PIKApp/app/display/pikamotionbuffer.h

104 lines
4.2 KiB
C

/* PIKA - Photo and Image Kooker Application
* a rebranding of The GNU Image Manipulation Program (created with heckimp)
* A derived work which may be trivial. However, any changes may be (C)2023 by Aldercone Studio
*
* Original copyright, applying to most contents (license remains unchanged):
* Copyright (C) 1995 Spencer Kimball and Peter Mattis
*
* pikamotionbuffer.h
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
#ifndef __PIKA_MOTION_BUFFER_H__
#define __PIKA_MOTION_BUFFER_H__
#include "core/pikaobject.h"
#define PIKA_TYPE_MOTION_BUFFER (pika_motion_buffer_get_type ())
#define PIKA_MOTION_BUFFER(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), PIKA_TYPE_MOTION_BUFFER, PikaMotionBuffer))
#define PIKA_MOTION_BUFFER_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), PIKA_TYPE_MOTION_BUFFER, PikaMotionBufferClass))
#define PIKA_IS_MOTION_BUFFER(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), PIKA_TYPE_MOTION_BUFFER))
#define PIKA_IS_MOTION_BUFFER_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), PIKA_TYPE_MOTION_BUFFER))
#define PIKA_MOTION_BUFFER_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), PIKA_TYPE_MOTION_BUFFER, PikaMotionBufferClass))
typedef struct _PikaMotionBufferClass PikaMotionBufferClass;
struct _PikaMotionBuffer
{
PikaObject parent_instance;
guint32 last_read_motion_time;
guint32 last_motion_time; /* previous time of a forwarded motion event */
gdouble last_motion_delta_time;
gdouble last_motion_delta_x;
gdouble last_motion_delta_y;
gdouble last_motion_distance;
PikaCoords last_coords; /* last motion event */
GArray *event_history;
GArray *event_queue;
gboolean event_delay; /* TRUE if there's an unsent event in
* the history buffer
*/
gint event_delay_timeout;
GdkModifierType last_active_state;
};
struct _PikaMotionBufferClass
{
PikaObjectClass parent_class;
void (* stroke) (PikaMotionBuffer *buffer,
const PikaCoords *coords,
guint32 time,
GdkModifierType state);
void (* hover) (PikaMotionBuffer *buffer,
const PikaCoords *coords,
GdkModifierType state,
gboolean proximity);
};
GType pika_motion_buffer_get_type (void) G_GNUC_CONST;
PikaMotionBuffer * pika_motion_buffer_new (void);
void pika_motion_buffer_begin_stroke (PikaMotionBuffer *buffer,
guint32 time,
PikaCoords *last_motion);
void pika_motion_buffer_end_stroke (PikaMotionBuffer *buffer);
gboolean pika_motion_buffer_motion_event (PikaMotionBuffer *buffer,
PikaCoords *coords,
guint32 time,
gboolean event_fill);
guint32 pika_motion_buffer_get_last_motion_time (PikaMotionBuffer *buffer);
void pika_motion_buffer_request_stroke (PikaMotionBuffer *buffer,
GdkModifierType state,
guint32 time);
void pika_motion_buffer_request_hover (PikaMotionBuffer *buffer,
GdkModifierType state,
gboolean proximity);
#endif /* __PIKA_MOTION_BUFFER_H__ */