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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.
=========================================================================*/
/**
* @class vtkLabelSizeCalculator
*
* 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 vtkTextRenderer;
class vtkStringArray;
class vtkTextProperty;
class VTKRENDERINGLABEL_EXPORT vtkLabelSizeCalculator : public vtkPassInputTypeAlgorithm
{
public:
static vtkLabelSizeCalculator* New();
virtual void PrintSelf( ostream& os, vtkIndent indent );
vtkTypeMacro(vtkLabelSizeCalculator,vtkPassInputTypeAlgorithm);
//@{
/**
* 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);
//@}
//@{
/**
* The name of the output array containing text label sizes
* This defaults to "LabelSize"
*/
vtkSetStringMacro(LabelSizeArrayName);
vtkGetStringMacro(LabelSizeArrayName);
//@}
//@{
/**
* Get/Set the DPI at which the labels are to be rendered. Defaults to 72.
* @sa vtkWindow::GetDPI()
*/
vtkSetMacro(DPI, int)
vtkGetMacro(DPI, int)
//@}
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( vtkTextRenderer* fontProp );
vtkGetObjectMacro(FontUtil,vtkTextRenderer);
vtkTextRenderer* FontUtil;
char* LabelSizeArrayName;
int DPI;
class Internals;
Internals* Implementation;
private:
vtkLabelSizeCalculator( const vtkLabelSizeCalculator& ) VTK_DELETE_FUNCTION;
void operator = ( const vtkLabelSizeCalculator& ) VTK_DELETE_FUNCTION;
};
#endif // vtkLabelSizeCalculator_h
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