634 lines
21 KiB
Julia
634 lines
21 KiB
Julia
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# xaxis(args...; kw...) = Axis(:x, args...; kw...)
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# yaxis(args...; kw...) = Axis(:y, args...; kw...)
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# zaxis(args...; kw...) = Axis(:z, args...; kw...)
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# -------------------------------------------------------------------------
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function Axis(sp::Subplot, letter::Symbol, args...; kw...)
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# init with values from _plot_defaults
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d = KW(
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:letter => letter,
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# :extrema => (Inf, -Inf),
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:extrema => Extrema(),
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:discrete_map => Dict(), # map discrete values to discrete indices
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:continuous_values => zeros(0),
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:use_minor => false,
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:show => true, # show or hide the axis? (useful for linked subplots)
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)
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# get defaults from letter version, unless match
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for (k,v) in _axis_defaults
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lk = Symbol(letter, k)
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lv = _axis_defaults_byletter[lk]
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d[k] = (lv == :match ? v : lv)
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end
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# merge!(d, _axis_defaults)
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d[:discrete_values] = []
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# update the defaults
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attr!(Axis([sp], d), args...; kw...)
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end
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function get_axis(sp::Subplot, letter::Symbol)
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axissym = Symbol(letter, :axis)
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if haskey(sp.attr, axissym)
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sp.attr[axissym]
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else
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sp.attr[axissym] = Axis(sp, letter)
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end::Axis
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end
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function process_axis_arg!(d::KW, arg, letter = "")
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T = typeof(arg)
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arg = get(_scaleAliases, arg, arg)
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if typeof(arg) <: Font
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d[Symbol(letter,:tickfont)] = arg
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d[Symbol(letter,:guidefont)] = arg
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elseif arg in _allScales
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d[Symbol(letter,:scale)] = arg
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elseif arg in (:flip, :invert, :inverted)
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d[Symbol(letter,:flip)] = true
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elseif T <: AbstractString
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d[Symbol(letter,:guide)] = arg
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# xlims/ylims
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elseif (T <: Tuple || T <: AVec) && length(arg) == 2
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sym = typeof(arg[1]) <: Number ? :lims : :ticks
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d[Symbol(letter,sym)] = arg
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# xticks/yticks
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elseif T <: AVec
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d[Symbol(letter,:ticks)] = arg
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elseif arg == nothing
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d[Symbol(letter,:ticks)] = []
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elseif T <: Bool || arg in _allShowaxisArgs
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d[Symbol(letter,:showaxis)] = showaxis(arg, letter)
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elseif typeof(arg) <: Number
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d[Symbol(letter,:rotation)] = arg
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elseif typeof(arg) <: Function
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d[Symbol(letter,:formatter)] = arg
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elseif !handleColors!(d, arg, Symbol(letter, :foreground_color_axis))
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warn("Skipped $(letter)axis arg $arg")
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end
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end
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# update an Axis object with magic args and keywords
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function attr!(axis::Axis, args...; kw...)
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# first process args
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d = axis.d
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for arg in args
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process_axis_arg!(d, arg)
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end
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# then override for any keywords... only those keywords that already exists in d
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for (k,v) in kw
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if haskey(d, k)
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if k == :discrete_values
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# add these discrete values to the axis
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for vi in v
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discrete_value!(axis, vi)
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end
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else
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d[k] = v
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end
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end
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end
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# replace scale aliases
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if haskey(_scaleAliases, d[:scale])
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d[:scale] = _scaleAliases[d[:scale]]
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end
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axis
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end
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# -------------------------------------------------------------------------
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Base.show(io::IO, axis::Axis) = dumpdict(axis.d, "Axis", true)
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# Base.getindex(axis::Axis, k::Symbol) = getindex(axis.d, k)
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Base.setindex!(axis::Axis, v, ks::Symbol...) = setindex!(axis.d, v, ks...)
