Is it possible to have html rendered in text of Node/Link?
No, all of the drawing is done to a Canvas element (or to SVG). You can simulate the effect of markup by composing TextBlocks and Pictures and Shapes in a Panel as the label of a Link.
Is it possible to have html rendered in text of Node/Link?
No, all of the drawing is done to a Canvas element (or to SVG). You can simulate the effect of markup by composing TextBlocks and Pictures and Shapes in a Panel as the label of a Link.