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annotate libui/ui/label.h @ 161:31d7f23c0588

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ui: label no longer has w, h fields
author David Demelier <markand@malikania.fr>
date Sat, 17 Oct 2020 10:12:41 +0200
parents aa6e70e330a1
children 6992085d47fd
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1 /*
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2 * label.h -- GUI label
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3 *
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4 * Copyright (c) 2020 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 #ifndef MOLKO_LABEL_H
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20 #define MOLKO_LABEL_H
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21
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22 /**
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23 * \file label.h
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24 * \brief GUI label.
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25 * \ingroup ui
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26 */
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27
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28 struct action;
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29 struct theme;
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30
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31 /**
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32 * \brief Label flags.
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33 */
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34 enum label_flags {
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35 LABEL_FLAGS_NONE, /*!< No flags. */
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36 LABEL_FLAGS_SHADOW = (1 << 0), /*!< Enable shadow. */
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37 };
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38
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39 /**
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40 * \brief GUI label.
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41 */
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42 struct label {
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43 int x; /*!< (+) Position in x. */
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44 int y; /*!< (+) Position in y. */
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45 const char *text; /*!< (+&) Text to show. */
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46 enum label_flags flags; /*!< (+) Optional flags. */
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47 struct theme *theme; /*!< (+&?) Theme to use. */
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48 };
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49
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50 /**
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51 * Default drawing function.
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52 *
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53 * \pre t != NULL
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54 * \pre label != NULL
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55 * \param t the theme
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56 * \param label the label
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57 */
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58 void
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59 label_draw_default(struct theme *t, const struct label *label);
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60
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61 /**
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62 * Update the `w` and `h` fields with the dimensions the text would needs with
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63 * the current theme.
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64 *
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65 * \pre label != NULL
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66 * \param label the label
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67 * \param w the pointer to width (may be NULL)
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68 * \param h the pointer to height (may be NULL)
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69 */
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70 void
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71 label_query(struct label *label, unsigned int *w, unsigned int *h);
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72
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73 /**
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74 * Draw the label.
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75 *
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76 * \pre label != NULL
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77 * \param label the label to draw
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78 */
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79 void
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80 label_draw(const struct label *label);
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81
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82 /**
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83 * Convert the label into an action.
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84 *
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85 * The following field will be set into the action:
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86 *
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87 * - act->data: points to label (reference),
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88 * - act->draw: a wrapper to label_draw.
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89 *
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90 * The label being an UI element is considered to never completes, as such
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91 * you will need to handle this case or to use a custom update function.
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92 *
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93 * \pre frame != NULL
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94 * \pre act != NULL
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95 * \param label the label to reference
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96 * \param act the action to fill
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97 */
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98 void
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99 label_action(struct label *label, struct action *act);
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100
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101 #endif /* !MOLKO_LABEL_H */