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/*=========================================================================
Program: Visualization Toolkit
Module: vtkChartWarning.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 "vtkChartWarning.h"
// Get my new commands
#include "vtkCommand.h"
#include "vtkContext2D.h"
#include "vtkContextScene.h"
#include "vtkContextMouseEvent.h"
#include "vtkPen.h"
#include "vtkBrush.h"
#include "vtkTextProperty.h"
#include "vtkStdString.h"
#include "vtkVectorOperators.h"
#include "vtkAxis.h"
#include "vtkChart.h"
#include "vtkPlot.h"
#include "vtkObjectFactory.h"
//-----------------------------------------------------------------------------
vtkStandardNewMacro(vtkChartWarning)
//-----------------------------------------------------------------------------
vtkChartWarning::vtkChartWarning()
{
this->TextPad = 16.;
}
//-----------------------------------------------------------------------------
vtkChartWarning::~vtkChartWarning()
{
}
//-----------------------------------------------------------------------------
void vtkChartWarning::PrintSelf(ostream &os, vtkIndent indent)
{
this->Superclass::PrintSelf(os, indent);
os << indent << "TextPad: " << this->TextPad << "\n";
}
//-----------------------------------------------------------------------------
bool vtkChartWarning::Paint(vtkContext2D* painter)
{
vtkChart* parent = vtkChart::SafeDownCast(this->GetParent());
if (!parent)
{
return true;
}
if (!this->ArePlotsImproperlyScaled(parent))
{ // Don't render anything when the plots are OK.
return true;
}
vtkRectf cbds = parent->GetSize();
float factorw = (this->Dimensions[0] + this->Dimensions[2]) / cbds.GetWidth();
float factorh = (this->Dimensions[1] + this->Dimensions[3]) / cbds.GetHeight();
float factor = factorw > factorh ? factorw : factorh;
// Now convert factor from a proportion of the width/height to a scale factor for this->Dimension
// if when the proportion (it's starting value) is too high.
factor = factor > 0.5 ? 0.5 / factor : 1.;
float dims[4];
for (int i = 0; i < 4; ++i)
{
dims[i] = factor * this->Dimensions[i];
}
painter->GetTextProp()->SetVerticalJustificationToCentered();
painter->GetTextProp()->SetJustificationToCentered();
painter->GetTextProp()->SetBold(1);
painter->GetTextProp()->SetColor(1.0, 1.0, 1.0);
int fontSize;
float lbds[4]; // label bounds
for (fontSize = 64; fontSize > 4; --fontSize)
{
painter->GetTextProp()->SetFontSize(fontSize);
painter->ComputeStringBounds(this->Label, lbds);
if (
(lbds[3] - lbds[1] < cbds.GetHeight() - dims[3] - dims[1] - 2 * this->TextPad) &&
(lbds[2] - lbds[0] < cbds.GetWidth() - dims[2] - dims[0] - 2 * this->TextPad))
{
break;
}
}
painter->GetPen()->SetColor(167, 40, 40);
painter->GetBrush()->SetColor(167, 40, 40);
painter->GetPen()->SetLineType(vtkPen::SOLID_LINE);
painter->GetPen()->SetWidth(2);
// Draw both a rect and a diagonal to avoid the ugly antialiasing
// artifact generated by drawing the rectangle as 2 triangles.
painter->DrawRect(
cbds.GetX() + dims[0],
cbds.GetY() + dims[1],
cbds.GetWidth() - dims[2] - dims[0],
cbds.GetHeight() - dims[3] - dims[1]);
painter->DrawLine(
cbds.GetX() + dims[0],
cbds.GetY() + dims[1],
cbds.GetX() + dims[0] + cbds.GetWidth() - dims[2] - dims[0],
cbds.GetY() + dims[1] + cbds.GetHeight() - dims[3] - dims[1]);
//float x = cbds.GetX() + dims[0] - lbds[0] + 0.5 * lbds[2];
float x = cbds.GetX() + dims[0] - lbds[0] + 0.5 * (cbds.GetWidth() - dims[2] - dims[0]);
float y = cbds.GetY() + dims[1] - lbds[1] + 0.5 * (cbds.GetHeight() - dims[3] - dims[1]);
if (this->Label)
{
painter->DrawString(x, y, this->Label);
}
this->PaintChildren(painter);
return true;
}
//-----------------------------------------------------------------------------
bool vtkChartWarning::Hit(const vtkContextMouseEvent&)
{
return false;
}
//-----------------------------------------------------------------------------
bool vtkChartWarning::ArePlotsImproperlyScaled(vtkChart* chart)
{
for (int i = 0; i < chart->GetNumberOfPlots(); ++i)
{
vtkPlot* plot = chart->GetPlot(i);
if (!plot->GetVisible())
{
continue;
}
plot->Update();
double bds[4];
plot->GetUnscaledInputBounds(bds);
// If the bounds are invalid, ignore the plot (it has no extent)
if (bds[1] < bds[0])
{
continue;
}
// Are there improper values on the axes that are log-scaled?
int badAxes =
(bds[0] * bds[1] <= 0. ? 1 : 0) +
(bds[2] * bds[3] <= 0. ? 2 : 0);
int logAxes =
(plot->GetXAxis()->GetLogScale() ? 1 : 0) +
(plot->GetYAxis()->GetLogScale() ? 2 : 0);
if (badAxes & logAxes)
{
if (
(!(badAxes & logAxes & 1) || plot->GetXAxis()->GetLogScaleActive()) &&
(!(badAxes & logAxes & 2) || plot->GetYAxis()->GetLogScaleActive()))
{
// Has the user changed the vtkAxis range so that no invalid
// region of the unscaled axis is shown? If so, we do not
// need to warn (for this plot).
continue;
}
return true;
}
}
return false;
}
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