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annotate DPF-Prymula-audioplugins/dpf/dgl/SubWidget.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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3
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1 /*
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2 * DISTRHO Plugin Framework (DPF)
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3 * Copyright (C) 2012-2021 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_SUBWIDGET_HPP_INCLUDED
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18 #define DGL_SUBWIDGET_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 // --------------------------------------------------------------------------------------------------------------------
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25
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26 /**
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27 Sub-Widget class.
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28
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29 This class is the main entry point for creating any reusable widgets from within DGL.
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30 It can be freely positioned from within a parent widget, thus being named subwidget.
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31
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32 Many subwidgets can share the same parent, and subwidgets themselves can also have its own subwidgets.
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33 It is subwidgets all the way down.
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34
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35 TODO check absolute vs relative position and see what makes more sense.
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36
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37 @see CairoSubWidget
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38 */
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39 class SubWidget : public Widget
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40 {
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41 public:
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42 /**
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43 Constructor.
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44 */
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45 explicit SubWidget(Widget* parentWidget);
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46
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47 /**
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48 Destructor.
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49 */
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50 ~SubWidget() override;
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51
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52 /**
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53 Check if this widget contains the point defined by @a x and @a y.
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54 */
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55 // TODO rename as containsRelativePos
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56 template<typename T>
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57 bool contains(T x, T y) const noexcept;
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58
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59 /**
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60 Check if this widget contains the point @a pos.
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61 */
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62 // TODO rename as containsRelativePos
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63 template<typename T>
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64 bool contains(const Point<T>& pos) const noexcept;
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65
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66 /**
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67 Get absolute X.
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68 */
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69 int getAbsoluteX() const noexcept;
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70
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71 /**
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72 Get absolute Y.
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73 */
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74 int getAbsoluteY() const noexcept;
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75
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76 /**
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77 Get absolute position.
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78 */
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79 Point<int> getAbsolutePos() const noexcept;
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80
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81 /**
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82 Get absolute area of this subwidget.
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83 This is the same as `Rectangle<int>(getAbsolutePos(), getSize());`
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84 @see getConstrainedAbsoluteArea()
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85 */
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86 Rectangle<int> getAbsoluteArea() const noexcept;
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87
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88 /**
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89 Get absolute area of this subwidget, with special consideration for not allowing negative values.
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90 @see getAbsoluteArea()
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91 */
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92 Rectangle<uint> getConstrainedAbsoluteArea() const noexcept;
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93
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94 /**
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95 Set absolute X.
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96 */
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97 void setAbsoluteX(int x) noexcept;
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98
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99 /**
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100 Set absolute Y.
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101 */
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102 void setAbsoluteY(int y) noexcept;
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103
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104 /**
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105 Set absolute position using @a x and @a y values.
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106 */
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107 void setAbsolutePos(int x, int y) noexcept;
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108
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109 /**
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110 Set absolute position.
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111 */
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112 void setAbsolutePos(const Point<int>& pos) noexcept;
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113
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114 /**
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115 Get the margin currently in use for widget coordinates.
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116 By default this value is (0,0).
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117 */
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118 Point<int> getMargin() const noexcept;
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119
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120 /**
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121 Set a margin to be used for widget coordinates using @a x and @a y values.
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122 */
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123 void setMargin(int x, int y) noexcept;
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124
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125 /**
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126 Set a margin to be used for widget coordinates.
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127 */
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128 void setMargin(const Point<int>& offset) noexcept;
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129
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130 /**
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131 Get parent Widget, as passed in the constructor.
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132 */
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133 Widget* getParentWidget() const noexcept;
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134
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135 /**
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136 Request repaint of this subwidget's area to the window this widget belongs to.
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137 */
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138 void repaint() noexcept override;
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139
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140 /**
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141 Pushes this widget to the "bottom" of the parent widget.
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142 Makes the widget behave as if it was the first to be registered on the parent widget, thus being "on bottom".
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143 */
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144 virtual void toBottom();
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145
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146 /**
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147 Bring this widget to the "front" of the parent widget.
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148 Makes the widget behave as if it was the last to be registered on the parent widget, thus being "in front".
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149 */
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150 virtual void toFront();
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151
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152 /**
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153 Indicate that this subwidget will draw out of bounds, and thus needs the entire viewport available for drawing.
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154 */
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155 void setNeedsFullViewportDrawing(bool needsFullViewportForDrawing = true);
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156
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157 /**
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158 Indicate that this subwidget will always draw at its own internal size and needs scaling to fit target size.
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159 */
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160 void setNeedsViewportScaling(bool needsViewportScaling = true, double autoScaleFactor = 0.0);
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161
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162 /**
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163 Indicate that this subwidget should not be drawn on screen, typically because it is managed by something else.
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164 */
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165 void setSkipDrawing(bool skipDrawing = true);
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166
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167 protected:
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168 /**
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169 A function called when the subwidget's absolute position is changed.
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170 */
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171 virtual void onPositionChanged(const PositionChangedEvent&);
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172
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173 private:
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174 struct PrivateData;
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175 PrivateData* const pData;
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176 friend class Widget;
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177 DISTRHO_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR(SubWidget)
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178 };
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179
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180 // --------------------------------------------------------------------------------------------------------------------
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181
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182 END_NAMESPACE_DGL
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183
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184 #endif // DGL_SUBWIDGET_HPP_INCLUDED
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185