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annotate DPF-Prymula-audioplugins/dpf/distrho/DistrhoUI.hpp @ 3:84e66ea83026

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DPF-Prymula-audioplugins-0.231015-2
author prymula <prymula76@outlook.com>
date Mon, 16 Oct 2023 21:53:34 +0200
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children
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3
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1 /*
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2 * DISTRHO Plugin Framework (DPF)
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3 * Copyright (C) 2012-2023 Filipe Coelho <falktx@falktx.com>
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4 *
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5 * Permission to use, copy, modify, and/or distribute this software for any purpose with
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6 * or without fee is hereby granted, provided that the above copyright notice and this
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7 * permission notice appear in all copies.
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8 *
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9 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH REGARD
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10 * TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN
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11 * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
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12 * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER
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13 * IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
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14 * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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15 */
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16
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17 #ifndef DISTRHO_UI_HPP_INCLUDED
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18 #define DISTRHO_UI_HPP_INCLUDED
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19
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20 #include "DistrhoDetails.hpp"
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21 #include "extra/LeakDetector.hpp"
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22 #include "src/DistrhoPluginChecks.h"
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23
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24 #ifdef DGL_CAIRO
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25 # include "Cairo.hpp"
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26 #endif
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27 #ifdef DGL_OPENGL
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28 # include "OpenGL.hpp"
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29 #endif
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30 #ifdef DGL_VULKAN
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31 # include "Vulkan.hpp"
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32 #endif
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33
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34 #if DISTRHO_PLUGIN_HAS_EXTERNAL_UI
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35 # include "../dgl/Base.hpp"
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36 # include "extra/ExternalWindow.hpp"
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37 typedef DISTRHO_NAMESPACE::ExternalWindow UIWidget;
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38 #elif DISTRHO_UI_USE_CUSTOM
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39 # include DISTRHO_UI_CUSTOM_INCLUDE_PATH
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40 typedef DISTRHO_UI_CUSTOM_WIDGET_TYPE UIWidget;
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41 #elif DISTRHO_UI_USE_CAIRO
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42 # include "../dgl/Cairo.hpp"
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43 typedef DGL_NAMESPACE::CairoTopLevelWidget UIWidget;
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44 #elif DISTRHO_UI_USE_NANOVG
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45 # include "../dgl/NanoVG.hpp"
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46 typedef DGL_NAMESPACE::NanoTopLevelWidget UIWidget;
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47 #else
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48 # include "../dgl/TopLevelWidget.hpp"
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49 typedef DGL_NAMESPACE::TopLevelWidget UIWidget;
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50 #endif
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51
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52 #if DISTRHO_UI_FILE_BROWSER
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53 # include "extra/FileBrowserDialog.hpp"
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54 #endif
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55 #if !DISTRHO_PLUGIN_HAS_EXTERNAL_UI
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56 # include <vector>
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57 #endif
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58
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59 START_NAMESPACE_DISTRHO
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60
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61 class PluginWindow;
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62
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63 /* ------------------------------------------------------------------------------------------------------------
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64 * DPF UI */
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65
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66 /**
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67 @addtogroup MainClasses
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68 @{
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69 */
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70
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71 /**
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72 DPF UI class from where UI instances are created.
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73
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74 @note You must call setSize during construction,
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75 @TODO Detailed information about this class.
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76 */
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77 class UI : public UIWidget
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78 {
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79 public:
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80 /**
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81 UI class constructor.
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82 The UI should be initialized to a default state that matches the plugin side.
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83
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84 When @a automaticallyScale is set to true, DPF will automatically scale up the UI
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85 to fit the host/desktop scale factor.@n
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86 It assumes aspect ratio is meant to be kept.
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87 Manually call setGeometryConstraints instead if keeping UI aspect ratio is not required.
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88 */
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89 UI(uint width = 0, uint height = 0, bool automaticallyScaleAndSetAsMinimumSize = false);
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90
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91 /**
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92 Destructor.
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93 */
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94 ~UI() override;
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95
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96 /* --------------------------------------------------------------------------------------------------------
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97 * Host state */
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98
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99 /**
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100 Check if this UI window is resizable (by the user or window manager).
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101 There are situations where an UI supports resizing but the plugin host does not, so this could return false.
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102
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103 You might want to add a resize handle for such cases, so the user is still allowed to resize the window.
