src/SVTK/SVTK_KeyFreeInteractorStyle.cxx

   1 // Copyright (C) 2007-2012  CEA/DEN, EDF R&D, OPEN CASCADE
   2 //
   3 // This library is free software; you can redistribute it and/or
   4 // modify it under the terms of the GNU Lesser General Public
   5 // License as published by the Free Software Foundation; either
   6 // version 2.1 of the License.
   7 //
   8 // This library is distributed in the hope that it will be useful,
   9 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  10 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  11 // Lesser General Public License for more details.
  12 //
  13 // You should have received a copy of the GNU Lesser General Public
  14 // License along with this library; if not, write to the Free Software
  15 // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  16 //
  17 // See http://www.salome-platform.org/ or email : webmaster.salome@opencascade.com
  18 //
  19
  20 //  SALOME VTKViewer : build VTK viewer into Salome desktop
  21 //  File   : SVTK_KeyFreeInteractorStyle.cxx
  22 //  Author : Christophe ATTANASIO
  23
  24 #include "SVTK_KeyFreeInteractorStyle.h"
  25 #include "SVTK_Selector.h"
  26
  27 #include <vtkObjectFactory.h>
  28 #include <vtkRenderWindowInteractor.h>
  29 #include <vtkCallbackCommand.h>
  30 #include <vtkCommand.h>
  31 #include <vtkRenderer.h>
  32 #include <vtkCamera.h>
  33
  34
  35 //----------------------------------------------------------------------------
  36 vtkStandardNewMacro(SVTK_KeyFreeInteractorStyle);
  37 //----------------------------------------------------------------------------
  38
  39 SVTK_KeyFreeInteractorStyle::SVTK_KeyFreeInteractorStyle():
  40   myIsMidButtonDown( false ),
  41   myIsLeftButtonDown( false )
  42 {
  43 }
  44
  45 //----------------------------------------------------------------------------
  46 SVTK_KeyFreeInteractorStyle::~SVTK_KeyFreeInteractorStyle()
  47 {
  48 }
  49
  50 //----------------------------------------------------------------------------
  51 void SVTK_KeyFreeInteractorStyle::OnLeftButtonDown(int ctrl, int shift,
  52                                                    int x, int y)
  53 {
  54   myIsLeftButtonDown = true;
  55
  56   if (this->HasObserver(vtkCommand::LeftButtonPressEvent)) {
  57     this->InvokeEvent(vtkCommand::LeftButtonPressEvent,NULL);
  58     return;
  59   }
  60   this->FindPokedRenderer(x, y);
  61   if (this->CurrentRenderer == NULL) {
  62     return;
  63   }
  64   myShiftState = shift;
  65   // finishing current viewer operation
  66   if (State != VTK_INTERACTOR_STYLE_CAMERA_NONE) {
  67     onFinishOperation();
  68     startOperation(VTK_INTERACTOR_STYLE_CAMERA_NONE);
  69   }
  70   myOtherPoint = myPoint = QPoint(x, y);
  71   if (ForcedState != VTK_INTERACTOR_STYLE_CAMERA_NONE) {
  72     startOperation(ForcedState);
  73   }
  74   else {
  75     if (!(ctrl||shift)){
  76       if (myIsMidButtonDown){
  77         startOperation(VTK_INTERACTOR_STYLE_CAMERA_ZOOM);
  78       }
  79       else{
  80         startOperation(VTK_INTERACTOR_STYLE_CAMERA_ROTATE);
  81       }
  82     }
  83   }
  84   return;
  85 }
  86
  87 //----------------------------------------------------------------------------
  88 void SVTK_KeyFreeInteractorStyle::OnMiddleButtonDown(int ctrl,
  89                                                      int shift,
  90                                                      int x, int y)
  91 {
  92   myIsMidButtonDown = true;
  93
  94   if (this->HasObserver(vtkCommand::MiddleButtonPressEvent))  {
  95     this->InvokeEvent(vtkCommand::MiddleButtonPressEvent,NULL);
  96     return;
  97   }
  98   this->FindPokedRenderer(x, y);
  99   if (this->CurrentRenderer == NULL)    {
 100     return;
 101   }
 102   myShiftState = shift;
 103   // finishing current viewer operation
 104   if (State != VTK_INTERACTOR_STYLE_CAMERA_NONE) {
 105     onFinishOperation();
 106     startOperation(VTK_INTERACTOR_STYLE_CAMERA_NONE);
 107   }
 108   myOtherPoint = myPoint = QPoint(x, y);
 109   if (ForcedState != VTK_INTERACTOR_STYLE_CAMERA_NONE) {
 110     startOperation(ForcedState);
 111   }
 112   else {
 113     if (!(ctrl||shift)){
 114       if ( myIsLeftButtonDown ){
 115         startOperation(VTK_INTERACTOR_STYLE_CAMERA_ZOOM);
 116       }
 117       else{
 118         startOperation(VTK_INTERACTOR_STYLE_CAMERA_PAN);
 119       }
 120     }
 121   }
 122 }
 123
 124 //----------------------------------------------------------------------------
 125 void SVTK_KeyFreeInteractorStyle::OnLeftButtonUp(int ctrl, int shift, int x, int y)
 126 {
 127   myIsLeftButtonDown = false;
 128   SVTK_InteractorStyle::OnLeftButtonUp( ctrl, shift, x, y );
 129
 130   if ( myIsMidButtonDown )
 131     OnMiddleButtonDown( ctrl, shift, x, y );
 132 }
 133
 134 //----------------------------------------------------------------------------
 135 void SVTK_KeyFreeInteractorStyle::OnMiddleButtonUp(int ctrl, int shift, int x, int y)
 136 {
 137   myIsMidButtonDown = false;
 138   SVTK_InteractorStyle::OnMiddleButtonUp( ctrl, shift, x, y );
 139
 140   if ( myIsLeftButtonDown )
 141     OnLeftButtonDown( ctrl, shift, x, y );
 142 }
 143
 144 //----------------------------------------------------------------------------
 145 void SVTK_KeyFreeInteractorStyle::OnChar()
 146 {
 147   char key = GetInteractor()->GetKeyCode();
 148   switch (key) {
 149   case 's':
 150   case 'S':
 151     ActionPicking();
 152     EventCallbackCommand->AbortFlagOn();
 153     return;
 154   }
 155   SVTK_InteractorStyle::OnChar();
 156 }