--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/OrthancStone/Sources/Scene2DViewport/EditLineMeasureTracker.cpp	Tue Jul 07 16:21:02 2020 +0200
@@ -0,0 +1,112 @@
+/**
+ * Stone of Orthanc
+ * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics
+ * Department, University Hospital of Liege, Belgium
+ * Copyright (C) 2017-2020 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 "EditLineMeasureTracker.h"
+#include "EditLineMeasureCommand.h"
+
+#include "../StoneException.h"
+
+
+namespace OrthancStone
+{
+  EditLineMeasureTracker::EditLineMeasureTracker(
+    boost::shared_ptr<MeasureTool>  measureTool,
+    boost::shared_ptr<IViewport> viewport,
+    const PointerEvent& e)
+    : EditMeasureTracker(viewport, e)
+  {
+    ScenePoint2D scenePos = e.GetMainPosition();
+    {
+      std::unique_ptr<IViewport::ILock> lock(viewport_->Lock());
+      Scene2D& scene = lock->GetController().GetScene();
+      scenePos = e.GetMainPosition().Apply(scene.GetCanvasToSceneTransform());
+    }
+    modifiedZone_ = dynamic_cast<LineMeasureTool&>(*measureTool).LineHitTest(scenePos);
+    command_.reset(new EditLineMeasureCommand(measureTool, viewport));
+  }
+
+  EditLineMeasureTracker::~EditLineMeasureTracker()
+  {
+
+  }
+
+  void EditLineMeasureTracker::PointerMove(const PointerEvent& e)
+  {
+    std::unique_ptr<IViewport::ILock> lock(viewport_->Lock());
+    ViewportController& controller = lock->GetController();
+    Scene2D& scene = controller.GetScene();
+
+    ScenePoint2D scenePos = e.GetMainPosition().Apply(
+      scene.GetCanvasToSceneTransform());
+
+    ScenePoint2D delta = scenePos - GetOriginalClickPosition();
+
+    boost::shared_ptr<LineMeasureToolMemento> memento =
+      boost::dynamic_pointer_cast<LineMeasureToolMemento>(command_->mementoOriginal_);
+
+    ORTHANC_ASSERT(memento.get() != NULL);
+
+    switch (modifiedZone_)
+    {
+    case LineMeasureTool::LineHighlightArea_Start:
+    {
+      ScenePoint2D newStart = memento->start_ + delta;
+      GetCommand()->SetStart(newStart);
+    }
+    break;
+    case LineMeasureTool::LineHighlightArea_End:
+    {
+      ScenePoint2D newEnd = memento->end_ + delta;
+      GetCommand()->SetEnd(newEnd);
+    }
+    break;
+    case LineMeasureTool::LineHighlightArea_Segment:
+    {
+      ScenePoint2D newStart = memento->start_ + delta;
+      ScenePoint2D newEnd = memento->end_ + delta;
+      GetCommand()->SetStart(newStart);
+      GetCommand()->SetEnd(newEnd);
+    }
+    break;
+    default:
+      LOG(WARNING) << "Warning: please retry the measuring tool editing operation!";
+      break;
+    }
+  }
+
+  void EditLineMeasureTracker::PointerUp(const PointerEvent& e)
+  {
+    alive_ = false;
+  }
+
+  void EditLineMeasureTracker::PointerDown(const PointerEvent& e)
+  {
+    LOG(WARNING) << "Additional touches (fingers, pen, mouse buttons...) "
+      "are ignored when the edit line tracker is active";
+  }
+
+  boost::shared_ptr<EditLineMeasureCommand> EditLineMeasureTracker::GetCommand()
+  {
+    boost::shared_ptr<EditLineMeasureCommand> ret = boost::dynamic_pointer_cast<EditLineMeasureCommand>(command_);
+    ORTHANC_ASSERT(ret.get() != NULL, "Internal error in EditLineMeasureTracker::GetCommand()");
+    return ret;
+  }
+
+}