factor/charts.factor

20 lines
727 B
Factor

! Copyright (C) 2016-2017 Alexander Ilin.
USING: kernel ui.gadgets ;
IN: charts
TUPLE: chart < gadget ;
M: chart pref-dim* drop { 300 300 } ;
! Return the x and y ranges of the visible area.
: chart-axes ( chart -- seq )
drop { { 0 300 } { 0 300 } } ;
! There are several things to do to present data on the screen.
! Map the data coordinates to the screen coordinates.
! 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.
! Remove redundant points from the drawing pass.
! chart new line new COLOR: blue >>color { { 0 100 } { 100 0 } { 100 50 } { 150 50 } { 200 100 } } >>data add-gadget gadget.