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Bug 1274

Summary: [TV52014696] A customer proposed an override of the event OnDraxAxisLabel: now: ...
Product: VCL TeeChart Reporter: yeray alonso <yeray>
Component: AxisAssignee: Steema Issue Manager <issuemanager>
Status: CONFIRMED ---    
Severity: enhancement CC: linus.hogrebe
Priority: High    
Version: unspecified   
Target Milestone: ---   
Hardware: All   
OS: All   
Chart Series: --- Delphi / C++ Builder RAD IDE Version:

Description yeray alonso 2015-08-18 06:40:32 EDT 
A customer proposed an override of the event OnDraxAxisLabel:
now:
procedure OnDrawAxisLabel(Sender:TChartAxis; var X,Y,Z:Integer; var Text:String; var DrawLabel:Boolean);
proposed:
procedure OnDrawAxisLabel(Sender:TChartAxis; var X,Y,Z:Integer; var Text: string; const aValueOfTick: Float; var DrawLabel:Boolean);
"This will make it easier for me than converting a string to a float or a datestring to a float. I know that not all series have a value of a tick but those axis that have this information it would be much faster and easier to rearrange labels."
Forum discussion:
http://www.teechart.net/support/viewtopic.php?f=3&t=10785&view=unread#unread [created:2010-02-24T14:10:18.000+02:00 reported by:yeray reported in version:9.0 (TeeChart VCL)]
Comment 1 yeray alonso 2015-08-18 07:04:19 EDT 
Another customer suggests us to have an extra event instead of changing the actual OnGetAxisLabel:

"In case changing the existing callback is problematic due to compatibility reasons, an alternative might be to provide an additional one, such as shown below?

Function TChartAxis.LabelValue(Const Value:Double):String;
var tmp : String;
Begin
  ///////////////////////////////////////////////////////////////
  if Assigned(ParentChart.FOnGetCustomAxisLabel) then
     Result := ParentChart.FOnGetCustomAxisLabel(TChartAxis(Self), Value)
  ///////////////////////////////////////////////////////////////
  else
  begin
  if IAxisDateTime then
  begin
    if FDateTimeFormat='' then tmp:=DateTimeDefaultFormat(IRange)
                          else tmp:=FDateTimeFormat;

    DateTimeToString(result,tmp,Value);
  end
  else
    result:=FormatFloat(FAxisValuesFormat,Value);

  if Assigned(ParentChart.FOnGetAxisLabel) then
     ParentChart.FOnGetAxisLabel(TChartAxis(Self),nil,-1,Result);

  if FLabels.MultiLine then
     result:=ReplaceChar(result,' ',TeeLineSeparator);
  end;
end;"

http://www.teechart.net/support/viewtopic.php?p=69719&#p69719