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

  Program:   Visualization Toolkit
  Module:    $RCSfile: vtkScalarBarActor.h,v $
  Language:  C++
  Date:      $Date: 2001/11/13 14:17:29 $
  Version:   $Revision: 1.35 $

Copyright (c) 1993-2001 Ken Martin, Will Schroeder, Bill Lorensen 
All rights reserved.

Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:

 * Redistributions of source code must retain the above copyright notice,
   this list of conditions and the following disclaimer.

 * Redistributions in binary form must reproduce the above copyright notice,
   this list of conditions and the following disclaimer in the documentation
   and/or other materials provided with the distribution.

 * Neither name of Ken Martin, Will Schroeder, or Bill Lorensen nor the names
   of any contributors may be used to endorse or promote products derived
   from this software without specific prior written permission.

 * Modified source versions must be plainly marked as such, and must not be
   misrepresented as being the original software.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS IS''
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE FOR
ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

=========================================================================*/
// .NAME vtkScalarBarActor - Create a scalar bar with labels
// .SECTION Description
// vtkScalarBarActor creates a scalar bar with annotation text. A scalar
// bar is a legend that indicates to the viewer the correspondence between
// color value and data value. The legend consists of a rectangular bar 
// made of rectangular pieces each colored a constant value. Since 
// vtkScalarBarActor is a subclass of vtkActor2D, it is drawn in the image 
// plane (i.e., in the renderer's viewport) on top of the 3D graphics window.
//
// To use vtkScalarBarActor you must associate a vtkScalarsToColors (or
// subclass) with it. The lookup table defines the colors and the
// range of scalar values used to map scalar data.  Typically, the
// number of colors shown in the scalar bar is not equal to the number
// of colors in the lookup table, in which case sampling of
// the lookup table is performed. 
//
// Other optional capabilities include specifying the fraction of the
// viewport size (both x and y directions) which will control the size
// of the scalar bar, the number of annotation labels, and the font
// attributes of the annotation text. The actual position of the
// scalar bar on the screen is controlled by using the
// vtkActor2D::SetPosition() method (by default the scalar bar is
// centered in the viewport).  Other features include the ability to
// orient the scalar bar horizontally of vertically and controlling
// the format (printf style) with which to print the labels on the
// scalar bar. Also, the vtkScalarBarActor's property is applied to
// the scalar bar and annotation (including color, layer, and
// compositing operator).

// .SECTION See Also
// vtkActor2D vtkTextMapper vtkPolyDataMapper2D

#ifndef __vtkScalarBarActor_h
#define __vtkScalarBarActor_h

#include "vtkActor2D.h"
#include "vtkScalarsToColors.h"
#include "vtkPolyDataMapper2D.h"
#include "vtkTextMapper.h"

#define VTK_ORIENT_HORIZONTAL 0
#define VTK_ORIENT_VERTICAL 1

class VTK_RENDERING_EXPORT vtkScalarBarActor : public vtkActor2D
{
public:
  vtkTypeMacro(vtkScalarBarActor,vtkActor2D);
  void PrintSelf(ostream& os, vtkIndent indent);

  // Description:
  // Instantiate object with 64 maximum colors; 5 labels; font size 12
  // of font Arial (bolding, italic, shadows on); %%-#6.3g label
  // format, no title, and vertical orientation. The initial scalar bar
  // size is (0.05 x 0.8) of the viewport size.
  static vtkScalarBarActor *New();


  // Description:
  // Draw the scalar bar and annotation text to the screen.
  int RenderOpaqueGeometry(vtkViewport* viewport);
  int RenderTranslucentGeometry(vtkViewport*) { return 0; };
  int RenderOverlay(vtkViewport* viewport);

  // Description:
  // Release any graphics resources that are being consumed by this actor.
  // The parameter window could be used to determine which graphic
  // resources to release.
  virtual void ReleaseGraphicsResources(vtkWindow *);

  // Description:
  // Set/Get the vtkLookupTable to use. The lookup table specifies the number
  // of colors to use in the table (if not overridden), as well as the scalar
  // range.
  vtkSetObjectMacro(LookupTable,vtkScalarsToColors);
  vtkGetObjectMacro(LookupTable,vtkScalarsToColors);

