Added double buffering to remove flickering

[rocky3355]

The GUI elements were flickering due to missing buffering. Adding double buffering seemed to introduce issues with the rendering order, i.e. the texts below the Speedmeters would always be drawn over. As a workaround these texts were changed to be children of their corresponding Speedmeters.

[WouterJD]

I see you use .MinWidth instead of .Width, please explain the difference (I cannot find definitions).
Also, I rounded all calculations to int (to avoid complaints from wxpython); any reason why you don't?

Always happy to learn :-)

[rocky3355]

I see you use .MinWidth instead of .Width, please explain the difference (I cannot find definitions). Also, I rounded all calculations to int (to avoid complaints from wxpython); any reason why you don't?

Always happy to learn :-)

Well, the "TextCtrl" does not seem to have a "Width" property, only "MinWidth" and "MaxWidth". I tried to use MaxWidth, but it was always set to -1. That's the simple reason I ended up using the MinWidth property 😄 Maybe the "Size" property or something else stores the real current width, but I never worked with wxpython before.

For the integer rounding, I wasn't really thinking about this when quickly trying to find a solution. For sure, rounding them to int is the better approach ;)