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104 (programatically resizing a window is always possible, but the same is not true for the window manager)
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105 */
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106 bool isResizable() const noexcept;
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107
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108 /**
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109 Get the color used for UI background (i.e. window color) in RGBA format.
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110 Returns 0 by default, in case of error or lack of host support.
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111
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112 The following example code can be use to extract individual colors:
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113 ```
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114 const int red = (bgColor >> 24) & 0xff;
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115 const int green = (bgColor >> 16) & 0xff;
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116 const int blue = (bgColor >> 8) & 0xff;
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117 ```
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118 */
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119 uint getBackgroundColor() const noexcept;
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120
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121 /**
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122 Get the color used for UI foreground (i.e. text color) in RGBA format.
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123 Returns 0xffffffff by default, in case of error or lack of host support.
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124
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125 The following example code can be use to extract individual colors:
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126 ```
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127 const int red = (fgColor >> 24) & 0xff;
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128 const int green = (fgColor >> 16) & 0xff;
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129 const int blue = (fgColor >> 8) & 0xff;
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130 ```
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131 */
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132 uint getForegroundColor() const noexcept;
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133
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134 /**
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135 Get the current sample rate used in plugin processing.
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136 @see sampleRateChanged(double)
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137 */
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138 double getSampleRate() const noexcept;
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139
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140 /**
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141 Get the bundle path where the UI resides.@n
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142 Can return null if the UI is not available in a bundle (if it is a single binary).
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143 @see getBinaryFilename
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144 */
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145 const char* getBundlePath() const noexcept;
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146
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147 /**
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148 editParameter.
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149
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150 Touch/pressed-down event.
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151 Lets the host know the user is tweaking a parameter.
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152 Required in some hosts to record automation.
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153 */
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154 void editParameter(uint32_t index, bool started);
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155
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156 /**
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157 setParameterValue.
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158
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159 Change a parameter value in the Plugin.
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160 */
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161 void setParameterValue(uint32_t index, float value);
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162
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163 #if DISTRHO_PLUGIN_WANT_STATE
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164 /**
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165 setState.
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166 @TODO Document this.
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167 */
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168 void setState(const char* key, const char* value);
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169
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170 /**
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171 Request a new file from the host, matching the properties of a state key.@n
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172 This will use the native host file browser if available, otherwise a DPF built-in file browser is used.@n
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173 Response will be sent asynchronously to stateChanged, with the matching key and the new file as the value.@n
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174 It is not possible to know if the action was cancelled by the user.
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175
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176 @return Success if a file-browser was opened, otherwise false.
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177 @note You cannot request more than one file at a time.
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178 */
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179 bool requestStateFile(const char* key);
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180 #endif
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181
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182 #if DISTRHO_PLUGIN_WANT_MIDI_INPUT
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183 /**
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
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184 Send a single MIDI note from the UI to the plugin DSP side.@n
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185 A note with zero velocity will be sent as note-off (MIDI 0x80), otherwise note-on (MIDI 0x90).
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186 */
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187 void sendNote(uint8_t channel, uint8_t note, uint8_t velocity);
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188 #endif
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189
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190 #if DISTRHO_UI_FILE_BROWSER
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parents:
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191 /**
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192 Open a file browser dialog with this window as transient parent.@n
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parents:
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193 A few options can be specified to setup the dialog.
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194
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195 If a path is selected, onFileSelected() will be called with the user chosen path.
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196 If the user cancels or does not pick a file, onFileSelected() will be called with nullptr as filename.
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197
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198 This function does not block the event loop.
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199
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200 @note This is exactly the same API as provided by the Window class,
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parents:
diff changeset
201 but redeclared here so that non-embed/DGL based UIs can still use file browser related functions.
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parents:
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202 */
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parents:
diff changeset
203 bool openFileBrowser(const DISTRHO_NAMESPACE::FileBrowserOptions& options = FileBrowserOptions());
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diff changeset
204 #endif
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parents:
diff changeset
205
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parents:
diff changeset
206 #if DISTRHO_PLUGIN_WANT_DIRECT_ACCESS
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207 /* --------------------------------------------------------------------------------------------------------
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parents:
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208 * Direct DSP access - DO NOT USE THIS UNLESS STRICTLY NECESSARY!! */
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209
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210 /**
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prymula <prymula76@outlook.com>
parents:
diff changeset
211 getPluginInstancePointer.
