Cached canvas #3
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Only redraw when new data is available
Create the first version of the cached_canvas struct. This struct acts as both a canvas and a render. It allows us to only draw when new data is available. This is perfect for renders that infrequently update the canvas (TransitBoard) and pull down data on a fixed cadance.
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Create the first version of the cached_canvas struct. This struct acts
as both a canvas and a render. It allows us to only draw when new data
is available. This is perfect for renders that infrequently update the
canvas (TransitBoard) and pull down data on a fixed cadance.