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annotate libgui/graphics/Canvas.h @ 31645:bd9da634f00d

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maint: Merge stable to default.
author John W. Eaton <jwe@octave.org>
date Tue, 06 Dec 2022 15:17:16 -0500
parents ca7d58406f82 9089bd969b37
children 431f80aba37a
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1 ////////////////////////////////////////////////////////////////////////
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2 //
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3 // Copyright (C) 2011-2022 The Octave Project Developers
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4 //
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5 // See the file COPYRIGHT.md in the top-level directory of this
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6 // distribution or <https://octave.org/copyright/>.
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7 //
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8 // This file is part of Octave.
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9 //
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10 // Octave is free software: you can redistribute it and/or modify it
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11 // under the terms of the GNU General Public License as published by
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12 // the Free Software Foundation, either version 3 of the License, or
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13 // (at your option) any later version.
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14 //
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15 // Octave is distributed in the hope that it will be useful, but
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16 // WITHOUT ANY WARRANTY; without even the implied warranty of
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17 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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18 // GNU General Public License for more details.
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19 //
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20 // You should have received a copy of the GNU General Public License
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21 // along with Octave; see the file COPYING. If not, see
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22 // <https://www.gnu.org/licenses/>.
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23 //
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24 ////////////////////////////////////////////////////////////////////////
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25
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26 #if ! defined (octave_Canvas_h)
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27 #define octave_Canvas_h 1
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28
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29 #include <QObject>
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30 #include <QPoint>
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31
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32 #include "event-manager.h"
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33 #include "graphics.h"
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34
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35 #include "Figure.h"
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36
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37 class QKeyEvent;
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38 class QMouseEvent;
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39 class QWheelEvent;
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40 class QWidget;
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41
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42 class octave_value_list;
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43
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44 namespace octave
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45 {
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46 class interpreter;
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47
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48 class Canvas : public QObject
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49 {
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50 Q_OBJECT
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51
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52 public:
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53 enum EventMask
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54 {
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55 KeyPress = 0x01,
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56 KeyRelease = 0x02
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57 };
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58
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59 public:
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60 virtual ~Canvas (void) = default;
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61
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62 void redraw (bool sync = false);
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63 void blockRedraw (bool block = true);
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64
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65 void print (const QString& file_cmd, const QString& term)
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66 {
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67 do_print (file_cmd, term, m_handle);
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68 }
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69
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70 void addEventMask (int m) { m_eventMask |= m; }
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71 void clearEventMask (int m) { m_eventMask &= (~m); }
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72 void setEventMask (int m) { m_eventMask = m; }
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73
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74 void setCursor (MouseMode mode, std::string fallback,
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75 QImage cdata, Matrix hotspot);
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76
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77 virtual QWidget * qWidget (void) = 0;
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78
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79 static Canvas *
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80 create (octave::interpreter& interp, const graphics_handle& handle,
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81 QWidget *parent, const std::string& name);
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82
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83 virtual uint8NDArray getPixels (void) { return do_getPixels (m_handle); };
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84
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85 signals:
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86
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87 void interpreter_event (const octave::fcn_callback& fcn);
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88 void interpreter_event (const octave::meth_callback& meth);
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89
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90 void gh_callback_event (const graphics_handle& h, const std::string& name);
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91
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92 void gh_callback_event (const graphics_handle& h, const std::string& name,
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93 const octave_value& data);
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94
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95 void gh_set_event (const graphics_handle& h, const std::string& name,
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96 const octave_value& value);
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97
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98 void gh_set_event (const graphics_handle& h, const std::string& name,
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99 const octave_value& value, bool notify_toolkit);
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100
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101 void gh_set_event (const graphics_handle& h, const std::string& name,
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102 const octave_value& value, bool notify_toolkit,
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103 bool redraw_figure);
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104 protected:
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105 virtual void draw (const graphics_handle& handle) = 0;
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106 virtual void drawZoomBox (const QPoint& p1, const QPoint& p2) = 0;
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107 virtual void resize (int x, int y, int width, int height) = 0;
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108 virtual graphics_object selectFromAxes (const graphics_object& ax,
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109 const QPoint& pt) = 0;
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110 virtual uint8NDArray do_getPixels (const graphics_handle& handle) = 0;
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111 virtual void do_print (const QString& file_cmd, const QString& term,
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112 const graphics_handle& handle) = 0;
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113
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114 protected:
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115 Canvas (octave::interpreter& interp, const graphics_handle& handle)
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116 : m_interpreter (interp),
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117 m_handle (handle),
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118 m_redrawBlocked (false),
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119 m_mouseMode (NoMode),
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120 m_clickMode (false),
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121 m_eventMask (0),
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122 m_rectMode (false)
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123 { }
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124
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125 void canvasToggleAxes (const graphics_handle& handle);
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126 void canvasToggleGrid (const graphics_handle& handle);
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127 void canvasAutoAxes (const graphics_handle& handle);
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128 void canvasPaintEvent (void);
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129 void canvasMouseDoubleClickEvent (QMouseEvent *event);
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130 void canvasMouseMoveEvent (QMouseEvent *event);
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131 void canvasMousePressEvent (QMouseEvent *event);
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132 void canvasMouseReleaseEvent (QMouseEvent *event);
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133 void canvasWheelEvent (QWheelEvent *event);
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134 bool canvasKeyPressEvent (QKeyEvent *event);
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135 bool canvasKeyReleaseEvent (QKeyEvent *event);
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136
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137 void updateCurrentPoint (const graphics_object& fig,
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138 const graphics_object& obj, QMouseEvent *event);
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139 void updateCurrentPoint (const graphics_object& fig,
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140 const graphics_object& obj);
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141
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142 void select_object (graphics_object obj, QMouseEvent *event,
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143 graphics_object& currentObj, graphics_object& axesObj,
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144 bool axes_only = false,
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145 std::vector<std::string> omit = std::vector<std::string> ());
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146
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147 protected:
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148
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149 octave::interpreter& m_interpreter;
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150
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151 private:
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152
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153 QCursor make_cursor (const QString& name, int hot_x = -1, int hot_y = -1);
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154
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155 graphics_handle m_handle;
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156 bool m_redrawBlocked;
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157 MouseMode m_mouseMode;
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158 bool m_clickMode; // True: ZoomIn, False: ZoomOut
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159 QPoint m_mouseAnchor;
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160 QPoint m_mouseCurrent;
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161 graphics_handle m_mouseAxes;
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162 int m_eventMask;
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163 bool m_rectMode;
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164 };
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165
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166 }
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167
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168 #endif