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https://github.com/Jermolene/TiddlyWiki5
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37 lines
1.7 KiB
Plaintext
37 lines
1.7 KiB
Plaintext
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created: 20211206114114698
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modified: 20211206165150302
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tags: Learning Cascades [[Customise TiddlyWiki]]
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title: How to create a custom tiddler colour rule
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type: text/vnd.tiddlywiki
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Here we show how to add a rule to the [[Tiddler Colour Cascade]] that causes tiddlers with the tag <<tag "TableOfContents">> to be given a bright blue colour and tiddlers with the tag <<tag "Working with TiddlyWiki">> to be given a dark purple colour.
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<<.tip "[[How to create a custom tiddler icon rule]] describes how the same tiddlers have been given a custom icon">>
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First, we add a new step to the tiddler colour cascade. The new filter step is:
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```
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[tag[TableOfContents]then[#1e90ff]]
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[tag[Working with TiddlyWiki]then[darkorchid]]
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```
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It can be read as:
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```
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If the tiddler has the tag "TableOfContents" then return the colour #1e90ff
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Else if the tiddler has the tag "Working with TiddlyWiki" then return the colour darkorchid
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```
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The tiddler colour cascade is defined by the tag <<tag "$:/tags/TiddlerColourFilter">>, so we need to create a configuration tiddler with that tag.
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We also need to make sure that it is inserted at the correct point in the cascade:
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* The new rule must be after the "colour-field" rule to ensure that tiddlers with an explicit ''color'' field will respect the value of that field
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* The new rule must be before the "default" icon otherwise it will never be seen if the default colour is specified
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The control panel "Cascades" tab shows that this can be achieved by inserting the new step immediately before the default step using the `list-before` field.
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The full list of fields in the configuration tiddler is:
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<<.tiddler-fields "$:/_tw5.com/CustomTiddlerColourCascadeDemo">>
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