[libadwaita/wip/exalm/spring-animation-swipes: 8/10] swipe-tracker: Remove the duration parameter from end-swipe

[Alexander Mikhaylenko <alexm src gnome org>]

commit 11849510ba90790093ae130a3e46033b1f908e57
Author: Alexander Mikhaylenko <alexm gnome org>
Date:   Mon Dec 6 16:51:51 2021 +0500

    swipe-tracker: Remove the duration parameter from end-swipe
    
    All widgets have migrated, we can do it now.
    
    Fixes https://gitlab.gnome.org/GNOME/libadwaita/-/issues/27

 src/adw-carousel.c      |  1 -
 src/adw-flap.c          |  1 -
 src/adw-leaflet.c       |  1 -
 src/adw-swipe-tracker.c | 25 ++++++++-----------------
 4 files changed, 8 insertions(+), 20 deletions(-)
---
diff --git a/src/adw-carousel.c b/src/adw-carousel.c
index c75c130b..46a31c3a 100644
--- a/src/adw-carousel.c
+++ b/src/adw-carousel.c
@@ -421,7 +421,6 @@ update_swipe_cb (AdwSwipeTracker *tracker,
 
 static void
 end_swipe_cb (AdwSwipeTracker *tracker,
-              guint            duration,
               double           velocity,
               double           to,
               AdwCarousel     *self)
diff --git a/src/adw-flap.c b/src/adw-flap.c
index a310d3db..10a60f1a 100644
--- a/src/adw-flap.c
+++ b/src/adw-flap.c
@@ -423,7 +423,6 @@ update_swipe_cb (AdwSwipeTracker *tracker,
 
 static void
 end_swipe_cb (AdwSwipeTracker *tracker,
-              guint            duration,
               double           velocity,
               double           to,
               AdwFlap         *self)
diff --git a/src/adw-leaflet.c b/src/adw-leaflet.c
index 20ba1fe7..baeef771 100644
--- a/src/adw-leaflet.c
+++ b/src/adw-leaflet.c
@@ -1464,7 +1464,6 @@ update_swipe_cb (AdwSwipeTracker *tracker,
 
 static void
 end_swipe_cb (AdwSwipeTracker *tracker,
-              guint            duration,
               double           velocity,
               double           to,
               AdwLeaflet      *self)
diff --git a/src/adw-swipe-tracker.c b/src/adw-swipe-tracker.c
index d8920bc8..a477e977 100644
--- a/src/adw-swipe-tracker.c
+++ b/src/adw-swipe-tracker.c
@@ -426,7 +426,6 @@ gesture_end (AdwSwipeTracker *self,
              gboolean         is_touchpad)
 {
   double end_progress, velocity;
-  guint duration, max_duration;
 
   if (self->state == ADW_SWIPE_TRACKER_STATE_NONE)
     return;
@@ -434,21 +433,9 @@ gesture_end (AdwSwipeTracker *self,
   trim_history (self, time);
 
   velocity = calculate_velocity (self);
-
   end_progress = get_end_progress (self, velocity, is_touchpad);
 
-  velocity /= distance;
-
-  if ((end_progress - self->progress) * velocity <= 0)
-    velocity = ANIMATION_BASE_VELOCITY;
-
-  max_duration = MAX_ANIMATION_DURATION * log2 (1 + MAX (1, ceil (ABS (self->progress - end_progress))));
-
-  duration = ABS ((self->progress - end_progress) / velocity * DURATION_MULTIPLIER);
-  if (self->progress != end_progress)
-    duration = CLAMP (duration, MIN_ANIMATION_DURATION, max_duration);
-
-  g_signal_emit (self, signals[SIGNAL_END_SWIPE], 0, duration, calculate_velocity (self), end_progress);
+  g_signal_emit (self, signals[SIGNAL_END_SWIPE], 0, velocity, end_progress);
 
   if (!self->cancelled)
     self->state = ADW_SWIPE_TRACKER_STATE_FINISHING;
@@ -1151,12 +1138,16 @@ adw_swipe_tracker_class_init (AdwSwipeTrackerClass *klass)
   /**
    * AdwSwipeTracker::end-swipe:
    * @self: the `AdwSwipeTracker` instance
-   * @duration: snap-back animation duration in milliseconds
    * @velocity: the velocity of the swipe
    * @to: the progress value to animate to
    *
    * This signal is emitted as soon as the gesture has stopped.
    *
+   * The user is expected to animate the deceleration from the current progress
+   * value to @to with an animation using @velocity as the initial velocity,
+   * provided in pixels per second. [class@Adw.SpringAnimation] is usually a
+   * good fit for this.
+   *
    * Since: 1.0
    */
   signals[SIGNAL_END_SWIPE] =
@@ -1166,8 +1157,8 @@ adw_swipe_tracker_class_init (AdwSwipeTrackerClass *klass)
                   0,
                   NULL, NULL, NULL,
                   G_TYPE_NONE,
-                  3,
-                  G_TYPE_UINT, G_TYPE_DOUBLE, G_TYPE_DOUBLE);
+                  2,
+                  G_TYPE_DOUBLE, G_TYPE_DOUBLE);
 }
 
 static void