Hello,
I'm using Microsoft Visual Studio 2010 together with NI Measurement Studio 2010 to create a "simple" graph plotting application.
To make the matter not too simple I am using WPF with the WindowsFormsHost element to host a NationalInstruments.UI.WindowsForms.ScatterGraph control.
So far, this pretty much works as expected.
At first I only noticed that once in a while the application would just hang. I debugged a lot and noticed that the problem is found somewhere in the interoperability between WPF and WinForms. Although I started to doubt the use of WPF, I further noticed that the WPF window messaging handler was waiting for something. That something turned out to be the ScatterGraph control... !?
I further narrowed the problem to the scaling functionality of the ScatterGraph control. The hang would only happen if I set the Mode property of the x and y axes to AxisMode.AutoScaleLoose and then change the ScaleType of those axes to ScaleType.Logarithmic. Of course I called PlotXY() on the Plot that is attached to that ScatterGraph. "Unfortunately" the problem only occurs with specific data that gets plotted...
While debugging I monitored the xAxis.Range.Minimum and yAxis.Range.Minimum values and both remained 0 after setting the Mode property to AutoScaleLoose. If I used AutoScaleExact instead the problem would not occur because both range minimum values became greater than zero afterwards. The problem also would not occur if I set the Mode property to Fixed, specified a custom scale range with both x minimum and y minimum set to 1 (other values below 1 also won't work...) and then changed the ScaleType to Logarithmic.
I would appreciate any help to solve this problem because I almost spent a whole week of my job to find a solution.
Thanks in advance.
Hagen