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Base.haskey(axis::Axis, k::Symbol) = haskey(axis.d, k)
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ignorenan_extrema(axis::Axis) = (ex = axis[:extrema]; (ex.emin, ex.emax))
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const _scale_funcs = Dict{Symbol,Function}(
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:log10 => log10,
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:log2 => log2,
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:ln => log,
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)
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const _inv_scale_funcs = Dict{Symbol,Function}(
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:log10 => exp10,
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:log2 => exp2,
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:ln => exp,
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)
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# const _label_func = Dict{Symbol,Function}(
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# :log10 => x -> "10^$x",
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# :log2 => x -> "2^$x",
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# :ln => x -> "e^$x",
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# )
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const _label_func = Dict{Symbol,Function}(
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:log10 => x -> "10^$x",
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:log2 => x -> "2^$x",
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:ln => x -> "e^$x",
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)
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scalefunc(scale::Symbol) = x -> get(_scale_funcs, scale, identity)(Float64(x))
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invscalefunc(scale::Symbol) = x -> get(_inv_scale_funcs, scale, identity)(Float64(x))
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labelfunc(scale::Symbol, backend::AbstractBackend) = get(_label_func, scale, string)
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function optimal_ticks_and_labels(axis::Axis, ticks = nothing)
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amin,amax = axis_limits(axis)
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# scale the limits
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scale = axis[:scale]
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sf = scalefunc(scale)
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# If the axis input was a Date or DateTime use a special logic to find
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# "round" Date(Time)s as ticks
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# This bypasses the rest of optimal_ticks_and_labels, because
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# optimize_datetime_ticks returns ticks AND labels: the label format (Date
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# or DateTime) is chosen based on the time span between amin and amax
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# rather than on the input format
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# TODO: maybe: non-trivial scale (:ln, :log2, :log10) for date/datetime
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if ticks == nothing && scale == :identity
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if axis[:formatter] == dateformatter
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# optimize_datetime_ticks returns ticks and labels(!) based on
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# integers/floats corresponding to the DateTime type. Thus, the axes
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# limits, which resulted from converting the Date type to integers,
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# are converted to 'DateTime integers' (actually floats) before
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# being passed to optimize_datetime_ticks.
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# (convert(Int, convert(DateTime, convert(Date, i))) == 87600000*i)
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ticks, labels = optimize_datetime_ticks(864e5 * amin, 864e5 * amax;
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k_min = 2, k_max = 4)
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# Now the ticks are converted back to floats corresponding to Dates.
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return ticks / 864e5, labels
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elseif axis[:formatter] == datetimeformatter
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return optimize_datetime_ticks(amin, amax; k_min = 2, k_max = 4)
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end
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end
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# get a list of well-laid-out ticks
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if ticks == nothing
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scaled_ticks = optimize_ticks(
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sf(amin),
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sf(amax);
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k_min = 4, # minimum number of ticks
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k_max = 8, # maximum number of ticks
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)[1]
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elseif typeof(ticks) <: Int
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scaled_ticks, viewmin, viewmax = optimize_ticks(
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sf(amin),
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sf(amax);
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k_min = ticks, # minimum number of ticks
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k_max = ticks, # maximum number of ticks
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k_ideal = ticks,
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# `strict_span = false` rewards cases where the span of the
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# chosen ticks is not too much bigger than amin - amax:
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strict_span = false,
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)
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axis[:lims] = map(invscalefunc(scale), (viewmin, viewmax))
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else
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scaled_ticks = map(sf, (filter(t -> amin <= t <= amax, ticks)))
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end
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unscaled_ticks = map(invscalefunc(scale), scaled_ticks)
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labels = if any(isfinite, unscaled_ticks)
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formatter = axis[:formatter]
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if formatter == :auto
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# the default behavior is to make strings of the scaled values and then apply the labelfunc
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map(labelfunc(scale, backend()), Showoff.showoff(scaled_ticks, :plain))
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elseif formatter == :scientific
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Showoff.showoff(unscaled_ticks, :scientific)
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else
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# there was an override for the formatter... use that on the unscaled ticks
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map(formatter, unscaled_ticks)
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end
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else
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# no finite ticks to show...
