Add option strip_zero for MultiplesTicks

CHANGELOG.md

@@ -9,6 +9,7 @@
 
 - Fix NaN handling in WGLMakie [#4282](https://github.com/MakieOrg/Makie.jl/pull/4282).
 - Show DataInspector tooltip on NaN values if `nan_color` has been set to other than `:transparent` [#4310](https://github.com/MakieOrg/Makie.jl/pull/4310)
+- `MultiplesTicks` accepts new option `strip_zero=true`, allowing labels of the form `0x` to be `0` [#4372](https://github.com/MakieOrg/Makie.jl/pull/4372)
 - Fix `linestyle` not being used in `triplot` [#4332](https://github.com/MakieOrg/Makie.jl/pull/4332)
 - Fix voxel clipping not being based on voxel centers [#4397](https://github.com/MakieOrg/Makie.jl/pull/4397)
 - Parsing `Q` and `q` commands in svg paths with `BezierPath` is now supported [#4413](https://github.com/MakieOrg/Makie.jl/pull/4413)

src/makielayout/lineaxis.jl

@@ -667,7 +667,13 @@
     dvmax = vmax / m.multiple
     multiples = Makie.get_tickvalues(LinearTicks(m.n_ideal), dvmin, dvmax)
 
-    multiples .* m.multiple, showoff_minus(multiples) .* m.suffix
+    locs = multiples .* m.multiple
+    labs = showoff_minus(multiples) .* m.suffix
+    if m.strip_zero
+        labs = map( ((x, lab),) -> x != 0 ? lab : "0", zip(multiples, labs))
+    end
+
+    return locs, labs
 end
 
 function get_ticks(m::AngularTicks, any_scale, ::Automatic, vmin, vmax)

src/makielayout/types.jl

@@ -66,13 +66,20 @@
 ```
 MultiplesTicks(5, pi, "π")
 ```
+
+If `strip_zero == true`, then the resulting labels
+will be checked and any label that is a multiple of 0
+will be set to "0".
 """
 struct MultiplesTicks
     n_ideal::Int
     multiple::Float64
     suffix::String
+    strip_zero::Bool
 end
 
+MultiplesTicks(n_ideal, multiple, suffix; strip_zero = false) = MultiplesTicks(n_ideal, multiple, suffix, strip_zero)
+
 """
     AngularTicks(label_factor, suffix[, n_ideal::Vector{Vec2f}])
 

test/makielayout.jl

@@ -212,6 +212,18 @@ end
     end
 end
 
+@testset "MultiplesTicks strip_zero" begin
+    default = MultiplesTicks(5, pi, "π")
+    strip = MultiplesTicks(5, pi, "π"; strip_zero=true)
+    no_strip = MultiplesTicks(5, pi, "π"; strip_zero=false)
+
+    @test default == no_strip
+    zero_default = Makie.get_ticks(default, nothing, Makie.Automatic(), -7, 7)[2][3]
+    @test zero_default == "0π"
+    zero_stripped = Makie.get_ticks(strip, nothing, Makie.Automatic(), -7, 7)[2][3]
+    @test zero_stripped == "0"
+end
+
 @testset "Colorbars" begin
     fig = Figure()
     hmap = heatmap!(Axis(fig[1, 1]), rand(4, 4))