vtkTextWidget.cxx

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

  Program:   Visualization Toolkit
  Module:    vtkTextWidget.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 "vtkTextWidget.h"
#include "vtkCommand.h"
#include "vtkObjectFactory.h"
#include "vtkTextRepresentation.h"

vtkStandardNewMacro(vtkTextWidget);

//------------------------------------------------------------------------------
vtkTextWidget::vtkTextWidget() = default;

//------------------------------------------------------------------------------
vtkTextWidget::~vtkTextWidget() = default;

//------------------------------------------------------------------------------
void vtkTextWidget::SetRepresentation(vtkTextRepresentation* r)
{
  this->Superclass::SetWidgetRepresentation(r);
}

//------------------------------------------------------------------------------
void vtkTextWidget::SetTextActor(vtkTextActor* textActor)
{
  vtkTextRepresentation* textRep = reinterpret_cast<vtkTextRepresentation*>(this->WidgetRep);
  if (!textRep)
  {
    this->CreateDefaultRepresentation();
    textRep = reinterpret_cast<vtkTextRepresentation*>(this->WidgetRep);
  }

  if (textRep->GetTextActor() != textActor)
  {
    textRep->SetTextActor(textActor);
    this->Modified();
  }
}

//------------------------------------------------------------------------------
vtkTextActor* vtkTextWidget::GetTextActor()
{
  vtkTextRepresentation* textRep = reinterpret_cast<vtkTextRepresentation*>(this->WidgetRep);
  if (!textRep)
  {
    return nullptr;
  }
  else
  {
    return textRep->GetTextActor();
  }
}

/**
 * This disables ProcessEvents when we are using relative location in
 * our TextWidgets. When using exact location this override has no effect.
 *
 * We can achieve this since this method is an override of
 * vtkAbstractWidget:GetProcessEvent() which determines if we can process
 * events in this widget.
 */
vtkTypeBool vtkTextWidget::GetProcessEvents()
{
  auto representation = this->GetRepresentation();
  if (representation)
  {
    auto textRepresentation = vtkTextRepresentation::SafeDownCast(representation);
    if (textRepresentation)
    {
      bool isRelativeLocation =
        textRepresentation->GetWindowLocation() != vtkTextRepresentation::AnyLocation;

      if (isRelativeLocation)
      {
        return false;
      }
    }
  }
  return this->Superclass::GetProcessEvents();
}

//------------------------------------------------------------------------------
void vtkTextWidget::CreateDefaultRepresentation()
{
  if (!this->WidgetRep)
  {
    this->WidgetRep = vtkTextRepresentation::New();
  }
}

//------------------------------------------------------------------------------
void vtkTextWidget::PrintSelf(ostream& os, vtkIndent indent)
{
  this->Superclass::PrintSelf(os, indent);
}