--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Framework/Toolbox/ParallelSlicesCursor.cpp	Fri Oct 14 15:34:11 2016 +0200
@@ -0,0 +1,246 @@
+/**
+ * Stone of Orthanc
+ * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics
+ * Department, University Hospital of Liege, Belgium
+ *
+ * This program is free software: you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * In addition, as a special exception, the copyright holders of this
+ * program give permission to link the code of its release with the
+ * OpenSSL project's "OpenSSL" library (or with modified versions of it
+ * that use the same license as the "OpenSSL" library), and distribute
+ * the linked executables. You must obey the GNU General Public License
+ * in all respects for all of the code used other than "OpenSSL". If you
+ * modify file(s) with this exception, you may extend this exception to
+ * your version of the file(s), but you are not obligated to do so. If
+ * you do not wish to do so, delete this exception statement from your
+ * version. If you delete this exception statement from all source files
+ * in the program, then also delete it here.
+ * 
+ * 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
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ **/
+
+
+#include "ParallelSlicesCursor.h"
+
+#include "../Orthanc/Core/OrthancException.h"
+
+namespace OrthancStone
+{
+  size_t ParallelSlicesCursor::GetDefaultSlice()
+  {
+    if (slices_.get() == NULL)
+    {
+      return 0;
+    }
+    else
+    {
+      return slices_->GetSliceCount() / 2;
+    }
+  }
+
+
+  size_t ParallelSlicesCursor::GetSliceCount()
+  {
+    boost::mutex::scoped_lock lock(mutex_);
+
+    if (slices_.get() == NULL)
+    {
+      return 0;
+    }
+    else
+    {
+      return slices_->GetSliceCount();
+    }
+  }
+
+
+  SliceGeometry ParallelSlicesCursor::GetSlice(size_t slice)
+  {
+    boost::mutex::scoped_lock lock(mutex_);
+
+    if (slices_.get() == NULL)
+    {
+      return SliceGeometry();
+    }
+    else
+    {
+      return slices_->GetSlice(slice);
+    }
+  }
+
+
+  void ParallelSlicesCursor::SetGeometry(const ParallelSlices& slices)
+  {
+    boost::mutex::scoped_lock lock(mutex_);
+
+    slices_.reset(new ParallelSlices(slices));
+
+    currentSlice_ = GetDefaultSlice();
+  }
+
+
+  SliceGeometry ParallelSlicesCursor::GetCurrentSlice()
+  {
+    boost::mutex::scoped_lock lock(mutex_);
+
+    if (slices_.get() != NULL &&
+        currentSlice_ < slices_->GetSliceCount())
+    {
+      return slices_->GetSlice(currentSlice_);
+    }
+    else
+    {
+      return SliceGeometry();  // No slice is available, return the canonical geometry
+    }
+  }
+
+
+  bool ParallelSlicesCursor::SetDefaultSlice()
+  {
+    boost::mutex::scoped_lock lock(mutex_);
+
+    size_t slice = GetDefaultSlice();
+
+    if (currentSlice_ != slice)
+    {
+      currentSlice_ = slice;
+      return true;
+    }
+    else
+    {
+      return false;
+    }
+  }
+
+
+  bool ParallelSlicesCursor::ApplyOffset(SliceOffsetMode mode,
+                                         int offset)
+  {
+    boost::mutex::scoped_lock lock(mutex_);
+
+    if (slices_.get() == NULL)
+    {
+      return false;
+    }
+
+    int count = slices_->GetSliceCount();
+    if (count == 0)
+    {
+      return false;
+    }
+
+    int slice;
+    if (static_cast<int>(currentSlice_) >= count)
+    {
+      slice = count - 1;
+    }
+    else
+    {
+      slice = currentSlice_;
+    }
+
+    switch (mode)
+    {
+      case SliceOffsetMode_Absolute:
+      {
+        slice = offset;
+        break;
+      }
+
+      case SliceOffsetMode_Relative:
+      {
+        slice += offset;
+        break;
+      }
+
+      case SliceOffsetMode_Loop:
+      {
+        slice += offset;
+        while (slice < 0)
+        {
+          slice += count;
+        }
+
+        while (slice >= count)
+        {
+          slice -= count;
+        }
+
+        break;
+      }
+
+      default:
+        throw Orthanc::OrthancException(Orthanc::ErrorCode_ParameterOutOfRange);
+    }
+
+    if (slice < 0)
+    {
+      slice = 0;
+    }
+
+    if (slice >= count)
+    {
+      slice = count - 1;
+    }
+
+    if (slice != static_cast<int>(currentSlice_))
+    {
+      currentSlice_ = static_cast<int>(slice);
+      return true;
+    }
+    else
+    {
+      return false;
+    }
+  }
+
+
+  bool ParallelSlicesCursor::ApplyWheelEvent(MouseWheelDirection direction,
+                                             KeyboardModifiers modifiers)
+  {
+    int offset = (modifiers & KeyboardModifiers_Control ? 10 : 1);
+
+    switch (direction)
+    {
+      case MouseWheelDirection_Down:
+        return ApplyOffset(SliceOffsetMode_Relative, -offset);
+
+      case MouseWheelDirection_Up:
+        return ApplyOffset(SliceOffsetMode_Relative, offset);
+
+      default:
+        return false;
+    }
+  }
+
+
+  bool ParallelSlicesCursor::LookupSliceContainingPoint(const Vector& p)
+  {
+    boost::mutex::scoped_lock lock(mutex_);
+
+    size_t slice;
+    double distance;
+
+    if (slices_.get() != NULL &&
+        slices_->ComputeClosestSlice(slice, distance, p))
+    {
+      if (currentSlice_ != slice)
+      {
+        currentSlice_ = slice;
+        return true;
+      }
+    }
+
+    return false;
+  }
+}