#define SCROLL_FADE_TIMEOUT 100
#define MOTION_EVENTS_PER_SECOND 25
#define CURSOR_STOPPED_TIMEOUT 200
-#define MAX_SPEED_THRESHOLD 290
+#define MAX_SPEED_THRESHOLD 280
#define PANNABLE_MAX_WIDTH 788
#define PANNABLE_MAX_HEIGHT 378
+#define ACCEL_FACTOR 27
+#define MIN_ACCEL_THRESHOLD 40
+#define FAST_CLICK 125
G_DEFINE_TYPE (HildonPannableArea, hildon_pannable_area, GTK_TYPE_BIN)
gdouble vmin;
gdouble vmax;
gdouble vmax_overshooting;
+ gdouble accel_vel_x;
+ gdouble accel_vel_y;
gdouble vfast_factor;
gdouble decel;
gdouble drag_inertia;
priv->overshot_dist_y = 0;
priv->overshooting_y = 0;
priv->overshooting_x = 0;
+ priv->accel_vel_x = 0;
+ priv->accel_vel_y = 0;
priv->idle_id = 0;
priv->vel_x = 0;
priv->vel_y = 0;
gtk_widget_size_allocate (child, &child_allocation);
}
+ if (priv->vadjust->page_size >= 0) {
+ priv->accel_vel_y = MIN (priv->vmax,
+ priv->vadjust->upper/priv->vadjust->page_size*ACCEL_FACTOR);
+ priv->accel_vel_x = MIN (priv->vmax,
+ priv->hadjust->upper/priv->hadjust->page_size*ACCEL_FACTOR);
+ }
+
hv = priv->hadjust->value;
vv = priv->vadjust->value;
return FALSE;
}
+ hildon_pannable_area_scroll (area, priv->vel_x, priv->vel_y);
+
+ gdk_window_process_updates (GTK_WIDGET (area)->window, FALSE);
+
if (!priv->button_pressed) {
/* Decelerate gradually when pointer is raised */
if ((!priv->overshot_dist_y) &&
return FALSE;
}
- hildon_pannable_area_scroll (area, priv->vel_x, priv->vel_y);
-
- gdk_window_process_updates (GTK_WIDGET (area)->window, FALSE);
-
return TRUE;
}
priv->button_pressed = FALSE;
/* if widget was moving fast in the panning, increase speed even more */
- if ((event->time - priv->last_press_time < 125) &&
+ if ((event->time - priv->last_press_time < FAST_CLICK) &&
((ABS (priv->old_vel_x) > priv->vmin) ||
(ABS (priv->old_vel_y) > priv->vmin)) &&
- ((ABS (priv->old_vel_x) > 40) ||
- (ABS (priv->old_vel_y) > 40)))
+ ((ABS (priv->old_vel_x) > MIN_ACCEL_THRESHOLD) ||
+ (ABS (priv->old_vel_y) > MIN_ACCEL_THRESHOLD)))
{
gint symbol = 0;
symbol = ((priv->vel_x * priv->old_vel_x) > 0) ? 1 : -1;
priv->vel_x = symbol *
- (priv->old_vel_x + ((priv->old_vel_x > 0) ? priv->vmax : -priv->vmax));
+ (priv->old_vel_x + ((priv->old_vel_x > 0) ? priv->accel_vel_x
+ : -priv->accel_vel_x));
symbol = 0;
symbol = ((priv->vel_y * priv->old_vel_y) > 0) ? 1 : -1;
priv->vel_y = symbol *
- (priv->old_vel_y + ((priv->old_vel_y > 0) ? priv->vmax : -priv->vmax));
+ (priv->old_vel_y + ((priv->old_vel_y > 0) ? priv->accel_vel_y
+ : -priv->accel_vel_y));
force_fast = FALSE;
}
priv->scroll_indicator_alpha = 1.0;
if (force_fast) {
- if (ABS (priv->vel_x) > MAX_SPEED_THRESHOLD)
- priv->vel_x = (priv->vel_x > 0) ? priv->vmax : -priv->vmax;
+ if ((ABS (priv->vel_x) > MAX_SPEED_THRESHOLD) &&
+ (priv->accel_vel_x > MAX_SPEED_THRESHOLD))
+ priv->vel_x = (priv->vel_x > 0) ? priv->accel_vel_x : -priv->accel_vel_x;
- if (ABS (priv->vel_y) > MAX_SPEED_THRESHOLD)
- priv->vel_y = (priv->vel_y > 0) ? priv->vmax : -priv->vmax;
+ if ((ABS (priv->vel_y) > MAX_SPEED_THRESHOLD) &&
+ (priv->accel_vel_y > MAX_SPEED_THRESHOLD))
+ priv->vel_y = (priv->vel_y > 0) ? priv->accel_vel_y : -priv->accel_vel_y;
}
if (!priv->idle_id)
fct += fct_i;
}
- priv->vel_factor = fct;
+ priv->vel_factor = fct;
}
/**