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String[]
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end
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# @show unscaled_ticks labels
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# labels = Showoff.showoff(unscaled_ticks, scale == :log10 ? :scientific : :auto)
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unscaled_ticks, labels
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end
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# return (continuous_values, discrete_values) for the ticks on this axis
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function get_ticks(axis::Axis)
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ticks = _transform_ticks(axis[:ticks])
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ticks in (nothing, false) && return nothing
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# treat :native ticks as :auto
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ticks = ticks == :native ? :auto : ticks
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dvals = axis[:discrete_values]
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cv, dv = if !isempty(dvals)
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# discrete ticks...
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n = length(dvals)
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rng = if ticks == :auto
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Int[round(Int,i) for i in linspace(1, n, 15)]
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elseif ticks == :all
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1:n
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elseif typeof(ticks) <: Int
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Int[round(Int,i) for i in linspace(1, n, ticks)]
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end
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axis[:continuous_values][rng], dvals[rng]
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elseif typeof(ticks) <: Symbol
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if ispolar(axis.sps[1]) && axis[:letter] == :x
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#force theta axis to be full circle
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(collect(0:pi/4:7pi/4), string.(0:45:315))
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else
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# compute optimal ticks and labels
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optimal_ticks_and_labels(axis)
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end
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elseif typeof(ticks) <: Union{AVec, Int}
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# override ticks, but get the labels
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optimal_ticks_and_labels(axis, ticks)
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elseif typeof(ticks) <: NTuple{2, Any}
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# assuming we're passed (ticks, labels)
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ticks
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else
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error("Unknown ticks type in get_ticks: $(typeof(ticks))")
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end
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# @show ticks dvals cv dv
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return cv, dv
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end
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_transform_ticks(ticks) = ticks
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_transform_ticks(ticks::AbstractArray{T}) where T <: Dates.TimeType = Dates.value.(ticks)
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_transform_ticks(ticks::NTuple{2, Any}) = (_transform_ticks(ticks[1]), ticks[2])
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# -------------------------------------------------------------------------
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function reset_extrema!(sp::Subplot)
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for asym in (:x,:y,:z)
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sp[Symbol(asym,:axis)][:extrema] = Extrema()
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end
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for series in sp.series_list
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expand_extrema!(sp, series.d)
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end
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end
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function expand_extrema!(ex::Extrema, v::Number)
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ex.emin = isfinite(v) ? min(v, ex.emin) : ex.emin
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ex.emax = isfinite(v) ? max(v, ex.emax) : ex.emax
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ex
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end
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function expand_extrema!(axis::Axis, v::Number)
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expand_extrema!(axis[:extrema], v)
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end
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# these shouldn't impact the extrema
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expand_extrema!(axis::Axis, ::Void) = axis[:extrema]
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expand_extrema!(axis::Axis, ::Bool) = axis[:extrema]
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function expand_extrema!(axis::Axis, v::Tuple{MIN,MAX}) where {MIN<:Number,MAX<:Number}
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ex = axis[:extrema]
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ex.emin = isfinite(v[1]) ? min(v[1], ex.emin) : ex.emin
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ex.emax = isfinite(v[2]) ? max(v[2], ex.emax) : ex.emax
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ex
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end
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function expand_extrema!(axis::Axis, v::AVec{N}) where N<:Number
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ex = axis[:extrema]
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for vi in v
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expand_extrema!(ex, vi)
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end
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ex
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end
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function expand_extrema!(sp::Subplot, d::KW)
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vert = isvertical(d)
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# first expand for the data
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for letter in (:x, :y, :z)
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data = d[if vert
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letter
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else
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letter == :x ? :y : letter == :y ? :x : :z
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end]
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if letter != :z && d[:seriestype] == :straightline && any(series[:seriestype] != :straightline for series in series_list(sp)) && data[1] != data[2]
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data = [NaN]
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end
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axis = sp[Symbol(letter, "axis")]
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if isa(data, Volume)
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expand_extrema!(sp[:xaxis], data.x_extents)
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expand_extrema!(sp[:yaxis], data.y_extents)
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expand_extrema!(sp[:zaxis], data.z_extents)
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elseif eltype(data) <: Number || (isa(data, Surface) && all(di -> isa(di, Number), data.surf))
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if !(eltype(data) <: Number)
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# huh... must have been a mis-typed surface? lets swap it out
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data = d[letter] = Surface(Matrix{Float64}(data.surf))
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end
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expand_extrema!(axis, data)
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elseif data != nothing
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# TODO: need more here... gotta track the discrete reference value
