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st: Use StAdjustment's new transition API

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Now that the adjustment itself can be used to track its transitions,
do that for animating the scroll bar handle.

https://gitlab.gnome.org/GNOME/gnome-shell/merge_requests/669
This commit is contained in:
Florian Müllner 2019-08-02 17:04:42 +02:00
parent 9097c5e9c0
commit 72defaa97e
1 changed files with 11 additions and 24 deletions
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35
src/st/st-scroll-bar.c
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@ -66,8 +66,6 @@ struct _StScrollBarPrivate
guint paging_source_id;
guint paging_event_no;
ClutterTransition *paging_animation;
guint vertical : 1;
};
@ -670,18 +668,11 @@ handle_button_press_event_cb (ClutterActor *actor,
return TRUE;
}
static void
animation_completed_cb (ClutterTransition *animation,
gboolean is_finished,
StScrollBarPrivate *priv)
{
g_clear_object (&priv->paging_animation);
}
static gboolean
trough_paging_cb (StScrollBar *self)
{
StScrollBarPrivate *priv = st_scroll_bar_get_instance_private (self);
g_autoptr (ClutterTransition) transition = NULL;
StSettings *settings;
gfloat handle_pos, event_pos, tx, ty;
gdouble value, new_value;
@ -772,26 +763,22 @@ trough_paging_cb (StScrollBar *self)
new_value = value - page_increment;
}
if (priv->paging_animation)
{
clutter_timeline_stop (CLUTTER_TIMELINE (priv->paging_animation));
}
/* Stop existing transition, if one exists */
st_adjustment_remove_transition (priv->adjustment, "value");
settings = st_settings_get ();
g_object_get (settings, "slow-down-factor", &slow_down_factor, NULL);
/* FIXME: Creating a new transition for each scroll is probably not the best
* idea, but it's a lot less involved than extending the current animation */
priv->paging_animation = g_object_new (CLUTTER_TYPE_PROPERTY_TRANSITION,
"animatable", priv->adjustment,
"property-name", "value",
"interval", clutter_interval_new (G_TYPE_DOUBLE, value, new_value),
"duration", (guint)(PAGING_SUBSEQUENT_REPEAT_TIMEOUT * slow_down_factor),
"progress-mode", mode,
NULL);
g_signal_connect (priv->paging_animation, "stopped",
G_CALLBACK (animation_completed_cb), priv);
clutter_timeline_start (CLUTTER_TIMELINE (priv->paging_animation));
transition = g_object_new (CLUTTER_TYPE_PROPERTY_TRANSITION,
"property-name", "value",
"interval", clutter_interval_new (G_TYPE_DOUBLE, value, new_value),
"duration", (guint)(PAGING_SUBSEQUENT_REPEAT_TIMEOUT * slow_down_factor),
"progress-mode", mode,
"remove-on-complete", TRUE,
NULL);
st_adjustment_add_transition (priv->adjustment, "value", transition);
return ret;
}