From 1d266c04ecd852308ee6efe6f7061988a2c8cc88 Mon Sep 17 00:00:00 2001
From: asv <asv@opencascade.com>
Date: Fri, 26 Aug 2005 07:05:36 +0000
Subject: [PATCH] Selection (picking) with 'P' key press implemented.

---
 src/VVTK/VVTK_InteractorStyle.cxx | 27 +++++++++++++++++++++++++--
 src/VVTK/VVTK_InteractorStyle.h   |  5 +++++
 2 files changed, 30 insertions(+), 2 deletions(-)

diff --git a/src/VVTK/VVTK_InteractorStyle.cxx b/src/VVTK/VVTK_InteractorStyle.cxx
index adde9624..da7b4bcf 100644
--- a/src/VVTK/VVTK_InteractorStyle.cxx
+++ b/src/VVTK/VVTK_InteractorStyle.cxx
@@ -30,6 +30,7 @@
 #include "VVTK_InteractorStyle.h"
 
 #include <vtkObjectFactory.h>
+#include <vtkRenderWindowInteractor.h>
 #include <vtkCommand.h>
 
 //----------------------------------------------------------------------------
@@ -37,9 +38,11 @@ vtkStandardNewMacro(VVTK_InteractorStyle);
 //----------------------------------------------------------------------------
 
 VVTK_InteractorStyle
-::VVTK_InteractorStyle() 
+::VVTK_InteractorStyle()
+  : myPickingKey( 'P' ),
+    myIsMidButtonDown( false ),
+    myIsLeftButtonDown( false )
 {
-  printf ( "\n--- VVTK_InteractorStyle created  ---\n" );
 }
 
 //----------------------------------------------------------------------------
@@ -146,3 +149,23 @@ VVTK_InteractorStyle
   if ( myIsLeftButtonDown )
     OnLeftButtonDown( ctrl, shift, x, y );
 }
+
+//----------------------------------------------------------------------------
+void  
+VVTK_InteractorStyle
+::OnKeyDown()
+{
+  char key = Interactor->GetKeyCode();
+  if ( key == myPickingKey ) {
+    int x, y;
+    Interactor->GetEventPosition( x, y ); // current mouse position (from last mouse move event or any other event)
+    FindPokedRenderer( x, y ); // calls SetCurrentRenderer
+
+    myOtherPoint = myPoint = QPoint(x, y);
+    //printf ( "--- myPoint[ %d, %d ], myOtherPoint[ %d, %d ] ---\n", myPoint.x(), myPoint.y(), myOtherPoint.x(), myOtherPoint.y() );
+
+    startOperation(VTK_INTERACTOR_STYLE_CAMERA_SELECT);
+    onFinishOperation();
+    startOperation(VTK_INTERACTOR_STYLE_CAMERA_NONE);
+  }
+}
diff --git a/src/VVTK/VVTK_InteractorStyle.h b/src/VVTK/VVTK_InteractorStyle.h
index eef18a84..2a958377 100644
--- a/src/VVTK/VVTK_InteractorStyle.h
+++ b/src/VVTK/VVTK_InteractorStyle.h
@@ -43,6 +43,8 @@ class VVTK_EXPORT VVTK_InteractorStyle : public SVTK_InteractorStyle
   static VVTK_InteractorStyle *New();
   vtkTypeMacro(VVTK_InteractorStyle, vtkInteractorStyle);
 
+  void setPickingKey( char key ) { myPickingKey = key; }
+
  protected:
   VVTK_InteractorStyle();
   ~VVTK_InteractorStyle();
@@ -54,10 +56,13 @@ class VVTK_EXPORT VVTK_InteractorStyle : public SVTK_InteractorStyle
   virtual void OnMiddleButtonDown(int ctrl, int shift, int x, int y);
   virtual void OnLeftButtonUp(int ctrl, int shift, int x, int y);
   virtual void OnMiddleButtonUp(int ctrl, int shift, int x, int y);
+  virtual void OnKeyDown();
 
  private:
   bool myIsMidButtonDown;
   bool myIsLeftButtonDown;
+
+  char myPickingKey;
 };
 
 #endif
-- 
2.39.2