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# as well as any coord offset (think of boxplot shape coords... they all
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# correspond to the same x-value)
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d[letter], d[Symbol(letter,"_discrete_indices")] = discrete_value!(axis, data)
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expand_extrema!(axis, d[letter])
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end
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end
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# # expand for fillrange/bar_width
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# fillaxis, baraxis = sp.attr[:yaxis], sp.attr[:xaxis]
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# if isvertical(d)
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# fillaxis, baraxis = baraxis, fillaxis
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# end
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# expand for fillrange
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fr = d[:fillrange]
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if fr == nothing && d[:seriestype] == :bar
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fr = 0.0
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end
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if fr != nothing && !all3D(d)
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axis = sp.attr[vert ? :yaxis : :xaxis]
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if typeof(fr) <: Tuple
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for fri in fr
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expand_extrema!(axis, fri)
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end
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else
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expand_extrema!(axis, fr)
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end
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end
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# expand for bar_width
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if d[:seriestype] == :bar
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dsym = vert ? :x : :y
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data = d[dsym]
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bw = d[:bar_width]
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if bw == nothing
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bw = d[:bar_width] = _bar_width * ignorenan_minimum(filter(x->x>0,diff(sort(data))))
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end
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axis = sp.attr[Symbol(dsym, :axis)]
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expand_extrema!(axis, ignorenan_maximum(data) + 0.5maximum(bw))
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expand_extrema!(axis, ignorenan_minimum(data) - 0.5minimum(bw))
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end
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# expand for heatmaps
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if d[:seriestype] == :heatmap
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for letter in (:x, :y)
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data = d[letter]
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axis = sp[Symbol(letter, "axis")]
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scale = get(d, Symbol(letter, "scale"), :identity)
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expand_extrema!(axis, heatmap_edges(data, scale))
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end
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end
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end
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function expand_extrema!(sp::Subplot, xmin, xmax, ymin, ymax)
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expand_extrema!(sp[:xaxis], (xmin, xmax))
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expand_extrema!(sp[:yaxis], (ymin, ymax))
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end
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# -------------------------------------------------------------------------
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# push the limits out slightly
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function widen(lmin, lmax)
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span = lmax - lmin
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# eps = NaNMath.max(1e-16, min(1e-2span, 1e-10))
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eps = NaNMath.max(1e-16, 0.03span)
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lmin-eps, lmax+eps
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end
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# figure out if widening is a good idea. if there's a scale set it's too tricky,
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# so lazy out and don't widen
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function default_should_widen(axis::Axis)
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should_widen = false
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if axis[:scale] == :identity && !is_2tuple(axis[:lims])
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for sp in axis.sps
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for series in series_list(sp)
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if series.d[:seriestype] in (:scatter,) || series.d[:markershape] != :none
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should_widen = true
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end
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end
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end
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end
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should_widen
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end
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# using the axis extrema and limit overrides, return the min/max value for this axis
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function axis_limits(axis::Axis, should_widen::Bool = default_should_widen(axis))
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ex = axis[:extrema]
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amin, amax = ex.emin, ex.emax
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lims = axis[:lims]
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if (isa(lims, Tuple) || isa(lims, AVec)) && length(lims) == 2
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if isfinite(lims[1])
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amin = lims[1]
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end
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if isfinite(lims[2])
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amax = lims[2]
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end
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end
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if amax <= amin && isfinite(amin)
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amax = amin + 1.0
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end
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if !isfinite(amin) && !isfinite(amax)
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amin, amax = 0.0, 1.0
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end
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if ispolar(axis.sps[1])
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if axis[:letter] == :x
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amin, amax = 0, 2pi
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elseif lims == :auto
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#widen max radius so ticks dont overlap with theta axis
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amin, amax + 0.1 * abs(amax - amin)
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else
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amin, amax
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end
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elseif should_widen
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widen(amin, amax)
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else
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amin, amax
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end
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end
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# -------------------------------------------------------------------------
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# these methods track the discrete (categorical) values which correspond to axis continuous values (cv)
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# whenever we have discrete values, we automatically set the ticks to match.
