paraview-dev 5.0.1+dfsg1-4 / usr / include / paraview / vtkCaptionRepresentation.h

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

  Program:   Visualization Toolkit
  Module:    vtkCaptionRepresentation.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.

=========================================================================*/
// .NAME vtkCaptionRepresentation - represents vtkCaptionWidget in the scene
// .SECTION Description
// This class represents vtkCaptionWidget. A caption is defined by some text
// with a leader (e.g., arrow) that points from the text to a point in the
// scene. The caption is defined by an instance of vtkCaptionActor2D. It uses
// the event bindings of its superclass (vtkBorderWidget) to control the
// placement of the text, and adds the ability to move the attachment point
// around. In addition, when the caption text is selected, the widget emits a
// ActivateEvent that observers can watch for. This is useful for opening GUI
// dialogoues to adjust font characteristics, etc. (Please see the superclass
// for a description of event bindings.)
//
// Note that this widget extends the behavior of its superclass
// vtkBorderRepresentation.

// .SECTION See Also
// vtkCaptionWidget vtkBorderWidget vtkBorderRepresentation vtkCaptionActor


#ifndef vtkCaptionRepresentation_h
#define vtkCaptionRepresentation_h

#include "vtkInteractionWidgetsModule.h" // For export macro
#include "vtkBorderRepresentation.h"

class vtkRenderer;
class vtkCaptionActor2D;
class vtkConeSource;
class vtkPointHandleRepresentation3D;


class VTKINTERACTIONWIDGETS_EXPORT vtkCaptionRepresentation : public vtkBorderRepresentation
{
public:
  // Description:
  // Instantiate this class.
  static vtkCaptionRepresentation *New();

  // Description:
  // Standard VTK class methods.
  vtkTypeMacro(vtkCaptionRepresentation,vtkBorderRepresentation);
  void PrintSelf(ostream& os, vtkIndent indent);

  // Description:
  // Specify the position of the anchor (i.e., the point that the caption is anchored to).
  // Note that the position should be specified in world coordinates.
  void SetAnchorPosition(double pos[3]);
  void GetAnchorPosition(double pos[3]);

  // Description:
  // Specify the vtkCaptionActor2D to manage. If not specified, then one
  // is automatically created.
  void SetCaptionActor2D(vtkCaptionActor2D *captionActor);
  vtkGetObjectMacro(CaptionActor2D,vtkCaptionActor2D);

  // Description:
  // Set and get the instances of vtkPointHandleRepresention3D used to implement this
  // representation. Normally default representations are created, but you can
  // specify the ones you want to use.
  void SetAnchorRepresentation(vtkPointHandleRepresentation3D*);
  vtkGetObjectMacro(AnchorRepresentation,vtkPointHandleRepresentation3D);

  // Description:
  // Satisfy the superclasses API.
  virtual void BuildRepresentation();
  virtual void GetSize(double size[2])
    {size[0]=2.0; size[1]=2.0;}

  // Description:
  // These methods are necessary to make this representation behave as
  // a vtkProp.
  virtual void GetActors2D(vtkPropCollection*);
  virtual void ReleaseGraphicsResources(vtkWindow*);
  virtual int RenderOverlay(vtkViewport*);
  virtual int RenderOpaqueGeometry(vtkViewport*);
  virtual int RenderTranslucentPolygonalGeometry(vtkViewport*);
  virtual int HasTranslucentPolygonalGeometry();

  // Description:
  // Set/Get the factor that controls the overall size of the fonts
  // of the caption when the text actor's ScaledText is OFF
  vtkSetClampMacro(FontFactor, double, 0.1, 10.0);
  vtkGetMacro(FontFactor, double);

protected:
  vtkCaptionRepresentation();
  ~vtkCaptionRepresentation();

  // the text to manage
  vtkCaptionActor2D *CaptionActor2D;
  vtkConeSource     *CaptionGlyph;

  int PointWidgetState;
  int DisplayAttachmentPoint[2];
  double FontFactor;

  // Internal representation for the anchor
  vtkPointHandleRepresentation3D *AnchorRepresentation;

  // Check and adjust boundaries according to the size of the caption text
  virtual void AdjustCaptionBoundary();

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

#endif

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