Image always stored with white background

[msawczyn]

From a marketplace comment:

Love your program. However, I'm trying to save a model as an image, and/or print it, and the background is all white. All of the connector lines are white, so they disappear, making the image/print pretty useless. Is there a way to set the background color? A way to set connector line color would also be nice. A simple color setting in the general Properties for the model would do, similar to the one for individual entities.

[msawczyn]

This is an issue when you have an active dark theme.

The problem is that, while the Modeling SDK gives override capability for almost everything, the background of a stored image isn't one of them, and is set in a private method in the Diagram class.

To work around it, I've had to temporarily set the theme for a white background while the image is drawn. That will change the colors of all the elements to their defaults for a light background, but I don't see how to get around this without essentially a copy/paste of most of the Diagram class into my derived class and that's a really Bad Thing to do.

[vslee]

Is it possible to use reflection to call the private method?