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# we return (continuous_value, discrete_index)
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function discrete_value!(axis::Axis, dv)
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cv_idx = get(axis[:discrete_map], dv, -1)
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# @show axis[:discrete_map], axis[:discrete_values], dv
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if cv_idx == -1
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ex = axis[:extrema]
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cv = NaNMath.max(0.5, ex.emax + 1.0)
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expand_extrema!(axis, cv)
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push!(axis[:discrete_values], dv)
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push!(axis[:continuous_values], cv)
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cv_idx = length(axis[:discrete_values])
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axis[:discrete_map][dv] = cv_idx
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cv, cv_idx
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else
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cv = axis[:continuous_values][cv_idx]
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cv, cv_idx
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end
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end
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# continuous value... just pass back with axis negative index
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function discrete_value!(axis::Axis, cv::Number)
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cv, -1
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end
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# add the discrete value for each item. return the continuous values and the indices
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function discrete_value!(axis::Axis, v::AVec)
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n = length(v)
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cvec = zeros(n)
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discrete_indices = zeros(Int, n)
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for i=1:n
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cvec[i], discrete_indices[i] = discrete_value!(axis, v[i])
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end
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cvec, discrete_indices
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end
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# add the discrete value for each item. return the continuous values and the indices
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function discrete_value!(axis::Axis, v::AMat)
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n,m = size(v)
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cmat = zeros(n,m)
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discrete_indices = zeros(Int, n, m)
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for i=1:n, j=1:m
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cmat[i,j], discrete_indices[i,j] = discrete_value!(axis, v[i,j])
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end
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cmat, discrete_indices
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end
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function discrete_value!(axis::Axis, v::Surface)
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map(Surface, discrete_value!(axis, v.surf))
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end
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# -------------------------------------------------------------------------
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function pie_labels(sp::Subplot, series::Series)
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d = series.d
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if haskey(d,:x_discrete_indices)
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dvals = sp.attr[:xaxis].d[:discrete_values]
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[dvals[idx] for idx in d[:x_discrete_indices]]
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else
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d[:x]
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end
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end
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# -------------------------------------------------------------------------
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# compute the line segments which should be drawn for this axis
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function axis_drawing_info(sp::Subplot)
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xaxis, yaxis = sp[:xaxis], sp[:yaxis]
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xmin, xmax = axis_limits(xaxis)
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ymin, ymax = axis_limits(yaxis)
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xticks = get_ticks(xaxis)
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yticks = get_ticks(yaxis)
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xaxis_segs = Segments(2)
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yaxis_segs = Segments(2)
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xtick_segs = Segments(2)
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ytick_segs = Segments(2)
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xgrid_segs = Segments(2)
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ygrid_segs = Segments(2)
