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Mention icon theme in the migration guide

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This was requested in #3216.
This commit is contained in:
Matthias Clasen 2020-09-30 08:49:42 -04:00
parent 9d701129cc
commit 5fa765b284
1 changed files with 12 additions and 0 deletions
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docs/reference/gtk/migrating-3to4.md
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@ -220,6 +220,18 @@ replace many uses of gtk_container_add() with equivalent container-specific
APIs such as gtk_box_pack_start() or gtk_grid_attach(), and thereby reduce
the amount of work you have to do at the time of the switch.
### Review your use of icon resources
When using icons as resources, the behavior of GTK 4 is different in one
respect: Icons that are directly in $APP_ID/icons/ are treated as unthemed
icons, which also means that symbolic icons are not recolored. If you want
your icon resources to have icon theme semantics, they need to be placed
into theme subdirectories such as $APP_ID/icons/16x16/actions or
$APP_ID/icons/scalable/status.
This location works fine in GTK 3 too, so you can prepare for this change
before switching to GTK 4.
## Changes that need to be done at the time of the switch
This section outlines porting tasks that you need to tackle when