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Elias Naur
86bc3e612d
Before this change, clients were expected to set up the current material (color or image) before laying out Labels and Editors. This was done to avoid garbage from a hypothetical material interface covering both colors and images. However, some widgets need more than one material: the Editor had HintImage for the hint text material. This change implements generalized materials through blocks: anywhere a material is expected, a ui.BlockOp is is assumed to contain the operation(s) needed for setting the desired material. This way we avoid allocations (interfaces) and keep the abstraction over material types. Signed-off-by: Elias Naur <mail@eliasnaur.com>