The attached patch: Renames class GraphicInset as GraphicRenderer. Defines class ButtonRenderer (same metrics, draw functions as InsetButton). Both these classes are derived from RenderedInset.
insets/graphicsinset.[Ch] is renamed as insets/renderers.[Ch]. Contains code for RenderedInset, ButtonRenderer, GraphicRenderer. InsetExternal stores a boost::scoped_ptr<RenderedInset> renderer_ var, allowing it to change dynamically the way the external data is rendered on screen. mathed/button_inset.[Ch] is removed. Mathed's commandInset now has a ButtonRenderer button_ member which is used to draw the inset on screen. If you like this, then I guess that the next step is to remove InsetButton and to use ButtonRenderer further. Comments/Suggestions? -- Angus
renderers.diff.gz
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