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/*=========================================================================
Program: Visualization Toolkit
Module: vtkPolyDataItem.cxx
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.
=========================================================================*/
#include "vtkPolyDataItem.h"
#include "vtkAbstractMapper.h"
#include "vtkContext2D.h"
#include "vtkFieldData.h"
#include "vtkFloatArray.h"
#include "vtkIntArray.h"
#include "vtkObjectFactory.h"
#include "vtkPen.h"
#include "vtkPolyData.h"
#include "vtkUnsignedCharArray.h"
VTK_ABI_NAMESPACE_BEGIN
vtkStandardNewMacro(vtkPolyDataItem);
vtkCxxSetObjectMacro(vtkPolyDataItem, PolyData, vtkPolyData);
vtkCxxSetObjectMacro(vtkPolyDataItem, MappedColors, vtkUnsignedCharArray);
class vtkPolyDataItem::DrawHintsHelper
{
public:
DrawHintsHelper()
{
this->previousLineType = 0;
this->previousLineWidth = 0.0f;
}
/**
* Retrieve drawing hints as field data from the polydata and use the
* provided context2D to apply them
*/
void ApplyDrawHints(vtkContext2D* painter, vtkPolyData* polyData)
{
vtkFieldData* fieldData = polyData->GetFieldData();
vtkIntArray* stippleArray =
vtkIntArray::SafeDownCast(fieldData->GetAbstractArray("StippleType"));
vtkFloatArray* lineWidthArray =
vtkFloatArray::SafeDownCast(fieldData->GetAbstractArray("LineWidth"));
vtkPen* pen = painter->GetPen();
this->previousLineType = pen->GetLineType();
this->previousLineWidth = pen->GetWidth();
if (stippleArray != nullptr)
{
pen->SetLineType(stippleArray->GetValue(0));
}
if (lineWidthArray != nullptr)
{
pen->SetWidth(lineWidthArray->GetValue(0));
}
}
/**
* "Un-apply" hints by restoring saved drawing state
*/
void RemoveDrawHints(vtkContext2D* painter)
{
vtkPen* pen = painter->GetPen();
pen->SetLineType(this->previousLineType);
pen->SetWidth(this->previousLineWidth);
};
private:
DrawHintsHelper(const DrawHintsHelper&) = delete;
void operator=(const DrawHintsHelper&) = delete;
int previousLineType;
float previousLineWidth;
};
//------------------------------------------------------------------------------
vtkPolyDataItem::vtkPolyDataItem()
: PolyData(nullptr)
, MappedColors(nullptr)
, ScalarMode(VTK_SCALAR_MODE_USE_POINT_DATA)
{
this->Position[0] = this->Position[1] = 0;
this->HintHelper = new vtkPolyDataItem::DrawHintsHelper();
}
//------------------------------------------------------------------------------
vtkPolyDataItem::~vtkPolyDataItem()
{
this->SetPolyData(nullptr);
this->SetMappedColors(nullptr);
delete this->HintHelper;
}
//------------------------------------------------------------------------------
bool vtkPolyDataItem::Paint(vtkContext2D* painter)
{
if (this->PolyData && this->MappedColors)
{
this->HintHelper->ApplyDrawHints(painter, this->PolyData);
// Draw the PolyData in the bottom left corner of the item.
painter->DrawPolyData(
this->Position[0], this->Position[1], this->PolyData, this->MappedColors, this->ScalarMode);
this->HintHelper->RemoveDrawHints(painter);
}
return true;
}
//------------------------------------------------------------------------------
void vtkPolyDataItem::PrintSelf(ostream& os, vtkIndent indent)
{
Superclass::PrintSelf(os, indent);
}
VTK_ABI_NAMESPACE_END
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