vtkQtLabelRenderStrategyInternals.h

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/*=========================================================================
 
  Program:   Visualization Toolkit
  Module:    vtkQtLabelRenderStrategy.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 vtkQtLabelRenderStrategyInternals - Internals to render labels with Qt
//
// .SECTION Description
// This class is an implementation detail of vtkQtLabelRenderStrategy
//
// This should only be included in the source file of a class derived from
// vtkQtLabelRenderStrategy.
 
#ifndef vtkQtLabelRenderStrategyInternals_h
#define vtkQtLabelRenderStrategyInternals_h
 
#include "vtkTextProperty.h"
 
#include <QColor>
#include <QFont>
#include <QImage>
#include <QMap>
#include <QString>
 
class QPainter;
 
struct vtkQtLabelMapEntry
{
  QString Text;
  QColor Color;
  QFont Font;
};
 
struct vtkQtLabelMapValue
{
  QImage Image;
  QRectF Bounds;
};
 
bool operator<(const vtkQtLabelMapEntry& a, const vtkQtLabelMapEntry& other);
 
class vtkQtLabelRenderStrategy::Internals
{
public:
  QImage* Image;
  QPainter* Painter;
  QMap<vtkQtLabelMapEntry, vtkQtLabelMapValue> Cache;
 
  QFont TextPropertyToFont(vtkTextProperty* tprop)
  {
    QFont fontSpec(tprop->GetFontFamilyAsString());
    fontSpec.setBold(tprop->GetBold());
    fontSpec.setItalic(tprop->GetItalic());
    fontSpec.setPixelSize(tprop->GetFontSize());
    return fontSpec;
  }
 
  QColor TextPropertyToColor(double* fc, double opacity)
  {
    QColor textColor(static_cast<int>(fc[0] * 255), static_cast<int>(fc[1] * 255),
      static_cast<int>(fc[2] * 255), static_cast<int>(opacity * 255));
    return textColor;
  }
};
 
#endif // vtkQtLabelRenderStrategyInternals_h
// VTK-HeaderTest-Exclude: vtkQtLabelRenderStrategyInternals.h