nmWTAI-Platform/3rd/VTK7.1/source/VTK-7.1.1/Interaction/Widgets/vtkSliderRepresentation.cxx

/*=========================================================================

  Program:   Visualization Toolkit
  Module:    vtkSliderRepresentation.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 "vtkSliderRepresentation.h"

#include "vtkCommand.h"
#include "vtkObjectFactory.h"
#include "vtkRenderer.h"

//----------------------------------------------------------------------
vtkSliderRepresentation::vtkSliderRepresentation()
{
  this->MinimumValue = 0.0;
  this->Value   = 0.0;
  this->MaximumValue = 1.0;
  this->CurrentT = 0.0;
  this->PickedT = 0.0;

  this->SliderLength = 0.05;
  this->SliderWidth = 0.05;
  this->EndCapLength = 0.025;
  this->EndCapWidth = 0.05;
  this->TubeWidth = 0.025;

  // Labels and text
  this->ShowSliderLabel = 1;

  this->LabelFormat = new char[8];
  sprintf( this->LabelFormat,"%s","%0.3g" );

  this->LabelHeight = 0.05;
  this->TitleHeight = 0.15;
}


//----------------------------------------------------------------------
vtkSliderRepresentation::~vtkSliderRepresentation()
{
  delete [] this->LabelFormat;
  this->LabelFormat = NULL;
}

//----------------------------------------------------------------------
void vtkSliderRepresentation::SetMinimumValue(double minValue)
{
  if ( minValue == this->MinimumValue )
  {
    return;
  }

  if ( minValue >= this->MaximumValue )
  {
    this->MaximumValue = minValue + 1;
  }

  this->MinimumValue = minValue;

  if ( this->Value < this->MinimumValue )
  {
    this->Value = this->MinimumValue;
    this->CurrentT = 0.0;
  }
  else if ( this->Value > this->MaximumValue )
  {
    this->Value = this->MaximumValue;
    this->CurrentT = 1.0;
  }

  this->InvokeEvent(vtkCommand::WidgetValueChangedEvent,NULL);
  if ( this->Renderer )
  {
    this->BuildRepresentation();
  }
  this->Modified();
}

//----------------------------------------------------------------------
void vtkSliderRepresentation::SetMaximumValue(double maxValue)
{
  if ( maxValue == this->MaximumValue )
  {
    return;
  }

  if ( maxValue <= this->MinimumValue )
  {
    this->MinimumValue = maxValue - 1;
  }

  this->MaximumValue = maxValue;

  if ( this->Value < this->MinimumValue )
  {
    this->Value = this->MinimumValue;
    this->CurrentT = 0.0;
  }
  else if ( this->Value > this->MaximumValue )
  {
    this->Value = this->MaximumValue;
    this->CurrentT = 1.0;
  }

  this->InvokeEvent(vtkCommand::WidgetValueChangedEvent,NULL);
  if ( this->Renderer )
  {
    this->BuildRepresentation();
  }
  this->Modified();
}

//----------------------------------------------------------------------
void vtkSliderRepresentation::SetValue(double value)
{
  if ( value == this->Value )
  {
    return;
  }

  if ( value < this->MinimumValue )
  {
    value = this->MinimumValue;
  }

  if ( value > this->MaximumValue )
  {
    value = this->MaximumValue;
  }

  this->Value = value;
  this->CurrentT = (value - this->MinimumValue) / (this->MaximumValue - this->MinimumValue);

  this->InvokeEvent(vtkCommand::WidgetValueChangedEvent,NULL);
  if ( this->Renderer )
  {
    this->BuildRepresentation();
  }
  this->Modified();
}

//----------------------------------------------------------------------
void vtkSliderRepresentation::PrintSelf(ostream& os, vtkIndent indent)
{
  //Superclass typedef defined in vtkTypeMacro() found in vtkSetGet.h
  this->Superclass::PrintSelf(os,indent);

  os << indent << "Minimum Value: " << this->MinimumValue << "\n";
  os << indent << "Maximum Value: " << this->MaximumValue << "\n";
  os << indent << "Value: " << this->Value << "\n";

  os << indent << "Slider Length: " << this->SliderLength << "\n";
  os << indent << "Slider Width: " << this->SliderWidth << "\n";
  os << indent << "End Cap Length: " << this->EndCapLength << "\n";
  os << indent << "End Cap Width: " << this->EndCapWidth << "\n";
  os << indent << "Tube Width: " << this->TubeWidth << "\n";

  os << indent << "Show Slider Label: "
     << (this->ShowSliderLabel ? "On\n" : "Off\n");
  os << indent << "Label Format: " << this->LabelFormat << "\n";
  os << indent << "Label Height: " << this->LabelHeight << "\n";
  os << indent << "Title Height: " << this->TitleHeight << "\n";
}