regarding TikZ: If I create an ellipse, which should be filled black, I don't have anything to do (black is the default), but the result doesn't show up a filled ellipse
The problem is actually independent of this that this was an ellipse. The problem is actually about filling with the default colour. In such a case the intention of the code was to specify only that you need to fill, but not to specify what colour to use --- as TikZ would just use the default.
However, the implementation was incomplete --- hence the bug.
addition of new file jpicedt/jpicedt/format/output/tikz/ParameterString.java
Correction consists in replacing \draw by \fill, \filldraw or \path, which ever applicable depending on the fill status or line status when the color is default.
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The problem is actually independent of this that this was an ellipse. The problem is actually about filling with the default colour. In such a case the intention of the code was to specify only that you need to fill, but not to specify what colour to use --- as TikZ would just use the default.
However, the implementation was incomplete --- hence the bug.
Correction was made into
Correction consists in replacing \draw by \fill, \filldraw or \path, which ever applicable depending on the fill status or line status when the color is default.