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xborder_segs = Segments(2)
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yborder_segs = Segments(2)
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if sp[:framestyle] != :none
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# xaxis
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if xaxis[:showaxis]
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if sp[:framestyle] != :grid
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y1, y2 = if sp[:framestyle] in (:origin, :zerolines)
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0.0, 0.0
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else
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xor(xaxis[:mirror], yaxis[:flip]) ? (ymax, ymin) : (ymin, ymax)
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end
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push!(xaxis_segs, (xmin, y1), (xmax, y1))
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# don't show the 0 tick label for the origin framestyle
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if sp[:framestyle] == :origin && !(xticks in (nothing,false)) && length(xticks) > 1
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showticks = xticks[1] .!= 0
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xticks = (xticks[1][showticks], xticks[2][showticks])
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end
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end
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sp[:framestyle] in (:semi, :box) && push!(xborder_segs, (xmin, y2), (xmax, y2)) # top spine
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end
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if !(xaxis[:ticks] in (nothing, false))
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f = scalefunc(yaxis[:scale])
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invf = invscalefunc(yaxis[:scale])
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ticks_in = xaxis[:tick_direction] == :out ? -1 : 1
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t1 = invf(f(ymin) + 0.015 * (f(ymax) - f(ymin)) * ticks_in)
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t2 = invf(f(ymax) - 0.015 * (f(ymax) - f(ymin)) * ticks_in)
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t3 = invf(f(0) + 0.015 * (f(ymax) - f(ymin)) * ticks_in)
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|
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for xtick in xticks[1]
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if xaxis[:showaxis]
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tick_start, tick_stop = if sp[:framestyle] == :origin
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(0, t3)
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else
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xor(xaxis[:mirror], yaxis[:flip]) ? (ymax, t2) : (ymin, t1)
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end
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push!(xtick_segs, (xtick, tick_start), (xtick, tick_stop)) # bottom tick
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|
end
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# sp[:draw_axes_border] && push!(xaxis_segs, (xtick, ymax), (xtick, t2)) # top tick
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xaxis[:grid] && push!(xgrid_segs, (xtick, ymin), (xtick, ymax)) # vertical grid
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|
end
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|
end
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|
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# yaxis
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if yaxis[:showaxis]
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|
if sp[:framestyle] != :grid
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|
x1, x2 = if sp[:framestyle] in (:origin, :zerolines)
|
|
0.0, 0.0
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|
else
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|
xor(yaxis[:mirror], xaxis[:flip]) ? (xmax, xmin) : (xmin, xmax)
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|
end
|
|
push!(yaxis_segs, (x1, ymin), (x1, ymax))
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|
# don't show the 0 tick label for the origin framestyle
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|
if sp[:framestyle] == :origin && !(yticks in (nothing,false)) && length(yticks) > 1
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|
showticks = yticks[1] .!= 0
|
|
yticks = (yticks[1][showticks], yticks[2][showticks])
|
|
end
|
|
end
|
|
sp[:framestyle] in (:semi, :box) && push!(yborder_segs, (x2, ymin), (x2, ymax)) # right spine
|
|
end
|
|
if !(yaxis[:ticks] in (nothing, false))
|
|
f = scalefunc(xaxis[:scale])
|
|
invf = invscalefunc(xaxis[:scale])
|
|
ticks_in = yaxis[:tick_direction] == :out ? -1 : 1
|
|
t1 = invf(f(xmin) + 0.015 * (f(xmax) - f(xmin)) * ticks_in)
|
|
t2 = invf(f(xmax) - 0.015 * (f(xmax) - f(xmin)) * ticks_in)
|
|
t3 = invf(f(0) + 0.015 * (f(xmax) - f(xmin)) * ticks_in)
|
|
|
|
for ytick in yticks[1]
|
|
if yaxis[:showaxis]
|
|
tick_start, tick_stop = if sp[:framestyle] == :origin
|
|
(0, t3)
|
|
else
|
|
xor(yaxis[:mirror], xaxis[:flip]) ? (xmax, t2) : (xmin, t1)
|
|
end
|
|
push!(ytick_segs, (tick_start, ytick), (tick_stop, ytick)) # left tick
|
|
end
|
|
# sp[:draw_axes_border] && push!(yaxis_segs, (xmax, ytick), (t2, ytick)) # right tick
|
|
yaxis[:grid] && push!(ygrid_segs, (xmin, ytick), (xmax, ytick)) # horizontal grid
|
|
end
|
|
end
|
|
end
|
|
|
|
xticks, yticks, xaxis_segs, yaxis_segs, xtick_segs, ytick_segs, xgrid_segs, ygrid_segs, xborder_segs, yborder_segs
|
|
end
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