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/*=========================================================================
Program: Visualization Toolkit
Module: vtkPlotLine.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 "vtkPlotLine.h"
#include "vtkContext2D.h"
#include "vtkPen.h"
#include "vtkRect.h"
#include "vtkPoints2D.h"
#include "vtkIdTypeArray.h"
#include "vtkObjectFactory.h"
//-----------------------------------------------------------------------------
vtkStandardNewMacro(vtkPlotLine);
//-----------------------------------------------------------------------------
vtkPlotLine::vtkPlotLine()
{
this->MarkerStyle = vtkPlotPoints::NONE;
this->PolyLine = true;
}
//-----------------------------------------------------------------------------
vtkPlotLine::~vtkPlotLine()
{
}
//-----------------------------------------------------------------------------
bool vtkPlotLine::Paint(vtkContext2D *painter)
{
// This is where everything should be drawn, or dispatched to other methods.
vtkDebugMacro(<< "Paint event called in vtkPlotLine.");
if (!this->Visible || !this->Points)
{
return false;
}
// Draw the line between the points
painter->ApplyPen(this->Pen);
if (this->BadPoints && this->BadPoints->GetNumberOfTuples() > 0)
{
// draw lines skipping bad points
float *points = static_cast<float *>(this->Points->GetVoidPointer(0));
const int pointSize = 2;
vtkIdType lastGood = 0;
for (vtkIdType i = 0; i < this->BadPoints->GetNumberOfTuples(); i++)
{
vtkIdType id = this->BadPoints->GetValue(i);
// render from last good point to one before this bad point
if (id - lastGood > 2)
{
int start = lastGood + 1;
int numberOfPoints = id - start;
if (!this->PolyLine)
{
// Start at the next point if the last bad point was the first point
// of a line segment.
if (start % 2 == 0)
{
++start;
--numberOfPoints;
}
// Stops at the previous point if the next bad point is the second point
// of a line segment.
if (numberOfPoints % 2 == 1)
{
--numberOfPoints;
}
}
if (this->PolyLine)
{
painter->DrawPoly(points + pointSize * start, numberOfPoints);
}
else if (start < this->Points->GetNumberOfPoints() && numberOfPoints > 0)
{
painter->DrawLines(points + pointSize * start, numberOfPoints);
}
}
lastGood = id;
}
// render any trailing good points
if (this->Points->GetNumberOfPoints() - lastGood > 2)
{
int start = lastGood + 1;
int numberOfPoints = this->Points->GetNumberOfPoints() - start;
if (!this->PolyLine)
{
// Start at the next point if the last bad point was the first point
// of a line segment.
if (start % 2 == 0)
{
++start;
--numberOfPoints;
}
// Stops at the previous point if the next bad point is the second point
// of a line segment.
if (numberOfPoints % 2 == 1)
{
--numberOfPoints;
}
}
if (this->PolyLine)
{
painter->DrawPoly(points + pointSize * start, numberOfPoints);
}
else if (start < this->Points->GetNumberOfPoints() && numberOfPoints > 0)
{
painter->DrawLines(points + pointSize * start, numberOfPoints);
}
}
}
else
{
// draw lines between all points
if (this->PolyLine)
{
painter->DrawPoly(this->Points);
}
else
{
painter->DrawLines(this->Points);
}
}
return this->vtkPlotPoints::Paint(painter);
}
//-----------------------------------------------------------------------------
bool vtkPlotLine::PaintLegend(vtkContext2D *painter, const vtkRectf& rect, int)
{
painter->ApplyPen(this->Pen);
painter->DrawLine(rect[0], rect[1]+0.5*rect[3],
rect[0]+rect[2], rect[1]+0.5*rect[3]);
this->Superclass::PaintLegend(painter, rect, 0);
return true;
}
//-----------------------------------------------------------------------------
void vtkPlotLine::PrintSelf(ostream &os, vtkIndent indent)
{
this->Superclass::PrintSelf(os, indent);
}
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