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range: Avoid animations during slider drag

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If the drag gesture gets a GtkGesture::updated signal, the user
is directly interacting through pointer/touch with the range slider,
animating the adjustment value change in this situation can produce
perceived lag, so set the value immediately when this is happening.
This commit is contained in:
Carlos Garnacho 2014-07-08 15:35:18 +02:00 committed by Matthias Clasen
parent ea19e595a1
commit d5b96b95a0
1 changed files with 10 additions and 1 deletions
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11
gtk/gtkrange.c
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@ -156,6 +156,9 @@ struct _GtkRangePrivate
/* Fill level */
guint show_fill_level : 1;
guint restrict_to_fill_level : 1;
/* Whether dragging is ongoing */
guint in_drag : 1;
};
@ -2909,6 +2912,7 @@ gtk_range_drag_gesture_update (GtkGestureDrag *gesture,
gtk_gesture_drag_get_start_point (gesture, &start_x, &start_y);
priv->mouse_x = start_x + offset_x;
priv->mouse_y = start_y + offset_y;
priv->in_drag = TRUE;
update_autoscroll_mode (range);
@ -2922,6 +2926,7 @@ gtk_range_drag_gesture_end (GtkGestureDrag *gesture,
gdouble offset_y,
GtkRange *range)
{
range->priv->in_drag = FALSE;
stop_scrolling (range);
}
@ -3997,7 +4002,11 @@ gtk_range_real_change_value (GtkRange *range,
priv->need_recalc = TRUE;
gtk_widget_queue_draw (GTK_WIDGET (range));
gtk_adjustment_animate_to_value (priv->adjustment, value);
if (priv->in_drag)
gtk_adjustment_set_value (priv->adjustment, value);
else
gtk_adjustment_animate_to_value (priv->adjustment, value);
}
return FALSE;