forked from AuroraMiddleware/gtk
c726226825
GtkKineticScrolling implements the actual physics laws for friction and springs. When created, position/velocity/boundaries/constants are given, so at every gtk_kinetic_scrolling_tick() it returns the current position, and whether the system is in rest. https://bugzilla.gnome.org/show_bug.cgi?id=729608
44 lines
1.9 KiB
C
44 lines
1.9 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 (gdouble lower,
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gdouble upper,
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gdouble overshoot_width,
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gdouble decel_friction,
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gdouble overshoot_friction,
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gdouble initial_position,
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gdouble 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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gdouble time_delta,
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gdouble *position);
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G_END_DECLS
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#endif /* __GTK_KINETIC_SCROLLING_H__ */
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