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comparison libmlk-ui/ui/button.c @ 243:71b3b7036de7

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misc: lot of cleanups, - prefix libraries with libmlk, - move assets from source directories closes #2520, - prefix header guards closes #2519
author David Demelier <markand@malikania.fr>
date Sat, 28 Nov 2020 22:37:30 +0100
parents libui/ui/button.c@76afe639fd72
children 196264679079
comparison
equal deleted inserted replaced
242:4c24604efcab 243:71b3b7036de7
1 /*
2 * button.c -- GUI button
3 *
4 * Copyright (c) 2020 David Demelier <markand@malikania.fr>
5 *
6 * Permission to use, copy, modify, and/or distribute this software for any
7 * purpose with or without fee is hereby granted, provided that the above
8 * copyright notice and this permission notice appear in all copies.
9 *
10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17 */
18
19 #include <assert.h>
20 #include <string.h>
21
22 #include <core/action.h>
23 #include <core/event.h>
24 #include <core/maths.h>
25 #include <core/painter.h>
26 #include <core/trace.h>
27
28 #include "align.h"
29 #include "button.h"
30 #include "label.h"
31 #include "theme.h"
32 #include "ui_p.h"
33
34 static bool
35 is_boxed(const struct button *button, const struct event_click *click)
36 {
37 assert(button);
38 assert(click);
39 assert(click->type == EVENT_CLICKDOWN || click->type == EVENT_CLICKUP);
40
41 return maths_is_boxed(button->x, button->y, button->w, button->h,
42 click->x, click->y);
43 }
44
45 static void
46 handle(struct action *act, const union event *ev)
47 {
48 button_handle(act->data, ev);
49 }
50
51 static void
52 draw(struct action *act)
53 {
54 button_draw(act->data);
55 }
56
57 void
58 button_draw_default(const struct theme *t, const struct button *button)
59 {
60 assert(t);
61 assert(button);
62
63 (void)t;
64
65 struct label label = {
66 .text = button->text,
67 };
68 unsigned int lw, lh;
69
70 label_query(&label, &lw, &lh);
71
72 if (lw > button->w)
73 tracef(_("button width is too small for text: %u < %u"), button->w, lw);
74 if (lh > button->h)
75 tracef(_("button height is too small for text: %u < %u"), button->h, lh);
76
77 align(ALIGN_CENTER, &label.x, &label.y, lw, lh,
78 button->x, button->y, button->w, button->h);
79
80 painter_set_color(0x577277ff);
81 painter_draw_rectangle(button->x, button->y, button->w, button->h);
82
83 label_draw(&label);
84 }
85
86 void
87 button_handle(struct button *button, const union event *ev)
88 {
89 assert(button);
90 assert(ev);
91
92 switch (ev->type) {
93 case EVENT_CLICKDOWN:
94 if (is_boxed(button, &ev->click))
95 button->state = BUTTON_STATE_PRESSED;
96 break;
97 case EVENT_CLICKUP:
98 /*
99 * If the button was pressed, indicate that the button is
100 * finally activated. This let the user to move the cursor
101 * outside the button to "forget" the press.
102 */
103 if (!is_boxed(button, &ev->click))
104 button->state = BUTTON_STATE_NONE;
105 else if (button->state == BUTTON_STATE_PRESSED)
106 button->state = BUTTON_STATE_ACTIVATED;
107 break;
108 default:
109 break;
110 }
111 }
112
113 void
114 button_reset(struct button *button)
115 {
116 assert(button);
117
118 button->state = BUTTON_STATE_NONE;
119 }
120
121 void
122 button_draw(const struct button *button)
123 {
124 assert(button);
125
126 theme_draw_button(button->theme, button);
127 }
128
129 void
130 button_action(struct button *button, struct action *act)
131 {
132 assert(button);
133 assert(act);
134
135 memset(act, 0, sizeof (*act));
136 act->data = button;
137 act->handle = handle;
138 act->draw = draw;
139 }