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LabWindows/CVI

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Graph control manual axis limit change bug

I have a simple graph control in my program that displays an XY curve (using a linear xy scale, with x axis gain and offset set to specific (double) values) . The axes are set to Editable, which allows me to change the limits on X and Y axes in GUI. The changes work correctly, except when I change the X maximum value - it changes to the newly set value, but causes a simultaneous change in the X minimum value, setting it to a large negative number.

 

This only happens when I use X Gain setting that is less than 1.0.

 

The behavior when changing X minimum value is normal and doesn't affect the X maximum value.

 

It looks like a bug.

 

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Message 1 of 6
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Well, attach a VI containing default data in the graph so we get an idea what you are describing.

 

 

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Message 2 of 6
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This is LabWindows not Labview. What type of files are you looking for?

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Can you pare it down to a minimal example project? Or modify a sample project slightly that comes with CVI? Then some people here would be able to replicate it and help.

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Here is a simple example project I created.

After hitting the Plot button, a simple diagonal curve is drawn. Box X and Y axes limits can be manually changed. Only the change in X axis Maximum value creates a problem.

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Message 5 of 6
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Here is a simple example project I created.

After hitting the Plot button, a simple diagonal curve is drawn. Box X and Y axes limits can be manually changed. Only the change in X axis Maximum value creates a problem.

 

Do you have any suggestions?

 
 
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