Problem with Gradient and Marks lines in VolumePipe

[MVBobj]

Hi,

How do I set (or turn off) the gradient in the VolumePipe?

TeeChart1.jpg (124.98 KiB) Viewed 5773 times

It makes no difference whether Gradient is checked or unchecked or set to Left Right or Top Bottom - the chart looks the same.

Also - how do I set the Maks Arrows for the VolumePipe? Because of the Series Cone Percent, the Mark can be some distance from its segment.

TeeChart2.jpg (133.89 KiB) Viewed 5773 times

I'm not having much luck getting the Mark's Arrows to show up - above are the placement of the visible Pointers.

Thanks.
.

[Yeray]

Hello,

How do I set (or turn off) the gradient in the VolumePipe?

It makes no difference whether Gradient is checked or unchecked or set to Left Right or Top Bottom - the chart looks the same.

I guess the gradient you are trying to disable is the 3D effect. If you set the chart to 2D then you won't see it.

Also - how do I set the Maks Arrows for the VolumePipe? Because of the Series Cone Percent, the Mark can be some distance from its segment.

I'm not having much luck getting the Mark's Arrows to show up - above are the placement of the visible Pointers.

You can create a customized TVolumePipeSeries overriding the DrawMark method to change ChartRect.Top property before drawing each mark (and restore after the drawing). Ie:

Code: Select all

type
  TMyVolumePipeSeries = class(TVolumePipeSeries)
    protected
      procedure DrawMark(ValueIndex: Integer; const St: String; APosition: TSeriesMarkPosition); override;
  end;

  TVolumePipeSeriesAccess = class(TVolumePipeSeries)
  end;
//...
procedure TForm1.FormCreate(Sender: TObject);
begin
  Chart1.View3D:=false;

  with Chart1.AddSeries(TMyVolumePipeSeries) as TMyVolumePipeSeries do
  begin
    FillSampleValues();
    Brush.Gradient.Visible:=false;

    Marks.Visible:=true;
  end;
end;

procedure TMyVolumePipeSeries.DrawMark(ValueIndex: Integer; const St: String;
  APosition: TSeriesMarkPosition);
var oldTop, xVal, yDisp, IDiff, overallWidth: Integer;
    BoundingPoints: TFourPoints;
    tmp: TCoordinate;
    tmpCone : Single;
begin
  oldTop:=ParentChart.ChartRect.Top;

  With ParentChart.ChartRect do
  Begin
    BoundingPoints[0]:= TeePoint(Left+2,Top+2);  //topleft

    tmpCone:=(ConePercent div 2)*0.01;
    tmp:={$IFNDEF FMX}Round{$ENDIF}(Top+(Bottom-Top) * tmpCone);

    BoundingPoints[1]:= TeePoint(Right-2, tmp); //topright

    tmp:={$IFNDEF FMX}Round{$ENDIF}(Bottom-((Bottom-Top) * tmpCone));

    BoundingPoints[2]:= TeePoint(Right-2, tmp); //bottomright
    BoundingPoints[3]:= TeePoint(Left+2,Bottom-2); //bottomleft
  end;

  IDiff:=BoundingPoints[1].Y-BoundingPoints[0].Y;
  overallWidth:=BoundingPoints[1].X-BoundingPoints[0].X;
  xVal:=TVolumePipeSeriesAccess(Self).CalcSegment(ValueIndex,YValues[ValueIndex])+BoundingPoints[0].X; //add left displacement
  yDisp:=Round((((xVal-BoundingPoints[0].X)/overallWidth)*IDiff));

  ParentChart.ChartRect.Top:=BoundingPoints[0].Y+yDisp;

  inherited;

  ParentChart.ChartRect.Top:=oldTop
end;