Use ranged callback values for sliders #190

Job	Run time
initial_checks / Load tox environments	4s
initial_checks / codestyle (ubuntu-latest)	49s
deploy-examples	0s
tests / Load tox environments	5s
tests / py39-test-all (ubuntu-latest)	5m 24s
tests / py310-test-all (ubuntu-latest)	3m 48s
tests / py311-test-all (ubuntu-latest)	3m 48s
tests / py312-test-all (ubuntu-latest)	3m 52s
tests / py312-test-qt (ubuntu-latest)	3m 25s
tests / py312-test-jupyter (ubuntu-latest)	3m 24s
tests / py39-test-all (macos-12)	9m 22s
tests / py310-test-all (macos-latest)	5m 39s
tests / py311-test-all (macos-latest)	7m 31s
tests / py312-test-all (macos-latest)	5m 44s
tests / py312-test-qt (macos-latest)	5m 17s
tests / py39-test-all (windows-latest)	7m 19s
tests / py310-test-all (windows-latest)	5m 55s
tests / py311-test-all (windows-latest)	5m 59s
tests / py312-test-all (windows-latest)	7m 30s
tests / py312-test-qt (windows-latest)	5m 20s
tests / py312-test-jupyter (windows-latest)	6m 21s
	1h 36m 36s

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