vtkContextScenePrivate.h

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// SPDX-FileCopyrightText: Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
// SPDX-License-Identifier: BSD-3-Clause
 
#ifndef vtkContextScenePrivate_h
#define vtkContextScenePrivate_h
 
#include "vtkAbstractContextItem.h"
#include "vtkContextScene.h"
 
// STL headers
#include <vector> // Needed for STL vector.
 
VTK_ABI_NAMESPACE_BEGIN
class vtkContext2D;
 
//-----------------------------------------------------------------------------
class vtkContextScenePrivate : public std::vector<vtkAbstractContextItem*>
{
public:
  vtkContextScenePrivate(vtkAbstractContextItem* item)
    : Scene(nullptr)
    , Item(item)
  {
  }
 
  ~vtkContextScenePrivate() { this->Clear(); }
 
 
  typedef std::vector<vtkAbstractContextItem*>::const_iterator const_iterator;
  typedef std::vector<vtkAbstractContextItem*>::iterator iterator;
  typedef std::vector<vtkAbstractContextItem*>::const_reverse_iterator const_reverse_iterator;
  typedef std::vector<vtkAbstractContextItem*>::reverse_iterator reverse_iterator;
 
  void PaintItems(vtkContext2D* context)
  {
    for (const_iterator it = this->begin(); it != this->end(); ++it)
    {
      if ((*it)->GetVisible())
      {
        (*it)->Paint(context);
      }
    }
  }
 
 
  unsigned int AddItem(vtkAbstractContextItem* item)
  {
    item->Register(this->Scene);
    item->SetScene(this->Scene);
    item->SetParent(this->Item);
 
    this->push_back(item);
    return static_cast<unsigned int>(this->size() - 1);
  }
 
 
  bool RemoveItem(vtkAbstractContextItem* item)
  {
    for (iterator it = this->begin(); it != this->end(); ++it)
    {
      if (item == *it)
      {
        item->SetParent(nullptr);
        item->SetScene(nullptr);
        (*it)->Delete();
        this->erase(it);
        return true;
      }
    }
    return false;
  }
 
 
  bool RemoveItem(unsigned int index)
  {
    if (index < this->size())
    {
      return this->RemoveItem(this->at(index));
    }
    return false;
  }
 
 
  void Clear()
  {
    for (const_iterator it = this->begin(); it != this->end(); ++it)
    {
      (*it)->SetParent(nullptr);
      (*it)->SetScene(nullptr);
      // releases cache from 2D, 3D devices
      (*it)->ReleaseGraphicsResources();
      (*it)->Delete();
    }
    this->clear();
  }
 
 
  void SetScene(vtkContextScene* scene)
  {
    if (this->Scene == scene)
    {
      return;
    }
    this->Scene = scene;
    for (const_iterator it = this->begin(); it != this->end(); ++it)
    {
      (*it)->SetScene(scene);
    }
  }
 
  vtkContextScene* Scene;
 
 
  vtkAbstractContextItem* Item;
};
 
VTK_ABI_NAMESPACE_END
#endif // vtkContextScenePrivate_h
// VTK-HeaderTest-Exclude: vtkContextScenePrivate.h