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diff changeset
212 @TODO Document this.
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diff changeset
213 */
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parents:
diff changeset
214 void* getPluginInstancePointer() const noexcept;
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parents:
diff changeset
215 #endif
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parents:
diff changeset
216
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217 #if DISTRHO_PLUGIN_HAS_EXTERNAL_UI
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parents:
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218 /* --------------------------------------------------------------------------------------------------------
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parents:
diff changeset
219 * External UI helpers */
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diff changeset
220
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parents:
diff changeset
221 /**
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parents:
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222 Get the bundle path that will be used for the next UI.
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parents:
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223 @note: This function is only valid during createUI(),
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parents:
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224 it will return null when called from anywhere else.
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parents:
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225 */
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parents:
diff changeset
226 static const char* getNextBundlePath() noexcept;
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diff changeset
227
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diff changeset
228 /**
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diff changeset
229 Get the scale factor that will be used for the next UI.
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parents:
diff changeset
230 @note: This function is only valid during createUI(),
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parents:
diff changeset
231 it will return 1.0 when called from anywhere else.
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parents:
diff changeset
232 */
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parents:
diff changeset
233 static double getNextScaleFactor() noexcept;
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
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parents:
diff changeset
234
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parents:
diff changeset
235 # if DISTRHO_PLUGIN_HAS_EMBED_UI
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parents:
diff changeset
236 /**
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
237 Get the Window Id that will be used for the next created window.
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parents:
diff changeset
238 @note: This function is only valid during createUI(),
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parents:
diff changeset
239 it will return 0 when called from anywhere else.
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parents:
diff changeset
240 */
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
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parents:
diff changeset
241 static uintptr_t getNextWindowId() noexcept;
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parents:
diff changeset
242 # endif
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
243 #endif
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
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parents:
diff changeset
244
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
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parents:
diff changeset
245 protected:
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
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parents:
diff changeset
246 /* --------------------------------------------------------------------------------------------------------
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247 * DSP/Plugin Callbacks */
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248
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249 /**
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250 A parameter has changed on the plugin side.@n
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251 This is called by the host to inform the UI about parameter changes.
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252 */
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253 virtual void parameterChanged(uint32_t index, float value) = 0;
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254
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255 #if DISTRHO_PLUGIN_WANT_PROGRAMS
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256 /**
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257 A program has been loaded on the plugin side.@n
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258 This is called by the host to inform the UI about program changes.
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259 */
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260 virtual void programLoaded(uint32_t index) = 0;
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261 #endif
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262
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263 #if DISTRHO_PLUGIN_WANT_STATE
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264 /**
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265 A state has changed on the plugin side.@n
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266 This is called by the host to inform the UI about state changes.
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267 */
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268 virtual void stateChanged(const char* key, const char* value) = 0;
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269 #endif
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270
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271 /* --------------------------------------------------------------------------------------------------------
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272 * DSP/Plugin Callbacks (optional) */
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273
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274 /**
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275 Optional callback to inform the UI about a sample rate change on the plugin side.
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276 @see getSampleRate()
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277 */
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278 virtual void sampleRateChanged(double newSampleRate);
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279
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280 /* --------------------------------------------------------------------------------------------------------
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281 * UI Callbacks (optional) */
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282
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283 /**
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284 UI idle function, called to give idle time to the plugin UI directly from the host.
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285 This is called right after OS event handling and Window idle events (within the same cycle).
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286 There are no guarantees in terms of timing.
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287 @see addIdleCallback(IdleCallback*, uint).
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288 */
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289 virtual void uiIdle() {}
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290
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291 /**
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292 Window scale factor function, called when the scale factor changes.
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293 This function is for plugin UIs to be able to override Window::onScaleFactorChanged(double).
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294
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295 The default implementation does nothing.
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296 WARNING function needs a proper name
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297 */
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298 virtual void uiScaleFactorChanged(double scaleFactor);
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299
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300 #if !DISTRHO_PLUGIN_HAS_EXTERNAL_UI
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301 /**
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302 Get the types available for the data in a clipboard.
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303 Must only be called within the context of uiClipboardDataOffer.
