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GtkScrolledWindow: use GdkFrameClock for kinetic scrolling

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Use GdkFrameClock when animating scrolling via touch, rather
than a timeout.

https://bugzilla.gnome.org/show_bug.cgi?id=685460
This commit is contained in:
Owen W. Taylor
2012-10-02 19:54:15 -04:00
parent 623803c1fe
commit 05386b44e0
1 changed files with 23 additions and 16 deletions
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39
gtk/gtkscrolledwindow.c
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@ -126,7 +126,6 @@
#define TOUCH_BYPASS_CAPTURED_THRESHOLD 30
/* Kinetic scrolling */
#define FRAME_INTERVAL (1000 / 60)
#define MAX_OVERSHOOT_DISTANCE 50
#define FRICTION_DECELERATION 0.003
#define OVERSHOOT_INVERSE_ACCELERATION 0.003
@ -284,6 +283,8 @@ static gboolean _gtk_scrolled_window_set_adjustment_value (GtkScrolledWindo
gboolean allow_overshooting,
gboolean snap_to_border);
static void gtk_scrolled_window_cancel_deceleration (GtkScrolledWindow *scrolled_window);
static guint signals[LAST_SIGNAL] = {0};
G_DEFINE_TYPE (GtkScrolledWindow, gtk_scrolled_window, GTK_TYPE_BIN)
@ -2383,10 +2384,10 @@ _gtk_scrolled_window_set_adjustment_value (GtkScrolledWindow *scrolled_window,
return (*prev_value != value);
}
static gboolean
scrolled_window_deceleration_cb (gpointer user_data)
static void
scrolled_window_deceleration_cb (GdkFrameClock *frame_clock,
KineticScrollData *data)
{
KineticScrollData *data = user_data;
GtkScrolledWindow *scrolled_window = data->scrolled_window;
GtkScrolledWindowPrivate *priv = scrolled_window->priv;
GtkAdjustment *hadjustment, *vadjustment;
@ -2401,7 +2402,7 @@ scrolled_window_deceleration_cb (gpointer user_data)
_gtk_scrolled_window_get_overshoot (scrolled_window,
&old_overshoot_x, &old_overshoot_y);
current_time = g_get_monotonic_time ();
current_time = gdk_frame_clock_get_frame_time (frame_clock);
elapsed = (current_time - data->last_deceleration_time) / 1000;
data->last_deceleration_time = current_time;
@ -2495,12 +2496,9 @@ scrolled_window_deceleration_cb (gpointer user_data)
if (overshoot_x != 0 || overshoot_y != 0 ||
data->x_velocity != 0 || data->y_velocity != 0)
return TRUE;
gdk_frame_clock_request_phase (frame_clock, GDK_FRAME_CLOCK_PHASE_UPDATE);
else
{
priv->deceleration_id = 0;
return FALSE;
}
gtk_scrolled_window_cancel_deceleration (scrolled_window);
}
static void
@ -2510,7 +2508,11 @@ gtk_scrolled_window_cancel_deceleration (GtkScrolledWindow *scrolled_window)
if (priv->deceleration_id)
{
g_source_remove (priv->deceleration_id);
GdkFrameClock *frame_clock;
frame_clock = gtk_widget_get_frame_clock (GTK_WIDGET (scrolled_window));
g_signal_handler_disconnect (frame_clock,
priv->deceleration_id);
priv->deceleration_id = 0;
}
}
@ -2519,12 +2521,15 @@ static void
gtk_scrolled_window_start_deceleration (GtkScrolledWindow *scrolled_window)
{
GtkScrolledWindowPrivate *priv = scrolled_window->priv;
GdkFrameClock *frame_clock;
KineticScrollData *data;
gdouble angle;
frame_clock = gtk_widget_get_frame_clock (GTK_WIDGET (scrolled_window));
data = g_new0 (KineticScrollData, 1);
data->scrolled_window = scrolled_window;
data->last_deceleration_time = g_get_monotonic_time ();
data->last_deceleration_time = gdk_frame_clock_get_frame_time (frame_clock);
data->x_velocity = priv->x_velocity;
data->y_velocity = priv->y_velocity;
@ -2536,10 +2541,12 @@ gtk_scrolled_window_start_deceleration (GtkScrolledWindow *scrolled_window)
data->vel_sine = sin (angle);
scrolled_window->priv->deceleration_id =
gdk_threads_add_timeout_full (G_PRIORITY_DEFAULT,
FRAME_INTERVAL,
scrolled_window_deceleration_cb,
data, (GDestroyNotify) g_free);
g_signal_connect_data (frame_clock, "update",
G_CALLBACK (scrolled_window_deceleration_cb),
data,
(GClosureNotify) g_free,
0);
gdk_frame_clock_request_phase (frame_clock, GDK_FRAME_CLOCK_PHASE_UPDATE);
}
static gboolean