59 lines
1.8 KiB
Julia
59 lines
1.8 KiB
Julia
"""
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```julia
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legend_pos_from_angle(theta, xmin, xcenter, xmax, ymin, ycenter, ymax, inout)
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```
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Return `(x,y)` at an angle `theta` degrees from
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`(xcenter,ycenter)` on a rectangle defined by (`xmin`,
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`xmax`, `ymin`, `ymax`).
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"""
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function legend_pos_from_angle(theta, xmin, xcenter, xmax, ymin, ycenter, ymax)
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(s, c) = sincosd(theta)
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x = c < 0 ? (xmin - xcenter) / c : (xmax - xcenter) / c
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y = s < 0 ? (ymin - ycenter) / s : (ymax - ycenter) / s
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A = min(x, y)
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return (xcenter + A * c, ycenter + A * s)
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end
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"""
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Split continuous range `[-1,1]` evenly into an integer `[1,2,3]`
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"""
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function legend_anchor_index(x)
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x < -1 // 3 && return 1
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x < 1 // 3 && return 2
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return 3
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end
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"""
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Turn legend argument into a (theta, :inner) or (theta, :outer) tuple.
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For backends where legend position is given in normal coordinates (0,0) -- (1,1),
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so :topleft exactly corresponds to (45, :inner) etc.
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If `leg` is a (::Real,::Real) tuple, keep it as is.
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"""
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legend_angle(leg::Real) = (leg, :inner)
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legend_angle(leg::Tuple{S,T}) where {S<:Real,T<:Real} = leg
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legend_angle(leg::Tuple{S,Symbol}) where {S<:Real} = leg
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legend_angle(leg::Symbol) = get(
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(
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topleft = (135, :inner),
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top = (90, :inner),
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topright = (45, :inner),
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left = (180, :inner),
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right = (0, :inner),
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bottomleft = (225, :inner),
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bottom = (270, :inner),
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bottomright = (315, :inner),
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outertopleft = (135, :outer),
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outertop = (90, :outer),
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outertopright = (45, :outer),
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outerleft = (180, :outer),
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outerright = (0, :outer),
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outerbottomleft = (225, :outer),
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outerbottom = (270, :outer),
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outerbottomright = (315, :outer),
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),
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leg,
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(45, :inner),
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)
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