--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Framework/Scene2DViewport/LineMeasureTool.cpp	Tue May 21 13:25:58 2019 +0200
@@ -0,0 +1,201 @@
+/**
+ * Stone of Orthanc
+ * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics
+ * Department, University Hospital of Liege, Belgium
+ * Copyright (C) 2017-2019 Osimis S.A., Belgium
+ *
+ * This program is free software: you can redistribute it and/or
+ * modify it under the terms of the GNU Affero General Public License
+ * as published by the Free Software Foundation, either version 3 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ **/
+
+#include "LineMeasureTool.h"
+#include "MeasureToolsToolbox.h"
+
+#include <Core/Logging.h>
+
+
+namespace OrthancStone
+{
+  LineMeasureTool::~LineMeasureTool()
+  {
+    // this measuring tool is a RABI for the corresponding visual layers
+    // stored in the 2D scene
+    Disable();
+    RemoveFromScene();
+  }
+
+  void LineMeasureTool::RemoveFromScene()
+  {
+    if (layersCreated)
+    {
+      assert(GetScene()->HasLayer(polylineZIndex_));
+      assert(GetScene()->HasLayer(textZIndex_));
+      GetScene()->DeleteLayer(polylineZIndex_);
+      GetScene()->DeleteLayer(textZIndex_);
+    }
+  }
+
+
+  void LineMeasureTool::SetStart(ScenePoint2D start)
+  {
+    start_ = start;
+    RefreshScene();
+  }
+
+  void LineMeasureTool::SetEnd(ScenePoint2D end)
+  {
+    end_ = end;
+    RefreshScene();
+  }
+
+  void LineMeasureTool::Set(ScenePoint2D start, ScenePoint2D end)
+  {
+    start_ = start;
+    end_ = end;
+    RefreshScene();
+  }
+
+  PolylineSceneLayer* LineMeasureTool::GetPolylineLayer()
+  {
+    assert(GetScene()->HasLayer(polylineZIndex_));
+    ISceneLayer* layer = &(GetScene()->GetLayer(polylineZIndex_));
+    PolylineSceneLayer* concreteLayer = dynamic_cast<PolylineSceneLayer*>(layer);
+    assert(concreteLayer != NULL);
+    return concreteLayer;
+  }
+
+  TextSceneLayer* LineMeasureTool::GetTextLayer()
+  {
+    assert(GetScene()->HasLayer(textZIndex_));
+    ISceneLayer* layer = &(GetScene()->GetLayer(textZIndex_));
+    TextSceneLayer* concreteLayer = dynamic_cast<TextSceneLayer*>(layer);
+    assert(concreteLayer != NULL);
+    return concreteLayer;
+  }
+
+  void LineMeasureTool::RefreshScene()
+  {
+    if (IsSceneAlive())
+    {
+      if (IsEnabled())
+      {
+        if (!layersCreated)
+        {
+          // Create the layers if need be
+
+          assert(textZIndex_ == -1);
+          {
+            polylineZIndex_ = GetScene()->GetMaxDepth() + 100;
+            //LOG(INFO) << "set polylineZIndex_ to: " << polylineZIndex_;
+            std::auto_ptr<PolylineSceneLayer> layer(new PolylineSceneLayer());
+            GetScene()->SetLayer(polylineZIndex_, layer.release());
+          }
+          {
+            textZIndex_ = GetScene()->GetMaxDepth() + 100;
+            //LOG(INFO) << "set textZIndex_ to: " << textZIndex_;
+            std::auto_ptr<TextSceneLayer> layer(new TextSceneLayer());
+            GetScene()->SetLayer(textZIndex_, layer.release());
+          }
+          layersCreated = true;
+        }
+        else
+        {
+          assert(GetScene()->HasLayer(polylineZIndex_));
+          assert(GetScene()->HasLayer(textZIndex_));
+        }
+        {
+          // Fill the polyline layer with the measurement line
+
+          PolylineSceneLayer* polylineLayer = GetPolylineLayer();
+          polylineLayer->ClearAllChains();
+          polylineLayer->SetColor(0, 223, 21);
+
+          {
+            PolylineSceneLayer::Chain chain;
+            chain.push_back(start_);
+            chain.push_back(end_);
+            polylineLayer->AddChain(chain, false);
+          }
+
+          // handles
+          {
+            //void AddSquare(PolylineSceneLayer::Chain& chain,const Scene2D& scene,const ScenePoint2D& centerS,const double& sideLength)
+
+            {
+              PolylineSceneLayer::Chain chain;
+              AddSquare(chain, *GetScene(), start_, 10.0); //TODO: take DPI into account
+              polylineLayer->AddChain(chain, true);
+            }
+
+            {
+              PolylineSceneLayer::Chain chain;
+              AddSquare(chain, *GetScene(), end_, 10.0); //TODO: take DPI into account
+              polylineLayer->AddChain(chain, true);
+            }
+
+            //ScenePoint2D startC = start_.Apply(GetScene()->GetSceneToCanvasTransform());
+            //double squareSize = 10.0; 
+            //double startHandleLX = startC.GetX() - squareSize/2;
+            //double startHandleTY = startC.GetY() - squareSize / 2;
+            //double startHandleRX = startC.GetX() + squareSize / 2;
+            //double startHandleBY = startC.GetY() + squareSize / 2;
+            //ScenePoint2D startLTC(startHandleLX, startHandleTY);
+            //ScenePoint2D startRTC(startHandleRX, startHandleTY);
+            //ScenePoint2D startRBC(startHandleRX, startHandleBY);
+            //ScenePoint2D startLBC(startHandleLX, startHandleBY);
+
+            //ScenePoint2D startLT = startLTC.Apply(GetScene()->GetCanvasToSceneTransform());
+            //ScenePoint2D startRT = startRTC.Apply(GetScene()->GetCanvasToSceneTransform());
+            //ScenePoint2D startRB = startRBC.Apply(GetScene()->GetCanvasToSceneTransform());
+            //ScenePoint2D startLB = startLBC.Apply(GetScene()->GetCanvasToSceneTransform());
+
+            //PolylineSceneLayer::Chain chain;
+            //chain.push_back(startLT);
+            //chain.push_back(startRT);
+            //chain.push_back(startRB);
+            //chain.push_back(startLB);
+            //polylineLayer->AddChain(chain, true);
+          }
+
+        }
+        {
+          // Set the text layer proporeties
+
+          TextSceneLayer* textLayer = GetTextLayer();
+          double deltaX = end_.GetX() - start_.GetX();
+          double deltaY = end_.GetY() - start_.GetY();
+          double squareDist = deltaX * deltaX + deltaY * deltaY;
+          double dist = sqrt(squareDist);
+          char buf[64];
+          sprintf(buf, "%0.02f units", dist);
+          textLayer->SetText(buf);
+          textLayer->SetColor(0, 223, 21);
+
+          // TODO: for now we simply position the text overlay at the middle
+          // of the measuring segment
+          double midX = 0.5 * (end_.GetX() + start_.GetX());
+          double midY = 0.5 * (end_.GetY() + start_.GetY());
+          textLayer->SetPosition(midX, midY);
+        }
+      }
+      else
+      {
+        if (layersCreated)
+        {
+          RemoveFromScene();
+          layersCreated = false;
+        }
+      }
+    }
+  }
+}
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