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docs: Mention DND in the migration guide

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Matthias Clasen 2020-01-01 12:55:21 -05:00
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docs/reference/gtk/migrating-3to4.xml
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@ -903,6 +903,22 @@
gtk_tooltip_set_custom().
</para>
</section>
<section>
<title>Switch to the new DND api</title>
<para>
The source-side DND apis in GTK 4 have been changed to use a separate object, #GtkDragSource.
</para>
<para>
Instead of calling gtk_drag_source_set() and connecting to #GtkWidget signals, you create
a #GtkDragSource object, attach it to the widget with gtk_drag_source_attach(), and connect
to #GtkDragSource signals. The signals themselves are fairly similar.
</para>
<para>
Instead of calling gtk_drag_begin() on a widget, use a #GtkDragSource object and call
gtk_drag_source_drag_begin().
</para>
</section>
</section>
</chapter>