27d38eca9a
If we scroll down in a list that's still being filled, we hit the edge and initiate overshoot, and then the adjustment's upper value increases. This leads to an unwanted bounce back. Additionally, if in a similar situation the upper value decreases, the overscroll glow gets stuck. Update kinetic scrolling upper and lower value on changes, and immediately cancel it if dimensions on that side change. Fixes https://gitlab.gnome.org/GNOME/gtk/-/issues/3752
56 lines
2.5 KiB
C
56 lines
2.5 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 enum {
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GTK_KINETIC_SCROLLING_CHANGE_NONE = 0,
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GTK_KINETIC_SCROLLING_CHANGE_LOWER = 1 << 0,
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GTK_KINETIC_SCROLLING_CHANGE_UPPER = 1 << 1,
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GTK_KINETIC_SCROLLING_CHANGE_IN_OVERSHOOT = 1 << 2,
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} GtkKineticScrollingChange;
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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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GtkKineticScrollingChange gtk_kinetic_scrolling_update_size (GtkKineticScrolling *data,
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gdouble lower,
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gdouble upper);
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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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gdouble *velocity);
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G_END_DECLS
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#endif /* __GTK_KINETIC_SCROLLING_H__ */
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