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Merge branch 'clarify-scrollable-docs' into 'main'

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scrollable: Clarify when to set adjustment props

See merge request GNOME/gtk!4632
This commit is contained in:
Benjamin Otte 2022-04-12 23:48:55 +00:00
commit a2599c2bb9
1 changed files with 7 additions and 8 deletions
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15
gtk/gtkscrollable.c
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@ -29,13 +29,11 @@
* All scrollable widgets should do the following.
*
* - When a parent widget sets the scrollable child widget’s adjustments,
* the widget should populate the adjustments’
* [property@Gtk.Adjustment:lower],
* [property@Gtk.Adjustment:upper],
* [property@Gtk.Adjustment:step-increment],
* [property@Gtk.Adjustment:page-increment] and
* [property@Gtk.Adjustment:page-size] properties and connect to the
* [signal@Gtk.Adjustment::value-changed] signal.
* the widget should connect to the [signal@Gtk.Adjustment::value-changed]
* signal. The child widget should then populate the adjustments’ properties
* as soon as possible, which usually means queueing an allocation right away
* and populating the properties in the [vfunc@Gtk.Widget.size_allocate]
* implementation.
*
* - Because its preferred size is the size for a fully expanded widget,
* the scrollable widget must be able to cope with underallocations.
@ -43,7 +41,8 @@
* [vfunc@Gtk.Widget.size_allocate] implementation.
*
* - When the parent allocates space to the scrollable child widget,
* the widget should update the adjustments’ properties with new values.
* the widget must ensure the adjustments’ property values are correct and up
* to date, for example using [method@Gtk.Adjustment.configure].
*
* - When any of the adjustments emits the [signal@Gtk.Adjustment::value-changed]
* signal, the scrollable widget should scroll its contents.