Refine current rule

[qgib]

Author Name: Barrett Higman (@barretthigman) Original Redmine Issue: 10479

Redmine category:gui Assignee: Nathan Woodrow

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It would be good that when 'Refine current rule' is used that the refinements respect the original rule that they are based on.

For example, for a road dataset, if a rule is used to exclude unsealed roads then a categorised refinement of that rule should not create classifications that include unsealed roads.

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• Adding_ranges_to_rule-based_style_includes_entire_range_instead_of_the_rule_defined.png (Donovan Cameron)

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Related issue(s): #19191 (duplicates) Redmine related issue(s): 10815

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[qgib]

Author Name: Jürgen Fischer (@jef-n)

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• category_id was configured as GUI

[qgib]

Author Name: baditaflorin - (baditaflorin -)

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I had the same poblem and i was able to do this using the CASE conditionals

CASE WHEN "pntcnt" <50 THEN "pntcnt" END

And my rule was to show only pntcnt that are lower then 50

[qgib]

Author Name: baditaflorin - (baditaflorin -)

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But this only work for <

if you try = or > is not working

[qgib]

Author Name: Giovanni Manghi (@gioman)

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ticket #19191 is about a different thing: expression in rule based symbology are written in a wrong way, at least when used to refine rules, see https://github.com/qgis/QGIS/issues/19191#issuecomment-495834072

[qgib]

Author Name: Nyall Dawson (@nyalldawson)

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More detail in #20124

[qgib]

Author Name: Donovan Cameron (@saultdon)

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This would be a great improvement to see! I've attached a screen shot to help illustrate the problem.

Also, if the "Label" that shows up in the layer list was styled with just the ranges. Otherwise it creates a large label. Maybe it could create the label similarly to how it's created when using just the "graduated" style.

Currently (it includes the expression!):

@"column" >= 0 AND "column" <= 1 "column" >= 1 AND "column" <= 4 "column" >= 4 AND "column" <= 8@

or

@(CASE WHEN "unique_value_column" = "value" THEN "column" END) >= 0 AND (CASE WHEN "unique_value_column" = "value" THEN "column" END) <= 1 (CASE WHEN "unique_value_column" = "value" THEN "column" END) >= 1 AND (CASE WHEN "unique_value_column" = "value" THEN "column" END) <= 4 (CASE WHEN "unique_value_column" = "value" THEN "column" END) >= 4 AND (CASE WHEN "unique_value_column" = "value" THEN "column" END) <= 8@

Preferred (in a simplified manner):

@0 - 1 1 - 4 4 - 8@

The preferred type is better for when viewing in the map canvas and trying to create an actual map with a legend.

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• 10502 was configured as Adding_ranges_to_rule-based_style_includes_entire_range_instead_of_the_rule_defined.png

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• Adding_ranges_to_rule-based_style_includes_entire_range_instead_of_the_rule_defined.png (Donovan Cameron)

[qgib]

Author Name: Giovanni Manghi (@gioman)

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• easy_fix was configured as 0