Missing dark theme support

When using a dark theme PP won’t adapt to it. It would be cool to support custom colors for icons, fonts diagrams and backgrounds.

---

Current open issues:

• Embedded HTML pie charts should use light/dark CSS
• color of text in diagram legend does not change
• charts still have white background - for example when displayed on the dashboard
• monthly / yearly returns table looses the colored background when in dark mode
• currency diagrams use black color for data series - not visible in dark mode
• Money Trail Tooltip
• Preferences in light mode have grey bars
• highlight colors in tables (for example if the trade is open)
• check use of org.eclipse.swt.display.useSystemTheme

If you find more issues, post screenshots to this issue.

[vwkd]

Looks like this issue is about Dark Mode which does exists now, except that a “use system theme” option is missing. Would appreciate this to be added.

[buchen]

If you want to help styling the dark theme of PP, then this is a good introductory article: https://www.vogella.com/tutorials/Eclipse4CSS/article.html

SWT uses CSS files to style the components, but in the end it is a custom implementation, not HTML. Therefore the behavior is not always really predictable. There are lots of custom properties starting with “swt-”. With a little bit of trial and error I was able to create the result above.