  // Description:
  // Set/Get the maximum number of scalar bar segments to show. This may
  // differ from the number of colors in the lookup table, in which case
  // the colors are samples from the lookup table.
  vtkSetClampMacro(MaximumNumberOfColors, int, 2, VTK_LARGE_INTEGER);
  vtkGetMacro(MaximumNumberOfColors, int);
  
  // Description:
  // Set/Get the number of annotation labels to show.
  vtkSetClampMacro(NumberOfLabels, int, 0, 64);
  vtkGetMacro(NumberOfLabels, int);
  
  // Description:
  // Control the orientation of the scalar bar.
  vtkSetClampMacro(Orientation,int,VTK_ORIENT_HORIZONTAL, VTK_ORIENT_VERTICAL);
  vtkGetMacro(Orientation, int);
  void SetOrientationToHorizontal()
       {this->SetOrientation(VTK_ORIENT_HORIZONTAL);};
  void SetOrientationToVertical() {this->SetOrientation(VTK_ORIENT_VERTICAL);};

  // Description:
  // Enable/Disable bolding annotation text.
  vtkSetMacro(Bold, int);
  vtkGetMacro(Bold, int);
  vtkBooleanMacro(Bold, int);

  // Description:
  // Enable/Disable italicizing annotation text.
  vtkSetMacro(Italic, int);
  vtkGetMacro(Italic, int);
  vtkBooleanMacro(Italic, int);

  // Description:
  // Enable/Disable creating shadows on the annotation text. Shadows make 
  // the text easier to read.
  vtkSetMacro(Shadow, int);
  vtkGetMacro(Shadow, int);
  vtkBooleanMacro(Shadow, int);

  // Description:
  // Set/Get the font family for the annotation text. Three font types 
  // are available: Arial (VTK_ARIAL), Courier (VTK_COURIER), and 
  // Times (VTK_TIMES).
  vtkSetMacro(FontFamily, int);
  vtkGetMacro(FontFamily, int);
  void SetFontFamilyToArial() {this->SetFontFamily(VTK_ARIAL);};
  void SetFontFamilyToCourier() {this->SetFontFamily(VTK_COURIER);};
  void SetFontFamilyToTimes() {this->SetFontFamily(VTK_TIMES);};

  // Description:
  // Set/Get the format with which to print the labels on the scalar
  // bar.
  vtkSetStringMacro(LabelFormat);
  vtkGetStringMacro(LabelFormat);

  // Description:
  // Set/Get the title of the scalar bar actor,
  vtkSetStringMacro(Title);
  vtkGetStringMacro(Title);

  // Description:
  // Shallow copy of a scalar bar actor. Overloads the virtual vtkProp method.
  void ShallowCopy(vtkProp *prop);

protected:
  vtkScalarBarActor();
  ~vtkScalarBarActor();

  vtkScalarsToColors *LookupTable;
  int   MaximumNumberOfColors;
  int   NumberOfLabels;
  int   NumberOfLabelsBuilt;
  int   Orientation;
  char  *Title;

  int   Bold;
  int   Italic;
  int   Shadow;
  int   FontFamily;
  char  *LabelFormat;

private:
  vtkTextMapper *TitleMapper;
  vtkActor2D    *TitleActor;

  vtkTextMapper **TextMappers;
  vtkActor2D    **TextActors;

  vtkPolyData         *ScalarBar;
  vtkPolyDataMapper2D *ScalarBarMapper;
  vtkActor2D          *ScalarBarActor;

  vtkTimeStamp  BuildTime;
  int LastSize[2];
  int LastOrigin[2];

  void SizeTitle(int *titleSize, int *size, vtkViewport *viewport);
  void AllocateAndSizeLabels(int *labelSize, int *size,
                             vtkViewport *viewport, float *range);
private:
  vtkScalarBarActor(const vtkScalarBarActor&);  // Not implemented.
  void operator=(const vtkScalarBarActor&);  // Not implemented.
};


#endif