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| 1 | /* |
| 2 | * gui/input.h - Input operations |
| 3 | * |
| 4 | * Written 2016 by Werner Almesberger |
| 5 | * Copyright 2016 by Werner Almesberger |
| 6 | * |
| 7 | * This program is free software; you can redistribute it and/or modify |
| 8 | * it under the terms of the GNU General Public License as published by |
| 9 | * the Free Software Foundation; either version 2 of the License, or |
| 10 | * (at your option) any later version. |
| 11 | */ |
| 12 | |
| 13 | #ifndef GUI_INPUT_H |
| 14 | #define GUI_NPUT_H |
| 15 | |
| 16 | #include <stdbool.h> |
| 17 | |
| 18 | #include <gtk/gtk.h> |
| 19 | |
| 20 | |
| 21 | /* |
| 22 | * All members of input_ops are optional, i.e., can be NULL. |
| 23 | * |
| 24 | * hover_begin and drag_begin must not call input_push or input_pop. |
| 25 | */ |
| 26 | |
| 27 | struct input_ops { |
| 28 | bool (*click)(void *user, int x, int y); |
| 29 | |
| 30 | bool (*hover_begin)(void *user, int x, int y); |
| 31 | bool (*hover_update)(void *user, int x, int y); |
| 32 | bool (*hover_click)(void *user, int x, int y); |
| 33 | void (*hover_end)(void *user); |
| 34 | |
| 35 | bool (*drag_begin)(void *user, int x, int y); |
| 36 | void (*drag_move)(void *user, int dx, int dy); |
| 37 | void (*drag_end)(void *user); |
| 38 | |
| 39 | void (*scroll)(void *user, int x, int y, int dy); |
| 40 | /* down = 1, up = -1 */ |
| 41 | |
| 42 | void (*key)(void *user, int x, int y, int keyval); |
| 43 | }; |
| 44 | |
| 45 | |
| 46 | bool input_accept(void *user, int x, int y); |
| 47 | |
| 48 | void input_update(void); |
| 49 | |
| 50 | void input_push(const struct input_ops *ops, void *user); |
| 51 | void input_pop(void); |
| 52 | void input_setup(GtkWidget *da); |
| 53 | |
| 54 | #endif /* !GUI_INPUT_H */ |
| 55 |
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