraw(Sender: TObject);
begin
(Sender As TChart).Legend.DrawLegend;
end;

[Yeray]

Hi fredff13,

I'm not sure to understand what are you exactly trying to do, and neither what is the exact difference in behaviour between versions you see.
Could you please arrange a simple example project we can run as-is to reproduce the problem here?
Thanks in advance.

[fredff13]

Hi, I set Legend.Visible to False to avoid drawing at position which not matching run-time one. It's still a bug as it has not been observed in previous version (legend was drawing on top of each other, so fully covered "visible" legend). See attached screen shots.

Thanks, Fred

Drawing Legend with updated version

DrawLegend.jpg (191.29 KiB) Viewed 9037 times

[Narcís]

Hi fredff13,

As Yeray already asked, it would be very helpful for us to be able to provide an accurate answer if you could provide a simple example project we can run "as-is" to reproduce the problem here.

Thanks in advance.

[fredff13]

I have attached simple project as you requested

[Narcís]

Hi fredff13,

In which TeeChart version do you think this worked fine? Also, what are you trying to achieve with this? We may be able to provide an alternative solution.

Thanks in advance.

[fredff13]

Hello, I just pointed to that version before the latest update has not such effect. Legend design-time position was the same as was drawn by DrawLegend function.

Thanks, Fred

[Narcís]

Hi Fred,

Thanks for the information. I found that v2010.00.00407 worked as you expected while this behaviour changed in v2010.01.11004. I have added the issue to the defect list (TV52015261) to be investigated.

[Narcís]

Hi Fred,

I just wanted to inform you that I have fixed this bug for the next TeeChart 2010 VCL maintenance release. If you are a source code customer you can implement the fix at your end doing a little change at Chart.pas. At TCustomChartLegend.DrawLegend method add tmpRect variable of TRect type and change this code:

Code: Select all

      with tmpChart.ChartRect do
        ShapeBounds.Top:=Top+tmp+Round(1.0*FTopLeftPos*(Bottom-Top-tmp)*0.01);

for this:

Code: Select all

      if {$IFNDEF CLR}TCustomChartAccess{$ENDIF}(ParentChart).CustomChartRect then
        tmpRect:=tmpChart.ChartRect
      else
        tmpRect:=tmpChart.ChartBounds;

      with tmpRect do
        ShapeBounds.Top:=Top+tmp+Round(1.0*FTopLeftPos*(Bottom-Top-tmp)*0.01);