StyleContext.addRegion

Adds a region to @context, so posterior calls to gtk_style_context_get() or any of the gtk_render_*() functions will make use of this new region for styling.

In the CSS file format, a #GtkTreeView defining a “row” region, would be matched by:

|[ <!-- language="CSS" --> treeview row { ... } ]|

Pseudo-classes are used for matching @flags, so the two following rules: |[ <!-- language="CSS" --> treeview row:nth-child(even) { ... } treeview row:nth-child(odd) { ... } ]|

would apply to even and odd rows, respectively.

Region names must only contain lowercase letters and “-”, starting always with a lowercase letter.

class StyleContext
void
addRegion

Parameters

regionName string

region name to use in styling

flags GtkRegionFlags

flags that apply to the region

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