From 58cd905dfd2cb77ebaef6857ca558dad4df02093 Mon Sep 17 00:00:00 2001
From: Leonardo Florez-Valencia <florez-l@javeriana.edu.co>
Date: Tue, 6 Oct 2015 22:02:22 -0500
Subject: [PATCH] Double-click dominated... It does not compile yet though

---
 .../Visualization/BaseInteractorStyle.cxx     | 63 ++++++++++++-------
 .../Visualization/BaseInteractorStyle.h       |  1 +
 2 files changed, 41 insertions(+), 23 deletions(-)

diff --git a/lib/cpExtensions/Visualization/BaseInteractorStyle.cxx b/lib/cpExtensions/Visualization/BaseInteractorStyle.cxx
index bf395a8..8eb3fee 100644
--- a/lib/cpExtensions/Visualization/BaseInteractorStyle.cxx
+++ b/lib/cpExtensions/Visualization/BaseInteractorStyle.cxx
@@ -1,23 +1,21 @@
 #include <cpExtensions/Visualization/BaseInteractorStyle.h>
 
-/*
-  Compile ITK and VTK with: cmake -DCMAKE_CXX_FLAGS="-std=c++11" /dir/to/source
+/* =========================================================================
+ * Double click algorithm taken from:
+ * http://www.autohotkey.com/board/topic/56493-easiest-way-to-detect-double-clicks/
+ * =========================================================================
 */
+
 /*
-  typedef std::chrono::time_point< std::chrono::system_clock > TTime;
-  typedef std::chrono::duration< long, std::ratio< 1, 1000 > > TTimeDiff;
+  Compile ITK and VTK with: cmake -DCMAKE_CXX_FLAGS="-std=c++11" /dir/to/source
 */
 
 #include <chrono>
-
 #include <vtkCallbackCommand.h>
 
 // -------------------------------------------------------------------------
-/*
-  const cpExtensions::Visualization::BaseInteractorStyle::TTime
-  cpExtensions::Visualization::BaseInteractorStyle::MinTime =
-  cpExtensions::Visualization::BaseInteractorStyle::TTime::min( );
-*/
+const long cpExtensions::Visualization::BaseInteractorStyle::
+MAX_DOUBLE_CLICK = 200;
 
 // -------------------------------------------------------------------------
 cpExtensions::Visualization::BaseInteractorStyle::
@@ -79,39 +77,58 @@ _ProcessEvents(
   break;
   case vtkCommand::LeftButtonPressEvent:
   {
-    /*
-    if( s->LastButton != Self::ButtonID_Left )
+    long tick_count =
+      std::chrono::duration_cast< std::chrono::milliseconds >(
+        std::chrono::system_clock::now( ).time_since_epoch( )
+        ).count( );
+    if(
+      s->LastButtonHeld < Self::MAX_DOUBLE_CLICK &&
+      ( tick_count - s->LastButtonUp ) < Self::MAX_DOUBLE_CLICK
+      )
+    {
+      std::cout << "double!!!" << std::endl;
+    }
+    else
     {
+      std::cout << "single!!!" << std::endl;
+
+    } // fi
+    if( s->LastButtonDown < 0 )
+      s->LastButtonDown = tick_count;
+
+    /*
+      if( s->LastButton != Self::ButtonID_Left )
+      {
       s->LastButton = Self::ButtonID_Left;
       s->LastButtonClicks = 1;
       s->LastButtonTime = std::chrono::system_clock::now( );
-    }
-    else if( s->LastButton == Self::ButtonID_Left )
+      }
+      else if( s->LastButton == Self::ButtonID_Left )
       s->LastButtonClicks++;
     */
   }
   break;
   case vtkCommand::LeftButtonReleaseEvent:
   {
-    long count =
+    long tick_count =
       std::chrono::duration_cast< std::chrono::milliseconds >(
-        std::chrono::system_clock::now( )
+        std::chrono::system_clock::now( ).time_since_epoch( )
         ).count( );
-    s->LastButtonUp = count;
-    s->LastButtonHeld = count - s->LastButtonDown;
+    s->LastButtonUp = tick_count;
+    s->LastButtonHeld = tick_count - s->LastButtonDown;
     s->LastButtonDown = -1;
 
     /*
-    if( s->LastButton == Self::ButtonID_Left )
-    {
+      if( s->LastButton == Self::ButtonID_Left )
+      {
       long d = std::chrono::duration_cast< std::chrono::milliseconds >(
-        std::chrono::system_clock::now( ) - s->LastButtonTime
-        ).count( );
+      std::chrono::system_clock::now( ) - s->LastButtonTime
+      ).count( );
       if( d < 500 )
       {
       } // fi
 
-    } // fi
+      } // fi
     */
   }
   break;
diff --git a/lib/cpExtensions/Visualization/BaseInteractorStyle.h b/lib/cpExtensions/Visualization/BaseInteractorStyle.h
index 849e386..f10a9bb 100644
--- a/lib/cpExtensions/Visualization/BaseInteractorStyle.h
+++ b/lib/cpExtensions/Visualization/BaseInteractorStyle.h
@@ -103,6 +103,7 @@ namespace cpExtensions
       Self& operator=( const Self& );
 
     protected:
+      static const long MAX_DOUBLE_CLICK;
       ButtonID LastButton;
       long LastButtonUp;
       long LastButtonHeld;
-- 
2.45.1