Use ranged callback values for sliders #187

Job	Run time
initial_checks / Load tox environments	5s
initial_checks / codestyle (ubuntu-latest)	32s
deploy-examples	0s
tests / Load tox environments	5s
tests / py39-test-all (ubuntu-latest)	4m 3s
tests / py310-test-all (ubuntu-latest)	3m 46s
tests / py311-test-all (ubuntu-latest)	3m 37s
tests / py312-test-all (ubuntu-latest)	3m 44s
tests / py312-test-qt (ubuntu-latest)	3m 47s
tests / py312-test-jupyter (ubuntu-latest)	3m 12s
tests / py39-test-all (macos-12)	10m 33s
tests / py310-test-all (macos-latest)	5m 34s
tests / py311-test-all (macos-latest)	8m 11s
tests / py312-test-all (macos-latest)	6m 41s
tests / py312-test-qt (macos-latest)	5m 48s
tests / py39-test-all (windows-latest)	10m 58s
tests / py310-test-all (windows-latest)	7m 6s
tests / py311-test-all (windows-latest)	6m 58s
tests / py312-test-all (windows-latest)	7m 37s
tests / py312-test-qt (windows-latest)	6m 10s
tests / py312-test-jupyter (windows-latest)	5m 26s
	1h 43m 53s

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