dox/Interaction/Widgets/vtkBorderRepresentation.h

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/*=========================================================================

  Program:   Visualization Toolkit
  Module:    vtkBorderRepresentation.h

  Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
  All rights reserved.
  See Copyright.txt or http://www.kitware.com/Copyright.htm for details.

     This software is distributed WITHOUT ANY WARRANTY; without even
     the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
     PURPOSE.  See the above copyright notice for more information.

=========================================================================*/
#ifndef __vtkBorderRepresentation_h
#define __vtkBorderRepresentation_h

#include "vtkInteractionWidgetsModule.h" // For export macro
#include "vtkWidgetRepresentation.h"
#include "vtkCoordinate.h" //Because of the viewport coordinate macro

class vtkPoints;
class vtkPolyData;
class vtkTransform;
class vtkTransformPolyDataFilter;
class vtkPolyDataMapper2D;
class vtkActor2D;
class vtkProperty2D;


class VTKINTERACTIONWIDGETS_EXPORT vtkBorderRepresentation : public vtkWidgetRepresentation
{
public:
  static vtkBorderRepresentation *New();


  vtkTypeMacro(vtkBorderRepresentation,vtkWidgetRepresentation);
  void PrintSelf(ostream& os, vtkIndent indent);


  vtkViewportCoordinateMacro(Position);
  vtkViewportCoordinateMacro(Position2);

//BTX
  enum {BORDER_OFF=0,BORDER_ON,BORDER_ACTIVE};
//ETX

  vtkSetClampMacro(ShowBorder,int,BORDER_OFF,BORDER_ACTIVE);
  vtkGetMacro(ShowBorder,int);
  void SetShowBorderToOff() {this->SetShowBorder(BORDER_OFF);}
  void SetShowBorderToOn() {this->SetShowBorder(BORDER_ON);}
  void SetShowBorderToActive() {this->SetShowBorder(BORDER_ACTIVE);}


  vtkGetObjectMacro(BorderProperty,vtkProperty2D);


  vtkSetMacro(ProportionalResize,int);
  vtkGetMacro(ProportionalResize,int);
  vtkBooleanMacro(ProportionalResize,int);


  vtkSetVector2Macro(MinimumSize,int);
  vtkGetVector2Macro(MinimumSize,int);
  vtkSetVector2Macro(MaximumSize,int);
  vtkGetVector2Macro(MaximumSize,int);


  vtkSetClampMacro(Tolerance,int,1,10);
  vtkGetMacro(Tolerance,int);


  vtkGetVectorMacro(SelectionPoint,double,2);


  vtkSetMacro(Moving,int);
  vtkGetMacro(Moving,int);
  vtkBooleanMacro(Moving,int);

//BTX

  enum _InteractionState
  {
    Outside=0,
    Inside,
    AdjustingP0,
    AdjustingP1,
    AdjustingP2,
    AdjustingP3,
    AdjustingE0,
    AdjustingE1,
    AdjustingE2,
    AdjustingE3
  };
//ETX


  virtual void BuildRepresentation();
  virtual void StartWidgetInteraction(double eventPos[2]);
  virtual void WidgetInteraction(double eventPos[2]);
  virtual void GetSize(double size[2])
    {size[0]=1.0; size[1]=1.0;}
  virtual int ComputeInteractionState(int X, int Y, int modify=0);


  virtual void GetActors2D(vtkPropCollection*);
  virtual void ReleaseGraphicsResources(vtkWindow*);
  virtual int RenderOverlay(vtkViewport*);
  virtual int RenderOpaqueGeometry(vtkViewport*);
  virtual int RenderTranslucentPolygonalGeometry(vtkViewport*);
  virtual int HasTranslucentPolygonalGeometry();

protected:
  vtkBorderRepresentation();
  ~vtkBorderRepresentation();

  // Ivars
  int           ShowBorder;
  vtkProperty2D *BorderProperty;
  int           ProportionalResize;
  int           Tolerance;
  int           Moving;
  double        SelectionPoint[2];

  // Layout (position of lower left and upper right corners of border)
  vtkCoordinate *PositionCoordinate;
  vtkCoordinate *Position2Coordinate;

  // Sometimes subclasses must negotiate with their superclasses
  // to achieve the correct layout.
  int Negotiated;
  virtual void NegotiateLayout();

  // Keep track of start position when moving border
  double StartPosition[2];

  // Border representation. Subclasses may use the BWTransform class
  // to transform their geometry into the region surrounded by the border.
  vtkPoints                  *BWPoints;
  vtkPolyData                *BWPolyData;
  vtkTransform               *BWTransform;
  vtkTransformPolyDataFilter *BWTransformFilter;
  vtkPolyDataMapper2D        *BWMapper;
  vtkActor2D                 *BWActor;

  // Constraints on size
  int MinimumSize[2];
  int MaximumSize[2];

private:
  vtkBorderRepresentation(const vtkBorderRepresentation&);  //Not implemented
  void operator=(const vtkBorderRepresentation&);  //Not implemented
};

#endif