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RenderWindowNoUiFile

vtk-examples/Cxx/Qt/RenderWindowNoUiFile

Description

This is a very basic example that shows how to create a Qt window. Typically, one would want to design a form in the QtDesigner (this is shown in RenderWindowUISingleInheritance).

Question

If you have a question about this example, please use the VTK Discourse Forum

Code

RenderWindowNoUiFile.cxx

#include <QApplication>

#include <vtkActor.h>
#include <vtkGenericOpenGLRenderWindow.h>
#include <vtkNamedColors.h>
#include <vtkNew.h>
#include <vtkPolyDataMapper.h>
#include <vtkProperty.h>
#include <vtkRenderWindow.h>
#include <vtkRenderer.h>
#include <vtkSphereSource.h>
#include <vtkVersion.h>

#if VTK_VERSION_NUMBER >= 89000000000ULL
#define VTK890 1
#endif

#include <QSurfaceFormat>
#include <QVTKOpenGLNativeWidget.h>

int main(int argc, char** argv)
{
  // Needed to ensure appropriate OpenGL context is created for VTK rendering.
  QSurfaceFormat::setDefaultFormat(QVTKOpenGLNativeWidget::defaultFormat());

  QApplication app(argc, argv);

  QVTKOpenGLNativeWidget widget;

  vtkNew<vtkNamedColors> colors;

  vtkNew<vtkGenericOpenGLRenderWindow> renderWindow;
#if VTK890
  widget.setRenderWindow(renderWindow);
#else
  widget.SetRenderWindow(renderWindow);
#endif

  widget.resize(600, 600);

  vtkNew<vtkSphereSource> sphereSource;

  vtkNew<vtkPolyDataMapper> sphereMapper;
  sphereMapper->SetInputConnection(sphereSource->GetOutputPort());

  vtkNew<vtkActor> sphereActor;
  sphereActor->SetMapper(sphereMapper);
  sphereActor->GetProperty()->SetColor(colors->GetColor4d("Tomato").GetData());

  vtkNew<vtkRenderer> renderer;
  renderer->AddActor(sphereActor);
  renderer->SetBackground(colors->GetColor3d("SteelBlue").GetData());

#if VTK890
  widget.renderWindow()->AddRenderer(renderer);
  widget.renderWindow()->SetWindowName("RenderWindowNoUIFile");
#else
  widget.GetRenderWindow()->AddRenderer(renderer);
  widget.GetRenderWindow()->SetWindowName("RenderWindowNoUIFile");
#endif
  widget.show();

  app.exec();

  return EXIT_SUCCESS;
}

CMakeLists.txt

cmake_minimum_required(VERSION 3.12 FATAL_ERROR)

project(RenderWindowNoUiFile)

find_package(VTK COMPONENTS 
  vtkCommonColor
  vtkCommonCore
  vtkFiltersSources
  vtkGUISupportQt
  vtkInteractionStyle
  vtkRenderingContextOpenGL2
  vtkRenderingCore
  vtkRenderingFreeType
  vtkRenderingGL2PSOpenGL2
  vtkRenderingOpenGL2
  QUIET
)

if (NOT VTK_FOUND)
  message("Skipping RenderWindowNoUiFile: ${VTK_NOT_FOUND_MESSAGE}")
  return()
endif()
message (STATUS "VTK_VERSION: ${VTK_VERSION}")
if (VTK_VERSION VERSION_LESS "8.90.0")
  # old system
  include(${VTK_USE_FILE})
  add_executable(RenderWindowNoUiFile MACOSX_BUNDLE RenderWindowNoUiFile.cxx )
  target_link_libraries(RenderWindowNoUiFile PRIVATE ${VTK_LIBRARIES})
else()
  # Prevent a "command line is too long" failure in Windows.
  set(CMAKE_NINJA_FORCE_RESPONSE_FILE "ON" CACHE BOOL "Force Ninja to use response files.")
  add_executable(RenderWindowNoUiFile MACOSX_BUNDLE RenderWindowNoUiFile.cxx )
  target_link_libraries(RenderWindowNoUiFile PRIVATE ${VTK_LIBRARIES})
  # vtk_module_autoinit is needed
  vtk_module_autoinit(
    TARGETS RenderWindowNoUiFile
    MODULES ${VTK_LIBRARIES}
    )
endif()

Download and Build RenderWindowNoUiFile

Click here to download RenderWindowNoUiFile and its CMakeLists.txt file. Once the tarball RenderWindowNoUiFile.tar has been downloaded and extracted,

cd RenderWindowNoUiFile/build

If VTK is installed:

cmake ..

If VTK is not installed but compiled on your system, you will need to specify the path to your VTK build:

cmake -DVTK_DIR:PATH=/home/me/vtk_build ..

Build the project:

make

and run it:

./RenderWindowNoUiFile

WINDOWS USERS

Be sure to add the VTK bin directory to your path. This will resolve the VTK dll's at run time.