Mercurial > hg > orthanc-stone
annotate Framework/Deprecated/Widgets/PanZoomMouseTracker.cpp @ 1510:1005c1cbe4dd
fix
author | Sebastien Jodogne <s.jodogne@gmail.com> |
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date | Tue, 07 Jul 2020 09:45:27 +0200 |
parents | 30deba7bc8e2 |
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rev | line source |
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1 /** |
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2 * Stone of Orthanc |
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3 * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics |
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4 * Department, University Hospital of Liege, Belgium |
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5 * Copyright (C) 2017-2020 Osimis S.A., Belgium |
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6 * |
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7 * This program is free software: you can redistribute it and/or |
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8 * modify it under the terms of the GNU Affero General Public License |
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9 * as published by the Free Software Foundation, either version 3 of |
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10 * the License, or (at your option) any later version. |
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11 * |
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12 * This program is distributed in the hope that it will be useful, but |
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13 * WITHOUT ANY WARRANTY; without even the implied warranty of |
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14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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15 * Affero General Public License for more details. |
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16 * |
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17 * You should have received a copy of the GNU Affero General Public License |
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18 * along with this program. If not, see <http://www.gnu.org/licenses/>. |
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19 **/ |
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20 |
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21 |
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22 #include "PanZoomMouseTracker.h" |
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23 |
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24 #include <Logging.h> |
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25 #include <OrthancException.h> |
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26 #include <math.h> |
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27 |
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28 namespace Deprecated |
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29 { |
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30 Touch GetCenter(const std::vector<Touch>& touches) |
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31 { |
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32 return Touch((touches[0].x + touches[1].x) / 2.0f, (touches[0].y + touches[1].y) / 2.0f); |
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33 } |
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34 |
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35 double GetDistance(const std::vector<Touch>& touches) |
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36 { |
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37 float dx = touches[0].x - touches[1].x; |
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38 float dy = touches[0].y - touches[1].y; |
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39 return sqrt((double)(dx * dx) + (double)(dy * dy)); |
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40 } |
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41 |
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42 |
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43 PanZoomMouseTracker::PanZoomMouseTracker(WorldSceneWidget& that, |
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44 const std::vector<Touch>& startTouches) |
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45 : that_(that), |
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46 originalZoom_(that.GetView().GetZoom()) |
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47 { |
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48 that.GetView().GetPan(originalPanX_, originalPanY_); |
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49 that.GetView().MapPixelCenterToScene(originalSceneTouches_, startTouches); |
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50 |
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51 originalDisplayCenter_ = GetCenter(startTouches); |
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52 originalSceneCenter_ = GetCenter(originalSceneTouches_); |
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53 originalDisplayDistanceBetweenTouches_ = GetDistance(startTouches); |
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54 |
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55 // printf("original Pan %f %f\n", originalPanX_, originalPanY_); |
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56 // printf("original Zoom %f \n", originalZoom_); |
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57 // printf("original distance %f \n", (float)originalDisplayDistanceBetweenTouches_); |
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58 // printf("original display touches 0 %f %f\n", startTouches[0].x, startTouches[0].y); |
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59 // printf("original display touches 1 %f %f\n", startTouches[1].x, startTouches[1].y); |
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60 // printf("original Scene center %f %f\n", originalSceneCenter_.x, originalSceneCenter_.y); |
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61 |
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62 unsigned int height = that.GetView().GetDisplayHeight(); |
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63 |
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64 if (height <= 3) |
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65 { |
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66 idle_ = true; |
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67 LOG(WARNING) << "image is too small to zoom (current height = " << height << ")"; |
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68 } |
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69 else |
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70 { |
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71 idle_ = false; |
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72 normalization_ = 1.0 / static_cast<double>(height - 1); |
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73 } |
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74 |
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75 } |
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76 |
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77 |
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78 void PanZoomMouseTracker::Render(OrthancStone::CairoContext& context, |
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79 double zoom) |
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80 { |
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81 throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError); |
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82 } |
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83 |
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84 |
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85 void PanZoomMouseTracker::MouseMove(int displayX, |
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86 int displayY, |
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87 double x, |
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88 double y, |
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89 const std::vector<Touch>& displayTouches, |
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90 const std::vector<Touch>& sceneTouches) |
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91 { |
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92 ViewportGeometry view = that_.GetView(); |
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93 |
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94 // printf("Display touches 0 %f %f\n", displayTouches[0].x, displayTouches[0].y); |
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95 // printf("Display touches 1 %f %f\n", displayTouches[1].x, displayTouches[1].y); |
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96 // printf("Scene touches 0 %f %f\n", sceneTouches[0].x, sceneTouches[0].y); |
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97 // printf("Scene touches 1 %f %f\n", sceneTouches[1].x, sceneTouches[1].y); |
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98 |
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99 // printf("zoom = %f\n", view.GetZoom()); |
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100 Touch currentSceneCenter = GetCenter(sceneTouches); |
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101 double panX = originalPanX_ + (currentSceneCenter.x - originalSceneCenter_.x) * view.GetZoom(); |
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102 double panY = originalPanY_ + (currentSceneCenter.y - originalSceneCenter_.y) * view.GetZoom(); |
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103 |
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104 view.SetPan(panX, panY); |
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105 |
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106 static const double MIN_ZOOM = -4; |
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107 static const double MAX_ZOOM = 4; |
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108 |
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109 if (!idle_) |
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110 { |
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111 double currentDistanceBetweenTouches = GetDistance(displayTouches); |
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112 |
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113 double dy = static_cast<double>(currentDistanceBetweenTouches - originalDisplayDistanceBetweenTouches_) * normalization_; // In the range [-1,1] |
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114 double z; |
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115 |
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116 // Linear interpolation from [-1, 1] to [MIN_ZOOM, MAX_ZOOM] |
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117 if (dy < -1.0) |
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118 { |
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119 z = MIN_ZOOM; |
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120 } |
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121 else if (dy > 1.0) |
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122 { |
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123 z = MAX_ZOOM; |
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124 } |
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125 else |
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126 { |
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127 z = MIN_ZOOM + (MAX_ZOOM - MIN_ZOOM) * (dy + 1.0) / 2.0; |
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128 } |
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129 |
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130 z = pow(2.0, z); |
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131 |
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132 view.SetZoom(z * originalZoom_); |
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133 } |
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134 |
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135 that_.SetView(view); |
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136 } |
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137 } |