Hello,

It would help if you could arrange a simple example project to see what you are exactly doing.

Hello, You should calculate the Interpolation points and draw the line manually. You could use the AnnotationTool to draw the difference value. Here a simple example: Dim XPos, YVal1, YVal2 As Double Private Sub Form_Load() With TChart1 .Aspect.View3D = False .Legend.Visible = False .Panel.Gradient....

Hello,

Have you tried using StretchDraw as suggested?

Hello Ed,

What exact example are you trying to find the sources of?

Hello,

I've just sent a mail with a private download link.

Alex,

The only way to achieve this is by adding a dummy series (with no data) as follows:

Hello,

We'll send you a zipped installation if you tell us what IDE are you using.

Hello,

I've replaced all the that {$IFNDEF NOUSE_BDE} for {$IFNDEF NOTEEDB} in this unit. That way, only Starter IDEs, which don't have DB, won't have access to Dataset.

Hello,

You are setting the series LinePen.Color, which is ok for the lines connecting the 3d points, but you should set the main series' Color.

Hello Toreba, The issue is that you are calculating the first and last visible values in the series when the axis hasn't been yet recalculated. That's why this can be solved forcing a chart repaint Self.chtFastLine.Draw; or simply a bottom axis recalculation Self.chtFastLine.Axes.Bottom.AdjustMaxMin...

Hello, It seems to work fine for me here: Project1_2020-09-30_11-15-02.png procedure TForm1.FormCreate(Sender: TObject); var Chart1: TChart; ChartListBox1: TChartListBox; begin Chart1:=TChart.Create(Self); ChartListBox1:=TChartListBox.Create(Self); with Chart1 do begin Parent:=Self; View3D:=False; A...

Hello, You could wrap the text to fit the length you wish. In this case you may want to use ChartRect.Height . Ie: procedure TForm1.WrapLeftAxisTitle(aChart: TChart; const aHeight: Integer); var lOneLineTitle: String; lTitleHeight: Integer; lTitle: TChartAxisTitle; lHeight: Integer; begin Assert(aCh...

Hello Alex, TeeChart doesn't draw an axis when no series uses it and LabelStyle is set to its default value: talAuto . Also, you may want to set some min and max. Ie: Chart1.Axes.Bottom.SetMinMax(0,10); Chart1.Axes.Bottom.LabelStyle:=talValue; Chart1.Axes.Left.SetMinMax(0,10); Chart1.Axes.Left.Label...

Hello Teri,

Try to add the design time package (DclTeePro927.bpl) from the "Delphi27\Delphi27.win32\Bin" folder in your TeeChart installation into the "Components/Install packages" list.

Hello,

The TQRChart packages you are using may be referencing the DclTee (Standard) package instead of the DclTeePro package.
Find here the packages precompiled for RAD Tokyo 10.2.3, QuickReport 6 and TeeChart Pro v2020.30: