forked from AuroraMiddleware/gtk
4b459a99be
Accumulate existing velocity when decelerating from a swipe if the swipe velocity is above a certain fraction of that existing velocity.
45 lines
2.0 KiB
C
45 lines
2.0 KiB
C
/* GTK - The GIMP Toolkit
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*
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* Copyright (C) 2014 Lieven van der Heide
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef __GTK_KINETIC_SCROLLING_H__
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#define __GTK_KINETIC_SCROLLING_H__
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#include <glib.h>
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G_BEGIN_DECLS
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typedef struct _GtkKineticScrolling GtkKineticScrolling;
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GtkKineticScrolling * gtk_kinetic_scrolling_new (double lower,
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double upper,
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double overshoot_width,
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double decel_friction,
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double overshoot_friction,
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double initial_position,
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double initial_velocity);
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void gtk_kinetic_scrolling_free (GtkKineticScrolling *kinetic);
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gboolean gtk_kinetic_scrolling_tick (GtkKineticScrolling *data,
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double time_delta,
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double *position,
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double *velocity);
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G_END_DECLS
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#endif /* __GTK_KINETIC_SCROLLING_H__ */
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