window.h - ltk - GUI toolkit for X11 (WIP)
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window.h (3299B)
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1 /*
2 * Copyright (c) 2020-2026 lumidify <nobody@lumidify.org>
3 *
4 * Permission to use, copy, modify, and/or distribute this software for any
5 * purpose with or without fee is hereby granted, provided that the above
6 * copyright notice and this permission notice appear in all copies.
7 *
8 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
14 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
15 */
16
17 #ifndef LTK_WINDOW_H
18 #define LTK_WINDOW_H
19
20 #include <stddef.h>
21 #include "event.h"
22 #include "graphics.h"
23 #include "rect.h"
24 #include "surface_cache.h"
25 #include "widget.h"
26
27 #define LTK_WINDOW_SIGNAL_CLOSE -1
28 #define LTK_WINDOW_SIGNAL_INVALID -2
29
30 typedef struct ltk_window {
31 ltk_widget widget;
32 ltk_renderwindow *renderwindow;
33 ltk_surface_cache *surface_cache;
34 ltk_surface *surface;
35 /* FIXME: check if these are reset properly if widget is deleted */
36 ltk_widget_id root_widget;
37 ltk_widget_id hover_widget;
38 ltk_widget_id active_widget;
39 ltk_widget_id pressed_widget;
40
41 ltk_rect rect;
42 ltk_rect dirty_rect;
43 ltk_array(widget_id) *popups;
44 /* This is a hack so ltk_window_unregister_all_popups can
45 call hide for all popup widgets even if the hide function
46 already calls ltk_window_unregister_popup */
47 char popups_locked;
48 } ltk_window;
49
50 /* FIXME: which of these should be internal to LTK? */
51 /* FIXME: should this maybe still take ltk_window directly? */
52 void ltk_window_handle_event(ltk_widget_id windowid, ltk_event *event);
53 void ltk_window_fake_motion_event(ltk_widget_id window, int x, int y);
54
55 /* FIXME: should there be versions that directly take window and widget instead of IDs?
56 -> I guess for invalidate_widget_rect, it doesn't really change much efficiency-wise
57 since getting the absolute widget rect goes through the parent hierarchy and needs
58 to look up all the widgets on the path anyways */
59 void ltk_window_invalidate_rect(ltk_widget_id window, ltk_rect rect);
60 void ltk_window_invalidate_widget_rect(ltk_widget_id window, ltk_widget_id widget);
61
62 void ltk_window_set_root_widget(ltk_widget_id window, ltk_widget_id widget);
63 void ltk_window_set_hover_widget(ltk_widget_id window, ltk_widget_id widget, ltk_motion_event *event);
64 void ltk_window_set_active_widget(ltk_widget_id window, ltk_widget_id widget);
65 void ltk_window_set_pressed_widget(ltk_widget_id window, ltk_widget_id widget, int release);
66
67 /* IMPORTANT: Callers must call ltk_widget_recalc_ideal_size and ltk_widget_resize
68 first to take DPI changes into account. It wouldn't make sense for ltk_window_register_popup
69 to call these functions because the calling function usually needs to know the actual size
70 of the popup to determine where to place it. */
71 void ltk_window_register_popup(ltk_widget_id window, ltk_widget_id popup);
72 void ltk_window_unregister_popup(ltk_widget_id window, ltk_widget_id popup);
73 void ltk_window_unregister_all_popups(ltk_widget_id window);
74
75 #endif /* LTK_WINDOW_H */