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gtkeventcontrollerscroll: Add scroll unit getter

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The scroll unit is accessible through
gtk_event_controller_scroll_get_unit() after the
"scroll" signal reception.
This commit is contained in:
panoplie 2022-02-21 16:23:24 +01:00
parent fb4927827b
commit 3ab63fd03b
2 changed files with 30 additions and 0 deletions
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27
gtk/gtkeventcontrollerscroll.c
View File

@ -85,6 +85,8 @@ struct _GtkEventControllerScroll
double cur_dx;
double cur_dy;
GdkScrollUnit cur_unit;
guint hold_timeout_id;
guint active : 1;
};
@ -365,6 +367,8 @@ gtk_event_controller_scroll_handle_event (GtkEventController *controller,
g_clear_handle_id (&scroll->hold_timeout_id, g_source_remove);
scroll->cur_unit = gdk_scroll_event_get_unit (event);
/* FIXME: Handle device changes */
direction = gdk_scroll_event_get_direction (event);
if (direction == GDK_SCROLL_SMOOTH)
@ -497,6 +501,9 @@ gtk_event_controller_scroll_class_init (GtkEventControllerScrollClass *klass)
* Signals that the widget should scroll by the
* amount specified by @dx and @dy.
*
* For the representation unit of the deltas, see
* [method@Gtk.EventControllerScroll.get_unit].
*
* Returns: %TRUE if the scroll event was handled,
* %FALSE otherwise.
*/
@ -614,3 +621,23 @@ gtk_event_controller_scroll_get_flags (GtkEventControllerScroll *scroll)
return scroll->flags;
}
/**
* gtk_event_controller_scroll_get_unit:
* @scroll: a `GtkEventControllerScroll`.
*
* Gets the scroll unit of the last
* [signal@Gtk.EventControllerScroll::scroll] signal received.
*
* Returns: the scroll unit.
*
* Since: 4.8
*/
GdkScrollUnit
gtk_event_controller_scroll_get_unit (GtkEventControllerScroll *scroll)
{
g_return_val_if_fail (GTK_IS_EVENT_CONTROLLER_SCROLL (scroll),
GDK_SCROLL_UNIT_WHEEL);
return scroll->cur_unit;
}

3
gtk/gtkeventcontrollerscroll.h
View File

@ -71,6 +71,9 @@ GDK_AVAILABLE_IN_ALL
GtkEventControllerScrollFlags
gtk_event_controller_scroll_get_flags (GtkEventControllerScroll *scroll);
GDK_AVAILABLE_IN_4_8
GdkScrollUnit gtk_event_controller_scroll_get_unit (GtkEventControllerScroll *scroll);
G_END_DECLS
#endif /* __GTK_EVENT_CONTROLLER_SCROLL_H__ */