20 lines
727 B
Factor
20 lines
727 B
Factor
! Copyright (C) 2016-2017 Alexander Ilin.
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USING: kernel ui.gadgets ;
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IN: charts
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TUPLE: chart < gadget ;
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M: chart pref-dim* drop { 300 300 } ;
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! Return the x and y ranges of the visible area.
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: chart-axes ( chart -- seq )
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drop { { 0 300 } { 0 300 } } ;
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! There are several things to do to present data on the screen.
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! Map the data coordinates to the screen coordinates.
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! Cut off data outside the presentation window. When cutting off vertically, split the line into segments and add new points if necessary. Return an array of line segments.
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! Remove redundant points from the drawing pass.
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! chart new line new COLOR: blue >>color { { 0 100 } { 100 0 } { 100 50 } { 150 50 } { 200 100 } } >>data add-gadget gadget.
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