Thanks. By the way, among the advantages of that kind of approach would be the ability to create a scrolling (along the x-axis) TChart that could request a new "window" of data when it was scrolled.

I'm suggesting that a series be able to request the data when it's needed. So, e.g., the getter for XValues.Count would actually call an event, and the event handler would return the count. Similarly, the getter for XValues would call an event, returning the value for index i. This way, there would ...

Is there anywhere the concept of a set of chart series that are request there data when needed? I have an application that carries around a large amount of data, much of which needs to be plotted. Adding points to chart series essentially doubles the size of the data requirement. If there were inste...

Thanks - we'll look a little further first - there is also another third-party component in the same form and we need to rule out one or the other before digging in deeper. Hi Jim, This is really difficult to guess without being able to reproduce the issue here. If you could find a way to reproduce ...

One of my users is experiencing a "Not enough storage is available to process this command" message (and subequent crash) when he tries to resize a modal window containing a page control having TChart instances on 2 of its 4 pages. I cannot reproduce it on my machine (2560 x 1600 screen). I believe ...

I did it at runtime, like this: aChart.Aspect.Orthogonal := true; aSS := TSurfaceSeries.Create(nil); aSS.Pen.Visible := false; aSS.ParentChart := aChart; aPS := TPoint3DSeries.Create(nil); aPS.LinePen.Visible := false; aPS.ParentChart := aChart; aPS.Pointer.Draw3D := true; aPS.DepthSize := 1; aPS.On...

Hi Jim, This happens when Chart1.Aspect.Orthogonal:=false; and the difficulty to convert from 2D screen coordinates to 3D chart coordinates. This is a known issue and is very difficult to solve as neither GDI nor GDI+ provide methods for such conversions. I tried both chtAC.Aspect.Orthogonal := tru...

Hi Jim, This happens when Chart1.Aspect.Orthogonal:=false; and the difficulty to convert from 2D screen coordinates to 3D chart coordinates. This is a known issue and is very difficult to solve as neither GDI nor GDI+ provide methods for such conversions. Understood, in general, but you do the geom...

I'm creating a TPoint3DSeries, aPS, on the fly and putting it along with a TSurfaceSeries, aSS, on a chart as follows: aPS := TPoint3DSeries.Create(nil); aPS.LinePen.Visible := false; aPS.ParentChart := aChart; aPS.Pointer.Draw3D := true; aPS.DepthSize := 1; aPS.OnGetMarkText := Self.GetMarkText; aP...

They do EXACTLY the same thing: one chart always lags the other, unless you move the trackbar VERY slowly. I found, though, that this works: Chart1.View3dOptions.Elevation := x; Chart1.Repaint; Chart2.View3dOptions.Elevation := x; Chart2.Repaint; You need BOTH Repaint calls or it's still the same be...

This doesn't change anything. Actually, after implementing it, I can't see why it would. The issue seems to be that, internally, only one chart wants to be updating at a time and someone, one of them takes precedence. I tried the following experiment. I deleted the one that was "lagging" and recreat...

I have 2 TCharts, A and B, each displaying a TIsoSurfaceSeries. I have a trackbar T with the following OnChange handler: A.View3DOptions.Elevation := T.Position; B.View3DOptions.Elevation := T.Position; and I drag the trackbar around. One of the charts updates smoothly immediately, the other only wh...