Steema Central

Posted: **Tue Jun 16, 2020 8:01 pm**

I have a fast line chart that is representing an Oscilloscope. The Bottom axis maximum points vary continuously so I am resetting that value repeatedly. My problem comes in that if I have zoomed in on the graph, the x-axis zooms back out as soon as I change the maximum value and the zoom is lost. How do I get it to "Stick" Thanks.

: This is before zoom; good1.png (5.85 KiB) Viewed 10135 times

: This is after zoom; zoomed.png (8.19 KiB) Viewed 10135 times

As soon as I run this:
chart.Axes.Bottom.Minimum = 0
chart.Axes.Bottom.Maximum = CurrMaxPoints

It zooms back out. I want it to stay focused on the same area of the graph.

Posted: **Wed Jun 17, 2020 4:10 pm**

el1179 wrote: ↑
Tue Jun 16, 2020 8:01 pm
As soon as I run this:
chart.Axes.Bottom.Minimum = 0
chart.Axes.Bottom.Maximum = CurrMaxPoints

It zooms back out. I want it to stay focused on the same area of the graph.

I'd have to see more of your code to have a clear understanding of what's going on, but staying focused on the same area of the graph means choosing very carefully the Minimum and Maximum axis values.

Posted: **Fri Jun 19, 2020 2:32 pm**

The 0-360 are just the labels and the actual points are 0 to anywhere from 5k-30k points. Since that high end changes every second or so I need to keep it up to date to show accurately.

I was able to find a simple suitable workaround where I do not change the bottom axis points when it is zoomed. If zoom cleared they get updated.

Steema Central

Zoom gone after setting bottom axis max points

Zoom gone after setting bottom axis max points

Re: Zoom gone after setting bottom axis max points

Re: Zoom gone after setting bottom axis max points