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annotate libmlk-ui/mlk/ui/button.c @ 646:7e1eb7f6c049 default tip @

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misc: remove .clang
author David Demelier <markand@malikania.fr>
date Sun, 04 Feb 2024 15:24:37 +0100
parents 509b395171f2
children
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1 /*
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2 * button.c -- GUI button
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3 *
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4 * Copyright (c) 2020-2023 David Demelier <markand@malikania.fr>
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5 *
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6 * Permission to use, copy, modify, and/or distribute this software for any
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7 * purpose with or without fee is hereby granted, provided that the above
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8 * copyright notice and this permission notice appear in all copies.
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9 *
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10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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17 */
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18
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19 #include <assert.h>
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20 #include <string.h>
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22 #include <mlk/core/color.h>
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23 #include <mlk/core/event.h>
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24 #include <mlk/core/maths.h>
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25 #include <mlk/core/painter.h>
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26 #include <mlk/core/trace.h>
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27
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28 #include "align.h"
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29 #include "button.h"
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30 #include "ui.h"
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31 #include "ui_p.h"
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32
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33 static inline int
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34 is_boxed(const struct mlk_button *button, const struct mlk_event_click *click)
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35 {
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36 assert(button);
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37 assert(click);
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38 assert(click->type == MLK_EVENT_CLICKDOWN || click->type == MLK_EVENT_CLICKUP);
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39
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40 return mlk_maths_is_boxed(click->x, click->y,
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41 button->x, button->y, button->w, button->h);
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42 }
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43
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44 static void
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45 draw_frame(struct mlk_button_style *self, struct mlk_button *button)
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46 {
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47 unsigned long background = self->background;
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48 unsigned long border = self->border;
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49
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50 if (button->pressed) {
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51 background = mlk_color_darken(background, 0.9);
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52 border = mlk_color_darken(border, 0.9);
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53 }
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54
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55 mlk_painter_set_color(border);
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56 mlk_painter_draw_rectangle(button->x, button->y, button->w, button->h);
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57 mlk_painter_set_color(background);
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58 mlk_painter_draw_rectangle(
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59 button->x + self->border_size,
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60 button->y + self->border_size,
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61 button->w - (self->border_size * 2),
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62 button->h - (self->border_size * 2)
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63 );
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64 }
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65
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66 static void
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67 draw_text(struct mlk_button_style *style, struct mlk_button *button)
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68 {
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69 mlk_ui_draw_text(
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70 MLK_ALIGN_CENTER,
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71 MLK__STYLE_FONT(style->font, MLK_UI_FONT_INTERFACE),
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72 style->color,
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73 button->text,
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74 button->x,
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75 button->y,
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76 button->w,
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77 button->h
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78 );
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79 }
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80
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81 struct mlk_button_style mlk_button_style_dark = {
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82 .background = 0x222323ff,
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83 .border = 0x141414ff,
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84 .border_size = 2,
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85 .color = 0xffffffff,
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86 .draw_frame = draw_frame,
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87 .draw_text = draw_text
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88 };
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89
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90 struct mlk_button_style mlk_button_style_light = {
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91 .background = 0xf5f7faff,
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92 .border = 0xcdd2daff,
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93 .border_size = 2,
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94 .color = 0x000000ff,
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95 .draw_frame = draw_frame,
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96 .draw_text = draw_text
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97 };
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98
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99 struct mlk_button_style *mlk_button_style = &mlk_button_style_light;
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100
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101 int
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102 mlk_button_handle(struct mlk_button *button, const union mlk_event *ev)
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103 {
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104 assert(button);
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105 assert(ev);
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106
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107 int active = 0;
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108
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109 switch (ev->type) {
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110 case MLK_EVENT_CLICKDOWN:
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111 if (is_boxed(button, &ev->click))
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112 button->pressed = 1;
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113 break;
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114 case MLK_EVENT_CLICKUP:
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115 /*
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116 * If the button was pressed, indicate that the button is
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117 * finally activated. This let the user to move the cursor
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118 * outside the button to "forget" the press.
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119 */
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120 button->pressed = 0;
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121
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122 if (is_boxed(button, &ev->click))
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123 active = 1;
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124 break;
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125 default:
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126 break;
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127 }
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128
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129 return active;
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130 }
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131
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132 void
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133 mlk_button_update(struct mlk_button *button, unsigned int ticks)
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134 {
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135 assert(button);
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136
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137 MLK__STYLE_CALL(button->style, mlk_button_style, update, button, ticks);
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138 }
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139
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140 void
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141 mlk_button_draw(struct mlk_button *button)
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142 {
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143 assert(button);
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144
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145 MLK__STYLE_CALL(button->style, mlk_button_style, draw_frame, button);
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146
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147 if (button->text)
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148 MLK__STYLE_CALL(button->style, mlk_button_style, draw_text, button);
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149 }