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annotate libmlk-ui/mlk/ui/button.c @ 528:95792046d3d2

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core: doxygenize maths
author David Demelier <markand@malikania.fr>
date Sat, 04 Mar 2023 20:16:03 +0100
parents 7e7c6786d21e
children ed1d3244ed57
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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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21
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22 #include <mlk/core/event.h>
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23 #include <mlk/core/maths.h>
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24 #include <mlk/core/painter.h>
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25 #include <mlk/core/trace.h>
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26
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27 #include "align.h"
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28 #include "button.h"
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29 #include "ui.h"
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30 #include "ui_p.h"
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31
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32 static inline int
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33 is_boxed(const struct mlk_button *button, const struct mlk_event_click *click)
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34 {
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35 assert(button);
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36 assert(click);
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37 assert(click->type == MLK_EVENT_CLICKDOWN || click->type == MLK_EVENT_CLICKUP);
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38
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39 return mlk_maths_is_boxed(click->x, click->y,
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40 button->x, button->y, button->w, button->h);
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41 }
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42
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43 static inline struct mlk_font *
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44 style_font(const struct mlk_button *button)
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45 {
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46 const struct mlk_button_style *style = MLK__STYLE(button, mlk_button_style);
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47
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48 if (style->text_font)
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49 return style->text_font;
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50
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51 return mlk_ui_fonts[MLK_UI_FONT_INTERFACE];
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52 }
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53
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54 static void
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55 delegate_draw_frame(struct mlk_button_delegate *delegate, const struct mlk_button *button)
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56 {
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57 (void)delegate;
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58
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59 const struct mlk_button_style *style = MLK__STYLE(button, mlk_button_style);
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60 unsigned long long border_color, bg_color;
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61
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62 if (button->pressed) {
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63 bg_color = style->pressed_bg_color;
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64 border_color = style->pressed_border_color;
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65 } else {
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66 bg_color = style->bg_color;
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67 border_color = style->border_color;
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68 }
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69
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70 mlk_painter_set_color(border_color);
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71 mlk_painter_draw_rectangle(button->x, button->y, button->w, button->h);
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72 mlk_painter_set_color(bg_color);
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73 mlk_painter_draw_rectangle(
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74 button->x + style->border_size,
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75 button->y + style->border_size,
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76 button->w - (style->border_size * 2),
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77 button->h - (style->border_size * 2)
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78 );
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79 }
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80
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81 static void
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82 delegate_draw_text(struct mlk_button_delegate *delegate, const struct mlk_button *button)
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83 {
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84 (void)delegate;
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85
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86 const struct mlk_button_style *style = MLK__STYLE(button, mlk_button_style);
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87 unsigned long long text_color;
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88
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89 if (button->pressed)
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90 text_color = style->pressed_text_color;
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91 else
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92 text_color = style->text_color;
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93
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94 mlk_ui_draw_text(
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95 MLK_ALIGN_CENTER,
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96 style_font(button),
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97 text_color,
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98 button->text,
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99 button->x,
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100 button->y,
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101 button->w,
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102 button->h
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103 );
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104 }
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105
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106 struct mlk_button_style mlk_button_style = {
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107 .bg_color = MLK_UI_COLOR_BG,
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108 .pressed_bg_color = 0xcdd2daff,
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109 .border_color = MLK_UI_COLOR_BORDER,
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110 .pressed_border_color = 0xa6aebaff,
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111 .border_size = 1,
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112 .text_color = MLK_UI_COLOR_TEXT,
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113 .pressed_text_color = MLK_UI_COLOR_TEXT
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114 };
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115
507
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116 struct mlk_button_delegate mlk_button_delegate = {
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117 .draw_frame = delegate_draw_frame,
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118 .draw_text = delegate_draw_text
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119 };
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120
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121 int
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122 mlk_button_ok(const struct mlk_button *button)
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123 {
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124 if (!button)
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125 return 0;
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126 if (button->text && strlen(button->text) == 0)
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127 return 0;
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128
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129 return 1;
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130 }
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131
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132 int
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133 mlk_button_handle(struct mlk_button *button, const union mlk_event *ev)
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134 {
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135 assert(button);
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136 assert(ev);
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137
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138 int active = 0;
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139
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140 switch (ev->type) {
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141 case MLK_EVENT_CLICKDOWN:
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142 if (is_boxed(button, &ev->click))
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143 button->pressed = 1;
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144 break;
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145 case MLK_EVENT_CLICKUP:
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146 /*
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147 * If the button was pressed, indicate that the button is
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148 * finally activated. This let the user to move the cursor
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149 * outside the button to "forget" the press.
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150 */
502
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151 button->pressed = 0;
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152
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153 if (is_boxed(button, &ev->click))
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154 active = 1;
99
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155 break;
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156 default:
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157 break;
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158 }
409
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159
502
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160 return active;
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161 }
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162
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163 void
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164 mlk_button_update(struct mlk_button *button, unsigned int ticks)
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165 {
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166 assert(button);
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167
507
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168 MLK__DELEGATE_INVOKE(button->delegate, mlk_button_delegate, update, button, ticks);
99
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169 }
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170
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171 void
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172 mlk_button_draw(const struct mlk_button *button)
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173 {
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174 assert(button);
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175
507
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176 MLK__DELEGATE_INVOKE(button->delegate, mlk_button_delegate, draw_frame, button);
502
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177
507
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178 if (button->text)
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179 MLK__DELEGATE_INVOKE(button->delegate, mlk_button_delegate, draw_text, button);
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180 }