Use ranged callback values for sliders #189

Job	Run time
initial_checks / Load tox environments	9s
initial_checks / codestyle (ubuntu-latest)	32s
deploy-examples	0s
tests / Load tox environments	3s
tests / py39-test-all (ubuntu-latest)	4m 33s
tests / py310-test-all (ubuntu-latest)	3m 50s
tests / py311-test-all (ubuntu-latest)	3m 41s
tests / py312-test-all (ubuntu-latest)	3m 45s
tests / py312-test-qt (ubuntu-latest)	4m 19s
tests / py312-test-jupyter (ubuntu-latest)	3m 11s
tests / py39-test-all (macos-12)	9m 29s
tests / py310-test-all (macos-latest)	6m 26s
tests / py311-test-all (macos-latest)	6m 9s
tests / py312-test-all (macos-latest)	6m 58s
tests / py312-test-qt (macos-latest)	5m 17s
tests / py39-test-all (windows-latest)	6m 51s
tests / py310-test-all (windows-latest)	7m 15s
tests / py311-test-all (windows-latest)	5m 57s
tests / py312-test-all (windows-latest)	6m 17s
tests / py312-test-qt (windows-latest)	7m 31s
tests / py312-test-jupyter (windows-latest)	6m 3s
	1h 38m 16s

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