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/*=========================================================================
Program: Visualization Toolkit
Module: vtkLabelSizeCalculator.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 vtkLabelSizeCalculator
// .SECTION Description
// This filter takes an input dataset, an array to process
// (which must be a string array), and a text property.
// It creates a new output array (named "LabelSize" by default) with
// 4 components per tuple that contain the width, height, horizontal
// offset, and descender height (in that order) of each string in
// the array.
//
// Use the inherited SelectInputArrayToProcess to indicate a string array.
// In no input array is specified, the first of the following that
// is a string array is used: point scalars, cell scalars, field scalars.
//
// The second input array to process is an array specifying the type of
// each label. Different label types may have different font properties.
// This array must be a vtkIntArray.
// Any type that does not map to a font property that was set will
// be set to the type 0's type property.
#ifndef vtkLabelSizeCalculator_h
#define vtkLabelSizeCalculator_h
#include "vtkRenderingLabelModule.h" // For export macro
#include "vtkPassInputTypeAlgorithm.h"
class vtkIntArray;
class vtkFreeTypeUtilities;
class vtkStringArray;
class vtkTextProperty;
class VTKRENDERINGLABEL_EXPORT vtkLabelSizeCalculator : public vtkPassInputTypeAlgorithm
{
public:
static vtkLabelSizeCalculator* New();
virtual void PrintSelf( ostream& os, vtkIndent indent );
vtkTypeMacro(vtkLabelSizeCalculator,vtkPassInputTypeAlgorithm);
// Description:
// Get/Set the font used compute label sizes.
// This defaults to "Arial" at 12 points.
// If type is provided, it refers to the type of the text label provided
// in the optional label type array. The default type is type 0.
virtual void SetFontProperty(vtkTextProperty* fontProp, int type = 0);
virtual vtkTextProperty* GetFontProperty(int type = 0);
// Description:
// The name of the output array containing text label sizes
// This defaults to "LabelSize"
vtkSetStringMacro(LabelSizeArrayName);
vtkGetStringMacro(LabelSizeArrayName);
protected:
vtkLabelSizeCalculator();
virtual ~vtkLabelSizeCalculator();
virtual int FillInputPortInformation( int port, vtkInformation* info );
virtual int RequestData(
vtkInformation* request,
vtkInformationVector** inInfo,
vtkInformationVector* outInfo );
virtual vtkIntArray* LabelSizesForArray( vtkAbstractArray* labels, vtkIntArray* types );
virtual void SetFontUtil( vtkFreeTypeUtilities* fontProp );
vtkGetObjectMacro(FontUtil,vtkFreeTypeUtilities);
vtkFreeTypeUtilities* FontUtil;
char* LabelSizeArrayName;
//BTX
class Internals;
Internals* Implementation;
//ETX
private:
vtkLabelSizeCalculator( const vtkLabelSizeCalculator& ); // Not implemented.
void operator = ( const vtkLabelSizeCalculator& ); // Not implemented.
};
#endif // vtkLabelSizeCalculator_h
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