forked from AuroraMiddleware/gtk
c3fbd58916
This is a GtkEventController implementation to handle mouse scrolling. It handles both smooth and discrete events and offers a way for callers to tell their preference too, so smooth events shall be accumulated and coalesced on request. On capable devices, it can also emit ::scroll-begin and ::scroll-end enclosing all ::scroll events for a scroll operation. It also has builtin kinetic scrolling capabilities, reporting the initial velocity for both axes after ::scroll-end if requested.
67 lines
3.1 KiB
C
67 lines
3.1 KiB
C
/* GTK - The GIMP Toolkit
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* Copyright (C) 2017, Red Hat, Inc.
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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 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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* Author(s): Carlos Garnacho <carlosg@gnome.org>
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*/
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#ifndef __GTK_EVENT_CONTROLLER_SCROLL_H__
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#define __GTK_EVENT_CONTROLLER_SCROLL_H__
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#if !defined (__GTK_H_INSIDE__) && !defined (GTK_COMPILATION)
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#error "Only <gtk/gtk.h> can be included directly."
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#endif
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#include <gdk/gdk.h>
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#include <gtk/gtkeventcontroller.h>
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G_BEGIN_DECLS
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#define GTK_TYPE_EVENT_CONTROLLER_SCROLL (gtk_event_controller_scroll_get_type ())
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#define GTK_EVENT_CONTROLLER_SCROLL(o) (G_TYPE_CHECK_INSTANCE_CAST ((o), GTK_TYPE_EVENT_CONTROLLER_SCROLL, GtkEventControllerScroll))
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#define GTK_EVENT_CONTROLLER_SCROLL_CLASS(k) (G_TYPE_CHECK_CLASS_CAST ((k), GTK_TYPE_EVENT_CONTROLLER_SCROLL, GtkEventControllerScrollClass))
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#define GTK_IS_EVENT_CONTROLLER_SCROLL(o) (G_TYPE_CHECK_INSTANCE_TYPE ((o), GTK_TYPE_EVENT_CONTROLLER_SCROLL))
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#define GTK_IS_EVENT_CONTROLLER_SCROLL_CLASS(k) (G_TYPE_CHECK_CLASS_TYPE ((k), GTK_TYPE_EVENT_CONTROLLER_SCROLL))
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#define GTK_EVENT_CONTROLLER_SCROLL_GET_CLASS(o) (G_TYPE_INSTANCE_GET_CLASS ((o), GTK_TYPE_EVENT_CONTROLLER_SCROLL, GtkEventControllerScrollClass))
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typedef struct _GtkEventControllerScroll GtkEventControllerScroll;
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typedef struct _GtkEventControllerScrollClass GtkEventControllerScrollClass;
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typedef enum {
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GTK_EVENT_CONTROLLER_SCROLL_NONE = 0,
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GTK_EVENT_CONTROLLER_SCROLL_VERTICAL = 1 << 0,
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GTK_EVENT_CONTROLLER_SCROLL_HORIZONTAL = 1 << 1,
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GTK_EVENT_CONTROLLER_SCROLL_DISCRETE = 1 << 2,
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GTK_EVENT_CONTROLLER_SCROLL_KINETIC = 1 << 3,
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GTK_EVENT_CONTROLLER_SCROLL_BOTH_AXES = (GTK_EVENT_CONTROLLER_SCROLL_VERTICAL | GTK_EVENT_CONTROLLER_SCROLL_HORIZONTAL),
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} GtkEventControllerScrollFlags;
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GDK_AVAILABLE_IN_3_92
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GType gtk_event_controller_scroll_get_type (void) G_GNUC_CONST;
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GDK_AVAILABLE_IN_3_92
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GtkEventController *gtk_event_controller_scroll_new (GtkWidget *widget,
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GtkEventControllerScrollFlags flags);
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GDK_AVAILABLE_IN_3_92
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void gtk_event_controller_scroll_set_flags (GtkEventControllerScroll *controller,
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GtkEventControllerScrollFlags flags);
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GDK_AVAILABLE_IN_3_92
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GtkEventControllerScrollFlags
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gtk_event_controller_scroll_get_flags (GtkEventControllerScroll *controller);
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G_END_DECLS
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#endif /* __GTK_EVENT_CONTROLLER_SCROLL_H__ */
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