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annotate DPF-Prymula-audioplugins/dpf/dgl/EventHandlers.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) 2012-2022 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 DGL_EVENT_HANDLERS_HPP_INCLUDED
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18 #define DGL_EVENT_HANDLERS_HPP_INCLUDED
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19
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20 #include "Widget.hpp"
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21
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22 START_NAMESPACE_DGL
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23
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24 /* NOTE none of these classes get assigned to a widget automatically
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25 Manual plugging into Widget events is needed, like so:
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26
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27 ```
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28 bool onMouse(const MouseEvent& ev) override
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29 {
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30 return ButtonEventHandler::mouseEvent(ev);
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31 }
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32 ```
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33 */
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34
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35 // --------------------------------------------------------------------------------------------------------------------
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36
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37 class ButtonEventHandler
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38 {
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39 public:
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40 enum State {
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41 kButtonStateDefault = 0x0,
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42 kButtonStateHover = 0x1,
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43 kButtonStateActive = 0x2,
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44 kButtonStateActiveHover = kButtonStateActive|kButtonStateHover
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45 };
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46
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47 class Callback
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48 {
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49 public:
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50 virtual ~Callback() {}
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51 virtual void buttonClicked(SubWidget* widget, int button) = 0;
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52 };
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53
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54 explicit ButtonEventHandler(SubWidget* self);
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55 virtual ~ButtonEventHandler();
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56
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57 bool isActive() noexcept;
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58 void setActive(bool active, bool sendCallback) noexcept;
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59
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60 bool isChecked() const noexcept;
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61 void setChecked(bool checked, bool sendCallback) noexcept;
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62
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63 bool isCheckable() const noexcept;
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64 void setCheckable(bool checkable) noexcept;
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65
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66 Point<double> getLastClickPosition() const noexcept;
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67 Point<double> getLastMotionPosition() const noexcept;
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68
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69 void setCallback(Callback* callback) noexcept;
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70
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71 bool mouseEvent(const Widget::MouseEvent& ev);
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72 bool motionEvent(const Widget::MotionEvent& ev);
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73
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74 protected:
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75 State getState() const noexcept;
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76 void clearState() noexcept;
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77
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78 virtual void stateChanged(State state, State oldState);
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79
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80 void setInternalCallback(Callback* callback) noexcept;
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81 void triggerUserCallback(SubWidget* widget, int button);
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82
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83 private:
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84 struct PrivateData;
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85 PrivateData* const pData;
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86
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87 DISTRHO_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR(ButtonEventHandler)
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88 };
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89
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90 // --------------------------------------------------------------------------------------------------------------------
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91
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92 class KnobEventHandler
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93 {
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94 public:
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95 enum Orientation {
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96 Horizontal,
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97 Vertical,
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98 Both
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99 };
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100
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101 // NOTE hover not implemented yet
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102 enum State {
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103 kKnobStateDefault = 0x0,
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104 kKnobStateHover = 0x1,
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105 kKnobStateDragging = 0x2,
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106 kKnobStateDraggingHover = kKnobStateDragging|kKnobStateHover
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107 };
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108
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109 class Callback
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110 {
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111 public:
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112 virtual ~Callback() {}
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113 virtual void knobDragStarted(SubWidget* widget) = 0;
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114 virtual void knobDragFinished(SubWidget* widget) = 0;
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115 virtual void knobValueChanged(SubWidget* widget, float value) = 0;
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116 virtual void knobDoubleClicked(SubWidget*) {};
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117 };
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118
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119 explicit KnobEventHandler(SubWidget* self);
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120 explicit KnobEventHandler(SubWidget* self, const KnobEventHandler& other);
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121 KnobEventHandler& operator=(const KnobEventHandler& other);
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122 virtual ~KnobEventHandler();
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123
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124 // if setStep(1) has been called before, this returns true
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125 bool isInteger() const noexcept;
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126
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127 // returns raw value, is assumed to be scaled if using log
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128 float getValue() const noexcept;
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129
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130 // NOTE: value is assumed to be scaled if using log
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131 virtual bool setValue(float value, bool sendCallback = false) noexcept;
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132
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133 // returns 0-1 ranged value, already with log scale as needed
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134 float getNormalizedValue() const noexcept;
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135
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136 // NOTE: value is assumed to be scaled if using log
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137 void setDefault(float def) noexcept;
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138
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139 // NOTE: value is assumed to be scaled if using log
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140 void setRange(float min, float max) noexcept;
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141
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142 void setStep(float step) noexcept;
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143
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144 void setUsingLogScale(bool yesNo) noexcept;
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145
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146 Orientation getOrientation() const noexcept;
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147 void setOrientation(Orientation orientation) noexcept;
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148
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149 void setCallback(Callback* callback) noexcept;
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150
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151 // default 200, higher means slower
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152 void setMouseDeceleration(float accel) noexcept;
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153
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154 bool mouseEvent(const Widget::MouseEvent& ev, double scaleFactor = 1.0);
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155 bool motionEvent(const Widget::MotionEvent& ev, double scaleFactor = 1.0);
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156 bool scrollEvent(const Widget::ScrollEvent& ev);
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157
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158 protected:
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159 State getState() const noexcept;
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160
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161 private:
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162 struct PrivateData;
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163 PrivateData* const pData;
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164
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165 /* not for use */
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166 #ifdef DISTRHO_PROPER_CPP11_SUPPORT
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167 KnobEventHandler(KnobEventHandler& other) = delete;
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168 KnobEventHandler(const KnobEventHandler& other) = delete;
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169 #else
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170 KnobEventHandler(KnobEventHandler& other);
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171 KnobEventHandler(const KnobEventHandler& other);
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172 #endif
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173
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174 DISTRHO_LEAK_DETECTOR(KnobEventHandler)
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175 };
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176
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177 // --------------------------------------------------------------------------------------------------------------------
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178
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179 class SliderEventHandler
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180 {
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181 public:
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182 explicit SliderEventHandler(SubWidget* self);
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183 virtual ~SliderEventHandler();
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184
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185 private:
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186 struct PrivateData;
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187 PrivateData* const pData;
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188
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189 DISTRHO_LEAK_DETECTOR(SliderEventHandler)
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190 };
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191
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192 // --------------------------------------------------------------------------------------------------------------------
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193
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194 END_NAMESPACE_DGL
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195
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196 #endif // DGL_EVENT_HANDLERS_HPP_INCLUDED
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197