Mercurial > molko
annotate libmlk-ui/mlk/ui/button.c @ 433:862b15c3a3ae
ui: cleanup hierarchy
author | David Demelier <markand@malikania.fr> |
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date | Sat, 15 Oct 2022 21:19:25 +0200 |
parents | src/libmlk-ui/ui/button.c@8f59201dc76b |
children | 773a082f0b91 |
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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) 2020-2022 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 "label.h" |
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30 #include "theme.h" |
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31 |
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32 static int |
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33 is_boxed(const struct button *button, const struct 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 == EVENT_CLICKDOWN || click->type == EVENT_CLICKUP); |
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38 |
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39 return maths_is_boxed(button->x, button->y, button->w, button->h, |
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40 click->x, click->y); |
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41 } |
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42 |
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43 void |
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44 button_draw_default(const struct theme *t, const struct button *button) |
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45 { |
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46 assert(t); |
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47 assert(button); |
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48 |
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49 (void)t; |
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50 |
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51 struct label label = { |
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52 .text = button->text, |
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53 }; |
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54 unsigned int lw, lh; |
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55 |
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56 label_query(&label, &lw, &lh); |
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57 |
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58 if (lw > button->w) |
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59 tracef("button width is too small for text: %u < %u", button->w, lw); |
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60 if (lh > button->h) |
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61 tracef("button height is too small for text: %u < %u", button->h, lh); |
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62 |
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63 align(ALIGN_CENTER, &label.x, &label.y, lw, lh, |
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64 button->x, button->y, button->w, button->h); |
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65 |
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66 painter_set_color(0x577277ff); |
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67 painter_draw_rectangle(button->x, button->y, button->w, button->h); |
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68 |
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69 label_draw(&label); |
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70 } |
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71 |
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72 int |
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73 button_handle(struct button *button, const union event *ev) |
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74 { |
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75 assert(button); |
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76 assert(ev); |
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77 |
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78 switch (ev->type) { |
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79 case EVENT_CLICKDOWN: |
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80 if (is_boxed(button, &ev->click)) |
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81 button->state = BUTTON_STATE_PRESSED; |
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82 break; |
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83 case EVENT_CLICKUP: |
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84 /* |
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85 * If the button was pressed, indicate that the button is |
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86 * finally activated. This let the user to move the cursor |
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87 * outside the button to "forget" the press. |
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88 */ |
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89 if (!is_boxed(button, &ev->click)) |
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90 button->state = BUTTON_STATE_NONE; |
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91 else if (button->state == BUTTON_STATE_PRESSED) |
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92 button->state = BUTTON_STATE_ACTIVATED; |
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93 break; |
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94 default: |
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95 break; |
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96 } |
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97 |
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98 return button->state == BUTTON_STATE_ACTIVATED; |
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99 } |
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100 |
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101 void |
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102 button_reset(struct button *button) |
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103 { |
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104 assert(button); |
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105 |
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106 button->state = BUTTON_STATE_NONE; |
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107 } |
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108 |
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109 void |
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110 button_draw(const struct button *button) |
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111 { |
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112 assert(button); |
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113 |
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114 theme_draw_button(button->theme, button); |
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115 } |