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annotate DPF-Prymula-audioplugins/dpf/distrho/src/lv2/lv2_external_ui.h @ 5:0c50890ef159

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flappyufo-0.230919-1
author prymula <prymula76@outlook.com>
date Wed, 31 Jan 2024 13:23:13 +0100
parents 84e66ea83026
children
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1 /*
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2 LV2 External UI extension
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3 This work is in public domain.
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4
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5 This file is distributed in the hope that it will be useful,
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6 but WITHOUT ANY WARRANTY; without even the implied warranty of
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7 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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8
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9 If you have questions, contact Filipe Coelho (aka falkTX) <falktx@falktx.com>
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10 or ask in #lad channel, FreeNode IRC network.
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11 */
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12
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13 /**
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14 @file lv2_external_ui.h
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15 C header for the LV2 External UI extension <http://kxstudio.sf.net/ns/lv2ext/external-ui>.
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16 */
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17
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18 #ifndef LV2_EXTERNAL_UI_H
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19 #define LV2_EXTERNAL_UI_H
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20
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21 #include "ui.h"
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22
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23 #define LV2_EXTERNAL_UI_URI "http://kxstudio.sf.net/ns/lv2ext/external-ui"
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24 #define LV2_EXTERNAL_UI_PREFIX LV2_EXTERNAL_UI_URI "#"
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25
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26 #define LV2_EXTERNAL_UI__Host LV2_EXTERNAL_UI_PREFIX "Host"
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27 #define LV2_EXTERNAL_UI__Widget LV2_EXTERNAL_UI_PREFIX "Widget"
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28
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29 /** This extension used to be defined by a lv2plug.in URI */
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30 #define LV2_EXTERNAL_UI_DEPRECATED_URI "http://lv2plug.in/ns/extensions/ui#external"
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31
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32 #ifdef __cplusplus
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33 extern "C" {
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34 #endif
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35
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36 /**
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37 * When LV2_EXTERNAL_UI__Widget UI is instantiated, the returned
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38 * LV2UI_Widget handle must be cast to pointer to LV2_External_UI_Widget.
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39 * UI is created in invisible state.
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40 */
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41 typedef struct _LV2_External_UI_Widget {
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42 /**
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43 * Host calls this function regulary. UI library implementing the
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44 * callback may do IPC or redraw the UI.
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45 *
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46 * @param _this_ the UI context
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47 */
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48 void (*run)(struct _LV2_External_UI_Widget * _this_);
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49
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50 /**
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51 * Host calls this function to make the plugin UI visible.
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52 *
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53 * @param _this_ the UI context
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54 */
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55 void (*show)(struct _LV2_External_UI_Widget * _this_);
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56
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57 /**
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58 * Host calls this function to make the plugin UI invisible again.
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59 *
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60 * @param _this_ the UI context
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61 */
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62 void (*hide)(struct _LV2_External_UI_Widget * _this_);
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63
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64 } LV2_External_UI_Widget;
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65
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66 #define LV2_EXTERNAL_UI_RUN(ptr) (ptr)->run(ptr)
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67 #define LV2_EXTERNAL_UI_SHOW(ptr) (ptr)->show(ptr)
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68 #define LV2_EXTERNAL_UI_HIDE(ptr) (ptr)->hide(ptr)
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69
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70 /**
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71 * On UI instantiation, host must supply LV2_EXTERNAL_UI__Host feature.
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72 * LV2_Feature::data must be pointer to LV2_External_UI_Host.
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73 */
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74 typedef struct _LV2_External_UI_Host {
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75 /**
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76 * Callback that plugin UI will call when UI (GUI window) is closed by user.
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77 * This callback will be called during execution of LV2_External_UI_Widget::run()
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78 * (i.e. not from background thread).
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79 *
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80 * After this callback is called, UI is defunct. Host must call LV2UI_Descriptor::cleanup().
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81 * If host wants to make the UI visible again, the UI must be reinstantiated.
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82 *
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83 * @note When using the depreated URI LV2_EXTERNAL_UI_DEPRECATED_URI,
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84 * some hosts will not call LV2UI_Descriptor::cleanup() as they should,
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85 * and may call show() again without re-initialization.
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86 *
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87 * @param controller Host context associated with plugin UI, as
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88 * supplied to LV2UI_Descriptor::instantiate().
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89 */
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90 void (*ui_closed)(LV2UI_Controller controller);
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91
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92 /**
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93 * Optional (may be NULL) "user friendly" identifier which the UI
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94 * may display to allow a user to easily associate this particular
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95 * UI instance with the correct plugin instance as it is represented
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96 * by the host (e.g. "track 1" or "channel 4").
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97 *
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98 * If supplied by host, the string will be referenced only during
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99 * LV2UI_Descriptor::instantiate()
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100 */
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101 const char * plugin_human_id;
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102
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103 } LV2_External_UI_Host;
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104
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105 #ifdef __cplusplus
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106 } /* extern "C" */
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107 #endif
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108
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109 #endif /* LV2_EXTERNAL_UI_H */