Emptying figures in makie

General Usage
1

I have created a figure in GLMakie with an image and an IntervalSlider to adjust contrast. This works fine. If I empty the figure with empty!(fig) and then recreate the image plot object and the IntervalSlider plot object the latter does not work. Any insights as to why this is happening.

2

Do you have a short example which code fails for you and what the error is?

3

To keep things simple, look at the code example in the Makie documentation for IntervalSlider

using GLMakie #changed from CairoMakie

f = Figure()

#empty!(f)

Axis(f[1, 1], limits = (0, 1, 0, 1))

rs_h = IntervalSlider(f[2, 1], range = LinRange(0, 1, 1000),

startvalues = (0.2, 0.8))

rs_v = IntervalSlider(f[1, 2], range = LinRange(0, 1, 1000),

startvalues = (0.4, 0.9), horizontal = false)

labeltext1 = lift(rs_h.interval) do int

string(round.(int, digits = 2))

end

Label(f[3, 1], labeltext1, tellwidth = false)

labeltext2 = lift(rs_v.interval) do int

string(round.(int, digits = 2))

end

Label(f[1, 3], labeltext2,

tellheight = false, rotation = pi/2)

points = rand(Point2f, 300)

color points differently if they are within the two intervals

colors = lift(rs_h.interval, rs_v.interval) do h_int, v_int

map(points) do p

(h_int[1] < p[1] < h_int[2]) && (v_int[1] < p[2] < v_int[2])

end

end

scatter!(points, color = colors, colormap = [:gray90, :dodgerblue], strokewidth = 0)

f

I have added , but commented out, #empty!(f)

If I run this script (using include in REPL) the results appear in a window. The Sliders work as they should. If I run the script a second time it also works ok.

If I now comment out the fig = Figure() line and uncomment the empty!(f) line

using GLMakie

#f = Figure()

empty!(f)

Axis(f[1, 1], limits = (0, 1, 0, 1))

.

same code as above

.

f

the window appears as before but the Sliders don’t work. They look the same as before but cannot be activated.

I am relatively new to Makie and cannot see what I need to fix this.

Any ideas?

Thanks

4

Sorry, I should say that I am running 1.10.4

5

Please use triple backticks to quote your code.

```
# Your code
```
6

To keep things simple, look at the code example in the Makie documentation for IntervalSlider


using GLMakie #changed from CairoMakie

f = Figure()

#empty!(f)

Axis(f[1, 1], limits = (0, 1, 0, 1))

rs_h = IntervalSlider(f[2, 1], range = LinRange(0, 1, 1000),

startvalues = (0.2, 0.8))

rs_v = IntervalSlider(f[1, 2], range = LinRange(0, 1, 1000),

startvalues = (0.4, 0.9), horizontal = false)

labeltext1 = lift(rs_h.interval) do int

string(round.(int, digits = 2))

end

Label(f[3, 1], labeltext1, tellwidth = false)

labeltext2 = lift(rs_v.interval) do int

string(round.(int, digits = 2))

end

Label(f[1, 3], labeltext2,

tellheight = false, rotation = pi/2)

points = rand(Point2f, 300)

# color points differently if they are within the two intervals

colors = lift(rs_h.interval, rs_v.interval) do h_int, v_int

map(points) do p

(h_int[1] < p[1] < h_int[2]) && (v_int[1] < p[2] < v_int[2])

end

end

scatter!(points, color = colors, colormap = [:gray90, :dodgerblue], strokewidth = 0)

f

I have added , but commented out, #empty!(f)

If I run this script (using include in REPL) the results appear in a window. The Sliders work as they should. If I run the script a second time it also works ok.

If I now comment out the f = Figure() line and uncomment the empty!(f) line


using GLMakie

#f = Figure()

empty!(f)

Axis(f[1, 1], limits = (0, 1, 0, 1))

.

# same code as above

.

f

the window appears as before but the Sliders don’t work. They look the same as before but cannot be activated.

I am using Julia 1.10.4

I am relatively new to Makie and cannot see what I need to fix this.

Any ideas?

Thanks