Ok, I modified the code so I am not changing any of the TChartScrollBar's properties. I get the same behavior. I've sent you an email with three screen shots to show what's happening.

I've been waiting to hear about a problem I posted in another thread entitled "working with large datasets". I'm trying to figure out how to keep the h-axis from adjusting itself improperly.

I'm waiting to hear if there is a way to fix this problem...

We have data that has no negative values, but the scrolling mechanism I've gotten to work insists on showing a bunch of negative axis space.

How can this be remedied? Is there another way to handle this kind of zoom/scrolling?

After further investigation, it appears that the ChartScrollBar object ignores the Automatic setting of the chart it's attached to and changes the Min and Max properties so they're [-n,n] where n = (ChartScrollBar.Max-ChartScrollBar.Min)/2. I set up a ChartScrollBar1Change handler and tried resettin...

Ok, through some trial-and-error, I've come up with the following chunk of code. It's located in a Redraw function that's called each time a spinner value changes. if (ScrollFactor_spin.Value = 1) then begin Chart.BottomAxis.Automatic := true; Chart.AllowPanning := pmNone; ChartScrollBar1.Enabled :=...

Thanks, Marjan, this helps a little. I guess what I'm looking for is something more along the lines of: how do I implement the scrolling within TeeChart? The data sampling isn't a problem -- we're used to dealing with that issue. Can you point me to an example of how to deal with situations where th...

oops... I didn't notice this. Thanks for pointing it out!

We're working with very large data sets (10^5..10^8) and we need the ability to display data in scrollable chunks. For example, we need to render 10^6 data points into, say, 10^5 pixels. However, we want the user to be able to scroll across the display window width, eg., 500 or 1000 pixels, without ...

We're working with very large data sets (O(6)-O(8)) and we need the ability to display data in scrollable chunks. For example, we need to render 10^6 data points into, say, 10^5 pixels. However, we want the user to be able to scroll across the display window width, eg., 500 or 1000 pixels, without h...