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304 */
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305 std::vector<DGL_NAMESPACE::ClipboardDataOffer> getClipboardDataOfferTypes();
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306
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307 /**
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diff changeset
308 Window clipboard data offer function, called when clipboard has data present, possibly with several datatypes.
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309 While handling this event, the data types can be investigated with getClipboardDataOfferTypes() to decide whether to accept the offer.
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310
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311 Reimplement and return a non-zero id to accept the clipboard data offer for a particular type.
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312 UIs must ignore any type they do not recognize.
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313
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314 The default implementation accepts the "text/plain" mimetype.
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315 */
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316 virtual uint32_t uiClipboardDataOffer();
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317
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318 /**
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319 Windows focus function, called when the window gains or loses the keyboard focus.
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320 This function is for plugin UIs to be able to override Window::onFocus(bool, CrossingMode).
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diff changeset
321
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322 The default implementation does nothing.
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323 */
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diff changeset
324 virtual void uiFocus(bool focus, DGL_NAMESPACE::CrossingMode mode);
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325
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326 /**
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327 Window reshape function, called when the window is resized.
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328 This function is for plugin UIs to be able to override Window::onReshape(uint, uint).
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329
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330 The plugin UI size will be set right after this function.
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331 The default implementation sets up the drawing context where necessary.
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332
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333 You should almost never need to override this function.
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parents:
diff changeset
334 The most common exception is custom OpenGL setup, but only really needed for custom OpenGL drawing code.
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335 */
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diff changeset
336 virtual void uiReshape(uint width, uint height);
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diff changeset
337 #endif // !DISTRHO_PLUGIN_HAS_EXTERNAL_UI
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diff changeset
338
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339 #if DISTRHO_UI_FILE_BROWSER
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340 /**
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341 Window file selected function, called when a path is selected by the user, as triggered by openFileBrowser().
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342 This function is for plugin UIs to be able to override Window::onFileSelected(const char*).
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343
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344 This action happens after the user confirms the action, so the file browser dialog will be closed at this point.
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345 The default implementation does nothing.
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diff changeset
346
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347 If you need to use files as plugin state, please setup and use states with kStateIsFilenamePath instead.
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348 */
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diff changeset
349 virtual void uiFileBrowserSelected(const char* filename);
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diff changeset
350 #endif
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351
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352 /* --------------------------------------------------------------------------------------------------------
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parents:
diff changeset
353 * UI Resize Handling, internal */
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diff changeset
354
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355 #if DISTRHO_PLUGIN_HAS_EXTERNAL_UI
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diff changeset
356 /**
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diff changeset
357 External Window resize function, called when the window is resized.
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parents:
diff changeset
358 This is overriden here so the host knows when the UI is resized by you.
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parents:
diff changeset
359 @see ExternalWindow::sizeChanged(uint,uint)
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360 */
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parents:
diff changeset
361 void sizeChanged(uint width, uint height) override;
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parents:
diff changeset
362 #else
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parents:
diff changeset
363 /**
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parents:
diff changeset
364 Widget resize function, called when the widget is resized.
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parents:
diff changeset
365 This is overriden here so the host knows when the UI is resized by you.
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parents:
diff changeset
366 @see Widget::onResize(const ResizeEvent&)
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parents:
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367 */
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parents:
diff changeset
368 void onResize(const ResizeEvent& ev) override;
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parents:
diff changeset
369 #endif
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370
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371 // -------------------------------------------------------------------------------------------------------
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372
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373 private:
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374 struct PrivateData;
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375 PrivateData* const uiData;
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376 friend class PluginWindow;
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377 friend class UIExporter;
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378 #if !DISTRHO_PLUGIN_HAS_EXTERNAL_UI
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379 /** @internal */
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380 void requestSizeChange(uint width, uint height) override;
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381 #endif
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382
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383 DISTRHO_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR(UI)
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384 };
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385
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386 /** @} */
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387
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388 /* ------------------------------------------------------------------------------------------------------------
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389 * Create UI, entry point */
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390
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391 /**
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392 @addtogroup EntryPoints
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393 @{
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394 */
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395
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396 /**
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397 createUI.
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398 @TODO Document this.
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399 */
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400 extern UI* createUI();
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401
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402 /** @} */
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403
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404 // -----------------------------------------------------------------------------------------------------------
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405
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406 END_NAMESPACE_DISTRHO
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407
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408 #endif // DISTRHO_UI_HPP_INCLUDED