TightenLayout() resets custom layout options

[ismdiego]

I am using ScottPlot.WinForms 4.0.34, and I have found that if you customize the layout (for instance, changing the xScaleHeight), then when you move or zoom the plot with the mouse, the layout is reset. Other typical use case is when you use long tick labels and a rotation. When the layout is reset you cannot read the full label anymore.

I think I have found the "culprit" in FormsPlot.cs. Both in PbPlot_MouseUp and PbPlot_MouseWheel methods the Render method is called with recalculateLayout: true (hardcoded).

I think that this should be better suited with a configuration setting, like "enableResetLayout" (bool).

Anyway, many thanks for this fantastic library.

[swharden]

Thanks for the descriptive suggestion @ismdiego!

Like you suggested, I think the problem boils down to this getting called on MouseUp events:
https://github.com/swharden/ScottPlot/blob/01a2621d5e19b9dfad6f9768199f3dcf07d5509f/src/ScottPlot.WinForms/FormsPlot.cs#L99-L100

A good solution would be to ensure this "tightening" respects user-defined padding.

I'll take a closer look this weekend! Thanks again for the suggestion, and I'm happy to hear you enjoy this library 👍

[swharden]

doh! I already implemented this and I forgot. You can do this:

formsPlot1.plt.Layout(yLabelWidth: 100, xScaleHeight: 50);
formsPlot1.Configure(recalculateLayoutOnMouseUp: false);

The whole layout system will get refactored to make this easier in the future, but for now this should do the trick! Good luck! 👍

[swharden]

somehow I got confused which version this was in... I just published it on NuGet and that code should work in version 4.0.35 and up

[ismdiego]

Thank you very much, I confirm that it works as described in 4.0.35 😄

[ismdiego]

By the way, just a quick not-related question, can I lock the Y axis origin when doing zoom when x axis is locked? I mean, not allow Y axis min to be < 0... only >=0. It will be enough if you can point me to one sample or similar and I will investigate further on. I am not asking for a long answer.

Sorry about asking this here... I did not found a community forum or similar. If you prefer I can create a new issue with this content as a feature request or suggestion. Many thanks.

[swharden]

Hey @ismdiego, sorry about my last post - I accidentally answered a question in #451 in this thread.

can I lock the Y axis origin when doing zoom when x axis is locked?
I mean, not allow Y axis min to be < 0... only >=0

Yeah, I think you can do this with something like (#349)

formsPlot1.plt.AxisBounds(0, 50, -1, 1);

Let me know if that's what you were looking for.

[ismdiego]

No problem @swharden, I have just tested what you suggested and it works perfectly 😃

Thanks again

[swharden]

Great to hear! Glad you're enjoying ScottPlot 👍