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 RenderWindowUi)

RenderWindowNoUiFile.cxx

#include <QApplication>

#include <vtkSmartPointer.h>
#include <vtkSphereSource.h>
#include <vtkPolyDataMapper.h>
#include <vtkActor.h>
#include <vtkRenderWindow.h>
#include <vtkRenderer.h>

#include <QVTKWidget.h>

int main(int argc, char** argv)
{
  QApplication app(argc, argv);

  QVTKWidget widget;
  widget.resize( 256, 256 );

  vtkSmartPointer<vtkSphereSource> sphereSource =
      vtkSmartPointer<vtkSphereSource>::New();

  vtkSmartPointer<vtkPolyDataMapper> sphereMapper =
      vtkSmartPointer<vtkPolyDataMapper>::New();
  sphereMapper->SetInputConnection( sphereSource->GetOutputPort() );

  vtkSmartPointer<vtkActor> sphereActor =
      vtkSmartPointer<vtkActor>::New();
  sphereActor->SetMapper( sphereMapper );

  vtkSmartPointer<vtkRenderer> renderer =
      vtkSmartPointer<vtkRenderer>::New();
  renderer->AddActor( sphereActor );
 
  widget.GetRenderWindow()->AddRenderer( renderer );
  widget.show();

  app.exec();

  return EXIT_SUCCESS;
}

CMakeLists.txt

cmake_minimum_required(VERSION 2.8)
 
if(POLICY CMP0020)
  cmake_policy(SET CMP0020 NEW)
endif()

PROJECT(RenderWindowNoUiFile)

find_package(VTK REQUIRED)
include(${VTK_USE_FILE})

if(${VTK_VERSION} VERSION_GREATER "6" AND VTK_QT_VERSION VERSION_GREATER "4")
  # Instruct CMake to run moc automatically when needed.
  set(CMAKE_AUTOMOC ON)
  find_package(Qt5Widgets REQUIRED QUIET)
else()
  find_package(Qt4 REQUIRED)
  include(${QT_USE_FILE})
endif()

include_directories(${CMAKE_CURRENT_SOURCE_DIR} ${CMAKE_CURRENT_BINARY_DIR})

file(GLOB UI_FILES *.ui)
file(GLOB QT_WRAP *.h)
file(GLOB CXX_FILES *.cxx)

if(${VTK_VERSION} VERSION_GREATER "6" AND VTK_QT_VERSION VERSION_GREATER "4")
  qt5_wrap_ui(UISrcs ${UI_FILES} )
  # CMAKE_AUTOMOC in ON so the MOC headers will be automatically wrapped.
  add_executable(RenderWindowNoUiFile MACOSX_BUNDLE
    ${CXX_FILES} ${UISrcs} ${QT_WRAP})
  qt5_use_modules(RenderWindowNoUiFile Core Gui)
  target_link_libraries(RenderWindowNoUiFile ${VTK_LIBRARIES})
else()
  QT4_WRAP_UI(UISrcs ${UI_FILES})
  QT4_WRAP_CPP(MOCSrcs ${QT_WRAP})
  add_executable(RenderWindowNoUiFile MACOSX_BUNDLE ${CXX_FILES} ${UISrcs} ${MOCSrcs})

  if(VTK_LIBRARIES)
    if(${VTK_VERSION} VERSION_LESS "6")
      target_link_libraries(RenderWindowNoUiFile ${VTK_LIBRARIES} QVTK)
    else()
      target_link_libraries(RenderWindowNoUiFile ${VTK_LIBRARIES})
    endif()
  else()
    target_link_libraries(RenderWindowNoUiFile vtkHybrid QVTK vtkViews ${QT_LIBRARIES})
  endif()
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

This example requires Qt and VTK.

• If VTK and Qt are 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 ..

• If Qt is not found on your system, you will need to tell CMake where to find qmake:

cmake -DQT_QMAKE_EXECUTABLE:FILEPATH=/usr/something/qmake  ..

Build the project:

make

and run it:

./RenderWindowNoUiFile

WINDOWS USERS PLEASE NOTE: Be sure to add the VTK bin directory to your path. This will resolve the VTK dll's at run time. You may also need to add a Qt related path.