I need to offset the text to the left for callout tags where the leader line leans to the left of the item they are describing (subtract width amount from x coordinate) - but I have yet to figure a way to extract the "rendered" width of the longest line to do so.
+3
I use boundingbox on the text attribute and extract its dimensions.
You need to (trial and error) adjust the value somewhat.
It is very dependant on the font type.
Look:
creates:
and zoomed in:
There is a tcl/TkCmd Font (wich has for instance Measure function) Wich is in pixels tough.
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