# HG changeset patch
# User Sebastien Jodogne <s.jodogne@gmail.com>
# Date 1496246733 -7200
# Node ID 474d85e7649958dc9f8af8c8026d653ab0ab0d11
# Parent  fcec0ab44054c9829a0d253b58a9fdea168c79f7
mpr

diff -r fcec0ab44054 -r 474d85e76499 Applications/Samples/SingleVolumeApplication.h
--- a/Applications/Samples/SingleVolumeApplication.h	Wed May 31 17:01:18 2017 +0200
+++ b/Applications/Samples/SingleVolumeApplication.h	Wed May 31 18:05:33 2017 +0200
@@ -120,7 +120,7 @@
 
 
       LayerWidget*                        widget_;
-      OrthancVolumeImage*                 volume_;
+      const OrthancVolumeImage*           volume_;
       VolumeProjection                    projection_;
       std::auto_ptr<VolumeImageGeometry>  slices_;
       size_t                              slice_;
diff -r fcec0ab44054 -r 474d85e76499 Framework/Widgets/LayerWidget.cpp
--- a/Framework/Widgets/LayerWidget.cpp	Wed May 31 17:01:18 2017 +0200
+++ b/Framework/Widgets/LayerWidget.cpp	Wed May 31 18:05:33 2017 +0200
@@ -375,6 +375,8 @@
     ResetPendingScene();
     layer->Register(*this);
 
+    ResetChangedLayers();
+
     return index;
   }
 
@@ -435,7 +437,9 @@
     if (LookupLayer(i, source))
     {
       LOG(INFO) << "Geometry ready for layer " << i;
-      layers_[i]->ScheduleLayerCreation(slice_);
+
+      changedLayers_[i] = true;
+      //layers_[i]->ScheduleLayerCreation(slice_);
     }
   }
   
@@ -451,7 +455,9 @@
     for (size_t i = 0; i < layers_.size(); i++)
     {
       assert(layers_[i] != NULL);
-      layers_[i]->ScheduleLayerCreation(slice_);
+      changedLayers_[i] = true;
+      
+      //layers_[i]->ScheduleLayerCreation(slice_);
     }
   }
 
@@ -464,7 +470,9 @@
     }
 
     assert(layers_[layer] != NULL);
-    layers_[layer]->ScheduleLayerCreation(slice_);
+    changedLayers_[layer] = true;
+
+    //layers_[layer]->ScheduleLayerCreation(slice_);
   }
 
 
@@ -473,7 +481,7 @@
     size_t index;
     if (LookupLayer(index, source))
     {
-      layers_[index]->ScheduleLayerCreation(slice_);
+      InvalidateLayer(index);
     }
   }
   
@@ -486,7 +494,7 @@
       size_t index;
       if (LookupLayer(index, source))
       {
-        layers_[index]->ScheduleLayerCreation(slice_);
+        InvalidateLayer(index);
       }
     }
   }
@@ -521,4 +529,31 @@
       }
     }
   }
+
+
+  void LayerWidget::ResetChangedLayers()
+  {
+    changedLayers_.resize(layers_.size());
+
+    for (size_t i = 0; i < changedLayers_.size(); i++)
+    {
+      changedLayers_[i] = false;
+    }
+  }
+
+
+  void LayerWidget::UpdateContent()
+  {
+    assert(changedLayers_.size() <= layers_.size());
+    
+    for (size_t i = 0; i < changedLayers_.size(); i++)
+    {
+      if (changedLayers_[i])
+      {
+        layers_[i]->ScheduleLayerCreation(slice_);
+      }
+    }
+    
+    ResetChangedLayers();
+  }
 }
diff -r fcec0ab44054 -r 474d85e76499 Framework/Widgets/LayerWidget.h
--- a/Framework/Widgets/LayerWidget.h	Wed May 31 17:01:18 2017 +0200
+++ b/Framework/Widgets/LayerWidget.h	Wed May 31 18:05:33 2017 +0200
@@ -45,7 +45,7 @@
     SliceGeometry               slice_;
     std::auto_ptr<Scene>        currentScene_;
     std::auto_ptr<Scene>        pendingScene_;
-
+    std::vector<bool>           changedLayers_;
 
     bool LookupLayer(size_t& index /* out */,
                      const ILayerSource& layer) const;
@@ -67,6 +67,7 @@
                                   const Slice& slice,
                                   bool isError);
 
+    void ResetChangedLayers();
         
   protected:
     virtual void GetSceneExtent(double& x1,
@@ -108,5 +109,12 @@
     {
       return slice_;
     }
+
+    virtual bool HasUpdateContent() const
+    {
+      return true;
+    }
+
+    virtual void UpdateContent();
   };
 }