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transparent backgrounds for FormsPlot and WpfPlot

See original GitHub issue

Is it possible to set transparent background on formsPlot control in WinForms?

formsPlot.plt.Style(figBg: Color.Transparent); 
formsPlot.plt.Style(dataBg: Color.Transparent);

This makes blue background as we see in the designer. It seems that bitmap can be generated with transparency, but I need it in WinForms control.

Issue Analytics

State:
Created 4 years ago
Comments:9 (6 by maintainers)

Top GitHub Comments

1reaction

swhardencommented, Mar 7, 2020

It’s possible to remake FormsPlot control to not use PictureBox. plt.GetBitmap() manualy draw to control canvas in OnPaint method. @swharden can reveal the reasons why PictureBox is used now.

@StendProg I think the reason I did this is because PictureBox has simple and robust support for double buffering. Drawing directly on the control may produce flickering. This is my understanding, but I haven’t explored this topic in a while - if you are aware of a better way let me know!

0reactions

swhardencommented, Mar 7, 2020

For what it’s worth, I added support (and a demo) for the WpfPlot control too.

It was hard to track down, but the only change needed was to modify the encoder for bmp.Save:

https://github.com/swharden/ScottPlot/blob/22e7e23e4a6bb8877a0a801ce1a9557e620ceba8/src/ScottPlot.WPF/WpfPlot.xaml.cs#L82-L92

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